What are Circuit Breakers ?
Circuit Breakers are devices designed to automatically interrupt electrical circuits to prevent damage from overloads or short circuits. They are commonly used in applications like new product design, production electronics assembly, and field replacements. Important specifications include Current Rating (Amps), which determines the maximum load the breaker can handle; Breaker Type, which affects the operational characteristics; and Voltage Rating, which ensures compatibility with the electrical system. Sourcing teams should validate lifecycle status and consider alternate-source options to mitigate procurement risks.
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| Part & Mfr | Total Stock | Pricing & RFQ | Actuator Type | Approval Agency | Breaker Type | Current Rating | Current Rating (Amps) | Degree of Protection | Illumination | Illumination Voltage (Nominal) | Insulation Resistance | Interrupting Capacity | Lead Style | Mounting Type | Number of Poles | Operating Temperature | Panel Thickness | SVHC Present | Shock Resistance | Storage Temperature | Termination Style | Vibration Resistance | Voltage Rating | Voltage Rating AC | Voltage Rating DC | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Sensata
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10
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Price on request
10
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Lever | - | Magnetic (Hydraulic Delay) | - | 30A | - | - | - | - | - | - | Panel Mount | 2 | - | - | - | - | - | - | - | - | - | - | |
OptiFuse
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10
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Price on request
10
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Automatic Reset | SAEJ553, UL | - | - | 6A | - | None | - | - | - | - | - | 1 | - | - | - | - | - | - | - | 14 V | - | - | |
OptiFuse
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10
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Price on request
10
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Push to Reset | CSA, cULus | Thermal | - | 3A | - | None | - | - | - | - | - | 1 | - | - | - | - | - | - | - | 250 V | - | - | |
OptiFuse
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10
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Price on request
10
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Push to Reset | cURus, UR | Thermal | - | 40A | - | None | - | - | - | - | Panel Mount | 1 | - | - | - | - | - | - | - | 250 V | - | - | |
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Littelfuse Inc.
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10
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Price on request
10
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Toggle | CCC, CSA, UL1077, UL1500 | Magnetic (Hydraulic Delay) | - | 25A | - | None | - | - | - | - | Panel Mount | 2 | - | - | - | - | - | - | - | 277 V | - | - | |
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Littelfuse Inc.
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10
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Price on request
10
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Lever | CCC, CSA, UL | Magnetic (Hydraulic Delay) | - | 40A | - | None | - | - | - | - | Panel Mount | 1 | - | - | - | - | - | - | - | 480 V | - | - | |
OptiFuse
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10
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Price on request
10
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Automatic Reset | IEC60934, SAEJ553, UL | - | - | 7.5A | - | None | - | - | - | - | - | 1 | - | - | - | - | - | - | - | 58 V | - | - | |
OptiFuse
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10
|
Price on request
10
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Push to Reset | SAEJ553, UL | - | - | 7.5A | - | None | - | - | - | - | - | 1 | - | - | - | - | - | - | - | 28 V | - | - | |
OptiFuse
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10
|
Price on request
10
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Automatic Reset | SAEJ553 | - | - | 40A | - | None | - | - | - | - | - | 1 | - | - | - | - | - | - | - | 12 V | - | - | |
|
Sensata
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10
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Price on request
10
|
Lever | - | Magnetic (Hydraulic Delay) | - | 30A | - | - | - | - | - | - | Panel Mount | 3 | - | - | - | - | - | - | - | - | - | - | |
Schurter Inc.
<p>The Schurter 4404.0004 is a single-pole thermal circuit breaker from the T9-611 series, designed for equipment protection. It is rated for 10A continuous current and can interrupt up to 240VAC or 48VDC. The breaker features a push-to-reset actuator and a cycling trip-free release mechanism, ensuring reliable overcurrent protection.</p><p> </p><p>This circuit breaker uses a snap-in panel mount (panel thickness 0.8-2.0mm) and quick connect terminals (6.3 x 0.8mm). It has a dielectric strength of 1500VAC and insulation resistance greater than 1000 Mohm at 500VDC. The front side is protected to IP40. Operating temperature range is -5°C to 60°C at 10A.</p><p> </p><p>The 4404.0004 carries approvals from CSA, EN, GB, IEC, and UL, making it suitable for industrial, HVAC, power supply, and household appliance applications. Weight is 9-13 grams.</p>
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10
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Price on request
10
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Push to Reset | CSA C22.2 No 235, EN 60934, GB 17701, IEC 60934, UL1077 | Thermal | - | 10A | - | - | - | - | - | Faston Plug 6.3 X 0.8 Mm | Panel Mount | 1 | -5°C to 60°C (10A) | - | - | - | -5°C ~ 60°C | Quick Connect (6.3 x 0.8 mm) | - | 240 V | - | - | |
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9
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Price on request
9
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Push-Pull Plunger | - | Thermal | - | 50A | - | None | - | - | - | - | Panel Mount | 3 | - | - | - | - | - | - | - | 200 V | - | - | ||
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Altech Corporation
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8
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Price on request
8
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Lever | CE, cULus, UL489 | Thermal Magnetic | - | 1A | - | None | - | - | - | - | DIN Rail | 2 | - | - | - | - | - | - | - | 480 V | - | - | |
TE Connectivity
|
8
|
Price on request
8
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Push to Reset | - | Thermal | - | 2A | - | - | - | - | - | - | Panel Mount | 1 | - | - | - | - | - | - | - | 250 V | - | - | |
Littelfuse Inc.
|
8
|
Price on request
8
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Lever | CSA, UL | Magnetic (Hydraulic Delay) | - | 20A | - | None | - | - | - | - | DIN Rail | 2 | - | - | - | - | - | - | - | 480 V | - | - | |
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Littelfuse Inc.
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8
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Price on request
8
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Rocker | CCC, CSA, UL1077 | Magnetic (Hydraulic Delay) | - | 25A | - | None | - | - | - | - | Panel Mount | 1 | - | - | - | - | - | - | - | 250 V | - | - | |
Littelfuse Inc.
|
7
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Price on request
7
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Rocker | CSA, UL, VDE | Magnetic (Hydraulic Delay) | - | 10A | - | None | - | - | - | - | Panel Mount | 1 | - | - | - | - | - | - | - | 277 V | - | - | |
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Littelfuse Inc.
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7
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Price on request
7
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Lever | CCC, CSA, UL | Magnetic (Hydraulic Delay) | - | 10A | - | None | - | - | - | - | Panel Mount | 1 | - | - | - | - | - | - | - | 480 V | - | - | |
|
Littelfuse Inc.
|
7
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Price on request
7
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Push to Reset | CCC, CSA, UL1077 | Magnetic (Hydraulic Delay) | - | 25A | - | None | - | - | - | - | Panel Mount | 1 | - | - | - | - | - | - | - | 250 V | - | - | |
Schurter Inc.
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6
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Price on request
6
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Lever | CSA C22.2 No 14, CSA C22.2 No 235, EN 60934, GB 17701, IEC 60934, UL1077, UL508 | Thermal Magnetic | - | 10A | - | - | - | - | - | - | DIN Rail | 2 | - | - | - | - | - | - | - | 480 V | - | - | |
E-T-A
<p>The E-T-A 104-PR-4A is a single pole thermal circuit breaker from the 104 series, designed for overcurrent protection in a compact form factor. It employs a positively trip-free snap action mechanism that ensures reliable switching behavior, meeting the requirements of circuit breaker standard EN 60934 (IEC 60934) as an R-Type, TO device.</p><p> </p><p>The breaker is rated for a current of 4A at both 240VAC and 48VDC. It has an interrupting capacity of 6 times the rated current (6 x IN) for AC and DC circuits. The dielectric strength is tested at 3000 VAC at the actuating area, and insulation resistance is greater than 100 MΩ at 500 VDC.</p><p> </p><p>This model uses a push-to-reset actuator and is designed for through hole mounting with soldering pins (PR terminal design) for horizontal PCB mounting. It has an operating temperature range of -20 to 60 °C. The operating area is rated IP40, and the terminal area is IP00. It is vibration resistant to 10 g (57-500 Hz) and shock resistant to 25 g (11 ms), tested to IEC standards.</p>
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6
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Price on request
6
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Push to Reset | - | Thermal | 4 A | 4A | IP40 (operating area), IP00 (terminal area) | - | - | >100 MΩ at 500 VDC | 6 x IN (AC/DC) | Solder Pin | Through Hole | 1 | - | - | - | 25 g (11 ms) | - | Soldering pins for horizontal PCB mounting | 10 g (57-500 Hz), ±0.76 mm (10-57 Hz) | 240 V | 240 VAC | 48 VDC | |
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Littelfuse Inc.
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6
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Price on request
6
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Rocker | CCC, CSA, UL | Magnetic (Hydraulic Delay) | - | 5A | - | None | - | - | - | - | Panel Mount | 1 | - | - | - | - | - | - | - | 277 V | - | - | |
Altech Corporation
<p>The Altech Corporation 1BU25R is a 1-pole thermal magnetic supplementary protector from the R-Series. It is rated for 25A continuous current at 480V AC (277/480Y VAC) and provides a short circuit withstand rating of 10kA per UL 1077. The breaker uses a B trip curve and is designed for DIN rail mounting with a 17.5mm width per pole.</p><p> </p><p>Key electrical specifications include a DC voltage rating of 48 VDC (self-certified) and an interrupting capacity of 10kA per IEC/EN 60898/60947-2. The device offers an electrical life of 6,000 cycles and a mechanical life of 10,000 cycles. It operates over a temperature range of -25°C to 60°C and can be stored from -25°C to 75°C.</p><p> </p><p>Mechanically, the 1BU25R accepts copper wire only (60/75°C) with terminal sizes from 14-3 AWG (torque 17.5 lb-in) and 18-16 AWG (torque 25 lb-in). The terminal protection degree is IP20 at the front. It is vibration resistant to 3g (18-50Hz) and can be mounted in any plane. The device is approved to CE, cURus, and UL 1077 standards.</p>
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6
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Price on request
6
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Lever | CE, cURus, UL1077 | Thermal Magnetic | 25A | 25A | - | None | - | - | - | - | DIN Rail | 1 | -25 to 60°C | - | Not Present | - | -25°C ~ 75°C | - | 3g | 480V | - | - | |
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Littelfuse Inc.
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6
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Price on request
6
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Toggle | CCC, CSA, UL | Magnetic (Hydraulic Delay) | - | 5A | - | None | - | - | - | - | Panel Mount | 2 | - | - | - | - | - | - | - | 480 V | - | - | |
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E-T-A
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6
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Price on request
6
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Rocker | CSA C22.2 No 235, GB 17701, IEC 60934, UL1077 | Thermal | - | 2A | - | None | - | - | - | - | Panel Mount | 1 | - | - | - | - | - | - | - | 250 V | - | - | |
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Littelfuse Inc.
|
6
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Price on request
6
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Push-Pull | CCC, CSA, UL1077 | Magnetic (Hydraulic Delay) | - | 15A | - | None | - | - | - | - | Panel Mount | 1 | - | - | - | - | - | - | - | 250 V | - | - | |
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Littelfuse Inc.
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5
|
Price on request
5
|
Lever | CCC, CSA, TUV, UL | Magnetic (Hydraulic Delay) | - | 10A | - | None | - | - | - | - | Panel Mount | 1 | - | - | - | - | - | - | - | 480 V | - | - | |
|
Littelfuse Inc.
|
5
|
Price on request
5
|
Lever | CCC, CSA, UL | Magnetic (Hydraulic Delay) | - | 20A | - | None | - | - | - | - | Panel Mount | 2 | - | - | - | - | - | - | - | 480 V | - | - | |
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Littelfuse Inc.
|
5
|
Price on request
5
|
Rocker | CCC, CSA, UL | Magnetic (Hydraulic Delay) | - | 50A | - | None | - | - | - | - | Panel Mount | 1 | - | - | - | - | - | - | - | 277 V | - | - | |
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Littelfuse Inc.
|
5
|
Price on request
5
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Lever | CCC, CSA, UL | Magnetic (Hydraulic Delay) | - | 15A | - | None | - | - | - | - | Panel Mount | 2 | - | - | - | - | - | - | - | 480 V | - | - | |
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Littelfuse Inc.
|
5
|
Price on request
5
|
Lever | CCC, CSA, UL | Magnetic (Hydraulic Delay) | - | 10A | - | None | - | - | - | - | Panel Mount | 2 | - | - | - | - | - | - | - | 480 V | - | - | |
Qualtek
<p>This Qualtek QLB-253-00DNN-3BA is a thermal circuit breaker designed for reliable overcurrent protection. It offers a robust 25A current rating and a 250VAC voltage rating, with an additional rating of 32VDC.</p><p> </p><p>The breaker features a convenient push-to-reset actuator for manual operation. Its design is optimized for panel mounting, with a specified panel thickness range of 0.8mm to 2.5mm and a panel cutout diameter of 15.8 ± 0.2 mm.</p><p> </p><p>Key electrical specifications include a single pole configuration and a thermal tripping mechanism. This makes it suitable for various industrial and commercial applications requiring dependable circuit protection.</p><p> </p><p>Compliance information indicates RoHS status as Compliant, though this is unverified. The part is also listed with an MSL rating of 1 and REACH status as Unaffected, both also unverified.</p>
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5
|
Price on request
5
|
Push to Reset | - | Thermal | 25A | 25A | - | - | - | - | - | - | Panel Mount | 1 | - | 0.8mm~2.5mm | - | - | - | - | - | 250V | - | 25A 125-250V AC/32V DC PANEL THICKNESS: 0.8mm~2.5mm | |
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E-T-A
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5
|
Price on request
5
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Push-Pull Plunger | CSA C22.2 No 235, UL1077 | Thermal | - | 10A | - | None | - | - | - | - | Panel Mount | 1 | - | - | - | - | - | - | - | 115 V | - | - | |
|
E-T-A
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5
|
Price on request
5
|
Push-Pull Plunger | CSA C22.2 No 235, UL1077 | Thermal | - | 15A | - | None | - | - | - | - | Panel Mount | 1 | - | - | - | - | - | - | - | 115 V | - | - | |
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4
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Price on request
4
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Push-Pull Plunger | CSA C22.2 No 235, UL1077 | Thermal | - | 7.5A | - | None | - | - | - | - | Panel Mount | 1 | - | - | - | - | - | - | - | 115 V | - | - | ||
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Littelfuse Inc.
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4
|
Price on request
4
|
Toggle | CCC, CSA, UL | Magnetic (Hydraulic Delay) | - | 15A | - | None | - | - | - | - | Panel Mount | 2 | - | - | - | - | - | - | - | 480 V | - | - | |
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E-T-A
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4
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Price on request
4
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Push-Pull Plunger | CSA C22.2 No 235, UL1077 | Thermal | - | 5A | - | None | - | - | - | - | Panel Mount | 1 | - | - | - | - | - | - | - | 115 V | - | - | |
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Littelfuse Inc.
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4
|
Price on request
4
|
Lever | CCC, CSA, UL489 | Magnetic (Hydraulic Delay) | - | 20A | - | None | - | - | - | - | Panel Mount | 2 | - | - | - | - | - | - | - | 240 V | - | - | |
|
Altech Corporation
<p>The 1C6UM is a thermal magnetic circuit breaker manufactured by Altech Corporation. It provides overcurrent protection with a current rating of 6A and a voltage rating of 480V AC. The single-pole design makes it suitable for 1-phase applications.</p><p> </p><p>The breaker utilizes a thermal magnetic trip mechanism for reliable protection against overloads and short circuits. It is actuated by a lever and has no illumination. The compact design supports DIN Rail mounting, commonly used in industrial control panels and distribution systems.</p><p> </p><p>Mechanically, the breaker is built for DIN Rail installation, which simplifies assembly and replacement. The lever actuator offers clear visual indication of the breaker status. The unit is not illuminated, reducing complexity.</p><p> </p><p>Compliance includes CSA, UL508, and VDE approvals. The RoHS status is indicated as RoHS3 compliant, though this is unverified. The part is designated as REACH unaffected. Moisture sensitivity level is MSL 1 (unlimited).</p>
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4
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Price on request
4
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Lever | CSA, UL508, VDE | Thermal Magnetic | 6 A | 6A | - | None | - | - | - | - | DIN Rail | 1 | - | - | - | - | - | - | - | 480 V | - | - | |
TE Connectivity
|
4
|
Price on request
4
|
Toggle | - | Thermal | - | 30A | - | - | - | - | - | - | Panel Mount | 1 | - | - | - | - | - | - | - | 240 V | - | - | |
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Littelfuse Inc.
|
4
|
Price on request
4
|
Lever | CCC, CSA, UL | Magnetic (Hydraulic Delay) | - | 20A | - | None | - | - | - | - | Panel Mount | 1 | - | - | - | - | - | - | - | 277 V | - | - | |
TE Connectivity
|
4
|
Price on request
4
|
Lever | - | Magnetic (Hydraulic Delay) | - | 1A | - | - | - | - | - | - | Panel Mount | 1 | - | - | - | - | - | - | - | 277 V | - | - | |
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Littelfuse Inc.
|
3
|
Price on request
3
|
Lever | CCC, CSA, UL, VDE | Magnetic (Hydraulic Delay) | - | 15A | - | None | - | - | - | - | Panel Mount | 1 | - | - | - | - | - | - | - | 250 V | - | - | |
Phoenix Contact
<p>The Phoenix Contact 2800843 is a thermal magnetic circuit breaker designed for overcurrent protection in electrical circuits. It is rated for 10A continuous current at 277VAC, with a single pole configuration. The breaker features a slide switch actuator for manual reset and a holder mount for secure installation.</p><p> </p><p>This circuit breaker provides reliable protection against overloads and short circuits, making it suitable for use in industrial control panels, lighting systems, and power distribution applications. The thermal magnetic trip mechanism combines thermal and magnetic elements for accurate and fast response.</p><p> </p><p>The holder mount design allows for easy installation in panel or enclosure cutouts. The compact single-pole form factor saves space in crowded electrical assemblies.</p>
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3
|
Price on request
3
|
Slide Switch | - | Thermal Magnetic | 10A | 10A | - | - | - | - | - | - | Holder | 1 | - | - | - | - | - | - | - | 277 V | - | - | |
TE Connectivity
|
3
|
Price on request
3
|
Push to Reset | - | Thermal | - | 8A | - | - | - | - | - | - | Panel Mount | 1 | - | - | - | - | - | - | - | 250 V | - | - | |
Weidmüller
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3
|
Price on request
3
|
Push to Reset | CSA C22.2 No 235, UL1077, VDE | Thermal Magnetic | - | 2A | - | - | - | - | - | - | DIN Rail | 2 | - | - | - | - | - | - | - | 250 V | - | - | |
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Littelfuse Inc.
|
3
|
Price on request
3
|
Lever | CCC, CSA, UL489, VDE | Magnetic (Hydraulic Delay) | - | 15A | - | None | - | - | - | - | Panel Mount | 2 | - | - | - | - | - | - | - | 240 V | - | - | |
|
Phoenix Contact
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2
|
Price on request
2
|
Slide Switch | - | Thermal Magnetic | - | 2A | - | - | - | - | - | - | Holder | 1 | - | - | - | - | - | - | - | 277 V | - | - | |
|
Littelfuse Inc.
|
2
|
Price on request
2
|
Lever | CCC, CSA, UL | Magnetic (Hydraulic Delay) | - | 15A | - | None | - | - | - | - | Panel Mount | 1 | - | - | - | - | - | - | - | 480 V | - | - | |
Schurter Inc.
|
2
|
Price on request
2
|
Rocker | - | Thermal | - | 500mA | - | Blue | 120V | - | - | - | Panel Mount | 2 | - | - | - | - | - | - | - | 240 V | - | - |
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