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.
Parts in this category
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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
|
10,800
|
Price on request
10,800
|
Lever | CSA, TUV, UL1077 | Magnetic (Hydraulic Delay) | - | 8A | - | - | - | - | - | - | Panel Mount | 2 | - | - | - | - | - | - | - | - | - | - | |
|
Sensata
|
5,000
|
Price on request
5,000
|
Lever | CSA, TUV, UL1077 | Magnetic (Hydraulic Delay) | - | 15A | - | - | - | - | - | - | Panel Mount | 1 | - | - | - | - | - | - | - | - | - | - | |
TE Connectivity
|
4,060
|
Price on request
4,060
|
Push to Reset | - | Thermal | - | 3A | - | - | - | - | - | - | Panel Mount | 1 | - | - | - | - | - | - | - | 250 V | - | - | |
|
TE Connectivity
|
1,455
|
Price on request
1,455
|
Push to Reset | - | Thermal | - | 4A | - | - | - | - | - | - | Panel Mount | 1 | - | - | - | - | - | - | - | 250 V | - | - | |
TE Connectivity
|
1,204
|
Price on request
1,204
|
Push to Reset | - | Thermal | - | 6A | - | - | - | - | - | - | Panel Mount | 1 | - | - | - | - | - | - | - | 250 V | - | - | |
TE Connectivity
|
1,000
|
Price on request
1,000
|
Push to Reset | - | Thermal | - | 7A | - | - | - | - | - | - | Panel Mount | 1 | - | - | - | - | - | - | - | 250 V | - | - | |
|
TE Connectivity
|
713
|
Price on request
713
|
Push to Reset | - | Thermal | - | 12A | - | - | - | - | - | - | Panel Mount | 1 | - | - | - | - | - | - | - | 250 V | - | - | |
NTE Electronics
|
587
|
Price on request
587
|
Rocker | CSA, UR | Thermal | - | 8A | - | None | - | - | - | - | Panel Mount, Snap-In | 1 | - | - | - | - | - | - | - | 250 V | - | - | |
TE Connectivity
|
562
|
Price on request
562
|
Rocker | - | Thermal | - | 5A | - | Red | - | - | - | - | Panel Mount | 1 | - | - | - | - | - | - | - | 125 V | - | - | |
NTE Electronics
|
503
|
Price on request
503
|
Rocker | CSA, UR | Thermal | - | 2A | - | None | - | - | - | - | Panel Mount, Snap-In | 1 | - | - | - | - | - | - | - | 250 V | - | - | |
NTE Electronics
|
469
|
Price on request
469
|
Rocker | CSA, UR | Thermal | - | 500mA | - | None | - | - | - | - | Panel Mount, Snap-In | 1 | - | - | - | - | - | - | - | 250 V | - | - | |
|
TE Connectivity
|
321
|
Price on request
321
|
Push to Reset | - | Thermal | - | 2.5A | - | - | - | - | - | - | Panel Mount | 1 | - | - | - | - | - | - | - | 250 V | - | - | |
|
Littelfuse Inc.
|
298
|
Price on request
298
|
Push-Pull | CCC, CSA, UL1077 | Magnetic (Hydraulic Delay) | - | 1A | - | None | - | - | - | - | Panel Mount | 1 | - | - | - | - | - | - | - | 250 V | - | - | |
NTE Electronics
|
291
|
Price on request
291
|
Rocker | CSA, UR | Thermal | - | 6A | - | None | - | - | - | - | Panel Mount, Snap-In | 1 | - | - | - | - | - | - | - | 250 V | - | - | |
|
TE Connectivity
|
252
|
Price on request
252
|
Push to Reset | - | Thermal | - | 6A | - | - | - | - | - | - | Panel Mount | 1 | - | - | - | - | - | - | - | 250 V | - | - | |
NTE Electronics
|
238
|
Price on request
238
|
Rocker | CSA, UR | Thermal | - | 3A | - | None | - | - | - | - | Panel Mount, Snap-In | 1 | - | - | - | - | - | - | - | 250 V | - | - | |
|
TE Connectivity
|
200
|
Price on request
200
|
Rocker | - | Thermal | - | 10A | - | Red | - | - | - | - | Panel Mount | 1 | - | - | - | - | - | - | - | 125 V | - | - | |
TE Connectivity
|
181
|
Price on request
181
|
Push to Reset | - | Thermal | - | 15A | - | - | - | - | - | - | Panel Mount | 1 | - | - | - | - | - | - | - | 250 V | - | - | |
|
Littelfuse Inc.
|
144
|
Price on request
144
|
Lever | CCC, CSA, UL | Magnetic (Hydraulic Delay) | - | 40A | - | None | - | - | - | - | Panel Mount | 1 | - | - | - | - | - | - | - | 277 V | - | - | |
|
Sensata
|
144
|
Price on request
144
|
- | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | |
TE Connectivity
|
130
|
Price on request
130
|
Push to Reset | - | Thermal | - | 3A | - | - | - | - | - | - | Panel Mount | 1 | - | - | - | - | - | - | - | 250 V | - | - | |
|
TE Connectivity
|
109
|
Price on request
109
|
Push to Reset | - | Thermal | - | 15A | - | - | - | - | - | - | Panel Mount | 1 | - | - | - | - | - | - | - | 250 V | - | - | |
|
Littelfuse Inc.
|
96
|
Price on request
96
|
Toggle | CCC, cURus, UL | Magnetic (Hydraulic Delay) | - | 30A | - | None | - | - | - | - | Panel Mount | 1 | - | - | - | - | - | - | - | 240 V | - | - | |
|
Littelfuse Inc.
|
75
|
Price on request
75
|
Push to Reset | CE, cUL, TUV, UL1077, UL1500 | Thermal | - | 7A | - | None | - | - | - | - | Panel Mount | 1 | - | - | - | - | - | - | - | 250 V | - | - | |
Schurter Inc.
|
59
|
Price on request
59
|
Push to Reset | CSA C22.2, UL1077 | Thermal | - | 3A | - | - | - | - | - | - | Panel Mount | 1 | - | - | - | - | - | - | - | 250 V | - | - | |
|
Sensata
|
57
|
Price on request
57
|
- | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | |
|
Littelfuse Inc.
|
50
|
Price on request
50
|
Rocker | CCC, CSA, UL1077 | Magnetic (Hydraulic Delay) | - | 10A | - | Neon | 250V | - | - | - | Panel Mount | 2 | - | - | - | - | - | - | - | 250 V | - | - | |
|
Littelfuse Inc.
|
47
|
Price on request
47
|
Lever | CCC, CSA, UL, VDE | Magnetic (Hydraulic Delay) | - | 15A | - | None | - | - | - | - | Panel Mount | 2 | - | - | - | - | - | - | - | 250 V | - | - | |
Sensata
|
45
|
Price on request
45
|
Toggle | UL1077 | Magnetic (Hydraulic Delay) | - | 20A | - | None | - | - | - | - | Panel Mount | 1 | - | - | - | - | - | - | - | 250 V | - | - | |
|
TE Connectivity
|
44
|
Price on request
44
|
Push to Reset | - | Thermal | - | 1A | - | - | - | - | - | - | Panel Mount | 1 | - | - | - | - | - | - | - | 250 V | - | - | |
E-T-A
<p>The E-T-A 1110-F112-P1M1-0.3A is a single pole thermal circuit breaker with a current rating of 300mA and voltage ratings of 250VAC and 50VDC. It features a tease-free, trip-free snap-action mechanism and a push-push actuator with an indicator band showing the tripped/OFF position.</p><p> </p><p>Designed for snap-in panel mounting, the breaker fits round hole or industry standard fuse-holder cut-outs with panel thicknesses of 0.8 to 1.6 mm. Termination is via blade terminals (A6.3-0.8 QC .250). The internal resistance is typically 12.4 Ω, and the time delay characteristic is medium (M1).</p><p> </p><p>Typical applications include motors, transformers, solenoids, extra low voltage systems, household and office machines, instrumentation, marine applications, and mobile homes. The breaker is approved to CBE standard EN 60934 (IEC 60934) and carries approvals VDE, UL, and CSA.</p>
|
44
|
Price on request
44
|
Push-Push | CSA C22.2 No 235, IEC 60934, UL1077 | Thermal | 300mA | 300mA | - | None | - | - | - | Blade Terminal | Panel Mount, Snap-in | 1 | - | 0.8...1.6 mm | - | - | - | Blade Terminal A6.3-0.8 (QC .250) | - | 250 V | 250 V | 50 V | |
E-T-A
<p>The E-T-A 104-PR-1A is a single pole thermal circuit breaker in a miniaturized design. It utilizes a positively trip-free snap action mechanism for reliable switching. Rated at 1A with a voltage rating of 240VAC and 48VDC, it provides overcurrent protection for a variety of applications.</p><p> </p><p>The breaker offers a dielectric strength of 3000VAC and insulation resistance greater than 100 MΩ at 500VDC. It has an interrupting capacity of 6A (6 x IN) and a rupture capacity of 2000A at 250VAC and 200A at 48VDC per UL 1077. The operating temperature range is -20°C to 60°C.</p><p> </p><p>This component is designed for through hole mounting with solder pin terminals and features a push-to-reset actuator. It carries approvals from VDE, UL, CSA, and CQC, ensuring suitability for global applications. Environmental resistance includes vibration (10 g), shock (25 g), corrosion (96 h salt mist), and humidity (240 h at 95% RH) with an IP40 (operating area) / IP00 (terminal area) degree of protection.</p>
|
42
|
Price on request
42
|
Push to Reset | - | Thermal | 1 A | 1A | IP40 / IP00 | - | - | >100 MΩ @ 500 VDC | 6 A (6 x IN) | Solder Pin | Through Hole | 1 | -20°C to 60°C | - | Present | 25 g | - | Solder Pins | 10 g / 0.76 mm | 240 V | 240 VAC | 48 VDC | |
|
Littelfuse Inc.
|
40
|
Price on request
40
|
Push to Reset | CE, cUL, TUV, UL1077, UL1500 | Thermal | - | 40A | - | None | - | - | - | - | Panel Mount | 1 | - | - | - | - | - | - | - | 250 V | - | - | |
|
E-T-A
|
40
|
Price on request
40
|
Push-Pull Plunger | CSA C22.2 No 235, UL1077 | Thermal | - | 35A | - | None | - | - | - | - | Panel Mount | 1 | - | - | - | - | - | - | - | 115 V | - | - | |
TE Connectivity
|
39
|
Price on request
39
|
Push-Pull Plunger | - | Thermal | - | 3A | - | - | - | - | - | - | Panel Mount | 1 | - | - | - | - | - | - | - | 240 V | - | - | |
|
Littelfuse Inc.
|
33
|
Price on request
33
|
Rocker | CCC, CSA, UL | Switch Only | - | 30A | - | None | - | - | - | - | Panel Mount | 1 | - | - | - | - | - | - | - | 480 V | - | - | |
|
TE Connectivity
|
31
|
Price on request
31
|
Push to Reset | - | Thermal | - | 25A | - | - | - | - | - | - | Panel Mount | 1 | - | - | - | - | - | - | - | 250 V | - | - | |
|
E-T-A
|
30
|
Price on request
30
|
Push-Pull Plunger | CSA C22.2 No 235, UL1077 | Thermal | - | 25A | - | None | - | - | - | - | Panel Mount | 1 | - | - | - | - | - | - | - | 115 V | - | - | |
|
Littelfuse Inc.
|
28
|
Price on request
28
|
Lever | CCC, CSA, UL | Magnetic (Hydraulic Delay) | - | 30A | - | None | - | - | - | - | Panel Mount | 3 | - | - | - | - | - | - | - | 480 V | - | - | |
Siemens
<p>The Siemens SIRIUS 3RV2021-4NA10 is a 3-pole motor protection circuit breaker in size S0, designed for reliable overload and short-circuit protection of motors. It features a thermal Class 10 trip characteristic with an adjustable current response range of 23 to 28 A. The breaker has a rated operational current of 28 A and is suitable for AC-3 applications at 400 V with a rated operating power of 15 kW.</p><p> </p><p>This circuit breaker offers a high breaking capacity of 55 kA (Icu) at 400 V AC and includes phase failure detection for enhanced motor protection. It is approved by multiple agencies including CCC, CSA, EAC, IECEx, and UL, and complies with ATEX Directive 2014/34/EU (Ex II (2) GD).</p><p> </p><p>The device is mounted on a DIN rail with screw terminal connections, ensuring easy installation in industrial control panels. It has a mechanical and electrical service life of 100,000 switching cycles and operates in ambient temperatures from -20 to +60 °C, making it suitable for demanding industrial environments.</p>
|
27
|
Price on request
27
|
Rotary | CCC, CSA, EAC, IECEx, UL | Thermal | 28A | 28A | - | None | - | - | - | Screw | DIN Rail | 3 | - | - | - | - | -20°C ~ 60°C | Screw Terminal | - | 690 V | - | - | |
|
Sensata
|
27
|
Price on request
27
|
- | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | |
|
Littelfuse Inc.
|
25
|
Price on request
25
|
Rocker | CCC, CSA, UL, VDE | Magnetic (Hydraulic Delay) | - | 30A | - | None | - | - | - | - | Panel Mount | 1 | - | - | - | - | - | - | - | 480 V | - | - | |
|
Littelfuse Inc.
|
22
|
Price on request
22
|
Rocker | CCC, CSA, TUV, UL | Magnetic (Hydraulic Delay) | - | 5A | - | None | - | - | - | - | Panel Mount | 1 | - | - | - | - | - | - | - | 250 V | - | - | |
Littelfuse Inc.
|
22
|
Price on request
22
|
Lever | CSA, UL, VDE | Magnetic (Hydraulic Delay) | - | 15A | - | None | - | - | - | - | Panel Mount | 2 | - | - | - | - | - | - | - | 480 V | - | - | |
|
Littelfuse Inc.
|
21
|
Price on request
21
|
Lever | CCC, CSA, UL | Magnetic (Hydraulic Delay) | - | 15A | - | None | - | - | - | - | Panel Mount | 1 | - | - | - | - | - | - | - | 480 V | - | - | |
|
Littelfuse Inc.
|
13
|
Price on request
13
|
Rocker | CCC, CSA, UL1077 | Magnetic (Hydraulic Delay) | - | 15A | - | None | - | - | - | - | Panel Mount | 2 | - | - | - | - | - | - | - | 250 V | - | - | |
|
Littelfuse Inc.
|
12
|
Price on request
12
|
Toggle | CCC, CSA, UL | Magnetic (Hydraulic Delay) | - | 30A | - | None | - | - | - | - | Panel Mount | 1 | - | - | - | - | - | - | - | 277 V | - | - | |
|
Littelfuse Inc.
|
11
|
Price on request
11
|
Rocker | CCC, CSA, TUV, UL489 | Magnetic (Hydraulic Delay) | - | 2.5A | - | None | - | - | - | - | Panel Mount | 2 | - | - | - | - | - | - | - | 240 V | - | - | |
TE Connectivity
|
11
|
Price on request
11
|
Toggle | - | Thermal | - | 7.5A | - | - | - | - | - | - | Panel Mount | 1 | - | - | - | - | - | - | - | 240 V | - | - | |
OptiFuse
|
10
|
Price on request
10
|
Automatic Reset | SAEJ553, UL | - | - | 6A | - | None | - | - | - | - | - | 1 | - | - | - | - | - | - | - | 14 V | - | - |
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