3120-N521-P7T1-W02D-12A The E-T-A 3120-N521-P7T1-W02D-12A is a 2-pole thermal circuit breaker designed for overcurrent protection. It features a 12A current rating and a 240V AC / 50V DC voltage rating.
Mfr Part #:

3120-N521-P7T1-W02D-12A

Mfr Name: ETA
ETA
The E-T-A 3120-N521-P7T1-W02D-12A is a 2-pole thermal circuit breaker designed for overcurrent protection. It features a 12A current rating and a 240V AC / 50V DC voltage rating.
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3120-N521-P7T1-W02D-12A Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Actuator Type
Approval Agency
Breaker Type
Current Rating
Current Rating (Amps)
Illumination
Mounting Type
Number of Poles
Voltage Rating

3120-N521-P7T1-W02D-12A Description

Short technical summary and product information.

The E-T-A 3120-N521-P7T1-W02D-12A is a thermal circuit breaker that combines overcurrent protection with the function of an ON/OFF switch. It utilizes a bimetal trip element and is suitable for overload protection of motors, pumps, transformers, and cables.

 

This 2-pole breaker has a current rating of 12A and operates at AC 240V or DC 50V. It is designed for panel mounting and features a rocker actuator. The device is approved by CSA, GB, IEC, and UL standards.

 

Key features include a positively trip-free mechanism for reliable disconnection and quick resettability, ensuring maximum equipment availability. Its compact design and optional push-in terminals facilitate reduced mounting and wiring time. The series is also available with thermal-magnetic trip options and functional extensions like low voltage release or auxiliary contacts.

 

Typical applications include medical and laboratory equipment, apparatus and machine construction, professional tools, household and garden appliances, office machines, audio equipment, and machine tools.

3120-N521-P7T1-W02D-12A Quick Information

Product Type: Thermal Circuit Breaker
Series: 3120-N
Canonical Name: E-T-A 3120-N521-P7T1-W02D-12A Thermal Circuit Breaker
Subcategory: Thermal Circuit Breaker

3120-N521-P7T1-W02D-12A Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected

3120-N521-P7T1-W02D-12A Features

  • Combines overcurrent protection and ON/OFF switch.
  • Thermal trip element with bimetal mechanism.
  • Rated for 12A current and 240V AC / 50V DC.
  • 2-pole configuration for versatile circuit protection.
  • Panel mount with rocker actuator for easy operation.

3120-N521-P7T1-W02D-12A Applications

  • Ideal for motor and pump overload protection.
  • Suitable for transformer and cable protection.
  • Used in medical and laboratory equipment.
  • Applicable in machine construction and tools.
  • Designed for household and office appliances.

3120-N521-P7T1-W02D-12A FAQs

7 frequently asked questions generated from this part’s specifications.
What is the current rating of the E-T-A 3120-N521-P7T1-W02D-12A?

The current rating is 12A.

What are the voltage ratings for this thermal circuit breaker?

It is rated for AC 240 V and DC 50 V.

How many poles does the E-T-A 3120-N521-P7T1-W02D-12A have?

This circuit breaker has 2 poles.

What type of breaker is the 3120-N521-P7T1-W02D-12A?

It is a thermal circuit breaker.

What is the mounting type for this E-T-A circuit breaker?

It is designed for panel mounting.

What is the RoHS status of this component?

The RoHS status is RoHS3 Compliant.

What is the Moisture Sensitivity Level (MSL) for this part?

The MSL is 1 Unlimited.

3120-N521-P7T1-W02D-12A Alternate Parts

Same form/fit/function or matching attribute configuration across different manufacturers.
View All Alternate Parts
3120-N321-P7T1-W01X-12A
3120-N321-P7T1-W01X-12A
ETA
The E-T-A 3120-N321-P7T1-W01X-12A is a 2-pole thermal circuit breaker designed for overcurrent protection. It features a 12A current rating and panel mount.
View Part
3120-N321-P7T1-W02D-12A
3120-N321-P7T1-W02D-12A
ETA
The E-T-A 3120-N Series is a 2-pole thermal circuit breaker designed for overload protection. It features a 12A current rating and panel mount capability.
View Part
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