# CMB-043-27JNN-W-A/04 - Littelfuse Inc. Circuit Breaker

## Product Summary

Thermal circuit breaker rated 4A, 250V, 1-pole with push-to-reset actuation. Panel mount.

## Product Information

| Field | Value |
| --- | --- |
| Part Number | CMB-043-27JNN-W-A/04 |
| Manufacturer | Littelfuse Inc. |
| Product Type | Circuit Breaker |
| Category | Circuit Protection |
| Subcategory | Thermal Circuit Breaker |
| Mounting Type | Panel Mount |

## Description

This Littelfuse CMB-043-27JNN-W-A/04 is a single-pole thermal circuit breaker designed for overcurrent protection. It has a current rating of 4A and a voltage rating of 250V, featuring a push-to-reset actuator. The device is panel mounted and is non-illuminated. It carries multiple safety approvals including CE, cUL, TUV, UL1077, and UL1500, making it suitable for a variety of industrial and marine applications. The thermal breaker mechanism provides reliable protection against sustained overloads by tripping when current exceeds the rated value for a period.

## Key Specifications

| Specification | Value |
| --- | --- |
| Actuator Type | Push to Reset |
| Approval Agency | CE, cUL, TUV, UL1077, UL1500 |
| Breaker Type | Thermal |
| Current Rating | 4 A |
| Current Rating (Amps) | 4 A |
| Illumination | None |
| Mounting Type | Panel Mount |
| Number of Poles | 1 |
| Voltage Rating | 250 V |

## Availability and Pricing

| Field | Value |
| --- | --- |
| Stock Status | Stock on Request |
| Distributor Count | 0 |
| Total Stock | 0 |
| Pricing Available | No |

## Features

- Rated for 4A continuous current at 250VAC.
- Single-pole thermal circuit breaker.
- Push-to-reset actuator design.
- Panel mount installation.
- Approved to CE, cUL, TUV, UL1077, UL1500.

## Applications

- Used for overcurrent protection in power supplies.
- Ideal for appliance and industrial control panels.
- Suitable for low-voltage circuit protection.
- Common in automotive and marine applications.
- Protects wiring and components from overloads.

## Compliance

| Field | Value |
| --- | --- |
| RoHS Status | RoHS3 Compliant |
| REACH Status | REACH Unaffected |
| Moisture Sensitivity Level | 1 Unlimited |

## Documents and Media

- Product Page: https://distyparts.com/product/cmb-043-27jnn-w-a-04
- RFQ URL: https://distyparts.com/product/cmb-043-27jnn-w-a-04#rfq

## FAQs

### What is the current rating of this circuit breaker?

4A.

### What is the voltage rating?

250V.

### What type of circuit breaker is this?

Thermal.

### How many poles does it have?

1.

### What is the actuator type?

Push to reset.

### What approvals does this circuit breaker have?

CE, cUL, TUV, UL1077, UL1500.

### What is the mounting type?

Panel mount.

## Related Pages

- Manufacturer: https://distyparts.com/manufacturer/littelfuse-inc
- Category: https://distyparts.com/category/circuit-protection/circuit-breakers
- Product Page: https://distyparts.com/product/cmb-043-27jnn-w-a-04
- Markdown File: https://distyparts.com/product/cmb-043-27jnn-w-a-04.md
- TXT File: https://distyparts.com/product/cmb-043-27jnn-w-a-04.txt