| Category | |
| Manufacturer Name | |
| AEC Qualified | |
| Actuator Type | |
| Approval Agency | |
| Automotive Grade | |
| Breaker Type | |
| Current Rating | |
| Current Rating (Amps) | |
| Halogen Free | |
| Illumination | |
| Industrial Grade | |
| Medical Grade | |
| Military Grade | |
| Mounting Type | |
| Number of Poles | |
| SVHC Present | |
| Voltage Rating |
The CMB-033-28KNN-W-A is a thermal circuit breaker from Littelfuse designed for overcurrent protection. It is rated for 3A continuous current at 250V AC or DC. The breaker features a single-pole configuration with a push-to-reset actuator, making it suitable for applications requiring manual reset after a fault.
This thermal breaker uses a bimetallic strip that heats and trips when current exceeds the rated value. It is panel mount, allowing secure installation in control panels, power distribution units, and equipment enclosures. The unit is not illuminated and has a simple, rugged design for reliable operation.
Compliance certifications include CE, cUL, TUV, UL1077, and UL1500, indicating suitability for North American and European markets. The product is RoHS3 compliant and REACH unaffected, though these claims are unverified. The moisture sensitivity level is MSL 1, indicating unlimited floor life.
Typical applications include overcurrent protection in power supplies, industrial controls, and automotive systems. The push-to-reset actuator ensures the breaker remains off after tripping until manually reset, preventing automatic reclosure.
250V.
3A.
Thermal breaker.
Push to reset.
1 pole.
Panel mount.
CE, cUL, TUV, UL1077, UL1500.