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CMB-103-11CNN-B-A/10 Equivalent & Substitute Parts
Part Overview
The CMB-103-11CNN-B-A/10 is a thermal circuit breaker manufactured by Carling Technologies, rated for 10A at 250V AC and 32V DC. This single-pole, panel-mount device features push-to-reset actuation and holds Active product status with full compliance to CE, cUL, TUV, UL1077, and UL1500 standards. Substitute parts are necessary when primary inventory is unavailable, when alternative mounting configurations are required, or when sourcing from secondary manufacturers is preferred while maintaining equivalent electrical and mechanical performance.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | CMB-103-11CNN-B-A/10 |
| Manufacturer | Carling Technologies |
| Series | CMB |
| Breaker Type | Thermal |
| Current Rating | 10A |
| Voltage Rating - AC | 250V |
| Voltage Rating - DC | 32V |
| Mounting Type | Panel Mount |
| Number of Poles | 1 |
| Actuator Type | Push to Reset |
| Product Status | Active |
| RoHS Status | ROHS3 Compliant |
| REACH Status | REACH Unaffected |
Substitute Part Grouping Explanation
Substitute parts for the CMB-103-11CNN-B-A/10 are qualified based on the following critical parameters that must match or exceed the original specification:
Mandatory Matching Parameters:
- Current Rating: 10A
- Voltage Rating - AC: 250V
- Mounting Type: Panel Mount
- Number of Poles: 1
- Breaker Type: Thermal
- Actuator Type: Push to Reset
Allowable Variation:
- Voltage Rating - DC: The CMB-103-11CNN-B-A/10 is rated for 32V DC. All qualified substitutes from OptiFuse's CBW57 series are rated for 50V DC, which exceeds the original specification and is therefore acceptable for direct substitution in applications requiring 32V DC operation.
All substitute parts listed are manufactured by OptiFuse under the CBW57 series designation. Each substitute maintains Active product status, ROHS3 compliance, and equivalent approval agency certifications (cURus, UL 1077, UL 1500). The CBW57 series substitutes differ only in connector or terminal configuration variants, which do not affect electrical performance or compatibility in standard panel-mount applications.
Parameter Comparison
| Parameter | CMB-103-11CNN-B-A/10 | CBW57-EJ-10A | CBW57-EL4-10A | CBW57-ES-10A-5H | CBW57-PB-10A-5X | CBW57-PB-10A-X | CBW57-PF-10A-5X | CBW57-PL-10A-5X | CBW57-PS-10A | CBW57-PS-10A-1X | CBW57-PS-10A-5X |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Manufacturer | Carling Technologies | OptiFuse | OptiFuse | OptiFuse | OptiFuse | OptiFuse | OptiFuse | OptiFuse | OptiFuse | OptiFuse | OptiFuse |
| Current Rating (Amps) | 10A | 10A | 10A | 10A | 10A | 10A | 10A | 10A | 10A | 10A | 10A |
| Voltage Rating - AC | 250V | 250V | 250V | 250V | 250V | 250V | 250V | 250V | 250V | 250V | 250V |
| Voltage Rating - DC | 32V | 50V | 50V | 50V | 50V | 50V | 50V | 50V | 50V | 50V | 50V |
| Mounting Type | Panel Mount | Panel Mount | Panel Mount | Panel Mount | Panel Mount | Panel Mount | Panel Mount | Panel Mount | Panel Mount | Panel Mount | Panel Mount |
| Breaker Type | Thermal | Thermal | Thermal | Thermal | Thermal | Thermal | Thermal | Thermal | Thermal | Thermal | Thermal |
| Number of Poles | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Actuator Type | Push to Reset | Push to Reset | Push to Reset | Push to Reset | Push to Reset | Push to Reset | Push to Reset | Push to Reset | Push to Reset | Push to Reset | Push to Reset |
| Product Status | Active | Active | Active | Active | Active | Active | Active | Active | Active | Active | Active |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| REACH Status | REACH Unaffected | REACH Unaffected | REACH Unaffected | REACH Unaffected | REACH Unaffected | REACH Unaffected | REACH Unaffected | REACH Unaffected | REACH Unaffected | REACH Unaffected | REACH Unaffected |
Engineering Selection Recommendations
All listed substitute parts maintain Active product status and full ROHS3 compliance. The CBW57 series from OptiFuse carries approval certifications including cURus, IP 40, SAE J1171, UL 1077, and UL 1500, which overlap with and satisfy the regulatory requirements of the original CMB-103-11CNN-B-A/10 (CE, cUL, TUV, UL1077, UL1500).
The primary distinction among substitute options lies in terminal or connector configuration, designated by the suffix codes (EJ, EL4, ES, PB, PF, PL, PS variants). These configuration differences do not alter electrical performance or thermal trip characteristics. Selection among the CBW57 variants should be based on mechanical interface requirements specific to the application's panel layout and wiring harness compatibility.
The elevated DC voltage rating (50V versus 32V) in all OptiFuse substitutes provides enhanced margin for DC applications and does not introduce incompatibility with 32V DC circuits. All substitutes are suitable for direct electrical replacement in applications currently using the CMB-103-11CNN-B-A/10.
Frequently Asked Questions (FAQ)
Q: Can CBW57 series circuit breakers directly replace the CMB-103-11CNN-B-A/10?
A: Yes. All listed CBW57 variants meet or exceed the electrical specifications of the CMB-103-11CNN-B-A/10. The 10A current rating, 250V AC voltage rating, panel-mount configuration, single-pole design, and push-to-reset actuation are identical. The higher DC voltage rating (50V versus 32V) in the CBW57 series is acceptable for applications requiring 32V DC operation.
Q: What is the difference between the various CBW57 part numbers (EJ, EL4, ES, PB, PF, PL, PS)?
A: The suffix designations indicate different terminal or connector configurations. These mechanical variants do not affect electrical performance, current rating, voltage rating, or thermal trip behavior. Selection should be based on the specific terminal type required by your panel assembly or wiring harness.
Q: Are all substitute parts ROHS3 compliant?
A: Yes. All listed CBW57 substitutes are ROHS3 compliant and REACH unaffected, matching the environmental compliance status of the original CMB-103-11CNN-B-A/10.
Q: Do the substitute parts carry the same regulatory approvals?
A: The CBW57 series carries cURus, UL 1077, and UL 1500 certifications, which satisfy the primary regulatory requirements of the original part. The CBW57 series also includes IP 40 and SAE J1171 approvals, providing additional certification coverage for specific applications.
Q: Which CBW57 variant has the highest inventory availability?
A: CBW57-PS-10A-5X maintains the highest inventory level at 5,818 pieces. CBW57-PS-10A provides 4,730 pieces. Both variants are suitable for general-purpose panel-mount thermal circuit breaker applications.
Q: Is the DC voltage difference between 32V and 50V significant for my application?
A: The 50V DC rating in the CBW57 series exceeds the 32V DC requirement of the original part. This higher rating provides additional safety margin and does not create incompatibility. If your application operates at 32V DC or lower, the CBW57 substitutes are fully suitable.
Q: Can I use these substitutes in equipment originally designed for the CMB-103-11CNN-B-A/10?
A: Yes, provided the terminal configuration of your selected CBW57 variant matches your panel's mechanical interface. The electrical performance and thermal protection characteristics are equivalent across all listed substitutes.
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