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CMB-103-11CNN-B-A Equivalent & Substitute Parts
Part Overview
The CMB-103-11CNN-B-A 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. The component is RoHS3 compliant and REACH unaffected. Substitute parts are identified to address inventory availability, supply chain continuity, and equivalent functional performance in applications requiring thermal circuit protection.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | CMB-103-11CNN-B-A |
| Manufacturer | Carling Technologies |
| Series | CMB |
| Breaker Type | Thermal |
| Current Rating | 10A |
| Voltage Rating - AC | 250V |
| Voltage Rating - DC | 32V |
| Mounting Type | Panel Mount |
| Actuator Type | Push to Reset |
| Number of Poles | 1 |
| Illumination | None |
| Product Status | Active |
| RoHS Status | ROHS3 Compliant |
| REACH Status | REACH Unaffected |
Substitute Part Grouping Explanation
Substitute parts for the CMB-103-11CNN-B-A are qualified based on the following critical parameters that determine functional equivalence:
Matching Parameters (Required for Substitution):
- Current Rating: 10A
- Voltage Rating - AC: 250V
- Mounting Type: Panel Mount
- Breaker Type: Thermal
- Actuator Type: Push to Reset
- Number of Poles: 1
- Illumination: None
Allowable Variance:
- Voltage Rating - DC: The main part specifies 32V DC. Substitute parts from OptiFuse (CBW57 series) are rated for 50V DC, which represents a higher voltage capability and is acceptable for applications requiring 32V DC operation.
All substitute parts are manufactured by OptiFuse under the CBW57 series designation. Each substitute maintains identical AC voltage rating, current rating, mounting configuration, and actuation method. The DC voltage rating increase in substitute parts provides enhanced capability without compromising compatibility in 32V DC applications.
Parameter Comparison
| Parameter | CMB-103-11CNN-B-A | 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 |
| Breaker Type | Thermal | Thermal | Thermal | Thermal | Thermal | Thermal | Thermal | Thermal | Thermal | Thermal | Thermal |
| 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 |
| 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 |
| Number of Poles | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Illumination | None | None | None | None | None | None | None | None | None | None | None |
| 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 with REACH unaffected designation, matching the regulatory posture of the CMB-103-11CNN-B-A. The OptiFuse CBW57 series substitutes carry approval certifications including cURus, IP 40, SAE J1171, UL 1077, and UL 1500, providing equivalent or enhanced compliance coverage for thermal circuit protection applications.
The primary technical distinction between the main part and substitutes is the DC voltage rating: the CMB-103-11CNN-B-A operates at 32V DC, while all CBW57 series alternatives are rated for 50V DC. This higher DC rating in substitute parts ensures compatibility with the original 32V DC specification while providing additional operational margin. The 10A current rating, 250V AC voltage rating, panel-mount configuration, push-to-reset actuation, and single-pole design remain constant across all parts.
Selection among the CBW57 substitute variants should be based on specific connector or terminal configurations required by the application, as part number suffixes (such as -EJ, -EL4, -ES, -PB, -PF, -PL, -PS) denote different mechanical interface options. All variants maintain identical electrical performance characteristics.
Frequently Asked Questions (FAQ)
Q: Can CBW57 series parts directly replace the CMB-103-11CNN-B-A?
A: Yes. All CBW57 series parts listed are direct functional equivalents. They maintain identical current rating (10A), AC voltage rating (250V), mounting type (panel mount), actuation method (push to reset), and pole configuration (single pole). The DC voltage rating increase from 32V to 50V in substitute parts is compatible with 32V DC applications.
Q: What is the significance of the different CBW57 part number suffixes?
A: The suffixes denote different terminal or connector configurations. Examples include -EJ, -EL4, -ES-5H, -PB-5X, -PB-X, -PF-5X, -PL-5X, -PS, -PS-1X, and -PS-5X. These variations address different mechanical interface requirements while maintaining identical electrical specifications. Selection should be based on the specific terminal type required by the application circuit board or panel assembly.
Q: Are all substitute parts RoHS3 compliant?
A: Yes. All CBW57 series substitute parts are RoHS3 compliant and REACH unaffected, matching the environmental compliance status of the CMB-103-11CNN-B-A.
Q: What certifications do the substitute parts carry?
A: CBW57 series parts carry cURus, IP 40, SAE J1171, UL 1077, and UL 1500 certifications. The original CMB-103-11CNN-B-A carries CE, cUL, TUV, UL1077, and UL1500 certifications. Both sets of parts meet UL 1077 and UL 1500 standards for thermal circuit breaker applications.
Q: Is the higher DC voltage rating of substitute parts a concern?
A: No. A higher voltage rating indicates greater capability and does not compromise performance in lower-voltage applications. The 50V DC rating of CBW57 parts is fully compatible with 32V DC operation.
Q: Which substitute part should be selected if the original part is unavailable?
A: Selection depends on the specific terminal configuration required by the application. All CBW57 variants provide equivalent electrical performance. Consult the application's mechanical interface requirements to determine the appropriate suffix designation.
Q: Are substitute parts available in equivalent quantities?
A: Inventory levels vary by part number variant. CBW57-PS-10A-5X maintains the highest inventory at 5,818 pieces, while other variants range from 701 to 4,730 pieces. Availability should be confirmed for the specific variant required.
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