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CMB-103-12HNN-W-D Equivalent & Substitute Parts
Part Overview
The CMB-103-12HNN-W-D 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 part is RoHS3 compliant and REACH unaffected. Substitute parts are necessary to address supply chain requirements, inventory availability, or specific application constraints while maintaining equivalent electrical and mechanical performance.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | CMB-103-12HNN-W-D |
| 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 |
Substitute Part Grouping Explanation
Substitution of the CMB-103-12HNN-W-D is determined by strict equivalence across the following critical parameters:
Mandatory Matching Parameters:
- 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 Variation:
- Voltage Rating - DC: The main part specifies 32V DC. Substitute parts rated at 50V DC are acceptable as this represents a higher voltage capability and maintains backward compatibility in applications requiring 32V DC operation.
All substitute parts listed are from the OptiFuse CBW57 series and maintain active product status with RoHS3 compliance and REACH unaffected designation. Approval agencies differ between the main part and substitutes but both sets include UL1077 and UL1500 certifications.
Parameter Comparison
| Parameter | CMB-103-12HNN-W-D (Main) | 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 |
Engineering Selection Recommendations
All listed substitute parts from the OptiFuse CBW57 series are functionally equivalent to the CMB-103-12HNN-W-D for applications requiring 10A thermal circuit protection at 250V AC. The primary distinction is the DC voltage rating: substitute parts are rated for 50V DC compared to the main part's 32V DC specification. This higher DC rating provides enhanced capability and does not restrict use in 32V DC applications.
Compliance Considerations:
The main part CMB-103-12HNN-W-D carries approvals from CE, cUL, TUV, UL1077, and UL1500. Substitute parts carry approvals from cURus, IP 40, SAE J1171, UL1077, and UL1500. Both sets include UL1077 and UL1500 certifications, which are the primary standards for thermal circuit breakers. Applications requiring specific regional certifications (CE, TUV) should reference the approval agency requirements of the target market.
Inventory Availability:
The main part has 807 units in stock. Substitute parts range from 701 to 5,818 units in stock, with CBW57-PS-10A-5X offering the highest availability at 5,818 units.
Product Status:
All parts maintain active product status, ensuring continued manufacturer support and availability.
Frequently Asked Questions (FAQ)
Q: Can OptiFuse CBW57 series parts directly replace the Carling Technologies CMB-103-12HNN-W-D?
A: Yes. All listed OptiFuse CBW57 parts are parametric equivalents with matching current rating (10A), AC voltage rating (250V), mounting type (panel mount), actuator type (push to reset), pole count (1), and illumination status (none). The DC voltage rating difference (50V versus 32V) represents a higher capability and maintains compatibility with 32V DC applications.
Q: What is the significance of the DC voltage rating difference?
A: The main part is rated for 32V DC operation. Substitute parts are rated for 50V DC. A higher DC voltage rating indicates the component can safely operate at higher DC voltages without degradation. Applications requiring 32V DC operation are fully supported by 50V DC-rated components.
Q: Are there differences in approval agencies between the main part and substitutes?
A: Yes. The main part carries CE, cUL, TUV, UL1077, and UL1500 approvals. Substitute parts carry cURus, IP 40, SAE J1171, UL1077, and UL1500 approvals. Both include UL1077 and UL1500 certifications. Applications requiring CE or TUV certification should confirm the substitute part meets regional requirements.
Q: What do the different part number suffixes in the CBW57 series indicate?
A: The suffixes (such as -EJ, -EL4, -ES, -PB, -PF, -PL, -PS) represent different connector or terminal configurations within the CBW57 series. All variants listed maintain identical electrical specifications and thermal protection characteristics.
Q: Are all substitute parts RoHS3 compliant?
A: Yes. All substitute parts in the CBW57 series are RoHS3 compliant and REACH unaffected, matching the environmental compliance status of the main part.
Q: Which substitute part should be selected for maximum inventory availability?
A: CBW57-PS-10A-5X offers the highest inventory level at 5,818 units in stock. CBW57-PS-10A and CBW57-PS-10A-1X also provide strong availability at 4,730 and 701 units respectively.
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