Request Quote
(Ships tomorrow)
CMB-103-11DNB-B-A Equivalent & Substitute Parts
Part Overview
The CMB-103-11DNB-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. The component is ROHS3 compliant and carries multiple approval agencies including CE, cUL, TUV, UL1077, and UL1500.
Substitute parts are necessary when the primary component becomes unavailable due to inventory constraints, supply chain disruptions, or manufacturing discontinuation. Equivalent alternatives must maintain identical electrical ratings, mechanical mounting characteristics, and functional performance to ensure direct interchangeability without circuit redesign.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | CMB-103-11DNB-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 |
| Product Status | Active |
| RoHS Status | ROHS3 Compliant |
Substitute Part Grouping Explanation
Substitution eligibility for the CMB-103-11DNB-B-A is determined by 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
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 circuits designed for 32V DC operation.
All identified substitute parts are manufactured by OptiFuse and belong to the CBW57 series. Each substitute maintains the mandatory electrical and mechanical parameters while offering equivalent functional performance in thermal circuit protection applications.
Parameter Comparison
| Parameter | CMB-103-11DNB-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 |
| 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 maintain Active product status and ROHS3 compliance, ensuring long-term availability and regulatory alignment with the original CMB-103-11DNB-B-A component.
Approval Agency Considerations:
The CMB-103-11DNB-B-A carries approvals from CE, cUL, TUV, UL1077, and UL1500. OptiFuse CBW57 series substitutes carry approvals from cURus, IP 40, SAE J1171, UL 1077, and UL 1500. Both component families satisfy UL1077 and UL1500 standards, which are primary certifications for thermal circuit breaker applications.
Inventory Availability:
OptiFuse CBW57-PS-10A-5X offers the highest inventory level at 5,818 pieces, followed by CBW57-PS-10A at 4,730 pieces. These variants provide optimal supply chain security for high-volume applications or long-term procurement planning.
DC Voltage Rating Enhancement:
All OptiFuse substitutes are rated for 50V DC compared to the original 32V DC specification. This higher DC rating provides additional design margin in applications operating at or below 32V DC, with no derating required for direct substitution.
Frequently Asked Questions (FAQ)
Q: Can OptiFuse CBW57 series parts directly replace the Carling Technologies CMB-103-11DNB-B-A?
A: Yes. All listed OptiFuse CBW57 variants are direct substitutes. They maintain identical current ratings (10A), AC voltage ratings (250V), mounting configuration (panel mount), actuation method (push to reset), and pole count (1). The higher DC voltage rating (50V versus 32V) does not prevent substitution in circuits designed for 32V DC operation.
Q: What is the significance of the higher 50V DC rating on OptiFuse parts?
A: The 50V DC rating on CBW57 series components represents an enhanced voltage capability. In applications operating at 32V DC or lower, this higher rating provides additional safety margin and is fully compatible with the original circuit design. No circuit modifications are required.
Q: Are there differences in approval agencies between the main part and substitutes?
A: The CMB-103-11DNB-B-A carries CE, cUL, TUV, UL1077, and UL1500 approvals. OptiFuse CBW57 variants carry cURus, IP 40, SAE J1171, UL 1077, and UL 1500 approvals. Both families satisfy UL1077 and UL1500 standards, which are the primary certifications for thermal circuit breaker functionality. The substitutes meet the core regulatory requirements for this component category.
Q: Which OptiFuse variant should be selected for maximum inventory availability?
A: CBW57-PS-10A-5X provides the highest inventory level at 5,818 pieces. CBW57-PS-10A is the second option with 4,730 pieces available. Both variants are suitable for applications requiring extended supply chain security.
Q: Do all substitute parts have identical packaging?
A: All OptiFuse CBW57 series substitutes are supplied in Bulk packaging. The original CMB-103-11DNB-B-A does not specify packaging type in the provided data. Bulk packaging is standard for thermal circuit breaker distribution and is compatible with standard assembly and procurement workflows.
Q: Are there any mechanical mounting differences between the main part and substitutes?
A: No. All components are specified as panel-mount devices with push-to-reset actuation and single-pole configuration. Mechanical interchangeability is confirmed across all listed parts.
Q: What is the MSL rating for OptiFuse substitutes?
A: OptiFuse CBW57 series components carry MSL 1 (Unlimited) moisture sensitivity level, indicating no moisture sensitivity restrictions for storage, handling, or assembly processes.
Alternative Parts
SJ6012L2TP
Littelfuse Inc.
6 Alternative Parts
JMK107BBJ476MA-RE
Taiyo Yuden
10 Alternative Parts
GMK107BBJ475MA-T
Taiyo Yuden
5 Alternative Parts
SJ6020N2ARP
Littelfuse Inc.
3 Alternative Parts
SJ6025R2ATP
Littelfuse Inc.
4 Alternative Parts
2474-05L
API Delevan Inc.
1 Alternative Parts
4590R-684K
API Delevan Inc.
1 Alternative Parts
CM6560R-334
API Delevan Inc.
1 Alternative Parts
CM6460-104
API Delevan Inc.
1 Alternative Parts
5526-12
API Delevan Inc.
1 Alternative Parts