Request Quote
(Ships tomorrow)
CMB-103-11CNN-W-D Equivalent & Substitute Parts
Part Overview
The CMB-103-11CNN-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. The breaker is designed for overcurrent protection in industrial and commercial applications requiring thermal response characteristics.
Substitute parts are necessary when the original manufacturer part becomes unavailable, when supply chain constraints limit access to the primary component, or when design flexibility permits selection from qualified alternative manufacturers meeting identical electrical and mechanical specifications.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| 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 |
| RoHS Status | ROHS3 Compliant |
Substitute Part Grouping Explanation
Substitution of the CMB-103-11CNN-W-D is permissible with OptiFuse CBW57 series thermal circuit breakers that maintain 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
- RoHS Status: ROHS3 Compliant
Allowable Variance:
- Voltage Rating - DC: The CMB-103-11CNN-W-D operates at 32V DC. All listed OptiFuse CBW57 substitutes operate at 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 base product series and maintain Active product status with equivalent regulatory approvals under UL 1077 and UL 1500 standards.
Parameter Comparison
| Parameter | CMB-103-11CNN-W-D (Carling) | CBW57-EJ-10A (OptiFuse) | CBW57-EL4-10A (OptiFuse) | CBW57-ES-10A-5H (OptiFuse) | CBW57-PB-10A-5X (OptiFuse) | CBW57-PB-10A-X (OptiFuse) | CBW57-PF-10A-5X (OptiFuse) | CBW57-PL-10A-5X (OptiFuse) | CBW57-PS-10A (OptiFuse) | CBW57-PS-10A-1X (OptiFuse) | CBW57-PS-10A-5X (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 |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| Product Status | Active | Active | Active | Active | Active | Active | Active | Active | Active | Active | Active |
Engineering Selection Recommendations
All listed OptiFuse CBW57 series substitutes maintain Active product status and comply with regulatory standards including UL 1077 and UL 1500 certifications. The CBW57-PS-10A-5X variant offers the highest inventory availability at 5,818 pieces, followed by CBW57-PS-10A at 4,730 pieces, making these options suitable for high-volume procurement requirements.
The CBW57-ES-10A-5H provides 3,044 pieces in stock, while CBW57-PL-10A-5X, CBW57-PF-10A-5X, CBW57-PB-10A-5X, and CBW57-PB-10A-X each maintain inventory levels between 1,040 and 1,156 pieces. CBW57-EL4-10A and CBW57-PS-10A-1X provide 1,012 and 701 pieces respectively.
All substitutes are ROHS3 compliant and REACH unaffected, meeting environmental regulatory requirements equivalent to the original CMB-103-11CNN-W-D component. Selection among available variants should be based on specific application requirements, connector interface specifications, and procurement lead time constraints.
Frequently Asked Questions (FAQ)
Q: Can OptiFuse CBW57 series breakers directly replace the Carling CMB-103-11CNN-W-D?
A: Yes. All listed OptiFuse CBW57 variants maintain identical electrical specifications for current rating (10A), AC voltage (250V), mounting configuration (panel mount), actuation method (push to reset), and pole count (1). The higher DC voltage rating (50V versus 32V) on OptiFuse parts represents increased capability and does not prevent substitution in 32V DC applications.
Q: What is the significance of the DC voltage difference between the CMB-103-11CNN-W-D (32V DC) and CBW57 substitutes (50V DC)?
A: The CBW57 series operates at a higher DC voltage rating of 50V, which indicates greater voltage withstand capability. This higher rating is compatible with applications requiring 32V DC operation. The breaker will function correctly in circuits operating at or below its rated voltage.
Q: Are all CBW57 variants electrically interchangeable?
A: All listed CBW57 variants share identical electrical parameters: 10A current rating, 250V AC, 50V DC, thermal breaker type, push-to-reset actuation, and single-pole configuration. Differences in part number suffixes (such as -PS, -PF, -PL, -PB, -EJ, -EL4, -ES) indicate variations in connector interface, terminal configuration, or packaging specifications rather than electrical performance.
Q: What regulatory certifications apply to these substitute parts?
A: All OptiFuse CBW57 substitutes carry certifications under UL 1077 and UL 1500 standards, with additional approvals including cURus, IP 40, and SAE J1171. These certifications are equivalent to the original CMB-103-11CNN-W-D approvals under CE, cUL, TUV, UL1077, and UL1500.
Q: Which CBW57 variant should be selected for maximum inventory availability?
A: CBW57-PS-10A-5X provides the highest inventory level at 5,818 pieces, followed by CBW57-PS-10A at 4,730 pieces. These variants are recommended for applications requiring immediate availability or high-volume procurement.
Q: Are there any environmental compliance differences between the original and substitute parts?
A: No. Both the CMB-103-11CNN-W-D and all CBW57 substitutes are ROHS3 compliant and REACH unaffected, meeting identical environmental regulatory requirements.
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