CMB-103-11CNN-R-A Equivalent & Substitute Parts

Part Overview

The CMB-103-11CNN-R-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 is designed for overcurrent protection in industrial and commercial applications. The part maintains active product status with full compliance to CE, cUL, TUV, UL1077, and UL1500 standards. Substitute parts are identified to provide alternative sourcing options when the primary part is unavailable or when design flexibility permits equivalent component selection.

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

Substitute parts for the CMB-103-11CNN-R-A are qualified based on electrical and mechanical parameter equivalence. All identified substitutes maintain the following critical specifications:

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
RoHS3 Compliance

Parameter Variance: The substitute parts from OptiFuse (CBW57 series) operate at 50V DC, compared to the main part's 32V DC rating. This represents an increased DC voltage capability and does not restrict application in circuits operating at or below 32V DC.

All substitute parts carry active product status and maintain ROHS3 compliance with REACH Unaffected designation, ensuring regulatory alignment with the original component.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Current Rating (A)	Voltage AC (V)	Voltage DC (V)	Mounting Type	Breaker Type	Actuator Type	Poles	RoHS Status	Product Status
CMB-103-11CNN-R-A	Carling Technologies	10	250	32	Panel Mount	Thermal	Push to Reset	1	ROHS3 Compliant	Active
CBW57-EJ-10A	OptiFuse	10	250	50	Panel Mount	Thermal	Push to Reset	1	ROHS3 Compliant	Active
CBW57-EL4-10A	OptiFuse	10	250	50	Panel Mount	Thermal	Push to Reset	1	ROHS3 Compliant	Active
CBW57-ES-10A-5H	OptiFuse	10	250	50	Panel Mount	Thermal	Push to Reset	1	ROHS3 Compliant	Active
CBW57-PB-10A-5X	OptiFuse	10	250	50	Panel Mount	Thermal	Push to Reset	1	ROHS3 Compliant	Active
CBW57-PB-10A-X	OptiFuse	10	250	50	Panel Mount	Thermal	Push to Reset	1	ROHS3 Compliant	Active
CBW57-PF-10A-5X	OptiFuse	10	250	50	Panel Mount	Thermal	Push to Reset	1	ROHS3 Compliant	Active
CBW57-PL-10A-5X	OptiFuse	10	250	50	Panel Mount	Thermal	Push to Reset	1	ROHS3 Compliant	Active
CBW57-PS-10A	OptiFuse	10	250	50	Panel Mount	Thermal	Push to Reset	1	ROHS3 Compliant	Active
CBW57-PS-10A-1X	OptiFuse	10	250	50	Panel Mount	Thermal	Push to Reset	1	ROHS3 Compliant	Active
CBW57-PS-10A-5X	OptiFuse	10	250	50	Panel Mount	Thermal	Push to Reset	1	ROHS3 Compliant	Active

Engineering Selection Recommendations

All identified substitute parts maintain active product status and ROHS3 compliance, ensuring regulatory continuity with the CMB-103-11CNN-R-A. The OptiFuse CBW57 series components carry equivalent certifications including cURus, UL 1077, and UL 1500 standards, supporting direct substitution in applications requiring thermal circuit protection.

The primary distinction between the main part and substitutes is the DC voltage rating: the CMB-103-11CNN-R-A operates at 32V DC, while all CBW57 series alternatives operate at 50V DC. This increased DC rating in substitute parts does not restrict their use in circuits designed for 32V DC operation, as the higher rating provides additional margin.

Selection among the CBW57 variants should be based on specific connector or terminal configuration requirements, as indicated by the suffix designations (EJ, EL4, ES, PB, PF, PL, PS). All variants maintain identical electrical performance characteristics for the 10A, 250V AC thermal protection function.

Frequently Asked Questions (FAQ)

Q: Can CBW57 series parts directly replace the CMB-103-11CNN-R-A?

A: Yes. All CBW57 variants listed maintain the same current rating (10A), AC voltage rating (250V), mounting configuration (panel mount), breaker type (thermal), and actuation method (push to reset). The increased DC voltage rating (50V versus 32V) does not prevent substitution in 32V DC applications.

Q: What do the suffix designations in CBW57 part numbers indicate?

A: The suffixes (EJ, EL4, ES, PB, PF, PL, PS, and their modifiers like 5X, 5H, 1X) denote specific connector, terminal, or packaging configurations. Electrical performance remains constant across all variants for the 10A rating.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All identified CBW57 series substitutes carry ROHS3 Compliant status with REACH Unaffected designation, matching the regulatory compliance of the CMB-103-11CNN-R-A.

Q: Does the 50V DC rating of CBW57 parts affect performance in 32V DC circuits?

A: No. A higher DC voltage rating provides additional operational margin and does not degrade performance in circuits operating at lower voltages. The component functions identically at 32V DC as the original part.

Q: Which CBW57 variant should be selected for a specific application?

A: Selection depends on the connector or terminal type required by the circuit board or panel design. All electrical characteristics (10A, 250V AC, thermal protection, push to reset) are identical across variants. Consult the specific connector requirements of your application to determine the appropriate suffix designation.

Q: Are there inventory considerations when selecting a substitute?

A: Yes. Substitute parts show varying inventory levels. CBW57-PS-10A-5X maintains the highest inventory at 5,818 pieces, while CBW57-PS-10A-1X maintains 701 pieces. Availability should be confirmed for production requirements.

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