CMB-073-11CNN-B-A/07 Equivalent & Substitute Parts

Part Overview

The CMB-073-11CNN-B-A/07 is a thermal circuit breaker manufactured by Carling Technologies, rated for 7A at 250V AC and 32V DC. This single-pole, panel-mount device features push-to-reset actuation and is designed for overcurrent protection in low-voltage applications. The part maintains active product status and carries multiple international approvals including CE, cUL, TUV, UL1077, and UL1500 certifications. Substitute parts are identified when equivalent electrical and mechanical parameters are required for component replacement or design flexibility.

Key Parameters

Parameter	Value
Breaker Type	Thermal
Current Rating	7A
Voltage Rating - AC	250V
Voltage Rating - DC	32V
Mounting Type	Panel Mount
Number of Poles	1
Actuator Type	Push to Reset
Illumination	None
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the CMB-073-11CNN-B-A/07 are qualified based on the following electrical and mechanical parameters:

Critical Matching Parameters:

Current Rating: 7A (exact match required)
Voltage Rating - AC: 250V (exact match required)
Mounting Type: Panel Mount (exact match required)
Number of Poles: 1 (exact match required)
Actuator Type: Push to Reset (exact match required)
Breaker Type: Thermal (exact match required)

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 identified substitute parts are manufactured by OptiFuse and belong to the CBW57 series. Each substitute maintains active product status and ROHS3 compliance. The substitutes differ only in DC voltage rating (50V versus 32V) and internal construction variants, which do not affect functional equivalence in standard applications.

Parameter Comparison

Parameter	CMB-073-11CNN-B-A/07 (Carling)	CBW57-EJ-7A (OptiFuse)	CBW57-EL4-7A (OptiFuse)	CBW57-ES-7A-5H (OptiFuse)	CBW57-HS-7A-5C (OptiFuse)
Breaker Type	Thermal	Thermal	Thermal	Thermal	Thermal
Current Rating (Amps)	7A	7A	7A	7A	7A
Voltage Rating - AC	250V	250V	250V	250V	250V
Voltage Rating - DC	32V	50V	50V	50V	50V
Mounting Type	Panel Mount	Panel Mount	Panel Mount	Panel Mount	Panel Mount
Number of Poles	1	1	1	1	1
Actuator Type	Push to Reset	Push to Reset	Push to Reset	Push to Reset	Push to Reset
Illumination	None	None	None	None	None
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active	Active

Engineering Selection Recommendations

All four OptiFuse CBW57 series substitutes maintain active product status and ROHS3 compliance, matching the environmental and regulatory requirements of the original CMB-073-11CNN-B-A/07. The substitutes carry international approvals including cURus, UL 1077, and UL 1500 certifications, which align with the approval framework of the original part.

The primary technical difference is the DC voltage rating: OptiFuse substitutes are rated for 50V DC compared to the original 32V DC rating. This higher DC voltage capability does not restrict use in applications specified for 32V DC operation. The substitutes are functionally equivalent for all electrical and mechanical parameters critical to circuit breaker operation.

Selection among the four OptiFuse variants (CBW57-EJ-7A, CBW57-EL4-7A, CBW57-ES-7A-5H, CBW57-HS-7A-5C) depends on availability and specific connector or terminal configurations required by the application, as these variants represent different construction options within the CBW57 series.

Frequently Asked Questions (FAQ)

Q: Can OptiFuse CBW57 series parts directly replace the Carling CMB-073-11CNN-B-A/07?

A: Yes. All four OptiFuse substitutes match the critical electrical parameters (7A, 250V AC, 32V DC operation capability) and mechanical specifications (panel mount, single-pole, push-to-reset). The 50V DC rating of OptiFuse parts exceeds the 32V DC requirement and does not restrict compatibility.

Q: What is the difference between the four OptiFuse substitute part numbers?

A: CBW57-EJ-7A, CBW57-EL4-7A, CBW57-ES-7A-5H, and CBW57-HS-7A-5C are variants within the CBW57 series that differ in internal construction and terminal configurations. All four maintain identical electrical ratings and functional performance for the specified 7A, 250V AC application.

Q: Are the OptiFuse substitutes certified to the same standards as the original part?

A: The OptiFuse substitutes carry cURus, UL 1077, and UL 1500 certifications. The original part carries CE, cUL, TUV, UL1077, and UL1500 certifications. Both sets of parts meet UL 1077 and UL 1500 standards. Specific application requirements may dictate which certification set is necessary.

Q: Does the higher DC voltage rating (50V) of OptiFuse parts affect performance in 32V DC applications?

A: No. A higher voltage rating indicates greater electrical capability and does not degrade performance in lower-voltage applications. The 50V DC rating of OptiFuse substitutes is fully compatible with 32V DC circuit requirements.

Q: What inventory levels are available for each substitute?

A: CBW57-ES-7A-5H has 2482 units in stock, CBW57-EL4-7A has 1998 units, CBW57-EJ-7A has 1884 units, and CBW57-HS-7A-5C has 1197 units available as new original stock.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All four OptiFuse substitutes are ROHS3 compliant, matching the environmental compliance status of the original CMB-073-11CNN-B-A/07.

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