CMB-153-12H3N-B-A Circuit Breaker Equivalent & Substitute Parts

Part Overview

The CMB-153-12H3N-B-A is a thermal circuit breaker manufactured by Carling Technologies, rated for 15A at 250V AC and 32V DC with push-to-reset panel mount actuation. This component is classified as Active product status and carries multiple international approvals including CE, cUL, TUV, UL1077, and UL1500 certifications. The device is ROHS3 compliant and REACH unaffected.

Substitute parts are identified when equivalent electrical and mechanical parameters align with the main part specifications, enabling direct replacement in applications where the primary part is unavailable or when inventory optimization is required.

Key Parameters

Parameter	Value
Breaker Type	Thermal
Current Rating	15A
Voltage Rating - AC	250V
Voltage Rating - DC	32V
Actuator Type	Push to Reset
Mounting Type	Panel Mount
Number of Poles	1
Illumination	None
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the CMB-153-12H3N-B-A are identified from the OptiFuse CBW57 series based on the following critical parameters:

Matching Parameters (Required for Substitution):

Current Rating: 15A
Voltage Rating - AC: 250V
Breaker Type: Thermal
Actuator Type: Push to Reset
Mounting Type: Panel Mount
Number of Poles: 1
Illumination: None

Parameter Variance Allowed:

Voltage Rating - DC: The main part specifies 32V DC, while substitute parts are rated for 50V DC. This represents an upward voltage rating compatibility, as components rated for higher DC voltage can operate safely at lower DC voltage levels.

All substitute parts maintain identical electrical functionality and mechanical form factor, differing only in manufacturer designation and internal construction variants within the CBW57 series platform.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Current Rating (A)	Voltage AC (V)	Voltage DC (V)	Breaker Type	Actuator Type	Mounting Type	Poles	RoHS Status
CMB-153-12H3N-B-A	Carling Technologies	15	250	32	Thermal	Push to Reset	Panel Mount	1	ROHS3 Compliant
CBW57-EJ-15A	OptiFuse	15	250	50	Thermal	Push to Reset	Panel Mount	1	ROHS3 Compliant
CBW57-EL4-15A	OptiFuse	15	250	50	Thermal	Push to Reset	Panel Mount	1	ROHS3 Compliant
CBW57-ES-15A	OptiFuse	15	250	50	Thermal	Push to Reset	Panel Mount	1	ROHS3 Compliant
CBW57-ES-15A-5X	OptiFuse	15	250	50	Thermal	Push to Reset	Panel Mount	1	ROHS3 Compliant
CBW57-GS-15A-WB	OptiFuse	15	250	50	Thermal	Push to Reset	Panel Mount	1	ROHS3 Compliant
CBW57-HB-15A-P	OptiFuse	15	250	50	Thermal	Push to Reset	Panel Mount	1	ROHS3 Compliant
CBW57-HS-15A-5X	OptiFuse	15	250	50	Thermal	Push to Reset	Panel Mount	1	ROHS3 Compliant
CBW57-PB-15A-5X	OptiFuse	15	250	50	Thermal	Push to Reset	Panel Mount	1	ROHS3 Compliant
CBW57-PB-15A-WX	OptiFuse	15	250	50	Thermal	Push to Reset	Panel Mount	1	ROHS3 Compliant
CBW57-PS-15A	OptiFuse	15	250	50	Thermal	Push to Reset	Panel Mount	1	ROHS3 Compliant

Engineering Selection Recommendations

All listed substitute parts maintain Active product status and carry regulatory approvals suitable for industrial applications. The OptiFuse CBW57 series components are certified to cURus, IP 40, SAE J1171, UL 1077, and UL 1500 standards, providing compliance coverage for the same application domains as the primary CMB-153-12H3N-B-A part.

The primary distinction among substitute options relates to internal construction variants designated by the suffix codes (EJ, EL4, ES, GS, HB, HS, PB, PS). These designations reflect different terminal configurations and mechanical interfaces within the CBW57 platform. Selection among these variants depends on specific panel mount requirements and terminal connection specifications for the target application.

All substitute parts are ROHS3 compliant and REACH unaffected, maintaining environmental regulatory alignment with the original component.

Frequently Asked Questions (FAQ)

Q: Can CBW57 series parts directly replace the CMB-153-12H3N-B-A in all applications?

A: Yes, provided the application operates at or below 32V DC. The CBW57 substitute parts are rated for 50V DC, which is compatible with 32V DC applications. All other electrical and mechanical parameters are equivalent.

Q: What is the significance of the suffix codes in CBW57 part numbers (EJ, EL4, ES, GS, HB, HS, PB, PS)?

A: These suffixes denote internal construction variants and terminal configurations within the CBW57 series. Selection of the appropriate suffix depends on the specific panel mount interface and terminal connection type required for your application.

Q: Are all substitute parts ROHS3 compliant?

A: Yes, all listed substitute parts carry ROHS3 compliance certification, matching the environmental compliance status of the CMB-153-12H3N-B-A.

Q: What certifications do the OptiFuse CBW57 substitute parts carry?

A: The CBW57 series holds cURus, IP 40, SAE J1171, UL 1077, and UL 1500 certifications. These certifications cover the same regulatory domains as the original Carling Technologies part.

Q: Is there a difference in thermal response between the CMB-153-12H3N-B-A and CBW57 substitutes?

A: Both the main part and all substitute parts are classified as thermal breakers with identical 15A current ratings. Thermal response characteristics are determined by the 15A rating specification common to all parts.

Q: Can I use a CBW57 part with higher DC voltage rating in a 32V DC application?

A: Yes. A component rated for 50V DC can operate safely at 32V DC. The higher voltage rating provides additional safety margin in the application.

Q: What inventory levels are available for substitute parts?

A: Inventory availability varies by part number. CBW57-HB-15A-P offers the highest stock level at 8,822 pieces, while CBW57-PB-15A-WX offers 936 pieces. Intermediate inventory levels are available across other variants.

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