CMB-053-11CNN-R-A Circuit Breaker Equivalent & Substitute Parts

Part Overview

The CMB-053-11CNN-R-A is a thermal circuit breaker manufactured by Carling Technologies, rated for 5A 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 with full compliance to CE, cUL, TUV, UL1077, and UL1500 standards. Substitute parts are identified when equivalent electrical and mechanical parameters are required for design flexibility, inventory management, or supply chain continuity.

Key Parameters

Parameter	Value
Breaker Type	Thermal
Current Rating	5A
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-053-11CNN-R-A are qualified based on the following electrical and mechanical parameters:

Critical Matching Parameters:

Current Rating: 5A (exact match required)
Voltage Rating - AC: 250V (exact match required)
Mounting Type: Panel Mount (exact match required)
Actuator Type: Push to Reset (exact match required)
Number of Poles: 1 (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 within the same application envelope.

All identified substitute parts are manufactured by OptiFuse under the CBW57 series and maintain identical electrical performance for the specified 5A, 250V AC circuit protection function. Each substitute part carries active product status and ROHS3 compliance.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Series	Current Rating (A)	Voltage AC (V)	Voltage DC (V)	Mounting Type	Actuator Type	Poles	Breaker Type	Product Status	RoHS Status
CMB-053-11CNN-R-A	Carling Technologies	CMB	5	250	32	Panel Mount	Push to Reset	1	Thermal	Active	ROHS3 Compliant
CBW57-EJ-5A	OptiFuse	CBW57	5	250	50	Panel Mount	Push to Reset	1	Thermal	Active	ROHS3 Compliant
CBW57-EL4-5A	OptiFuse	CBW57	5	250	50	Panel Mount	Push to Reset	1	Thermal	Active	ROHS3 Compliant
CBW57-ES-5A	OptiFuse	CBW57	5	250	50	Panel Mount	Push to Reset	1	Thermal	Active	ROHS3 Compliant
CBW57-PF-5A-5X	OptiFuse	CBW57	5	250	50	Panel Mount	Push to Reset	1	Thermal	Active	ROHS3 Compliant
CBW57-PL-5A-5X	OptiFuse	CBW57	5	250	50	Panel Mount	Push to Reset	1	Thermal	Active	ROHS3 Compliant
CBW57-PS-5A	OptiFuse	CBW57	5	250	50	Panel Mount	Push to Reset	1	Thermal	Active	ROHS3 Compliant
CBW57-PS-5A-1X	OptiFuse	CBW57	5	250	50	Panel Mount	Push to Reset	1	Thermal	Active	ROHS3 Compliant
CBW57-PS-5A-5X	OptiFuse	CBW57	5	250	50	Panel Mount	Push to Reset	1	Thermal	Active	ROHS3 Compliant
CBW57-PS-5A-W	OptiFuse	CBW57	5	250	50	Panel Mount	Push to Reset	1	Thermal	Active	ROHS3 Compliant

Engineering Selection Recommendations

All identified substitute parts from the OptiFuse CBW57 series are qualified replacements for the CMB-053-11CNN-R-A based on electrical and mechanical equivalence. Selection among the substitute options is determined by specific connector or terminal configurations indicated by the part number suffix, not by electrical performance.

Compliance Basis:

Main part CMB-053-11CNN-R-A carries approvals: CE, cUL, TUV, UL1077, UL1500
All OptiFuse CBW57 substitutes carry approvals: cURus, IP 40, SAE J1171, UL 1077, UL 1500
Both main and substitute parts are ROHS3 compliant and REACH unaffected
All parts maintain active product status

Inventory Availability: Substitute parts demonstrate consistent availability across multiple configurations, with inventory ranging from 798 to 5629 units in stock.

Frequently Asked Questions (FAQ)

Q: Can CBW57 series parts directly replace the CMB-053-11CNN-R-A?

A: Yes. All CBW57 substitute parts match the critical electrical parameters: 5A current rating, 250V AC voltage rating, single-pole thermal operation, and push-to-reset panel-mount configuration. The DC voltage rating difference (32V vs. 50V) represents a higher capability in the substitute parts and does not prevent substitution.

Q: What do the suffixes in CBW57 part numbers indicate?

A: The suffixes (such as -EJ, -EL4, -ES, -PF, -PL, -PS, -1X, -5X, -W) denote different connector or terminal configurations. All variants maintain identical electrical specifications for 5A, 250V AC thermal circuit protection.

Q: Are there any electrical performance differences between the main part and substitutes?

A: No. All parts provide identical 5A thermal circuit protection at 250V AC. The DC voltage rating increase in substitute parts (50V vs. 32V) expands application capability without affecting performance in 32V DC circuits.

Q: Do all substitute parts carry the same certifications?

A: Both the main part and all substitutes carry UL 1077 and UL 1500 certifications. The main part includes CE and TUV approvals, while substitutes include cURus, IP 40, and SAE J1171 approvals. All parts meet ROHS3 compliance requirements.

Q: How should I select among the different CBW57 variants?

A: Selection is based on the required terminal or connector type for your specific panel mount application. All electrical and mechanical parameters are identical across variants. Consult the connector specification for your design to determine the appropriate suffix.

Q: Is there a difference in moisture sensitivity between parts?

A: OptiFuse CBW57 parts specify MSL 1 (Unlimited), indicating no moisture sensitivity limitations during storage or handling.

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