CMB-053-11CNN-B-A/05 Equivalent & Substitute Parts

Part Overview

The CMB-053-11CNN-B-A/05 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 holds active product status with full compliance to CE, cUL, TUV, UL1077, and UL1500 standards. The component is RoHS3 compliant and REACH unaffected. Substitute parts are identified when equivalent electrical and mechanical parameters are maintained across alternative manufacturers, ensuring functional interchangeability in circuit protection applications.

Key Parameters

Parameter	Value
Manufacturer	Carling Technologies
Part Number	CMB-053-11CNN-B-A/05
Series	CMB
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
Product Status	Active
RoHS Status	RoHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the CMB-053-11CNN-B-A/05 are qualified based on the following critical parameters that must align for functional interchangeability:

Mandatory Matching Parameters:

Current Rating: 5A
Voltage Rating - AC: 250V
Mounting Type: Panel Mount
Breaker Type: Thermal
Actuator Type: Push to Reset
Number of Poles: 1

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 under the CBW57 series and maintain active product status with RoHS3 compliance and equivalent approval certifications (cURus, UL 1077, UL 1500).

Parameter Comparison

Parameter	CMB-053-11CNN-B-A/05	CBW57-EJ-5A	CBW57-EL4-5A	CBW57-ES-5A	CBW57-PF-5A-5X	CBW57-PL-5A-5X	CBW57-PS-5A	CBW57-PS-5A-1X	CBW57-PS-5A-5X	CBW57-PS-5A-W
Manufacturer	Carling Technologies	OptiFuse	OptiFuse	OptiFuse	OptiFuse	OptiFuse	OptiFuse	OptiFuse	OptiFuse	OptiFuse
Current Rating (Amps)	5A	5A	5A	5A	5A	5A	5A	5A	5A	5A
Voltage Rating - AC	250V	250V	250V	250V	250V	250V	250V	250V	250V	250V
Voltage Rating - DC	32V	50V	50V	50V	50V	50V	50V	50V	50V	50V
Breaker Type	Thermal	Thermal	Thermal	Thermal	Thermal	Thermal	Thermal	Thermal	Thermal	Thermal
Mounting Type	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
Number of Poles	1	1	1	1	1	1	1	1	1	1
Product Status	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active
RoHS Status	RoHS3 Compliant	RoHS3 Compliant	RoHS3 Compliant	RoHS3 Compliant	RoHS3 Compliant	RoHS3 Compliant	RoHS3 Compliant	RoHS3 Compliant	RoHS3 Compliant	RoHS3 Compliant

Engineering Selection Recommendations

All substitute parts listed maintain active product status and RoHS3 compliance, ensuring regulatory alignment with the original CMB-053-11CNN-B-A/05. The OptiFuse CBW57 series alternatives carry equivalent or expanded approval certifications including cURus, UL 1077, and UL 1500, meeting or exceeding the original component's compliance profile.

The primary distinction among substitute options relates to packaging configuration, indicated by suffix designations (1X, 5X, W, etc.). These variants do not affect electrical or mechanical performance but reflect different tape-and-reel or bulk packaging specifications. Selection among CBW57-PS-5A, CBW57-PS-5A-1X, CBW57-PS-5A-5X, and CBW57-PS-5A-W should be based on procurement and assembly requirements rather than functional criteria.

The elevated DC voltage rating (50V versus 32V) on all OptiFuse substitutes provides enhanced capability for applications operating at the original 32V DC specification, with no functional degradation or incompatibility.

Frequently Asked Questions (FAQ)

Q: Can CBW57 series parts directly replace the CMB-053-11CNN-B-A/05?

A: Yes. All CBW57 variants listed maintain identical current rating (5A), AC voltage rating (250V), mounting configuration (panel mount), breaker type (thermal), and actuation method (push to reset). The 50V DC rating on CBW57 parts exceeds the original 32V DC specification and is compatible with applications designed for 32V DC operation.

Q: What do the suffixes (1X, 5X, W) in CBW57 part numbers indicate?

A: These suffixes denote packaging configurations and tape-and-reel specifications. They do not alter electrical performance or mechanical compatibility. Selection should align with manufacturing and procurement processes.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed OptiFuse CBW57 variants are RoHS3 compliant and REACH unaffected, matching the regulatory status of the original CMB-053-11CNN-B-A/05.

Q: Which substitute part has the highest inventory availability?

A: CBW57-ES-5A maintains the highest stock level at 5,629 pieces. CBW57-PS-5A follows with 2,137 pieces. Inventory levels should be verified at time of procurement.

Q: Do substitute parts carry the same certifications as the original?

A: OptiFuse CBW57 parts carry cURus, IP 40, SAE J1171, UL 1077, and UL 1500 certifications. The original CMB-053-11CNN-B-A/05 carries CE, cUL, TUV, UL1077, and UL1500. Both meet UL 1077 and UL 1500 standards. Specific certification requirements for your application should be confirmed against design documentation.

Q: Is the 50V DC rating on CBW57 parts a limitation for 32V DC applications?

A: No. A higher voltage rating indicates greater capability and does not restrict operation at lower voltages. CBW57 parts rated 50V DC operate correctly in circuits specified for 32V DC.

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