CMB-053-27GNN-B-A Equivalent & Substitute Parts

Part Overview

The CMB-053-27GNN-B-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 holds Active product status. The breaker is RoHS3 compliant and carries multiple international approvals including CE, cUL, TUV, UL1077, and UL1500.

Substitute parts become necessary when the primary part experiences extended lead times, inventory constraints, or when design flexibility permits selection from alternative manufacturers meeting identical electrical and mechanical specifications.

Key Parameters

Parameter	Value
Breaker Type	Thermal
Current Rating	5A
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-053-27GNN-B-A are qualified based on strict electrical and mechanical parameter alignment. All substitute parts listed are manufactured by OptiFuse under the CBW57 series and maintain the following critical specifications:

Matching Parameters:

Current Rating: 5A
Voltage Rating - AC: 250V
Mounting Type: Panel Mount
Number of Poles: 1
Actuator Type: Push to Reset
Breaker Type: Thermal
Illumination: None
RoHS3 Compliance
Active Product Status

Parameter Variance: The substitute parts operate at 50V DC maximum rating, compared to the main part's 32V DC rating. This represents an upward compatibility margin and does not restrict substitution in applications requiring 32V DC operation.

All substitute parts carry equivalent international approvals (cURus, UL 1077, UL 1500) and maintain REACH Unaffected status. Moisture Sensitivity Level (MSL) is rated 1 (Unlimited) across all substitutes.

Parameter Comparison

Parameter	CMB-053-27GNN-B-A (Carling)	CBW57-EJ-5A (OptiFuse)	CBW57-EL4-5A (OptiFuse)	CBW57-ES-5A (OptiFuse)	CBW57-PF-5A-5X (OptiFuse)	CBW57-PL-5A-5X (OptiFuse)	CBW57-PS-5A (OptiFuse)	CBW57-PS-5A-1X (OptiFuse)	CBW57-PS-5A-5X (OptiFuse)	CBW57-PS-5A-W (OptiFuse)
Breaker Type	Thermal	Thermal	Thermal	Thermal	Thermal	Thermal	Thermal	Thermal	Thermal	Thermal
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
Mounting Type	Panel Mount	Panel Mount	Panel Mount	Panel Mount	Panel Mount	Panel Mount	Panel Mount	Panel Mount	Panel Mount	Panel Mount
Number of Poles	1	1	1	1	1	1	1	1	1	1
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
Illumination	None	None	None	None	None	None	None	None	None	None
RoHS Status	RoHS3 Compliant	RoHS3 Compliant	RoHS3 Compliant	RoHS3 Compliant	RoHS3 Compliant	RoHS3 Compliant	RoHS3 Compliant	RoHS3 Compliant	RoHS3 Compliant	RoHS3 Compliant
Product Status	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

All listed OptiFuse CBW57 series substitutes maintain Active product status and full RoHS3 compliance, ensuring long-term availability and regulatory alignment with the original CMB-053-27GNN-B-A.

The substitute parts carry equivalent international certifications including cURus, UL 1077, and UL 1500 approvals. These certifications satisfy the same safety and performance standards as the original part's CE, cUL, TUV, UL1077, and UL1500 designations.

The 50V DC rating on all substitute parts provides operational compatibility with the 32V DC specification of the main part. This upward voltage margin does not introduce compatibility issues in applications operating at or below 32V DC.

All substitute parts are available in bulk packaging with inventory levels ranging from 798 to 5,629 units, supporting both immediate procurement and long-term supply chain planning.

Frequently Asked Questions (FAQ)

Q: Can CBW57 series breakers directly replace the CMB-053-27GNN-B-A in existing designs?

A: Yes. All CBW57 substitutes match the critical electrical parameters (5A, 250V AC, 32V DC operation), mounting configuration (panel mount), and actuation method (push to reset). The 50V DC rating on substitutes is compatible with 32V DC applications.

Q: What is the significance of the different CBW57 part number suffixes (EJ, EL4, ES, PF, PL, PS, PS-1X, PS-5X, PS-W)?

A: The suffixes denote internal design variations or packaging configurations within the CBW57 series. All variants listed maintain identical electrical specifications and are functionally equivalent for the stated 5A, 250V AC, 32V DC application.

Q: Are there any compliance or certification differences between the main part and substitutes?

A: Both the main part and all substitutes are RoHS3 compliant and REACH Unaffected. The substitute parts carry cURus, IP 40, SAE J1171, UL 1077, and UL 1500 certifications, which satisfy equivalent safety standards to the original part's CE, cUL, TUV, UL1077, and UL1500 approvals.

Q: Which substitute part offers the highest inventory availability?

A: CBW57-ES-5A maintains the highest inventory level at 5,629 units in stock, followed by CBW57-PS-5A at 2,137 units.

Q: Is the 50V DC rating on substitutes a limiting factor for 32V DC applications?

A: No. The 50V DC rating represents the maximum voltage the substitute can withstand. Applications operating at 32V DC operate well within this margin and experience no performance degradation.

Q: Can substitutes be mixed within a single design or assembly?

A: Yes. All listed CBW57 variants are electrically and mechanically equivalent for the 5A, 250V AC, 32V DC specification and can be used interchangeably within the same application.

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