CLB-073-11BNB-B-A Circuit Breaker Equivalent & Substitute Parts

Part Overview

The CLB-073-11BNB-B-A 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 holds Active product status. The breaker is ROHS3 compliant and carries multiple approval agencies 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 qualified alternatives that meet identical electrical and mechanical specifications.

Substiute Parts

CLB-073-11BNB-B-A

Carling TechnologiesIn Stock: 1174CLB-073-11BNB-B-A Datasheet

Current PartRFQ

CBW57-EJ-7A

OptiFuseIn Stock: 1957CBW57-EJ-7A Datasheet

Parametric EquivalentRFQ

CBW57-EL4-7A

OptiFuseIn Stock: 2075CBW57-EL4-7A Datasheet

Parametric EquivalentRFQ

CBW57-ES-7A-5H

OptiFuseIn Stock: 2494CBW57-ES-7A-5H Datasheet

Parametric EquivalentRFQ

CBW57-HS-7A-5C

OptiFuseIn Stock: 1288CBW57-HS-7A-5C Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CLB-073-11BNB-B-A is determined by strict equivalence across the following parameters:

Critical Matching Parameters:

• Current Rating: 7A (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 Variance:

• Voltage Rating - DC: The main part specifies 32V DC. Substitute parts rated at 50V DC are acceptable, as higher DC voltage ratings provide equivalent or superior performance within the same electrical class.

All four substitute parts from OptiFuse (CBW57 series) meet these criteria. Each substitute maintains identical AC voltage, current rating, mounting configuration, actuation method, and pole count. The DC voltage rating increase from 32V to 50V represents an uprated specification that does not compromise compatibility.

Parameter Comparison

Engineering Selection Recommendations

All four OptiFuse CBW57 series substitutes are qualified alternatives to the CLB-073-11BNB-B-A based on the following factors:

Compliance & Certification: All substitute parts maintain Active product status and ROHS3 compliance. The OptiFuse CBW57 series carries approval from cURus, IP 40, SAE J1171, UL 1077, and UL 1500. While the approval agency list differs from the Carling part, both sets include UL 1077 and UL 1500 certifications, which are the primary standards for thermal circuit breakers in this application class.

Electrical Equivalence: Each substitute maintains the 7A current rating and 250V AC voltage specification. The increase in DC voltage rating from 32V to 50V represents an uprated specification that does not reduce performance or compatibility in applications designed for the original 32V DC rating.

Inventory Availability: The CBW57-ES-7A-5H offers the highest inventory level at 2482 pieces, followed by CBW57-EL4-7A at 1998 pieces. Both provide substantial stock availability for immediate procurement.

Moisture Sensitivity: All OptiFuse substitutes carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity constraints during storage or handling.

Frequently Asked Questions (FAQ)

Q: Can CBW57 series breakers directly replace the CLB-073-11BNB-B-A in existing designs?

A: Yes. The CBW57 series substitutes match all critical electrical and mechanical parameters: 7A current rating, 250V AC voltage, panel-mount configuration, push-to-reset actuation, and single-pole design. The 50V DC rating of the substitutes exceeds the original 32V DC specification, maintaining compatibility.

Q: What is the significance of the DC voltage rating increase from 32V to 50V?

A: The DC voltage rating indicates the maximum DC voltage the breaker can safely interrupt. A 50V DC rating is a higher specification than 32V DC and does not create incompatibility. Applications designed for 32V DC operation remain fully compatible with a 50V DC-rated breaker.

Q: Are there differences in approval agencies between the main part and substitutes?

A: The approval agency lists differ. The CLB-073-11BNB-B-A carries CE, cUL, TUV, UL1077, and UL1500 approvals. The CBW57 substitutes carry cURus, IP 40, SAE J1171, UL 1077, and UL 1500 approvals. Both sets include UL 1077 and UL 1500, which are the primary thermal circuit breaker standards. Design requirements should be verified against specific application standards.

Q: Which substitute part offers the best inventory availability?

A: The CBW57-ES-7A-5H provides the highest inventory at 2482 pieces in stock, followed by CBW57-EL4-7A at 1998 pieces.

Q: Do all substitutes carry the same RoHS compliance status?

A: Yes. All four OptiFuse CBW57 series substitutes are ROHS3 compliant, matching the compliance status of the original CLB-073-11BNB-B-A.

Q: What does MSL 1 (Unlimited) mean for the OptiFuse substitutes?

A: MSL 1 (Unlimited) indicates Moisture Sensitivity Level 1, which means the component has no moisture sensitivity constraints. These parts can be stored and handled without special moisture control measures, simplifying logistics and inventory management.

Q: Are there any mechanical or dimensional differences between the main part and substitutes?

A: The provided specifications do not include dimensional data. Both the main part and all substitutes are panel-mount thermal circuit breakers with push-to-reset actuation. Physical compatibility should be verified through mechanical drawings or direct comparison if space constraints are critical to the application.