CLB-303-11ANN-B-A Equivalent & Substitute Parts

Part Overview

The CLB-303-11ANN-B-A is a thermal circuit breaker manufactured by Carling Technologies, rated for 30A at 250V AC and 32V DC with push-to-reset actuation and panel mount configuration. This component is classified as Active product status and carries multiple international approvals including CE, cUL, TUV, UL1077, and UL1500. The device is ROHS3 compliant and REACH unaffected.

Substitute parts are identified when equivalent electrical and mechanical parameters are maintained across the same functional category. Thermal circuit breakers with identical current ratings, voltage specifications, actuation methods, and mounting configurations can serve as direct replacements in applications where the original part becomes unavailable or when inventory optimization is required.

Substiute Parts

CLB-303-11ANN-B-A

Carling TechnologiesIn Stock: 1056CLB-303-11ANN-B-A Datasheet

Current PartRFQ

CBW57-EJ-30A

OptiFuseIn Stock: 2118CBW57-EJ-30A Datasheet

Parametric EquivalentRFQ

CBW57-EL4-30A

OptiFuseIn Stock: 1508CBW57-EL4-30A Datasheet

Parametric EquivalentRFQ

CBW57-ES-30A

OptiFuseIn Stock: 1381CBW57-ES-30A Datasheet

Parametric EquivalentRFQ

CBW57-PB-30A-WX

OptiFuseIn Stock: 1062CBW57-PB-30A-WX Datasheet

Parametric EquivalentRFQ

CBW57-PS-30A

OptiFuseIn Stock: 1721CBW57-PS-30A Datasheet

Parametric EquivalentRFQ

CBW57-PS-30A-5X

OptiFuseIn Stock: 1507CBW57-PS-30A-5X Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CLB-303-11ANN-B-A are qualified based on the following critical parameters that must remain constant:

Mandatory Matching Parameters:

• Current Rating: 30A
• Voltage Rating - AC: 250V
• Breaker Type: Thermal
• Actuator Type: Push to Reset
• Mounting Type: Panel Mount
• Number of Poles: 1
• Illumination: None

All identified substitute parts are manufactured by OptiFuse under the CBW57 series. These parts maintain identical electrical specifications for AC voltage (250V) and current rating (30A). While the DC voltage rating on substitute parts is specified as 50V compared to the original 32V, this represents an increased capability that does not restrict substitution in applications rated for 32V DC operation. All substitute parts retain thermal breaker functionality, push-to-reset actuation, single-pole configuration, and panel mount design.

Parameter Comparison

Engineering Selection Recommendations

All identified substitute parts maintain Active product status and ROHS3 compliance, ensuring continued availability and regulatory conformance. The CBW57 series from OptiFuse provides functional equivalence across all critical electrical and mechanical parameters.

Approval Agency Considerations:

The original CLB-303-11ANN-B-A carries approvals from CE, cUL, TUV, UL1077, and UL1500. OptiFuse substitute parts carry approvals from cURus, IP 40, SAE J1171, UL 1077, and UL 1500. Both part families include UL 1077 and UL 1500 certifications, which are primary standards for thermal circuit breakers. The substitute parts include additional certifications (cURus, SAE J1171) and IP 40 rating, indicating enhanced environmental protection specifications.

Inventory Availability:

OptiFuse CBW57 series parts demonstrate higher inventory levels across all variants, ranging from 1,049 to 2,083 pieces in stock, compared to 1,019 pieces for the original CLB-303-11ANN-B-A. This availability supports supply chain continuity.

DC Voltage Rating Differential:

The substitute parts specify 50V DC rating compared to the original 32V DC specification. This increased rating does not restrict substitution in applications designed for 32V DC operation, as the component maintains full functionality within the original voltage envelope.

Frequently Asked Questions (FAQ)

Q: Can CBW57 series parts directly replace the CLB-303-11ANN-B-A in all applications?

A: Yes. All substitute parts maintain identical current rating (30A), AC voltage rating (250V), breaker type (thermal), actuation method (push to reset), mounting configuration (panel mount), and pole count (1). The increased DC voltage rating (50V versus 32V) on substitute parts does not restrict operation in 32V DC applications.

Q: What is the significance of the different part number suffixes within the CBW57 series?

A: The suffixes (EJ, EL4, ES, PB-WX, PS, PS-5X) indicate internal design variations or manufacturing options within the OptiFuse CBW57 platform. All variants listed maintain identical electrical specifications and are functionally equivalent for the stated application parameters.

Q: Are there compliance differences between the original and substitute parts?

A: Both the original CLB-303-11ANN-B-A and all CBW57 substitute parts are ROHS3 compliant and carry relevant UL certifications (UL 1077, UL 1500). The substitute parts include additional certifications (cURus, SAE J1171, IP 40) that provide expanded approval coverage. Applications requiring specific approval agencies should verify that the selected substitute meets all required certifications for the intended market.

Q: What is the Moisture Sensitivity Level (MSL) for substitute parts?

A: OptiFuse CBW57 series parts are rated MSL 1 (Unlimited), indicating no moisture sensitivity restrictions for storage or handling.

Q: Can I use any of the six CBW57 variants interchangeably?

A: All six CBW57 variants (CBW57-EJ-30A, CBW57-EL4-30A, CBW57-ES-30A, CBW57-PB-30A-WX, CBW57-PS-30A, CBW57-PS-30A-5X) maintain identical electrical and mechanical specifications. Selection among variants should be based on specific design requirements, mechanical interface details, or internal construction preferences documented in application-specific engineering specifications.

Q: What is the ECCN classification for these parts?

A: Both the original CLB-303-11ANN-B-A and all CBW57 substitute parts are classified as EAR99, indicating they are not subject to export control restrictions under the Export Administration Regulations.