CLB-303-12CNN-W-H/30 Equivalent & Substitute Parts

Part Overview

The CLB-303-12CNN-W-H/30 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. Substitute thermal circuit breakers with identical current ratings, voltage specifications, actuation methods, and mounting configurations provide direct functional replacement capability.

Substiute Parts

CLB-303-12CNN-W-H/30

Carling TechnologiesIn Stock: 1271CLB-303-12CNN-W-H/30 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 thermal circuit breakers for the CLB-303-12CNN-W-H/30 are qualified based on the following critical parameters:

Electrical Equivalence Criteria:

• Current Rating: 30A (exact match required)
• Voltage Rating - AC: 250V (exact match required)
• Voltage Rating - DC: 32V minimum (substitutes rated at 50V DC exceed minimum requirement)

Mechanical Equivalence Criteria:

• Breaker Type: Thermal (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)
• Illumination: None (exact match required)

Compliance Criteria:

• Product Status: Active (all substitutes maintain active status)
• RoHS Status: ROHS3 Compliant (all substitutes maintain compliance)

All identified substitute parts are manufactured by OptiFuse in the CBW57 series and maintain functional equivalence within the specified parameter constraints.

Parameter Comparison

Engineering Selection Recommendations

All seven OptiFuse CBW57 series thermal circuit breakers listed provide functional equivalence to the CLB-303-12CNN-W-H/30 based on matching electrical and mechanical parameters. Selection among substitute parts should be based on the following factors:

Compliance and Certification: The CLB-303-12CNN-W-H/30 carries approvals from CE, cUL, TUV, UL1077, and UL1500. All substitute parts carry cURus, IP 40, SAE J1171, UL 1077, and UL 1500 certifications. Both the main part and substitutes maintain ROHS3 compliance and REACH unaffected status.

Voltage Rating Consideration: All substitute parts are rated for 50V DC, which exceeds the 32V DC requirement of the main part. This higher DC voltage rating provides additional operational margin in DC applications.

Product Availability: All substitute parts maintain Active product status with current inventory levels ranging from 1,049 to 2,083 pieces, ensuring supply continuity.

Moisture Sensitivity: All OptiFuse CBW57 series substitutes carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity constraints during storage or handling.

Frequently Asked Questions (FAQ)

Q: Can CBW57 series circuit breakers directly replace the CLB-303-12CNN-W-H/30?

A: Yes. The CBW57 series parts listed maintain identical current ratings (30A), AC voltage ratings (250V), mounting configurations (panel mount), actuation methods (push to reset), and pole counts (1 pole). All parts are thermal breakers with no illumination and carry equivalent compliance certifications.

Q: What is the significance of the higher DC voltage rating on substitute parts?

A: The substitute parts are rated for 50V DC compared to the main part's 32V DC rating. This higher rating indicates the substitute components can operate safely at higher DC voltages. In applications using 32V DC or lower, the substitute parts operate within their rated specifications with additional safety margin.

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

A: The main part CLB-303-12CNN-W-H/30 carries CE, cUL, TUV, UL1077, and UL1500 approvals. The OptiFuse CBW57 substitutes carry cURus, IP 40, SAE J1171, UL 1077, and UL 1500 approvals. Both sets of parts meet UL 1077 and UL 1500 standards. Application-specific regulatory requirements should determine which certification set is appropriate for your use case.

Q: Do all substitute parts have identical part number suffixes?

A: No. The CBW57 series includes six distinct part numbers: CBW57-EJ-30A, CBW57-EL4-30A, CBW57-ES-30A, CBW57-PB-30A-WX, CBW57-PS-30A, and CBW57-PS-30A-5X. These suffixes indicate different connector or terminal configurations. Selection should be based on the specific interface requirements of your application.

Q: What is the moisture sensitivity level of the substitute parts?

A: All OptiFuse CBW57 series substitutes carry MSL 1 (Unlimited) rating. This classification indicates no moisture sensitivity constraints and no special storage or handling requirements related to moisture exposure.

Q: Are all substitute parts in active production?

A: Yes. All seven substitute parts maintain Active product status, confirming current manufacturing and availability.