W28-XQ1B-8 Equivalent & Substitute Parts

Part Overview

The W28-XQ1B-8 is a thermal circuit breaker manufactured by TE Connectivity Potter & Brumfield Relays, rated for 8A at 250V AC and 32V DC. This single-pole, panel-mount device features push-to-reset actuation and is designed for overcurrent protection in industrial and commercial applications. The part is currently active in production with ROHS3 compliance and REACH affected status. Substitute parts are identified when equivalent electrical and mechanical parameters are required for component replacement, inventory optimization, or supply chain continuity.

Substiute Parts

W28-XQ1B-8

TE Connectivity Potter & Brumfield RelaysIn Stock: 1197W28-XQ1B-8 Datasheet

Current PartRFQ

W28-XQ1A-8

TE Connectivity Potter & Brumfield RelaysIn Stock: 10120W28-XQ1A-8 Datasheet

Parametric EquivalentRFQ

W28-XT1A-8

TE Connectivity Potter & Brumfield RelaysIn Stock: 1375W28-XT1A-8 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the W28-XQ1B-8 are qualified based on strict electrical and mechanical parameter equivalence within the W28 series thermal circuit breaker family. The following parameters must match identically for substitution eligibility:

• Current Rating: 8A
• Voltage Rating - AC: 250V
• Voltage Rating - DC: 32V
• Breaker Type: Thermal
• Mounting Type: Panel Mount
• Actuator Type: Push to Reset
• Number of Poles: 1
• Series: W28

Substitute parts W28-XQ1A-8 and W28-XT1A-8 satisfy all electrical and mechanical requirements for direct replacement in applications requiring 8A thermal circuit protection at 250V AC / 32V DC with panel-mount configuration.

Parameter Comparison

Engineering Selection Recommendations

All three parts—W28-XQ1B-8, W28-XQ1A-8, and W28-XT1A-8—are active production components with ROHS3 compliance and identical electrical and mechanical specifications. Selection between these parts is determined by regulatory and compliance requirements:

W28-XQ1B-8 is the primary specification part with REACH Affected status, suitable for applications where REACH compliance documentation is required or where the original part number must be maintained.

W28-XQ1A-8 provides an alternative with REACH Unaffected status, offering regulatory simplification for applications in regions with strict REACH compliance requirements. This part maintains full electrical and mechanical equivalence.

W28-XT1A-8 is functionally equivalent with REACH Affected status, providing an alternative sourcing option with comparable inventory availability to the primary part.

All three parts are suitable for direct substitution in 8A thermal circuit protection applications at 250V AC / 32V DC with panel-mount configuration.

Frequently Asked Questions (FAQ)

Q: Can W28-XQ1A-8 or W28-XT1A-8 be used as direct replacements for W28-XQ1B-8?

A: Yes. All three parts share identical electrical ratings (8A, 250V AC, 32V DC), thermal breaker type, panel-mount configuration, and push-to-reset actuation. They are mechanically and electrically interchangeable for overcurrent protection applications.

Q: What is the difference between REACH Affected and REACH Unaffected status?

A: REACH Affected parts require compliance documentation under EU Regulation (EC) No 1907/2006. REACH Unaffected parts are not subject to these regulatory requirements. Selection depends on application location and regulatory obligations.

Q: Are all three parts available in the same packaging?

A: Yes. W28-XQ1B-8, W28-XQ1A-8, and W28-XT1A-8 are all supplied in bulk packaging.

Q: What does Moisture Sensitivity Level (MSL) indicate?

A: MSL 1 (Unlimited) indicates the component has unlimited shelf life without moisture control measures. The W28-XQ1B-8 lists MSL as Not Applicable, while both substitute parts are rated MSL 1 (Unlimited).

Q: Can these parts be used in both AC and DC circuits?

A: Yes. All three parts are rated for 250V AC and 32V DC, permitting use in either AC or DC applications within these voltage limits.

Q: What is the current rating tolerance for these 8A thermal circuit breakers?

A: The provided specifications indicate an 8A current rating. Detailed tolerance information is not included in the supplied parameters.