FWH-275A Equivalent & Substitute Parts

Part Overview

The FWH-275A is a 275A cartridge fuse manufactured by Eaton - Bussmann Electrical Division, rated for 500 VAC and 500 VDC operation with bolt mount configuration. This component is designed for industrial and electrical applications requiring high-current protection in systems operating at elevated voltage levels. The part maintains Active product status with 843 units in current inventory. Substitute parts are identified when equivalent electrical ratings and mechanical compatibility are maintained across manufacturers, enabling procurement flexibility and supply chain continuity.

Substiute Parts

FWH-275A

Eaton - Bussmann Electrical DivisionIn Stock: 888FWH-275A Datasheet

Current PartRFQ

L50S275.V

Littelfuse Inc.In Stock: 1176L50S275.V Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the FWH-275A are identified based on the following critical electrical and mechanical parameters:

• Current Rating: 275A (exact match required)
• Voltage Rating - AC: 500 VAC (exact match required)
• Fuse Type: Cartridge (exact match required)
• Mounting Type: Bolt Mount (exact match required)
• Package / Case: Cylindrical, Blade Terminal (Bolt) (exact match required)
• Approval Agency: CE, CSA, UR (certification alignment required)
• Product Status: Active (current availability required)

The L50S275.V from Littelfuse Inc. qualifies as a substitute based on matching current rating, AC voltage rating, fuse type, mounting configuration, and package style. Both parts maintain Active product status and share identical approval certifications. Differences in DC voltage rating (500 VDC vs. 450 VDC) and breaking capacity at rated DC voltage (50kA vs. 20kA) represent the primary technical distinctions between these components.

Parameter Comparison

Engineering Selection Recommendations

Both the FWH-275A and L50S275.V maintain Active product status with current manufacturing support and identical regulatory certifications (CE, CSA, UR). Selection between these components should be based on system DC voltage requirements and physical space constraints.

The FWH-275A provides 500 VDC rating with 50kA DC breaking capacity and measures 1.500" Dia x 4.340" L. The L50S275.V operates at 450 VDC with 20kA DC breaking capacity and measures 1.500" Dia x 2.094" L. Both components deliver 200kA AC breaking capacity at rated voltage.

For applications operating at 500 VDC, the FWH-275A is the appropriate selection. For applications operating at 450 VDC or lower, the L50S275.V is suitable and offers a more compact physical profile. Both parts comply with current RoHS requirements and maintain equivalent AC performance characteristics.

Frequently Asked Questions (FAQ)

Q: Can the L50S275.V replace the FWH-275A in all applications?

A: The L50S275.V is suitable for applications operating at 450 VDC or lower. If your system operates at 500 VDC, the FWH-275A is required. Both components share identical 275A current rating, 500 VAC rating, and 200kA AC breaking capacity.

Q: What is the significance of the physical dimension difference between these parts?

A: The FWH-275A measures 1.500" Dia x 4.340" L while the L50S275.V measures 1.500" Dia x 2.094" L. Both share identical diameter and bolt mount configuration. Physical length difference may affect mounting space availability in your enclosure. Verify clearance before substitution.

Q: Are both parts RoHS compliant?

A: Yes. The FWH-275A is RoHS Compliant. The L50S275.V is ROHS3 Compliant. Both meet current environmental compliance requirements.

Q: What is the difference in DC breaking capacity?

A: The FWH-275A provides 50kA DC breaking capacity at rated voltage. The L50S275.V provides 20kA DC breaking capacity at rated voltage. Both deliver 200kA AC breaking capacity. DC breaking capacity selection depends on your system's fault current characteristics.

Q: Do both parts carry the same regulatory certifications?

A: Yes. Both the FWH-275A and L50S275.V carry CE, CSA, and UR approvals, ensuring compliance with international electrical safety standards.