FWH-100B Equivalent & Substitute Parts

Part Overview

The FWH-100B is a 100A cartridge fuse rated for 500 VAC and 500 VDC operation, designed for bolt mount installation in electrical and industrial applications. Manufactured by Eaton - Bussmann Electrical Division, this component is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain system functionality and ensure continued availability for replacement and new installations.

Substiute Parts

FWH-100B

Eaton - Bussmann Electrical DivisionIn Stock: 1068FWH-100B Datasheet

Current PartRFQ

FWH-100BC

Eaton - Bussmann Electrical DivisionIn Stock: 952FWH-100BC Datasheet

MFR RecommendedRFQ

L50S100.T

Littelfuse Inc.In Stock: 1006L50S100.T Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the FWH-100B are identified based on strict electrical and mechanical parameter alignment. The primary substitution criteria are:

• Current Rating: 100A (exact match required)
• Voltage Rating - AC: 500 VAC (exact match required)
• Voltage Rating - DC: 500 VDC or higher (equal or greater acceptable)
• Fuse Type: Cartridge (exact match required)
• Mounting Type: Bolt Mount (exact match required)
• Package / Case: Cylindrical, Blade Terminal (Bolt) (exact match required)
• Breaking Capacity @ Rated Voltage: 200kA AC minimum (equal or greater acceptable)
• Melting I²t: 475 (exact match required)

Two substitute parts meet these criteria: FWH-100BC (manufacturer recommended) and L50S100.T (similar alternative).

Parameter Comparison

Engineering Selection Recommendations

FWH-100BC is the manufacturer-recommended substitute for FWH-100B. Both components are manufactured by Eaton - Bussmann Electrical Division and share identical electrical ratings (100A, 500 VAC, 500 VDC) and breaking capacity specifications (200kA AC, 50kA DC). FWH-100BC is currently in active production status, whereas FWH-100B is obsolete. FWH-100BC carries UL certification in addition to CE and CSA approvals, and meets ROHS3 compliance requirements.

L50S100.T, manufactured by Littelfuse Inc., is a similar alternative that meets the 100A and 500 VAC requirements. However, its DC voltage rating is 450 VDC, which is lower than the FWH-100B specification of 500 VDC. Additionally, the breaking capacity at rated voltage for DC is 20kA, compared to 50kA for FWH-100B. L50S100.T is suitable only for applications where the DC voltage requirement does not exceed 450 VDC and where the lower DC breaking capacity is acceptable.

Frequently Asked Questions (FAQ)

Q: Can FWH-100BC directly replace FWH-100B?

A: Yes. FWH-100BC is the manufacturer-recommended substitute and shares identical electrical specifications (100A, 500 VAC, 500 VDC), breaking capacity (200kA AC, 50kA DC), and melting I²t rating (475). Both use bolt mount cylindrical blade terminal packaging. FWH-100BC is the active production equivalent.

Q: What are the limitations of L50S100.T as a substitute?

A: L50S100.T has a reduced DC voltage rating of 450 VDC compared to the FWH-100B specification of 500 VDC. The DC breaking capacity is also lower at 20kA versus 50kA. L50S100.T is suitable only for applications where DC voltage does not exceed 450 VDC and where the lower DC breaking capacity meets system requirements.

Q: Are there physical dimension differences between these parts?

A: Yes. FWH-100B measures 0.947" Dia x 3.625" L (24.05mm x 92.08mm). FWH-100BC measures 0.950" Dia x 1.740" L (24.13mm x 44.20mm). L50S100.T measures 1.000" Dia x 2.126" L (25.40mm x 54.00mm). Physical dimensions must be verified for mechanical fit in the installation location.

Q: What certifications apply to each part?

A: FWH-100B carries CE, CSA, and UR approvals. FWH-100BC carries CE, CSA, and UL approvals. L50S100.T carries CE, CSA, and UR approvals. System requirements may specify which certification bodies are required.

Q: Are all substitute parts RoHS compliant?

A: FWH-100B is RoHS Compliant. FWH-100BC and L50S100.T are both ROHS3 Compliant, meeting current RoHS requirements.