FWH-175A Equivalent & Substitute Parts

Part Overview

The FWH-175A is a 175A 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 electrical and industrial applications requiring high-breaking capacity protection (200kA AC, 50kA DC). The part maintains Active product status and carries multiple international approvals (CE, CSA, UR). Substitute parts are identified when equivalent electrical ratings, mechanical compatibility, and approval certifications align with the original specification.

Substiute Parts

FWH-175A

Eaton - Bussmann Electrical DivisionIn Stock: 902FWH-175A Datasheet

Current PartRFQ

L50S175.V

Littelfuse Inc.In Stock: 949L50S175.V Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the FWH-175A is determined by the following critical parameters:

• Current Rating: Must be 175A
• Voltage Rating - AC: Must be 500 VAC minimum
• Voltage Rating - DC: Must support the application requirement (500 VDC for FWH-175A)
• Fuse Type: Must be Cartridge
• Mounting Type: Must be Bolt Mount
• Package / Case: Must be Cylindrical with Blade Terminal (Bolt)
• Approval Certifications: Must include CE, CSA, and UR

The L50S175.V meets the current rating, AC voltage, fuse type, mounting configuration, and package requirements. However, the DC voltage rating differs (450 VDC vs. 500 VDC), and breaking capacity specifications vary. These differences must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

Both the FWH-175A and L50S175.V maintain Active product status and carry identical international approvals (CE, CSA, UR). Both components are RoHS compliant and share identical current ratings, AC voltage ratings, fuse type, mounting configuration, and package specifications.

The primary technical difference is the DC voltage rating: the FWH-175A is rated for 500 VDC while the L50S175.V is rated for 450 VDC. Additionally, the breaking capacity at rated voltage differs in DC applications (50kA vs. 20kA). Selection between these parts must be based on the specific DC voltage and fault current requirements of the application circuit.

Frequently Asked Questions (FAQ)

Q: Can the L50S175.V replace the FWH-175A in all applications?

A: The L50S175.V is mechanically and electrically compatible for AC applications and DC applications up to 450 VDC. If the application requires 500 VDC operation, the FWH-175A is the appropriate choice. If the application operates at 450 VDC or lower, the L50S175.V is suitable.

Q: Are the physical dimensions identical?

A: The L50S175.V dimensions are specified as 1.220" Dia x 2.126" L (31.00mm x 54.00mm). The FWH-175A dimensions are not provided in the available data. Physical verification is necessary before installation.

Q: Do both parts have the same breaking capacity?

A: Both parts have 200kA AC breaking capacity. The DC breaking capacity differs: FWH-175A is rated 50kA DC, while L50S175.V is rated 20kA DC. Application fault current levels must be evaluated against these specifications.

Q: What is the difference between standard and Fast Blow response?

A: The L50S175.V is specified as Fast Blow response. The FWH-175A response time is not specified in the available data. Response time affects the speed at which the fuse opens under overcurrent conditions and must align with circuit protection requirements.

Q: Are both parts RoHS compliant?

A: Yes. The FWH-175A is RoHS Compliant, and the L50S175.V is ROHS3 Compliant. Both meet current RoHS requirements.