FWH-80A Equivalent & Substitute Parts

Part Overview

The FWH-80A is an 80A 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 (200kA AC, 50kA DC) and is currently in active production status. Substitute parts are identified when equivalent electrical ratings, mechanical compatibility, and regulatory certifications align with the original specification.

Substiute Parts

FWH-80A

Eaton - Bussmann Electrical DivisionIn Stock: 1153FWH-80A Datasheet

Current PartRFQ

L50S080.T

Littelfuse Inc.In Stock: 758L50S080.T Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the FWH-80A is determined by the following critical parameters:

• Current Rating: Must be 80A
• Voltage Rating - AC: Must be 500 VAC minimum
• Voltage Rating - DC: Must be 500 VDC or higher
• Fuse Type: Must be Cartridge
• Mounting Type: Must be Bolt Mount
• Package / Case: Must be Cylindrical with Blade Terminal (Bolt)
• Approval Agency: Must include CE, CSA, and UR certifications
• RoHS Compliance: Must meet RoHS requirements

The L50S080.T from Littelfuse Inc. meets the current rating, AC voltage, fuse type, mounting configuration, and regulatory certifications. However, the DC voltage rating is 450 VDC, which is below the 500 VDC specification of the main part. The breaking capacity at rated voltage also differs: 200kA AC and 20kA DC compared to 200kA AC and 50kA DC for the FWH-80A.

Parameter Comparison

Engineering Selection Recommendations

Both the FWH-80A and L50S080.T are active production components with CE, CSA, and UR regulatory certifications. The FWH-80A maintains full specification compliance for 500 VDC applications with 50kA DC breaking capacity. The L50S080.T is rated for 450 VDC with 20kA DC breaking capacity, representing a reduction in both DC voltage and breaking capacity ratings. Selection between these components depends on the specific application voltage and fault current requirements. Both components meet RoHS compliance standards and are available in production quantities.

Frequently Asked Questions (FAQ)

Q: Can the L50S080.T replace the FWH-80A in all applications?

A: The L50S080.T matches the FWH-80A in current rating (80A), AC voltage (500 VAC), fuse type (Cartridge), mounting configuration (Bolt Mount), and regulatory certifications (CE, CSA, UR). However, the DC voltage rating is 450 VDC versus 500 VDC, and the DC breaking capacity is 20kA versus 50kA. Substitution is only appropriate for applications operating at 450 VDC or lower with fault currents not exceeding 20kA DC.

Q: Are the physical dimensions compatible between these parts?

A: Both components use Cylindrical, Blade Terminal (Bolt) packaging. The L50S080.T has documented dimensions of 1.000" Dia x 2.126" L (25.40mm x 54.00mm). Mechanical compatibility should be verified against the specific mounting hardware and enclosure design.

Q: What is the difference in response time between these fuses?

A: The L50S080.T is specified as Fast Blow. The FWH-80A response time specification is not provided in the available data.

Q: Do both parts meet current RoHS requirements?

A: Yes. The FWH-80A is RoHS Compliant, and the L50S080.T is ROHS3 Compliant, indicating both meet current environmental compliance standards.

Q: What are the breaking capacity differences and why do they matter?

A: The FWH-80A provides 200kA AC and 50kA DC breaking capacity at rated voltage. The L50S080.T provides 200kA AC and 20kA DC breaking capacity. Breaking capacity determines the maximum fault current the fuse can safely interrupt. Applications with higher DC fault currents require the higher breaking capacity of the FWH-80A.