FWH-200B Equivalent & Substitute Parts

Part Overview

The FWH-200B is a 200A cartridge fuse rated for 500 VAC and 500 VDC operation, manufactured by Eaton - Bussmann Electrical Division. This component is designed for electrical and industrial applications requiring high-current protection in systems operating at elevated voltage levels. The part maintains Active product status with 807 units currently in stock. Substitute parts are identified when equivalent electrical ratings and mechanical compatibility are maintained across the specified parameters.

Substiute Parts

FWH-200B

Eaton - Bussmann Electrical DivisionIn Stock: 824FWH-200B Datasheet

Current PartRFQ

L50S200.V

Littelfuse Inc.In Stock: 1011L50S200.V Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the FWH-200B are identified based on the following critical parameters that must align for functional equivalence:

• Current Rating: 200A (exact match required)
• Voltage Rating - AC: 500 VAC (exact match required)
• Fuse Type: Cartridge (exact match required)
• Package / Case: Cylindrical, Blade Terminal (Bolt) (exact match required)

The L50S200.V from Littelfuse Inc. qualifies as a substitute based on matching current rating, AC voltage rating, fuse type, and package configuration. Variations in DC voltage rating (450 VDC vs. 500 VDC), breaking capacity, physical dimensions, and response time characteristics do not preclude substitution when the primary electrical and mechanical parameters align with system requirements.

Parameter Comparison

Engineering Selection Recommendations

Both the FWH-200B and L50S200.V maintain Active product status and carry relevant regulatory approvals (CE, UR). The L50S200.V provides additional CSA certification. Both components are RoHS compliant, meeting environmental compliance requirements.

Selection between these parts should account for the following provided specifications:

• DC voltage rating differential: The FWH-200B supports 500 VDC while the L50S200.V is rated for 450 VDC. System DC operating voltage must not exceed 450 VDC when using the L50S200.V.
• Breaking capacity at rated voltage: The FWH-200B provides 50kA DC breaking capacity versus 20kA DC for the L50S200.V. Applications requiring higher DC fault current interruption capability should specify the FWH-200B.
• Physical dimensions: The L50S200.V is larger (1.220" Dia x 2.126" L) compared to the FWH-200B (1.156" Dia x 1.836" L). Holder or mounting cavity dimensions must accommodate the substitute part.

Frequently Asked Questions (FAQ)

Q: Can the L50S200.V replace the FWH-200B in all applications?

A: The L50S200.V is electrically equivalent for 200A AC circuits at 500 VAC. However, if your system operates at 500 VDC, the L50S200.V (rated 450 VDC maximum) is not suitable. Additionally, if your application requires 50kA DC breaking capacity, the L50S200.V (20kA DC) may not meet fault current requirements.

Q: What is the difference between "Requires Holder" and "Bolt Mount"?

A: Both parts use cylindrical blade terminal (bolt) packages. The FWH-200B designation "Requires Holder" indicates it must be installed in a compatible fuse holder assembly. The L50S200.V "Bolt Mount" designation indicates direct bolt connection capability. Physical dimensions and holder compatibility must be verified before substitution.

Q: Are both parts RoHS compliant?

A: Yes. The FWH-200B is RoHS Compliant, and the L50S200.V is ROHS3 Compliant. Both meet environmental compliance standards.

Q: What certifications do these fuses carry?

A: The FWH-200B carries CE and UR approvals. The L50S200.V carries CE, CSA, and UR approvals. Both meet recognized safety standards for electrical components.

Q: Does response time affect substitution?

A: The FWH-200B response time is not specified in the provided data. The L50S200.V is specified as Fast Blow. If your circuit design depends on a specific response time characteristic, this parameter must be verified against system requirements before substitution.