FWH-004A6F Equivalent & Substitute Parts

Part Overview

The FWH-004A6F is a 4A cartridge fuse manufactured by Eaton - Bussmann Electrical Division, rated for 500 VAC and 600 VDC operation. This component is designed for electrical and industrial applications requiring overcurrent protection in holder-based installations. The part maintains Active product status with 794 units in current inventory. Substitute parts are identified when equivalent electrical ratings, mechanical dimensions, and package compatibility align with the original specification, enabling direct replacement in existing fuse holder assemblies.

Substiute Parts

FWH-004A6F

Eaton - Bussmann Electrical DivisionIn Stock: 893FWH-004A6F Datasheet

Current PartRFQ

AHC-4-R

Eaton - Electronics DivisionIn Stock: 933AHC-4-R Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the FWH-004A6F is determined by the following critical parameters:

• Current Rating: 4A (exact match required)
• Voltage Rating - AC: Minimum 500 VAC (equal or higher acceptable)
• Voltage Rating - DC: Minimum 600 VDC (equal or higher acceptable)
• Package / Case: 3AB, 3AG, 1/4" x 1-1/4" (mechanical compatibility with existing holders)
• Fuse Type: Cartridge (holder-based installation requirement)
• Mounting Type: Requires Holder (installation method compatibility)

The substitute part AHC-4-R meets these criteria with a 4A current rating, 600 VAC AC rating, cartridge type, and identical package dimensions. The AC voltage rating of 600 VAC exceeds the original 500 VAC specification, providing equivalent or superior performance in AC applications. Both parts are manufactured by Eaton divisions and maintain Active product status.

Parameter Comparison

Engineering Selection Recommendations

Both the FWH-004A6F and AHC-4-R are Active products manufactured by Eaton with current inventory availability. Selection between these parts depends on application-specific requirements:

The FWH-004A6F provides higher breaking capacity (50kA AC/DC) and dual voltage certification (CE, CSA, UR), making it suitable for applications requiring maximum fault protection and multi-regional compliance.

The AHC-4-R offers ceramic construction with Fast Blow response characteristics and UL certification, appropriate for applications where rapid response to overcurrent conditions is required and UL compliance is the primary regulatory requirement.

Both parts share identical package dimensions and current ratings, ensuring mechanical and electrical compatibility within standard 3AB/3AG fuse holders. Dimensional tolerance between parts is minimal (0.002" diameter, 0.002" length), presenting no practical installation concerns.

Frequently Asked Questions (FAQ)

Q: Can AHC-4-R directly replace FWH-004A6F in existing installations?

A: Direct replacement is mechanically feasible due to identical package specifications (3AB, 3AG, 1/4" x 1-1/4") and matching 4A current ratings. However, application voltage requirements and regulatory certifications must be verified. The AHC-4-R AC voltage rating of 600 VAC exceeds the FWH-004A6F specification of 500 VAC, providing equivalent or superior performance in AC circuits. DC applications require confirmation, as the AHC-4-R DC voltage rating is not specified.

Q: What are the key differences in breaking capacity?

A: The FWH-004A6F provides 50kA breaking capacity at rated voltage for both AC and DC. The AHC-4-R provides 10kA breaking capacity. Breaking capacity determines the maximum fault current the fuse can safely interrupt. Applications with fault currents exceeding 10kA require the FWH-004A6F.

Q: How do response time characteristics differ?

A: The FWH-004A6F response time is not specified in available data. The AHC-4-R is rated as Fast Blow, indicating rapid response to overcurrent conditions. Fast Blow fuses are suitable for circuits sensitive to transient overcurrents and requiring immediate protection response.

Q: Are both parts RoHS compliant?

A: Yes. The FWH-004A6F is RoHS Compliant. The AHC-4-R is ROHS3 Compliant. Both meet current RoHS requirements for electrical and electronic equipment.

Q: Which certifications apply to each part?

A: The FWH-004A6F holds CE, CSA, and UR certifications, supporting multi-regional deployment. The AHC-4-R holds UL certification, appropriate for applications requiring UL compliance. Regulatory requirements of the target application determine certification necessity.