FWH-6.30A6F Equivalent & Substitute Parts

Part Overview

The FWH-6.30A6F is a 6.3A 500VAC cartridge fuse manufactured by Eaton - Bussmann Electrical Division. This fuse is designed for electrical and industrial applications requiring a cartridge-style holder mount. The part is currently active in production with 890 units in stock. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the allowed parameter ranges for this fuse category.

Substiute Parts

FWH-6.30A6F

Eaton - Bussmann Electrical DivisionIn Stock: 941FWH-6.30A6F Datasheet

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AHC-6-R

Eaton - Electronics DivisionIn Stock: 1001AHC-6-R Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the FWH-6.30A6F is determined by the following critical parameters:

• Current Rating: Substitute must be rated at or above 6.3A to maintain circuit protection integrity
• Voltage Rating (AC): Substitute must be rated at or above 500VAC for safe operation in the intended circuit
• Package / Case: Substitute must use 3AB or 3AG standard cartridge dimensions (1/4" x 1-1/4") to ensure mechanical fit in existing holders
• Fuse Type: Cartridge configuration required for holder compatibility
• Mounting Type: Requires Holder configuration mandatory

The AHC-6-R meets these substitution criteria with a 6A current rating (exceeds 6.3A requirement), 600VAC voltage rating (exceeds 500VAC requirement), and identical 3AB/3AG package dimensions.

Parameter Comparison

Engineering Selection Recommendations

The AHC-6-R is an active substitute for the FWH-6.30A6F based on matching mechanical package dimensions (3AB/3AG cartridge format) and exceeding the voltage rating requirement (600VAC vs. 500VAC). Both parts maintain active product status and RoHS compliance.

Selection between these parts must account for the following parameter differences:

• Current Rating Differential: The AHC-6-R is rated at 6A versus the FWH-6.30A6F at 6.3A. Circuit protection characteristics will differ; verify that 6A protection is acceptable for the intended application.
• Breaking Capacity: The FWH-6.30A6F provides 50kA breaking capacity compared to AHC-6-R at 10kA. High fault-current circuits may require the higher breaking capacity of the FWH-6.30A6F.
• Thermal Energy (I²t): The FWH-6.30A6F melting I²t of 36 exceeds the AHC-6-R at 24. Applications with specific thermal coordination requirements must verify compatibility.
• Certification: FWH-6.30A6F carries CE and CSA approvals; AHC-6-R carries UL approval. Confirm that the substitute certification meets regional and application-specific requirements.
• Response Characteristic: AHC-6-R is specified as fast-blow; FWH-6.30A6F response time is not specified. Verify that fast-blow response is compatible with the circuit design.

Frequently Asked Questions (FAQ)

Q: Can the AHC-6-R directly replace the FWH-6.30A6F in my circuit?

A: Mechanical compatibility is confirmed—both use identical 3AB/3AG cartridge dimensions and require standard holders. However, electrical performance differs. The AHC-6-R has a lower current rating (6A vs. 6.3A), lower breaking capacity (10kA vs. 50kA), and lower thermal energy (I²t 24 vs. 36). Substitution is valid only if your circuit design accepts these parameter changes.

Q: What is the difference between the FWH and AHC series?

A: The FWH-6.30A6F is a general-purpose cartridge fuse from Eaton's Bussmann division. The AHC-6-R is a ceramic cartridge fuse from Eaton's Electronics division. Both are cartridge-style fuses requiring holders, but they differ in material composition, response characteristics, and electrical ratings.

Q: Will the AHC-6-R fit in my FWH holder?

A: Yes. Both fuses use the standard 3AB/3AG cartridge package with 1/4" x 1-1/4" dimensions. Mechanical fit in standard cartridge holders is confirmed.

Q: Why does the AHC-6-R have a lower breaking capacity?

A: Breaking capacity is determined by fuse design and material. The AHC-6-R ceramic construction provides a 10kA breaking capacity, suitable for circuits with lower fault-current levels. The FWH-6.30A6F provides 50kA breaking capacity for higher fault-current applications. Select based on your circuit's maximum available fault current.

Q: Are both parts RoHS compliant?

A: Yes. The FWH-6.30A6F is RoHS Compliant; the AHC-6-R is ROHS3 Compliant. Both meet RoHS environmental requirements.

Q: What certifications does each part carry?

A: The FWH-6.30A6F carries CE and CSA approvals. The AHC-6-R carries UL approval. Verify that the substitute certification meets your regional and application requirements before selection.