HFA-HH-R Cartridge Fuse Holder 250V 20A Equivalent & Substitute Parts

Part Overview

The HFA-HH-R is an active-status cartridge fuse holder manufactured by Eaton - Electronics Division, designed for 20 A circuits at 250V with free-hanging (in-line) mounting configuration. This component accommodates 0.25" diameter by 1.26" length cartridge fuses and features quick-connect termination for 0.250" (6.3mm) contacts. The part is RoHS Compliant and carries MSL Level 1 (Unlimited) moisture sensitivity rating. Equivalent substitute parts are identified based on matching electrical specifications, mechanical dimensions, termination style, and compliance certifications to ensure direct functional interchangeability in circuit protection applications.

Substiute Parts

HFA-HH-R

Eaton - Electronics DivisionIn Stock: 798HFA-HH-R Datasheet

Current PartRFQ

BK/HFA-HH-R

Eaton - Electronics DivisionIn Stock: 1071BK/HFA-HH-R Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the HFA-HH-R is determined by strict equivalence across the following critical parameters:

Electrical Parameters: Current rating (20 A), voltage rating (250V), and number of circuits (1) must match exactly. These parameters define the fuse holder's load-carrying capacity and insulation requirements.

Mechanical Parameters: Fuse size (0.25" Dia x 1.26" L / 6.35mm x 32mm), mounting type (Free Hanging / In-Line), and termination style (Quick Connect - 0.250" / 6.3mm) must be identical to ensure physical and electrical compatibility with circuit board layouts and mating connectors.

Material & Contact Specifications: Contact material (Copper) and contact finish (Tin) ensure consistent electrical performance and corrosion resistance.

Compliance & Environmental: RoHS compliance status and MSL Level 1 rating confirm suitability for regulated markets and standard storage conditions.

The substitute part BK/HFA-HH-R meets all these criteria and is therefore classified as a direct equivalent.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection: HFA-HH-R remains the baseline reference part with active product status and RoHS Compliant certification. Current inventory of 747 pieces supports immediate procurement.

Substitute Selection: BK/HFA-HH-R is a direct functional equivalent with identical electrical and mechanical specifications. The part carries ROHS3 Compliant certification, which represents an updated compliance standard and is fully compatible with RoHS Compliant applications. Higher inventory availability (1034 pieces) may support extended production schedules. REACH Unaffected status confirms no additional regulatory restrictions.

Both parts are manufactured by Eaton - Electronics Division within the HFA series and are suitable for interchangeable use in 20 A, 250V single-circuit cartridge fuse holder applications with free-hanging in-line mounting and quick-connect termination.

Frequently Asked Questions (FAQ)

Q: Can BK/HFA-HH-R be used as a direct replacement for HFA-HH-R?

A: Yes. Both parts are identical in all critical electrical parameters (20 A, 250V, 1 circuit), mechanical dimensions (0.25" Dia x 1.26" L), mounting configuration (free-hanging in-line), and termination style (quick-connect 0.250"). The difference in RoHS certification level (RoHS Compliant vs. ROHS3 Compliant) does not affect functional interchangeability.

Q: What fuse types are compatible with these holders?

A: Both HFA-HH-R and BK/HFA-HH-R accommodate 3AG cartridge fuses with dimensions 1/4" x 1-1/4" (SFE-20 specification).

Q: Are there any differences in contact material or finish between the two parts?

A: No. Both parts feature copper contacts with tin finish, ensuring identical electrical conductivity and corrosion resistance characteristics.

Q: What is the significance of the MSL Level 1 rating?

A: MSL Level 1 (Unlimited) indicates that these fuse holders have unlimited shelf life and require no special moisture-controlled storage conditions, making them suitable for standard warehouse and field inventory management.

Q: Does the ROHS3 Compliant status of BK/HFA-HH-R affect compatibility with existing designs?

A: No. ROHS3 Compliant is an updated certification standard that maintains full backward compatibility with RoHS Compliant applications. The part meets or exceeds all original compliance requirements.

Q: Are both parts available in bulk packaging?

A: Yes. Both HFA-HH-R and BK/HFA-HH-R are supplied in bulk packaging, with current inventory of 747 and 1034 pieces respectively.