Eaton HRF Fuse Holder Cartridge 32V 20A In-Line

Part Overview

The Eaton HRF is a cartridge fuse holder rated for 20 A at 32V, designed for free-hanging in-line mounting applications. This component accommodates 1AG cartridge fuses with dimensions of 0.25" diameter by 0.625" length (6.35mm x 15.88mm). The HRF maintains active product status and is available in bulk packaging with 875 pieces in current inventory. Alternative models may be required when application constraints, compliance requirements, or supply considerations necessitate substitution while maintaining electrical and mechanical compatibility.

Substiute Parts

HRF

Eaton - Electronics DivisionIn Stock: 973HRF Datasheet

Current PartRFQ

01550004ZXA

Littelfuse Inc.In Stock: 110701550004ZXA Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Eaton HRF is determined by strict alignment of the following critical parameters:

Mechanical Compatibility Requirements:

• Fuse size: 0.25" diameter x 0.625" length (6.35mm x 15.88mm)
• Mounting type: Free hanging (in-line)
• Termination style: Wire leads
• Number of circuits: 1

Electrical Compatibility Requirements:

• Voltage rating: 32V
• Fuse type: Cartridge
• Fuseholder type: Holder

Substitution Constraint: The Littelfuse 01550004ZXA meets all mechanical and electrical compatibility criteria. However, the current rating differs: the HRF is rated for 20 A while the 01550004ZXA is rated for 4 A. Current rating is an application-specific parameter that determines circuit protection characteristics. Substitution is valid only when the application circuit requires 4 A protection or lower.

Parameter Comparison

Engineering Selection Recommendations

Eaton HRF Selection Criteria: The Eaton HRF is the primary choice for applications requiring 20 A circuit protection at 32V with 1AG cartridge fuse accommodation. The part maintains active product status and is available in substantial inventory. Selection is appropriate when the application circuit design specifies 20 A protection and RoHS compliance is not a project requirement.

Littelfuse 01550004ZXA Selection Criteria: The Littelfuse 01550004ZXA is suitable only for applications requiring 4 A circuit protection at 32V. This substitute provides ROHS3 compliance, which may be required for projects with environmental or regulatory mandates. The identical mechanical form factor (0.25" x 0.625" cartridge, free-hanging in-line mounting, wire leads) ensures physical and electrical socket compatibility. Selection of this substitute requires confirmation that the application circuit protection requirement is 4 A or lower.

Compliance Consideration: The Eaton HRF is RoHS non-compliant. The Littelfuse 01550004ZXA is ROHS3 compliant. If RoHS compliance is mandatory for the application, substitution to the Littelfuse part is necessary only if the 4 A current rating aligns with circuit protection requirements.

Frequently Asked Questions (FAQ)

Q: Can the Littelfuse 01550004ZXA directly replace the Eaton HRF in any application?

A: Physical and electrical socket compatibility exists due to identical fuse size (0.25" x 0.625"), voltage rating (32V), mounting type (free-hanging in-line), and termination style (wire leads). However, the current rating differs: HRF is 20 A and 01550004ZXA is 4 A. Substitution is valid only when the application circuit requires 4 A protection or lower. Using a 4 A holder in a 20 A circuit application is not appropriate.

Q: What is the significance of the fuse size specification 0.25" Dia x 0.625" L?

A: This dimension specifies the cartridge fuse form factor, commonly designated as 1AG or 1/4" x 5/8". Both the Eaton HRF and Littelfuse 01550004ZXA accommodate this standard cartridge size. Fuse holders and fuses must match this specification for proper mechanical fit and electrical contact.

Q: Does the Littelfuse 01550004ZXA have different contact materials compared to the Eaton HRF?

A: The Littelfuse 01550004ZXA specifies brass contact material with tin finish. The Eaton HRF does not provide contact material or finish specifications in the available documentation. Both parts are designed for the same 1AG cartridge fuse interface and 32V voltage environment.

Q: What does RoHS compliance status mean for these fuse holders?

A: The Eaton HRF is RoHS non-compliant, indicating it may contain restricted substances such as lead. The Littelfuse 01550004ZXA is ROHS3 compliant, meeting current European Union Restriction of Hazardous Substances directives. RoHS compliance is a regulatory requirement for many applications, particularly in consumer electronics and EU markets.

Q: Are both parts available in the same packaging format?

A: Both the Eaton HRF and Littelfuse 01550004ZXA are supplied in bulk packaging. The HRF has 875 pieces in current inventory, while the 01550004ZXA has 1060 pieces available. Bulk packaging is standard for cartridge fuse holder components.

Q: What mounting orientation do these fuse holders support?

A: Both the Eaton HRF and Littelfuse 01550004ZXA are designed for free-hanging in-line mounting with wire lead termination. This configuration allows the fuse holder to be suspended in the circuit path without requiring a panel or chassis mount. The wire leads provide direct connection to the circuit.