Littelfuse 0FHM0002Z Blade Fuse Holder Equivalent & Substitute Parts

Part Overview

The Littelfuse 0FHM0002Z is a blade fuse holder designed for 20 A at 32V operation in single-circuit configurations. This component features a free-hanging (in-line) mounting style with wire lead termination, compatible with miniature (ATM) blade fuses. The product is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing system maintenance and new design implementations.

Substiute Parts

0FHM0002Z

Littelfuse Inc.In Stock: 7030FHM0002Z Datasheet

Current PartRFQ

HHM

Eaton - Bussmann Electrical DivisionIn Stock: 1072HHM Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Littelfuse 0FHM0002Z is determined by the following critical parameters:

• Fuse Type & Size: Must accommodate miniature (ATM) blade fuses at 0.433" L x 0.152" W (11.00mm x 3.85mm)
• Voltage Rating: Minimum 32V to maintain electrical safety margins
• Mounting Configuration: Free hanging (in-line) with wire lead termination
• Number of Circuits: Single-circuit operation
• Termination Interface: Wire leads for direct circuit integration

The Eaton - Bussmann HHM series meets these substitution criteria. While the HHM carries a higher current rating of 24 A compared to the original 20 A specification, it maintains compatibility with the same fuse form factor, voltage class, and mounting architecture. The elevated current rating does not compromise functionality in applications designed for the 0FHM0002Z, as the fuse holder itself is rated for the higher capacity.

Parameter Comparison

Engineering Selection Recommendations

The Eaton - Bussmann HHM serves as the primary substitute for the obsolete Littelfuse 0FHM0002Z. Selection is justified on the following basis:

Product Status: The HHM maintains active production status, ensuring long-term availability and supply chain continuity compared to the obsolete 0FHM0002Z.

Regulatory Compliance: Both components satisfy RoHS requirements. The HHM carries current RoHS compliance certification, while the 0FHM0002Z meets ROHS3 specifications. Both are suitable for applications requiring environmental compliance.

Mechanical & Electrical Compatibility: The HHM preserves the identical fuse form factor (11.00mm x 3.85mm), voltage rating (32V), circuit configuration (single), and termination method (wire leads). These parameters ensure direct functional replacement without circuit redesign.

Current Rating Differential: The HHM's 24 A rating exceeds the original 20 A specification. This elevation does not introduce incompatibility; the fuse holder component itself is rated for the higher capacity. Circuit protection remains determined by the installed fuse element, not the holder rating.

Frequently Asked Questions (FAQ)

Q: Can the Eaton - Bussmann HHM directly replace the Littelfuse 0FHM0002Z without circuit modification?

A: Yes. Both components share identical mechanical mounting (free hanging, in-line), electrical termination (wire leads), fuse accommodation (miniature ATM blade, 11.00mm x 3.85mm), voltage rating (32V), and circuit count (single). Direct substitution is supported.

Q: Why does the HHM have a higher current rating (24 A vs. 20 A)?

A: The fuse holder component is rated for the maximum current it can safely conduct. The actual circuit protection level is determined by the fuse element installed in the holder, not the holder's rating. A 20 A fuse installed in a 24 A-rated holder provides the same protection as the original configuration.

Q: Are there packaging or inventory considerations for the HHM?

A: The HHM is in active production with 977 pieces available in new original stock, compared to 686 pieces of the obsolete 0FHM0002Z. Active status ensures consistent availability for future procurement.

Q: Do both components meet regulatory requirements for new designs?

A: The HHM carries current RoHS compliance certification and is suitable for new product designs. The 0FHM0002Z, while ROHS3 compliant, is obsolete and not recommended for new implementations.

Q: What is the physical form factor compatibility between these holders and miniature blade fuses?

A: Both the 0FHM0002Z and HHM accommodate miniature (ATM) blade fuses with dimensions of 0.433" length by 0.152" width (11.00mm x 3.85mm). This standardized form factor ensures interchangeability of fuse elements across both holder designs.