Equivalent & Substitute Parts: HCM Fuse Holder

Part Overview

The HCM is a fuse circuit holder manufactured by Eaton - Electronics Division, designed for fuse circuit protection applications. This component is classified as a bus fuse holder and is actively produced with full RoHS compliance. The HCM maintains an active product status with 992 units in current inventory stock.

Substitute parts are identified when they satisfy the core electrical and mechanical parameters required for fuse holder functionality, including voltage rating, current capacity, fuse type compatibility, mounting configuration, and termination style. Alternative components become necessary when the primary part reaches end-of-life status, experiences supply constraints, or when design requirements necessitate equivalent functionality from alternative manufacturers.

Substiute Parts

HCM

Eaton - Electronics DivisionIn Stock: 1022HCM Datasheet

Current PartRFQ

03420838H

Littelfuse Inc.In Stock: 233503420838H Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute part identification for the HCM fuse holder is based on the following critical parameters that determine functional equivalence:

Electrical Parameters:

• Voltage rating (250V)
• Current rating (20A)
• Number of circuits (1)
• Fuse type compatibility (Cartridge)

Mechanical Parameters:

• Fuse size (0.25" Dia x 1.26" L / 6.35mm x 32mm)
• Mounting type (Panel Mount)
• Termination style (Quick Connect - 0.250")
• Contact material and finish specifications

Compliance Parameters:

• RoHS compliance status
• ECCN and HTSUS classification alignment
• Moisture sensitivity level

The substitute part 03420838H from Littelfuse Inc. satisfies these core parameters, enabling direct functional replacement in applications requiring a 20A, 250V single-circuit cartridge fuse holder with panel mount configuration and quick connect termination.

Parameter Comparison

Engineering Selection Recommendations

Both the HCM and 03420838H maintain active product status with full regulatory compliance. The HCM is manufactured by Eaton - Electronics Division and carries RoHS Compliant certification with MSL Level 1 (Unlimited moisture sensitivity). The 03420838H substitute from Littelfuse Inc. carries ROHS3 Compliant certification with Not Applicable MSL designation.

Both components share identical ECCN (EAR99) and HTSUS (8538.90.8180) classifications, confirming regulatory alignment for export and tariff purposes. The 03420838H provides equivalent fuse holder functionality with specified electrical parameters of 20A at 250V, single-circuit cartridge configuration, panel mount orientation, and quick connect 0.250" termination.

Selection between these components should be based on manufacturer preference, supply availability, and existing design documentation requirements. The 03420838H currently maintains higher inventory availability at 2276 units compared to 992 units for the HCM.

Frequently Asked Questions (FAQ)

Q: What determines if a fuse holder can substitute for the HCM?

A: Substitution eligibility is determined by matching the following parameters: voltage rating, current rating, number of circuits, fuse type (cartridge), fuse size dimensions, mounting configuration (panel mount), termination style (quick connect), and regulatory compliance status (RoHS, ECCN, HTSUS).

Q: Is the 03420838H electrically equivalent to the HCM?

A: The 03420838H satisfies the core electrical parameters for fuse holder substitution with 20A current rating at 250V, single-circuit cartridge fuse type, and quick connect termination. Both components share identical ECCN and HTSUS classifications.

Q: What is the difference in RoHS compliance between these parts?

A: The HCM carries RoHS Compliant certification, while the 03420838H carries ROHS3 Compliant certification. Both designations indicate compliance with Restriction of Hazardous Substances regulations; ROHS3 represents the current revision standard.

Q: Are there packaging differences between the HCM and 03420838H?

A: Both components are supplied in Bulk packaging configuration. No packaging format differences exist between these alternatives.

Q: What is the significance of MSL Level 1 for the HCM?

A: MSL Level 1 (Unlimited) indicates that the HCM has no moisture sensitivity restrictions and does not require special handling, storage, or baking procedures prior to assembly or use.

Q: Can I use the 03420838H as a direct replacement in existing designs specified for HCM?

A: The 03420838H provides functional equivalence based on electrical and mechanical parameters. Design validation should confirm compatibility with existing PCB layouts, connector interfaces, and mechanical mounting provisions.

Q: What inventory considerations should influence component selection?

A: The 03420838H maintains higher current inventory (2276 units) compared to the HCM (992 units), which may impact lead time and supply chain planning for high-volume production requirements.