Littelfuse 03420001Z Fuse Holder Cartridge – Equivalent & Substitute Parts

Part Overview

The Littelfuse 03420001Z is a cartridge fuse holder rated for 250VAC at 20A with panel mount configuration. This component is classified as Obsolete and is no longer in active production. Due to its obsolete status, sourcing original units becomes increasingly difficult. The substitute part 03453LF3HXLN provides functional equivalence while maintaining current product availability and compliance certifications.

Substiute Parts

03420001Z

Littelfuse Inc.In Stock: 106603420001Z Datasheet

Current PartRFQ

03453LF3HXLN

Littelfuse Inc.In Stock: 93303453LF3HXLN Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The substitute part 03453LF3HXLN is classified as an equivalent based on the following matching parameters:

• Voltage Rating: Both parts are rated for 250V operation
• Current Rating: Both parts are rated for 20A
• Fuse Type: Both are cartridge fuse holders
• Mounting Configuration: Both feature panel mount installation
• Circuit Count: Both accommodate 1 circuit
• Termination: Both utilize Quick Connect termination (0.187" / 4.7mm)
• Compliance: Both maintain ROHS3 compliance and REACH unaffected status

The primary distinction is product status: the main part is obsolete while the substitute is active production, ensuring continued availability and supply chain reliability.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection: The Littelfuse 03453LF3HXLN is the appropriate substitute for the obsolete 03420001Z. Both components share identical electrical specifications (250V, 20A) and mechanical mounting characteristics (panel mount, quick connect termination). The substitute maintains equivalent compliance certifications (ROHS3 Compliant, REACH Unaffected).

Compliance Assurance: Both parts satisfy ROHS3 requirements and are unaffected by REACH regulations, ensuring regulatory compliance in applications requiring these certifications.

Supply Chain Continuity: The substitute part is in active production status with documented inventory availability (908 Pcs), whereas the main part is obsolete. Selection of the active substitute ensures long-term component availability and eliminates obsolescence risk.

Frequently Asked Questions (FAQ)

Q: Can the 03453LF3HXLN directly replace the 03420001Z in existing applications?

A: Yes. Both components share identical voltage (250V), current (20A), mounting type (panel mount), and termination specifications (Quick Connect - 0.187"). The electrical and mechanical interfaces are equivalent.

Q: What is the fuse size compatibility for these holders?

A: The 03453LF3HXLN accommodates 3AG and 1/4" x 1-1/4" (SFE-20) cartridge fuses. This specification applies to the substitute part; verify fuse compatibility with your specific application requirements.

Q: Are there any compliance differences between the two parts?

A: No. Both parts maintain ROHS3 compliance and REACH unaffected status. There are no compliance barriers to substitution.

Q: What is the packaging difference?

A: The 03420001Z packaging specification is not provided in available documentation. The 03453LF3HXLN is supplied in bulk packaging. Confirm packaging requirements for your procurement process.

Q: Why is the main part listed as obsolete?

A: The 03420001Z has reached end-of-life status in Littelfuse's product portfolio. The 03453LF3HXLN represents the current active equivalent within the 345 series product line.

Q: Are the contact materials identical?

A: The main part contact material is not specified in available data. The substitute features copper alloy contacts with tin finish, which is standard for cartridge fuse holders in this voltage and current class.