Littelfuse 852/855 Cartridge Fuse Holder - Equivalent & Substitute Parts

Part Overview

The Littelfuse 852/855 is a through-hole mounted cartridge fuse holder rated for 12 A at 250V, designed for 5mm x 20mm fuses in single-circuit applications. This component is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement planning. The holder features vertical orientation with PC pin termination and copper alloy contacts finished in tin.

Substiute Parts

852/855

Littelfuse Inc.In Stock: 1079852/855 Datasheet

Current PartRFQ

3101.0045

SCHURTER Inc.In Stock: 11253101.0045 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The SCHURTER 3101.0045 qualifies as a functional substitute based on the following shared electrical and mechanical parameters:

• Fuse size compatibility: Both accommodate 5mm x 20mm cartridge fuses
• Mounting method: Both are through-hole mounted with vertical orientation
• Termination: Both use PC pin termination with copper alloy contacts finished in tin
• Circuit configuration: Both are single-circuit holders
• Contact material and finish: Identical specifications

The substitute part operates at higher electrical ratings (16 A at 500V versus 12 A at 250V), which provides design margin in applications where the original 852/855 is specified. The increased voltage and current ratings do not create incompatibility; they represent enhanced capability within the same mechanical and electrical interface family.

Parameter Comparison

Engineering Selection Recommendations

The SCHURTER 3101.0045 is the designated manufacturer-recommended substitute for the obsolete Littelfuse 852/855. Selection of this alternative is supported by:

• Active product status ensuring continued availability and supply chain stability
• ROHS3 compliance meeting current environmental and regulatory requirements
• Identical mechanical interface and fuse accommodation specifications
• Higher electrical ratings providing design margin without requiring circuit modification
• Equivalent contact material and termination technology

For applications where the original 12 A / 250V specification is critical, the 3101.0045 operates within these parameters while offering enhanced capability. No circuit redesign is required for direct substitution in through-hole PCB applications.

Frequently Asked Questions (FAQ)

Q: Can the SCHURTER 3101.0045 be used as a direct replacement for the Littelfuse 852/855?

A: Yes. Both holders accommodate 5mm x 20mm fuses, use identical through-hole vertical mounting with PC pin termination, and feature the same contact material and finish. The SCHURTER part's higher electrical ratings (16 A / 500V) do not create incompatibility.

Q: What is the significance of the higher current and voltage ratings on the substitute part?

A: The SCHURTER 3101.0045 is rated for 16 A at 500V compared to the original 12 A at 250V. These higher ratings indicate enhanced electrical capability and do not prevent use in circuits designed for the lower ratings. The mechanical interface remains identical.

Q: Does the RoHS compliance difference affect substitution?

A: The SCHURTER 3101.0045 is ROHS3 compliant while the Littelfuse 852/855 is non-compliant. For new designs or applications subject to environmental regulations, the SCHURTER part is the appropriate choice. Existing designs using the obsolete part may continue operation with either component.

Q: Are there any packaging considerations for this substitution?

A: The Littelfuse 852/855 is listed as obsolete with 977 pieces in stock. The SCHURTER 3101.0045 is active with 1105 pieces available in bulk packaging, ensuring reliable procurement for ongoing production.

Q: What fuse types are compatible with both holders?

A: Both the Littelfuse 852/855 and SCHURTER 3101.0045 are designed for 5mm x 20mm cartridge fuses. Fuse selection should be based on the specific circuit protection requirements of the application.