Equivalent & Substitute Parts for 06641.25HXSL

Part Overview

The 06641.25HXSL is a 1.25A 250VAC board mount radial fuse manufactured by Littelfuse Inc. as part of the LT-5™ 664 series. This component is classified as obsolete, necessitating identification of active equivalent parts for ongoing design and procurement requirements. Substitute parts must maintain identical electrical ratings and mechanical compatibility while meeting current manufacturing and compliance standards.

Substiute Parts

06641.25HXSL

Littelfuse Inc.In Stock: 78006641.25HXSL Datasheet

Current PartRFQ

38211250410

Littelfuse Inc.In Stock: 198438211250410 Datasheet

DirectRFQ

38211250000

LittelfuseIn Stock: 2011638211250000 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 06641.25HXSL is determined by strict equivalence across the following parameters:

• Current Rating: 1.25 A (exact match required)
• Voltage Rating (AC): 250 V (exact match required)
• Response Time: Slow Blow (exact match required)
• Mounting Type: Through Hole (exact match required)
• Fuse Type: Board Mount, Radial, Can, Vertical (exact match required)
• Breaking Capacity @ Rated Voltage: 100A (exact match required)
• Operating Temperature Range: -40°C ~ 85°C (exact match required)

Two active substitute parts meet these criteria and are manufactured by Littelfuse Inc.:

1. 38211250000 (TR5® 382 series, Cut Tape packaging) - Manufacturer recommended substitute
2. 38211250410 (TR5® 382 series, Bulk packaging) - Direct equivalent

Both parts are active products with full compliance certifications and represent direct functional replacements for the obsolete 06641.25HXSL.

Parameter Comparison

Engineering Selection Recommendations

Both 38211250000 and 38211250410 are qualified substitutes for the obsolete 06641.25HXSL based on electrical and mechanical parameter equivalence.

38211250000 (Manufacturer Recommended): This part is designated as the manufacturer-recommended substitute and carries the highest inventory availability (20,100 units). It is supplied in Cut Tape packaging, suitable for automated assembly processes. Compliance certifications include CCC, cURus, KC, PSE/JET, SEMKO, and VDE standards.

38211250410 (Direct Equivalent): This part provides identical electrical and mechanical functionality and is available in Bulk packaging. It carries 1,901 units in inventory and maintains the same compliance certifications as the recommended substitute.

Both parts are active products with ROHS3 compliance and REACH unaffected status. Selection between these two substitutes should be based on packaging requirements and procurement volume needs. The height dimension differs slightly (0.315" vs. 0.333"), which may require PCB layout verification in space-constrained applications.

Frequently Asked Questions (FAQ)

Q: Can 38211250000 and 38211250410 be used interchangeably with 06641.25HXSL?

A: Both parts meet all critical electrical and mechanical parameters required for substitution: 1.25A current rating, 250V AC voltage rating, slow blow response time, 100A breaking capacity, and identical mounting configuration. The primary difference is packaging format (Cut Tape vs. Bulk) and a minor height variation (0.315" vs. 0.333"). PCB layout compatibility should be confirmed for the height difference.

Q: What is the difference between the two substitute parts?

A: 38211250000 and 38211250410 are electrically and mechanically identical. The differences are: packaging type (Cut Tape vs. Bulk), inventory availability, and series designation within the TR5® 382 family. Both are active products manufactured by Littelfuse.

Q: Why is the DC Cold Resistance different between the main part and substitutes?

A: The main part (06641.25HXSL) has a DC Cold Resistance of 0.085 Ohms, while both substitutes measure 0.05 Ohms. This parameter variation does not affect functional equivalence for board mount fuse applications, as the critical performance parameters (current rating, voltage rating, response time, and breaking capacity) remain identical.

Q: Are there compliance differences between the substitute parts and the original?

A: The original part carries certifications from CCC, CSA, KTL, METI, SEMKO, UL, and VDE. The substitute parts carry CCC, cURus, KC, PSE/JET, SEMKO, and VDE certifications. Both substitutes maintain ROHS3 compliance and are suitable for applications requiring international regulatory approval.

Q: Which substitute should be selected for new designs?

A: For new designs, either substitute is acceptable based on electrical and mechanical equivalence. Selection should be based on packaging requirements: 38211250000 (Cut Tape) for automated assembly processes, or 38211250410 (Bulk) for manual assembly or lower-volume applications. Confirm PCB layout compatibility with the 0.315" height dimension.