Littelfuse 0664005.HXSL Board Mount Fuse - Equivalent & Substitute Parts

Part Overview

The Littelfuse 0664005.HXSL is a 5A 250VAC board mount fuse with slow blow response characteristics, designed for through-hole radial mounting in vertical orientation. This component is classified as obsolete, making identification of active equivalent parts essential for ongoing design support and procurement continuity. The part operates across a temperature range of -40°C to 85°C and meets multiple international safety certifications including UL, CSA, and KTL standards.

Substiute Parts

0664005.HXSL

Littelfuse Inc.In Stock: 7700664005.HXSL Datasheet

Current PartRFQ

38215000410

Littelfuse Inc.In Stock: 275938215000410 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The Littelfuse 38215000410 qualifies as a direct substitute for the 0664005.HXSL based on the following critical parameters:

• Current Rating: Both parts are rated at 5 A
• Voltage Rating (AC): Both parts are rated at 250 V
• Response Time: Both parts feature slow blow characteristics
• Mounting Type: Both are through-hole mounted components
• Package / Case: Both use radial, can, vertical configuration
• Breaking Capacity: Both rated at 100 A @ rated voltage
• Operating Temperature: Both operate across -40°C ~ 85°C
• RoHS Compliance: Both are ROHS3 compliant

The 38215000410 represents an active product from the TR5® 382 series, providing functional and electrical equivalence to the obsolete 0664005.HXSL from the LT-5™ 664 series.

Parameter Comparison

Engineering Selection Recommendations

The Littelfuse 38215000410 is the appropriate selection for applications currently using the obsolete 0664005.HXSL. Both components share identical electrical ratings (5A, 250VAC), response characteristics (slow blow), and mechanical mounting specifications (through-hole radial, vertical orientation).

The 38215000410 offers the advantage of active product status, ensuring long-term availability and supply chain continuity. Both parts maintain ROHS3 compliance and operate within the same temperature envelope (-40°C ~ 85°C). The substitute part carries expanded international certifications including CQC, cURus, KC, PSE/JET, SEMKO, and VDE, providing broader regulatory acceptance across global markets.

Physical dimensions are nearly identical, with the substitute measuring 0.315" H compared to 0.333" H for the original part—a 0.018" reduction in height that remains within typical PCB layout tolerances for radial through-hole components. DC cold resistance values are functionally equivalent (0.0108 Ohms vs. 0.011 Ohms), with negligible impact on circuit performance.

Frequently Asked Questions (FAQ)

Q: Can the Littelfuse 38215000410 be used as a direct replacement for the 0664005.HXSL in existing designs?

A: Yes. Both parts share identical current ratings (5A), voltage ratings (250VAC), response times (slow blow), mounting types (through-hole radial vertical), and breaking capacities (100A). The electrical and mechanical specifications are equivalent for board mount applications.

Q: What is the significance of the height difference between these two parts?

A: The 38215000410 measures 0.315" H compared to 0.333" H for the 0664005.HXSL—a 0.018" reduction. This minor dimensional variance is typical within radial fuse component families and does not affect PCB layout compatibility for standard through-hole mounting applications.

Q: Are there any compliance or certification differences between these parts?

A: Both parts are ROHS3 compliant. The 38215000410 carries additional international certifications (CQC, cURus, KC, PSE/JET, SEMKO, VDE) beyond the original part's certifications (CSA, KTL, UL), providing broader regulatory acceptance.

Q: Why is the original part classified as obsolete?

A: The 0664005.HXSL from the LT-5™ 664 series has been discontinued by Littelfuse. The 38215000410 from the active TR5® 382 series provides equivalent functionality and serves as the current production alternative.

Q: Are the melting I²t values significant for substitution?

A: The melting I²t values differ slightly (155 for the original vs. 121.25 for the substitute), reflecting minor thermal characteristics within the slow blow fuse classification. Both parts maintain the same 5A current rating and 100A breaking capacity, ensuring equivalent protection performance in circuit applications.

Q: What packaging options are available for the 38215000410?

A: The substitute part is available in bulk packaging, compared to the original part's standard packaging configuration. Verify packaging requirements with your procurement specifications.