Equivalent & Substitute Parts for 0664001.HXLL

Part Overview

The 0664001.HXLL is a 1 A, 250 V AC/DC board mount fuse manufactured by Littelfuse Inc. as part of the LT-5™ 664 series. This fuse features a radial, can-style vertical package for through-hole mounting applications. The product is currently obsolete, making identification of suitable substitute components essential for ongoing system support and component procurement.

Substiute Parts

0664001.HXLL

Littelfuse Inc.In Stock: 9560664001.HXLL Datasheet

Current PartRFQ

38211000000

Littelfuse Inc.In Stock: 2870838211000000 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 0664001.HXLL is determined by strict equivalence across the following electrical and mechanical parameters:

• Current Rating: 1 A (exact match required)
• Voltage Rating (AC): 250 V (exact match required)
• Response Time: Slow Blow (exact match required)
• Fuse Type: Board Mount, Through Hole (exact match required)
• Package / Case: Radial, Can, Vertical (exact match required)
• Breaking Capacity @ Rated Voltage: 100 A (exact match required)
• Operating Temperature Range: -40°C ~ 85°C (exact match required)

The substitute part 38211000000 meets all these criteria and is manufactured by the same supplier (Littelfuse Inc.), ensuring functional and mechanical compatibility. This part is currently in active production status with substantial inventory availability.

Parameter Comparison

Engineering Selection Recommendations

The 38211000000 is the direct functional equivalent for the obsolete 0664001.HXLL. Both components share identical electrical ratings (1 A, 250 V AC), response characteristics (Slow Blow), and mechanical mounting specifications (Through Hole, Radial Can, Vertical).

The substitute part carries active product status with full manufacturing support and inventory availability (28,679 units in stock). It maintains compliance with the same regulatory standards including CCC, SEMKO, and VDE certifications, with additional approvals (cURus, KC, PSE/JET) that extend its applicability across additional markets.

Physical dimensions differ slightly in height (0.315" versus 0.333"), which remains within typical PCB layout tolerances for through-hole radial components. The lower DC cold resistance (0.0625 Ohms versus 0.123 Ohms) and marginally higher melting I²t (4.85 versus 4.4) represent minor performance variations that do not affect functional equivalence for standard board mount fuse applications.

Frequently Asked Questions (FAQ)

Q: Can 38211000000 be used as a direct replacement for 0664001.HXLL in existing designs?

A: Yes. Both components are 1 A, 250 V AC/DC slow-blow board mount fuses with identical breaking capacity (100 A) and operating temperature range (-40°C ~ 85°C). The radial, can-style vertical package and through-hole mounting are identical, allowing direct PCB substitution.

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

A: The main part measures 0.333" H while the substitute measures 0.315" H. This 0.018" difference is negligible for standard through-hole PCB layouts and does not affect mechanical fit or electrical performance.

Q: Are there any compliance or certification differences?

A: Both parts are ROHS3 compliant and carry UL, VDE, and SEMKO certifications. The substitute part (38211000000) includes additional certifications (cURus, KC, PSE/JET) that expand its regulatory acceptance in additional regions.

Q: Why is the DC cold resistance lower in the substitute part?

A: The substitute part exhibits lower DC cold resistance (0.0625 Ohms versus 0.123 Ohms), which is a minor performance characteristic variation between the two fuse designs. This does not affect functional equivalence for standard applications.

Q: What packaging options are available for the substitute part?

A: The substitute part 38211000000 is available in Cut Tape (CT) packaging, suitable for automated assembly processes and component handling.