Littelfuse 0662004.HXSL Board Mount Fuse - Equivalent & Substitute Parts

Part Overview

The Littelfuse 0662004.HXSL is a 4A 250VAC board mount fuse with radial, can-style vertical packaging designed for through-hole applications. This component is classified as obsolete, making identification of active equivalent parts essential for ongoing design support and procurement continuity. The substitute part maintains identical electrical performance while offering improved availability and extended product lifecycle support.

Substiute Parts

0662004.HXSL

Littelfuse Inc.In Stock: 8160662004.HXSL Datasheet

Current PartRFQ

37014000410

Littelfuse Inc.In Stock: 3210737014000410 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The Littelfuse 37014000410 qualifies as a direct substitute based on the following matched electrical and mechanical parameters:

• Current Rating: 4 A (identical)
• Voltage Rating (AC): 250 V (identical)
• Response Time: Fast Blow (identical)
• Mounting Type: Through Hole (identical)
• Fuse Type: Board Mount (Cartridge Style Excluded) (identical)
• Package / Case: Radial, Can, Vertical (identical)
• Breaking Capacity @ Rated Voltage: 40 A (identical)

The substitute part belongs to the TR5® 370 series and maintains active product status with full manufacturing support. Physical dimensions are within acceptable tolerance for board mount applications (height variance: 0.333" vs 0.315").

Parameter Comparison

Engineering Selection Recommendations

The Littelfuse 37014000410 is the direct equivalent for the obsolete 0662004.HXSL. Selection of the substitute part is based on:

• Identical electrical specifications (4A, 250VAC, Fast Blow response)
• Identical mechanical form factor and mounting interface
• Active product status with full manufacturing support and extended availability
• Broader regulatory approval coverage (CCC, cURus, PSE, SEMKO, VDE certifications)
• ROHS3 compliance maintained across both parts

The substitute part is suitable for direct replacement in existing designs without circuit modification or board redesign.

Frequently Asked Questions (FAQ)

Q: Can the 37014000410 be used as a direct replacement for the 0662004.HXSL?

A: Yes. Both parts share identical current rating (4A), voltage rating (250VAC), response time (Fast Blow), mounting type (Through Hole), and package style (Radial, Can, Vertical). The substitute maintains the same breaking capacity (40A) and board mount interface.

Q: Are there dimensional differences between these parts?

A: The height dimension differs slightly: 0.333" (8.45mm) for the main part versus 0.315" (8.00mm) for the substitute. The diameter remains constant at 0.335" (8.50mm). This variance is within acceptable tolerance for through-hole board mount applications and does not affect electrical performance or mechanical fit.

Q: What is the difference in melting I²t values?

A: The main part specifies 7.9 while the substitute specifies 6.7. Both parts maintain identical fast-blow response characteristics and 40A breaking capacity at rated voltage. The I²t difference reflects manufacturing process variations within the same fuse class and does not affect substitution suitability.

Q: Does the substitute part have better regulatory coverage?

A: The substitute part (37014000410) carries additional regulatory approvals including CCC, PSE, and SEMKO certifications beyond the main part's CSA and UL approvals. Both maintain ROHS3 compliance. The expanded certification profile provides broader geographic and application support.

Q: What is the inventory status for each part?

A: The main part (0662004.HXSL) is obsolete with 801 pieces in stock. The substitute part (37014000410) is active with 32,066 pieces in stock, ensuring long-term procurement availability.