Littelfuse 0662.250HXLL Equivalent & Substitute Parts

Part Overview

The Littelfuse 0662.250HXLL is a 250 mA, 250 V AC/DC board mount fuse in radial, can, vertical package configuration. This component belongs to the LT-5™ 662 series and is classified as obsolete. Due to its obsolete status, identifying functionally equivalent active alternatives is essential for ongoing design support, production continuity, and component sourcing.

Substiute Parts

0662.250HXLL

Littelfuse Inc.In Stock: 8580662.250HXLL Datasheet

Current PartRFQ

37002500000

LittelfuseIn Stock: 328937002500000 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 0662.250HXLL is determined by strict equivalence across the following parameters:

• Current Rating: 250 mA (exact match required)
• Voltage Rating (AC): 250 V (exact match required)
• Fuse Type: Board Mount (Cartridge Style Excluded)
• Package / Case: Radial, Can, Vertical
• Response Time: Fast Blow
• Mounting Type: Through Hole
• RoHS Compliance: ROHS3 Compliant

The Littelfuse 37002500000 (TR5® 370 series) meets all these criteria and is classified as an active product with manufacturer recommended status. Physical dimensions show minor variation (0.315" H vs. 0.333" H), which remains within acceptable tolerance for through-hole board mount applications using standard PCB footprints.

Parameter Comparison

Engineering Selection Recommendations

The Littelfuse 37002500000 is the manufacturer recommended substitute for the obsolete 0662.250HXLL. Both components share identical electrical ratings (250 mA, 250 V AC/DC) and mechanical form factors (radial, can, vertical through-hole package). The substitute part is currently in active production status with 3200 units in stock, ensuring supply chain continuity.

The 37002500000 offers improved breaking capacity (50A vs. 35A) and maintains all required regulatory certifications including ROHS3 compliance. Operating temperature specification (-40°C ~ 85°C) is provided for the substitute, enabling thermal design verification. The minor height reduction (0.315" vs. 0.333") is compatible with standard through-hole PCB layouts and does not affect electrical performance or mechanical fit.

Frequently Asked Questions (FAQ)

Q: Can the 37002500000 be used as a direct replacement for the 0662.250HXLL?

A: Yes. Both parts share identical current rating (250 mA), voltage rating (250 V AC), response time (fast blow), and package configuration (radial, can, vertical through-hole). The substitute is manufacturer recommended and maintains ROHS3 compliance.

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

A: The 37002500000 is 0.018" (0.45mm) shorter than the 0662.250HXLL. This dimension change does not affect electrical performance or compatibility with standard through-hole PCB footprints designed for radial can fuses.

Q: Are the regulatory certifications equivalent?

A: Both parts carry SEMKO and VDE certifications. The main part includes CSA and UL approvals, while the substitute includes CCC and cURus approvals. All certifications meet international standards for board mount fuses at the specified voltage and current ratings.

Q: Why is the breaking capacity higher on the substitute part?

A: The 37002500000 (TR5® 370 series) has a breaking capacity of 50A compared to 35A on the 0662.250HXLL (LT-5™ 662 series). This represents an improvement in the substitute design and does not affect compatibility or performance in applications rated for 250 mA operation.

Q: Is the substitute part currently available?

A: Yes. The 37002500000 is classified as active product status with 3200 units in stock, providing reliable supply availability compared to the obsolete 0662.250HXLL.