Littelfuse 0663002.HXLL Board Mount Fuse - Equivalent & Substitute Parts

Part Overview

The Littelfuse 0663002.HXLL is a 2A 250VAC board mount fuse with radial, can-style vertical packaging designed for through-hole PCB applications. This component is classified as obsolete, making identification of active equivalent parts essential for ongoing production and maintenance requirements. The TR5® 382 series substitute provides functional equivalence with improved availability and active product status.

Substiute Parts

0663002.HXLL

Littelfuse Inc.In Stock: 8800663002.HXLL Datasheet

Current PartRFQ

38212000000

Littelfuse Inc.In Stock: 1480138212000000 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The Littelfuse 38212000000 (TR5® 382 series) qualifies as a direct substitute for the 0663002.HXLL based on the following critical parameters:

• Current Rating: Both parts rated at 2 A
• Voltage Rating (AC): Both rated at 250 V
• Fuse Type: Both are board mount fuses with cartridge style excluded
• Mounting Type: Both utilize through-hole mounting
• Package / Case: Both feature radial, can-style vertical packaging
• Response Time: Both classified as slow blow
• Operating Temperature: Both operate across -40°C ~ 85°C
• RoHS Compliance: Both ROHS3 compliant

The substitute part maintains electrical and mechanical compatibility while offering improved availability through active product status.

Parameter Comparison

Engineering Selection Recommendations

The Littelfuse 38212000000 is the appropriate selection for applications currently specified with the 0663002.HXLL. The substitute part maintains all critical electrical parameters (2A, 250VAC, slow blow response) and mechanical compatibility (through-hole radial can mounting). The minor dimensional variance (0.333" H vs. 0.315" H) and breaking capacity difference (35A vs. 100A) do not affect functional equivalence for standard board mount fuse applications.

The active product status of the TR5® 382 series ensures supply chain continuity and access to current manufacturing batches. Both parts carry equivalent regulatory approvals including UL, VDE, and CSA certifications, with the substitute offering expanded approval coverage (cURus, KC, PSE/JET).

Frequently Asked Questions (FAQ)

Q: Can the 38212000000 be used as a direct replacement for the 0663002.HXLL in existing designs?

A: Yes. Both parts share identical current rating (2A), voltage rating (250VAC), response time (slow blow), mounting type (through-hole), and package style (radial can vertical). The substitute maintains full electrical and mechanical compatibility.

Q: What is the significance of the different breaking capacities (35A vs. 100A)?

A: Breaking capacity indicates the maximum fault current the fuse can safely interrupt. The 38212000000 provides higher breaking capacity (100A), which does not compromise compatibility and may provide enhanced performance margin in applications with higher fault current potential.

Q: Are there dimensional differences that affect PCB layout?

A: The height dimension differs slightly (0.333" vs. 0.315"), representing an 8.45mm to 8.00mm reduction. The diameter remains constant at 0.335" (8.50mm). This minor height reduction typically does not require PCB layout modification for standard through-hole applications.

Q: Do both parts meet the same regulatory standards?

A: Both parts are ROHS3 compliant. The 0663002.HXLL carries approvals from CCC, CSA, KTL, METI, SEMKO, UL, and VDE. The 38212000000 carries approvals from CCC, cURus, KC, PSE/JET, SEMKO, and VDE, providing equivalent or expanded regulatory coverage depending on target markets.

Q: What is the difference in DC cold resistance between these parts?

A: The DC cold resistance differs marginally (0.027 Ohms vs. 0.028 Ohms), representing a negligible variance of approximately 3.7%. This difference does not affect circuit performance in standard fuse applications.