Equivalent & Substitute Parts for 066201.6HXSL

Part Overview

The Littelfuse 066201.6HXSL is a 1.6 A 250 V AC/DC board mount fuse with fast blow response time, designed for through-hole radial mounting in a vertical can configuration. This part is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and procurement continuity. Substitute parts must maintain identical electrical ratings, mechanical compatibility, and approval certifications to ensure direct interchangeability in existing circuit designs.

Substiute Parts

066201.6HXSL

Littelfuse Inc.In Stock: 981066201.6HXSL Datasheet

Current PartRFQ

37011600410

Littelfuse Inc.In Stock: 794237011600410 Datasheet

DirectRFQ

0034.6016

SCHURTER Inc.In Stock: 13170034.6016 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 066201.6HXSL is determined by strict equivalence across the following parameters:

• Current Rating: 1.6 A (exact match required)
• Voltage Rating: 250 V AC (exact match required)
• Response Time: Fast Blow (exact match required)
• Mounting Type: Through Hole (exact match required)
• Package / Case: Radial, Can, Vertical (exact match required)
• Breaking Capacity: 35 A (exact match required)
• RoHS Compliance: ROHS3 Compliant (exact match required)

Two substitute parts meet these criteria: the Littelfuse 37011600410 (TR5® 370 series, active status) and the SCHURTER 0034.6016 (MSF 250 series, active status). Both maintain full electrical and mechanical compatibility with the original part specification.

Parameter Comparison

Engineering Selection Recommendations

Both substitute parts are classified as active products with current manufacturing support, providing superior long-term availability compared to the obsolete 066201.6HXSL.

The Littelfuse 37011600410 (TR5® 370 series) maintains Littelfuse brand continuity and shares SEMKO certification with the original part. This option is recommended for designs requiring minimal supplier transition.

The SCHURTER 0034.6016 (MSF 250 series) offers an alternative from an established fuse manufacturer with equivalent electrical performance and regulatory approvals. This option is suitable for applications where multi-source qualification is required.

Both parts satisfy identical electrical specifications, mechanical fit requirements, and RoHS compliance mandates. Selection between them should be based on existing supplier relationships, procurement lead times, and design qualification protocols.

Frequently Asked Questions (FAQ)

Q: Can the 37011600410 and 0034.6016 be used interchangeably with the 066201.6HXSL?

A: Yes. Both substitute parts maintain identical current rating (1.6 A), voltage rating (250 V AC), response time (fast blow), mounting type (through hole), package configuration (radial, can, vertical), and breaking capacity (35 A). All three parts are ROHS3 compliant and meet the same regulatory approval standards.

Q: What is the difference in melting I²t between the substitute parts?

A: The Littelfuse 37011600410 has a melting I²t of 0.53, while the SCHURTER 0034.6016 has a melting I²t of 0.94, matching the original 066201.6HXSL. The melting I²t value indicates the thermal energy required to melt the fuse element. Both values are within the fast blow response category and do not affect interchangeability for standard circuit protection applications.

Q: Are there dimensional differences between the substitute parts?

A: Minor height variations exist. The 066201.6HXSL measures 0.333" H, the 37011600410 measures 0.315" H, and the 0034.6016 measures 0.335" H. All three maintain the same 0.335" diameter and radial can configuration. These variations are within standard mechanical tolerances for through-hole board mount fuses and do not affect PCB footprint compatibility.

Q: Which substitute part has better long-term availability?

A: Both substitute parts are classified as active products with current manufacturing status. The Littelfuse 37011600410 offers continuity within the Littelfuse product family, while the SCHURTER 0034.6016 provides multi-source qualification. Procurement decisions should be based on current inventory levels and supplier lead times.

Q: Do the substitute parts carry the same regulatory certifications?

A: Both substitute parts are ROHS3 compliant and carry VDE certification. The Littelfuse 37011600410 includes SEMKO certification, matching the original part. The SCHURTER 0034.6016 includes CCC and cURus certifications. All three parts meet international regulatory requirements for board mount fuses.