Littelfuse 37401000430 Equivalent & Substitute Parts

Part Overview

The Littelfuse 37401000430 is a 100 mA, 250 V AC/DC board mount fuse with slow blow response characteristics, designed for through hole radial mounting in vertical orientation. This TR5® 374 series fuse is actively produced and widely stocked (815 pcs available). Finding equivalent and substitute parts is necessary to ensure design flexibility, manage supply chain continuity, and accommodate different approval agency requirements across regional markets.

Substiute Parts

37401000430

Littelfuse Inc.In Stock: 92337401000430 Datasheet

Current PartRFQ

37401000410

Littelfuse Inc.In Stock: 468837401000410 Datasheet

DirectRFQ

37201000411

Littelfuse Inc.In Stock: 992337201000411 Datasheet

Parametric EquivalentRFQ

37201000431

Littelfuse Inc.In Stock: 77637201000431 Datasheet

Parametric EquivalentRFQ

0034.7105

SCHURTER Inc.In Stock: 20130034.7105 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Littelfuse 37401000430 is determined by strict alignment of the following critical parameters:

• Current Rating: 100 mA (exact match required)
• Voltage Rating (AC): 250 V (exact match required)
• Response Time: Slow Blow (exact match required)
• Mounting Type: Through Hole (exact match required)
• Package / Case: Radial, Can, Vertical (exact match required)
• Operating Temperature Range: -40°C ~ 85°C (exact match required)

Substitute parts are grouped into two categories:

Direct Manufacturer Equivalents (Littelfuse): Parts 37401000410 and 37201000431 share identical electrical and mechanical specifications with the main part, differing only in series designation and internal characteristics (breaking capacity, melting I²t, DC cold resistance) that do not affect functional substitution at the specified ratings.

Cross-Manufacturer Equivalent (SCHURTER): Part 0034.7105 meets all critical electrical and mechanical parameters but originates from a different manufacturer, with minor dimensional variation (0.335" H vs. 0.315" H) and different approval agency certifications.

Parameter Comparison

Engineering Selection Recommendations

Littelfuse 37401000410: This part is the primary direct equivalent to the 37401000430, with identical electrical and mechanical specifications and matching approval agencies (CSA, cULus). Higher inventory availability (4587 pcs) supports supply chain continuity. Selection is appropriate for applications requiring CSA and cULus compliance.

Littelfuse 37201000411 and 37201000431: These TR5® 372 series parts meet all critical electrical and mechanical parameters but carry different approval agencies (CCC, cURus, SEMKO, VDE). Breaking capacity is reduced to 35A compared to the main part's 50A. Selection is appropriate for applications requiring CCC, cURus, SEMKO, or VDE compliance where the lower breaking capacity is acceptable.

SCHURTER 0034.7105: This cross-manufacturer equivalent meets all critical electrical parameters and carries cULus approval. Height dimension is 0.335" (8.50mm) versus the main part's 0.315" (8.00mm), representing a 0.020" (0.50mm) increase. Selection is appropriate for applications where cross-manufacturer sourcing is acceptable and the dimensional variation does not conflict with PCB layout constraints.

Frequently Asked Questions (FAQ)

Q: Can I substitute 37401000410 for 37401000430 without design changes?

A: Yes. The 37401000410 is a direct manufacturer equivalent with identical current rating (100 mA), voltage rating (250 V), response time (slow blow), mounting type (through hole), package configuration (radial, can, vertical), dimensions (0.335" Dia x 0.315" H), and approval agencies (CSA, cULus).

Q: What is the difference between the TR5® 374 and TR5® 372 series?

A: Both series meet the specified 100 mA, 250 V slow blow requirements. The TR5® 372 series (37201000411, 37201000431) has a lower breaking capacity (35A vs. 50A) and different approval agencies (CCC, cURus, SEMKO, VDE vs. CSA, cULus). Selection depends on regional compliance requirements and application breaking capacity needs.

Q: Can I use the SCHURTER 0034.7105 if my PCB has tight vertical clearance?

A: The SCHURTER 0034.7105 is 0.020" (0.50mm) taller than the main part (0.335" H vs. 0.315" H). Verify PCB layout clearance before substitution. All other dimensions and electrical parameters are compatible.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts (37401000410, 37201000411, 37201000431, 0034.7105) are ROHS3 compliant, matching the main part's environmental compliance status.

Q: Which substitute part has the highest inventory availability?

A: Littelfuse 37201000411 has the highest inventory (9849 pcs), followed by 37401000410 (4587 pcs), SCHURTER 0034.7105 (1965 pcs), and 37201000431 (708 pcs).

Q: Do all substitute parts support the same operating temperature range?

A: Yes. All substitute parts operate across -40°C to 85°C, matching the main part's operating temperature range.