Littelfuse 37014000430 Board Mount Fuse - Equivalent & Substitute Parts

Part Overview

The Littelfuse 37014000430 is a 4 A, 250 V AC/DC board mount fuse in radial, can, vertical package configuration. This TR5® 370 series fuse is designed for through-hole mounting applications requiring fast-blow response characteristics. The part is currently active in production with 1,253 units in stock. Equivalent and substitute parts are identified when identical electrical ratings and mechanical compatibility are maintained across the allowed parameter set for board mount fuse applications.

Substiute Parts

37014000430

Littelfuse Inc.In Stock: 128237014000430 Datasheet

Current PartRFQ

37014000410

Littelfuse Inc.In Stock: 3210737014000410 Datasheet

DirectRFQ

37314000410

Littelfuse Inc.In Stock: 237537314000410 Datasheet

Parametric EquivalentRFQ

37314000430

Littelfuse Inc.In Stock: 109337314000430 Datasheet

Parametric EquivalentRFQ

0034.6020

SCHURTER Inc.In Stock: 17220034.6020 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by matching the following critical parameters: current rating (4 A), voltage rating (250 V AC), fuse type (board mount, through-hole), package configuration (radial, can, vertical), and response time (fast blow). All substitute parts must maintain identical electrical ratings and mechanical footprint compatibility. Dimensional tolerance and approval agency certifications are secondary considerations that do not prevent substitution when primary parameters align.

The substitute parts are grouped into two categories:

Direct Littelfuse Series Substitutes: Parts 37014000410 and 37314000430 share identical electrical and mechanical specifications with the main part, differing only in series designation or internal characteristics that do not affect board-level compatibility.

Cross-Manufacturer Equivalent: Part 0034.6020 (SCHURTER Inc., MSF 250 series) meets all critical electrical and mechanical parameters, enabling cross-manufacturer substitution.

Parameter Comparison

Engineering Selection Recommendations

Littelfuse 37014000410: This part is a direct substitute within the TR5® 370 series. It maintains identical electrical ratings, mechanical dimensions, and response characteristics. Higher inventory availability (32,066 units) supports supply chain continuity. Approval agencies include CCC, cURus, PSE, SEMKO, and VDE, matching the main part's certification profile.

Littelfuse 37314000410 and 37314000430: These TR5® 373 series parts provide parametric equivalence with increased breaking capacity (50A versus 40A) and lower melting I²t (4.6 versus 6.7). Both maintain identical electrical ratings and mechanical compatibility. Approval agencies differ (CSA, cULus), requiring verification against application-specific regulatory requirements. The 37314000430 variant is directly cross-referenced in the main part's substitute list.

SCHURTER 0034.6020: This cross-manufacturer equivalent from the MSF 250 series meets all critical electrical and mechanical parameters. Height dimension is 0.335" (8.50mm) versus 0.315" (8.00mm) for Littelfuse parts, representing a 0.020" (0.50mm) increase. This dimensional difference must be evaluated for PCB clearance and mechanical fit. Approval agency certification is limited to cURus. This part is directly cross-referenced in the main part's substitute list.

Frequently Asked Questions (FAQ)

Q: Can I substitute 37014000410 for 37014000430 without design changes?

A: Yes. Both parts are TR5® 370 series fuses with identical current rating (4 A), voltage rating (250 V AC), response time (fast blow), mounting type (through-hole), package configuration (radial, can, vertical), and physical dimensions (0.335" Dia x 0.315" H). Electrical and mechanical compatibility is maintained.

Q: What is the difference between TR5® 370 and TR5® 373 series fuses?

A: The TR5® 373 series (parts 37314000410 and 37314000430) provides higher breaking capacity (50A versus 40A) and lower melting I²t (4.6 versus 6.7) compared to the TR5® 370 series. Both series maintain identical current and voltage ratings. Approval agency certifications differ, requiring regulatory compliance verification for your application.

Q: Can I use the SCHURTER 0034.6020 as a direct replacement?

A: The SCHURTER 0034.6020 meets all critical electrical parameters (4 A, 250 V AC, fast blow, through-hole, radial can vertical package). However, the height dimension is 0.335" (8.50mm) compared to 0.315" (8.00mm) for Littelfuse parts, a 0.020" (0.50mm) difference. Verify PCB layout clearance and mechanical fit before substitution.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All parts listed—37014000410, 37314000410, 37314000430, and 0034.6020—are ROHS3 compliant and REACH unaffected.

Q: Which substitute part has the highest inventory availability?

A: Littelfuse 37014000410 has the highest inventory with 32,066 units in stock, compared to 1,253 units for the main part 37014000430.

Q: Do approval agency certifications affect substitution eligibility?

A: Approval agencies do not prevent substitution based on electrical and mechanical compatibility. However, your application may require specific certifications (CCC, cURus, PSE, SEMKO, VDE, CSA, cULus). Verify that the substitute part's certifications meet your regulatory requirements before implementation.