Littelfuse 37418000430 Board Mount Fuse - Equivalent & Substitute Parts

Part Overview

The Littelfuse 37418000430 is an 8A 250VAC board mount fuse with radial, can-style vertical packaging. This through-hole component is part of the TR5® 374 series and maintains active product status with cULus approval. Finding equivalent and substitute parts becomes necessary when managing inventory across multiple suppliers, accommodating regional availability constraints, or selecting alternatives with enhanced electrical characteristics such as higher breaking capacity or improved thermal performance.

Substiute Parts

37418000430

Littelfuse Inc.In Stock: 106037418000430 Datasheet

Current PartRFQ

37418000410

Littelfuse Inc.In Stock: 266637418000410 Datasheet

Parametric EquivalentRFQ

38218000430

Littelfuse Inc.In Stock: 138038218000430 Datasheet

Parametric EquivalentRFQ

0034.7124

SCHURTER Inc.In Stock: 20990034.7124 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Littelfuse 37418000430 is determined by strict alignment with the following core parameters: current rating of 8A, AC voltage rating of 250V, slow-blow response time, through-hole mounting configuration, and radial can-style vertical package format. All substitute parts must maintain these electrical and mechanical specifications to ensure direct compatibility without circuit redesign.

The substitute parts are grouped into two categories:

Parametric Equivalents (Littelfuse Series): Parts 37418000410 and 38218000430 share identical electrical ratings and package dimensions with the main part. These components differ in breaking capacity and melting I²t characteristics, which represent enhanced performance specifications rather than compatibility limitations.

Direct Manufacturer Equivalent (Cross-Manufacturer): Part 0034.7124 from SCHURTER Inc. meets all core electrical and mounting requirements. A minor dimensional variance exists in the height specification (0.335" H vs. 0.315" H), which remains within standard PCB footprint tolerances for radial through-hole components.

Parameter Comparison

Engineering Selection Recommendations

Littelfuse 37418000410: This part is a direct parametric equivalent with identical electrical ratings, breaking capacity, and melting I²t values. Selection is appropriate for applications requiring exact performance matching with the original specification. Both parts carry cULus approval and maintain active product status.

Littelfuse 38218000430: This substitute offers enhanced breaking capacity (100A vs. 50A) and higher melting I²t (233.6 vs. 150), providing superior fault protection characteristics. The TR5® 382 series carries expanded regulatory approval (cURus and PSE/JET certifications) in addition to cULus compliance. This part is suitable for applications where enhanced electrical performance is beneficial and circuit design permits the use of higher-rated components.

SCHURTER 0034.7124: This cross-manufacturer substitute maintains all core electrical specifications and through-hole radial mounting compatibility. The MSTU 250 series carries cULus approval and ROHS3 compliance. The height dimension (0.335" vs. 0.315") represents a 0.020" increase, which falls within standard PCB footprint tolerances for radial through-hole fuses. This part is suitable for applications where multi-source component qualification is required or where SCHURTER supply chain availability is preferred.

Frequently Asked Questions (FAQ)

Q: Can I substitute the Littelfuse 37418000430 with the 37418000410?

A: Yes. Both parts are parametric equivalents within the TR5® 374 series with identical current rating (8A), voltage rating (250V), response time (slow blow), mounting type (through hole), package format (radial can vertical), and physical dimensions. Both carry cULus approval and active product status.

Q: What is the difference between the 37418000430 and 38218000430?

A: The primary differences are breaking capacity (50A vs. 100A) and melting I²t (150 vs. 233.6). The 38218000430 belongs to the TR5® 382 series and provides enhanced fault protection. Both maintain 8A current rating, 250V AC voltage rating, and identical physical dimensions. The 38218000430 carries additional regulatory approvals (PSE/JET and cURus).

Q: Is the SCHURTER 0034.7124 compatible with the Littelfuse 37418000430?

A: Yes, with a minor dimensional consideration. The SCHURTER part maintains all core electrical specifications (8A, 250V AC, slow blow, through hole, radial can vertical package). The height dimension is 0.335" compared to 0.315" for the Littelfuse part, representing a 0.020" difference that remains within standard PCB footprint tolerances for radial through-hole components. Both carry cULus approval and ROHS3 compliance.

Q: Which substitute should I select for maximum fault protection?

A: The Littelfuse 38218000430 provides the highest breaking capacity (100A) and melting I²t (233.6) among all listed substitutes. This part is appropriate when enhanced electrical performance characteristics are beneficial to circuit design.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed parts, including the main part 37418000430 and all substitutes (37418000410, 38218000430, and 0034.7124), maintain ROHS3 compliance status.

Q: What is the operating temperature range for these fuses?

A: All parts in this comparison maintain an operating temperature range of -40°C to 85°C, ensuring consistent thermal performance across all substitute options.