Littelfuse 37000800430 Board Mount Fuse - Equivalent & Substitute Parts

Part Overview

The Littelfuse 37000800430 is an 80 mA, 250 V AC/DC board mount fuse with fast blow response characteristics. This through-hole radial, can-style fuse is designed for circuit protection in electronic equipment requiring reliable overcurrent protection at low current ratings. The part maintains active product status with full compliance to international safety standards including CCC, cURus, SEMKO, and VDE certifications. Equivalent and substitute parts are identified when identical electrical parameters and mechanical compatibility are maintained across the specified operating range.

Substiute Parts

37000800430

Littelfuse Inc.In Stock: 138737000800430 Datasheet

Current PartRFQ

37300800410

Littelfuse Inc.In Stock: 113437300800410 Datasheet

Parametric EquivalentRFQ

0034.6003

SCHURTER Inc.In Stock: 23020034.6003 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the Littelfuse 37000800430 are qualified based on the following critical parameters that determine functional interchangeability:

• Current Rating: 80 mA (exact match required)
• Voltage Rating (AC): 250 V (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)
• Operating Temperature Range: -40°C ~ 85°C (minimum requirement)
• Physical Dimensions: Compatible with 0.335" Dia x 0.315" H footprint

Two substitute parts meet these criteria: the Littelfuse 37300800410 (parametric equivalent from the same manufacturer) and the SCHURTER 0034.6003 (direct manufacturer alternative). Both maintain identical electrical specifications and mechanical compatibility with the original part.

Parameter Comparison

Engineering Selection Recommendations

All three parts maintain active product status and full RoHS3 compliance. Selection between the Littelfuse 37000800430 and its substitutes should be based on certification requirements and availability:

The Littelfuse 37300800410 provides direct parametric equivalence within the same manufacturer's product line, with certifications from CSA and cULus. This part is suitable for applications requiring Littelfuse-specific qualification or where series continuity is preferred.

The SCHURTER 0034.6003 offers cross-manufacturer compatibility with certifications from CCC, cURus, and VDE. This part is applicable in applications where multi-source qualification is acceptable and where SCHURTER components are already integrated into the supply chain. The breaking capacity of 35A versus 50A on the Littelfuse parts represents a design difference that must be evaluated against specific circuit protection requirements.

Frequently Asked Questions (FAQ)

Q: Can the Littelfuse 37300800410 be used as a direct replacement for the 37000800430?

A: Yes. Both parts share identical electrical specifications (80 mA, 250 V AC, fast blow response) and mechanical compatibility (through-hole radial, can-style package). The primary difference is the series designation (TR5® 370 versus TR5® 373) and certification bodies (CCC, cURus, SEMKO, VDE versus CSA, cULus).

Q: What are the dimensional differences between the Littelfuse and SCHURTER parts?

A: The Littelfuse 37000800430 and 37300800410 measure 0.335" Dia x 0.315" H (8.50mm x 8.00mm). The SCHURTER 0034.6003 measures 0.335" Dia x 0.335" H (8.50mm x 8.50mm). The height difference of 0.020" (0.50mm) must be evaluated for PCB layout compatibility.

Q: Are there differences in breaking capacity between these parts?

A: Yes. The Littelfuse parts (37000800430 and 37300800410) have a breaking capacity of 50A at rated voltage, while the SCHURTER 0034.6003 has a breaking capacity of 35A. Both values exceed the 80 mA rated current and are suitable for standard board-level protection applications.

Q: Which certifications apply to each part?

A: The Littelfuse 37000800430 carries CCC, cURus, SEMKO, and VDE certifications. The Littelfuse 37300800410 carries CSA and cULus certifications. The SCHURTER 0034.6003 carries CCC, cURus, and VDE certifications. Selection should align with regional regulatory requirements.

Q: Can these parts be used interchangeably in all applications?

A: Interchangeability is determined by electrical parameter matching (current, voltage, response time) and mechanical fit. All three parts meet these criteria. However, certification requirements, breaking capacity specifications, and physical dimensions must be evaluated against specific application requirements before substitution.