Littelfuse 37000500430 Board Mount Fuse - Equivalent & Substitute Parts

Part Overview

The Littelfuse 37000500430 is a 50 mA, 250 V AC/DC board mount fuse with fast blow response characteristics. This through-hole radial component is designed for circuit protection in electronic applications requiring compact, reliable overcurrent protection. The part maintains active product status with full regulatory compliance across multiple certification bodies. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity.

Substiute Parts

37000500430

Littelfuse Inc.In Stock: 96737000500430 Datasheet

Current PartRFQ

37000500410

Littelfuse Inc.In Stock: 272537000500410 Datasheet

DirectRFQ

37300500410

Littelfuse Inc.In Stock: 212937300500410 Datasheet

Parametric EquivalentRFQ

0034.6001

SCHURTER Inc.In Stock: 9910034.6001 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Littelfuse 37000500430 is determined by strict equivalence across the following critical parameters:

• Current Rating: 50 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 Style: Radial, Can, Vertical (exact match required)
• Operating Temperature Range: -40°C to 85°C (exact match required)
• Regulatory Compliance: Active product status with recognized certifications

Three substitute parts meet these criteria:

1. 37000500410 (Littelfuse Inc., TR5® 370 Series) - Direct manufacturer equivalent with identical electrical and mechanical specifications
2. 37300500410 (Littelfuse Inc., TR5® 373 Series) - Parametric equivalent with identical core electrical ratings and package dimensions
3. 0034.6001 (SCHURTER Inc., MSF 250 Series) - Cross-manufacturer equivalent meeting all critical electrical and mechanical parameters

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: 37000500410 (Littelfuse Inc.)

The 37000500410 is the direct manufacturer equivalent within the TR5® 370 series. All electrical parameters, mechanical dimensions, and regulatory certifications are identical to the main part. This substitute provides the highest level of compatibility and interchangeability.

Secondary Substitute: 37300500410 (Littelfuse Inc.)

The 37300500410 is a parametric equivalent from the TR5® 373 series. Core electrical ratings and package dimensions match the main part exactly. Regulatory certifications differ (CSA, cULus versus CCC, cURus, SEMKO, VDE), requiring verification against application-specific compliance requirements. The melting I²t value (0.0001) differs from the main part (0.00035), which may affect thermal response characteristics in specific circuit designs.

Cross-Manufacturer Substitute: 0034.6001 (SCHURTER Inc.)

The 0034.6001 from SCHURTER's MSF 250 series meets all critical electrical and mechanical parameters. Physical height differs slightly (8.50 mm versus 8.00 mm), and breaking capacity is reduced to 35 A compared to 50 A. Regulatory certifications (CCC, cURus, VDE) align with the main part. This substitute is suitable for applications where the reduced breaking capacity and minor dimensional variance are acceptable.

Frequently Asked Questions (FAQ)

Q: Can 37000500410 be used as a direct replacement for 37000500430?

A: Yes. The 37000500410 is a direct manufacturer equivalent with identical current rating, voltage rating, response time, mounting type, package style, and operating temperature range. All regulatory certifications and physical dimensions match exactly.

Q: What is the difference between 37300500410 and 37000500430?

A: Both parts share identical electrical ratings (50 mA, 250 V AC, fast blow) and package dimensions. The 37300500410 belongs to the TR5® 373 series rather than TR5® 370, and has different regulatory certifications (CSA, cULus versus CCC, cURus, SEMKO, VDE). The melting I²t value differs (0.0001 versus 0.00035), affecting thermal response. Application-specific compliance requirements must be verified before selection.

Q: Is the SCHURTER 0034.6001 fully compatible with 37000500430?

A: The 0034.6001 meets all critical electrical parameters and mounting requirements. However, two differences exist: the breaking capacity is 35 A instead of 50 A, and the physical height is 8.50 mm instead of 8.00 mm. These differences must be evaluated against specific application requirements and available board space.

Q: What parameters must match exactly for substitution?

A: Current rating (50 mA), voltage rating (250 V AC), response time (fast blow), mounting type (through hole), package style (radial, can, vertical), and operating temperature range (-40°C to 85°C) must all match exactly. Breaking capacity and melting I²t values should be evaluated based on circuit protection requirements.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts (37000500410, 37300500410, and 0034.6001) are ROHS3 compliant, matching the main part's environmental compliance status.