SCHURTER 0034.7109 Equivalent & Substitute Parts

Part Overview

The SCHURTER 0034.7109 is a 250 mA, 250 V AC/DC board mount fuse with slow blow response characteristics, designed for through hole radial mounting in vertical orientation. This fuse is part of the MSTU 250 series and carries active product status with cULus approval. Substitute parts are identified when equivalent electrical ratings, mechanical compatibility, and regulatory compliance can be maintained across alternative manufacturers.

Substiute Parts

0034.7109

SCHURTER Inc.In Stock: 8230034.7109 Datasheet

Current PartRFQ

37402500410

Littelfuse Inc.In Stock: 192837402500410 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SCHURTER 0034.7109 is determined by strict equivalence across the following parameters:

• Current Rating: 250 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)
• Breaking Capacity @ Rated Voltage: 50A (exact match required)
• Operating Temperature Range: -40°C ~ 85°C (exact match required)
• Regulatory Compliance: cULus or equivalent certification required

The Littelfuse 37402500410 (TR5® 374 series) meets all substitution criteria. Minor dimensional variation in height (0.315" vs 0.335") remains within acceptable mechanical tolerance for board mount applications and does not affect electrical performance or circuit board layout compatibility.

Parameter Comparison

Engineering Selection Recommendations

Both the SCHURTER 0034.7109 and Littelfuse 37402500410 are active products with equivalent electrical specifications and regulatory certifications. Selection between these parts should be based on:

• Availability and lead time requirements
• PCB layout constraints (height differential of 0.020" / 0.50mm)
• Supplier preference and procurement agreements
• Inventory management and cost considerations

Both parts satisfy cULus approval requirements and ROHS3 compliance mandates. The Littelfuse part carries additional CSA certification, providing expanded regulatory coverage for certain applications.

Frequently Asked Questions (FAQ)

Q: Can the Littelfuse 37402500410 directly replace the SCHURTER 0034.7109 in existing designs?

A: Yes. Both parts share identical electrical ratings (250 mA, 250 V AC/DC), response characteristics (Slow Blow), mounting configuration (Through Hole Radial), and breaking capacity (50A). The 0.020" height difference does not affect electrical performance or standard PCB footprint compatibility.

Q: Are there any regulatory compliance differences between these parts?

A: Both parts carry cULus approval. The Littelfuse part additionally holds CSA certification, which may be required for specific regional or application-specific standards.

Q: What is the significance of the Melting I²t values (0.258 vs 0.17)?

A: Melting I²t indicates the thermal energy required to melt the fuse element. Both values fall within the acceptable range for 250 mA slow blow fuses and do not affect substitution eligibility for equivalent circuit protection.

Q: Are dimensional tolerances critical for board mount fuse selection?

A: For through hole radial fuses, the diameter (0.335" / 8.50mm) is the primary constraint for PCB hole sizing. The height difference of 0.020" (0.50mm) is within standard mechanical tolerance and does not require PCB redesign.

Q: What certifications are required for these fuses in industrial applications?

A: Both parts carry cULus certification, which is the standard requirement for North American industrial and consumer electronics applications. The Littelfuse part's additional CSA certification may be required for specific Canadian or regional compliance mandates.