SCHURTER 0034.7311 Equivalent & Substitute Parts

Part Overview

The SCHURTER 0034.7311 is a 400 mA, 250 V AC/DC board mount fuse with slow blow response characteristics, designed for through hole radial mounting in vertical orientation. This component is classified as active product status with full cULus approval. Substitute parts are identified when equivalent electrical ratings, mechanical form factors, and safety certifications align with the original specification, enabling direct replacement in circuit board applications without design modification.

Substiute Parts

0034.7311

SCHURTER Inc.In Stock: 16740034.7311 Datasheet

Current PartRFQ

37404000000

Littelfuse Inc.In Stock: 306737404000000 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SCHURTER 0034.7311 is determined by strict equivalence across the following parameters:

• Current Rating: 400 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)
• RoHS Compliance: ROHS3 Compliant (exact match required)

The Littelfuse 37404000000 meets all substitution criteria. Both components share identical electrical ratings, response characteristics, mounting configuration, and environmental specifications. Dimensional variation (height: 8.50mm vs. 8.00mm) remains within acceptable mechanical tolerance for standard through hole board mount applications.

Parameter Comparison

Engineering Selection Recommendations

Both the SCHURTER 0034.7311 and Littelfuse 37404000000 are active product status components with full regulatory compliance. The Littelfuse 37404000000 carries dual certification (CSA and cULus) compared to cULus-only for the SCHURTER part, providing expanded geographic approval coverage. Both components meet ROHS3 compliance and REACH unaffected status requirements.

Selection between these parts should be based on supply chain availability, cost considerations, and existing qualification history within your organization. The dimensional height difference (0.5mm) is negligible for standard through hole board mount applications and does not impact electrical performance or mechanical fit in typical PCB designs.

Frequently Asked Questions (FAQ)

Q: Can the Littelfuse 37404000000 directly replace the SCHURTER 0034.7311 in existing designs?

A: Yes. Both components share identical electrical ratings (400 mA, 250 V AC), response time (Slow Blow), mounting configuration (Through Hole, Radial, Can, Vertical), and breaking capacity (50A). The 0.5mm height difference does not affect standard through hole board mount compatibility.

Q: What is the significance of the different Melting I²t values?

A: Melting I²t (0.528 for SCHURTER vs. 0.32 for Littelfuse) represents the thermal energy required to melt the fuse element. Both values are within the design envelope for 400 mA slow blow fuses and do not affect substitution eligibility for equivalent circuit protection applications.

Q: Are there any compliance differences between these parts?

A: The Littelfuse 37404000000 carries CSA certification in addition to cULus, whereas the SCHURTER 0034.7311 carries cULus only. Both meet ROHS3 compliance and REACH unaffected requirements. The additional CSA certification on the Littelfuse part expands approval coverage for certain markets.

Q: What packaging format is used for both parts?

A: Both components are supplied in Cut Tape (CT) packaging, suitable for automated assembly processes and standard component handling.

Q: Are there inventory considerations for these substitutes?

A: The SCHURTER 0034.7311 has 1586 pcs in stock, while the Littelfuse 37404000000 has 2999 pcs in stock. Availability may influence procurement decisions based on project timeline requirements.