SCHURTER 0034.4257 Equivalent & Substitute Parts

Part Overview

The SCHURTER 0034.4257 is a 4A 125VAC/VDC board mount radial fuse designed for through-hole applications. This fast-blow fuse is part of the MSF 125 series and is currently in active production status. Finding equivalent substitute parts may be necessary due to inventory constraints, supply chain considerations, or specific procurement requirements while maintaining identical electrical and mechanical performance.

Substiute Parts

0034.4257

SCHURTER Inc.In Stock: 9840034.4257 Datasheet

Current PartRFQ

0034.4227

SCHURTER Inc.In Stock: 17870034.4227 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SCHURTER 0034.4257 is determined by strict equivalence across the following critical parameters:

• Current Rating: 4 A (exact match required)
• Voltage Rating: 125 V AC and 125 V DC (exact match required)
• Fuse Type: Board Mount, Cartridge Style Excluded (exact match required)
• Mounting Type: Through Hole (exact match required)
• Package / Case: Radial, Can (exact match required)
• Response Time: Fast Blow (exact match required)
• Breaking Capacity: 100A (exact match required)
• Melting I²t: 1.9 (exact match required)
• Physical Dimensions: 0.252" Dia x 0.346" H / 6.40mm x 8.80mm (exact match required)
• Operating Temperature Range: -25°C ~ 85°C (exact match required)
• Compliance: cURus approval, ROHS3 Compliant (exact match required)

Only parts meeting all these criteria are considered true parametric equivalents and direct substitutes.

Parameter Comparison

Engineering Selection Recommendations

The SCHURTER 0034.4227 is a direct parametric equivalent to the 0034.4257. Both parts are manufactured by SCHURTER Inc., belong to the MSF 125 series, and maintain identical electrical specifications, mechanical dimensions, and regulatory compliance status. Both parts carry active product status and cURus approval with ROHS3 compliance.

Selection between these two parts may be based on inventory availability, lead time, or procurement source considerations, as they are functionally and mechanically interchangeable in all applications where the 0034.4257 is specified.

Frequently Asked Questions (FAQ)

Q: Can the 0034.4227 be used as a direct replacement for the 0034.4257?

A: Yes. The 0034.4227 is a direct parametric equivalent with identical current rating (4A), voltage ratings (125V AC/DC), fuse type, mounting configuration, package dimensions, response time, breaking capacity, and thermal operating range. Both parts are from the same manufacturer and series.

Q: Are there any differences in physical dimensions between these parts?

A: No. Both parts share identical dimensions of 0.252" diameter by 0.346" height (6.40mm x 8.80mm) and use the same radial, can-style package for through-hole board mounting.

Q: Do both parts meet the same regulatory and compliance standards?

A: Yes. Both the 0034.4257 and 0034.4227 carry cURus approval, are ROHS3 compliant, and maintain identical operating temperature ranges of -25°C to 85°C.

Q: What is the primary reason to consider substitution between these parts?

A: Substitution is typically driven by supply chain factors such as inventory availability or procurement lead times, as both parts are functionally and mechanically identical.

Q: Are there any electrical performance differences between these parts?

A: No. Both parts have identical melting I²t values of 1.9, breaking capacity of 100A at rated voltage, and fast-blow response characteristics.