SCHURTER 0034.4243 Board Mount Fuse — Equivalent & Substitute Parts

Part Overview

The SCHURTER 0034.4243 is a 250 mA, 125 V AC/DC board mount fuse with fast-blow response characteristics, designed for through-hole radial mounting in radial can package configuration. This component is active in production and widely used in power distribution and circuit protection applications. Equivalent and substitute parts are identified when design requirements necessitate alternative sourcing, inventory optimization, or performance parameter adjustments within the allowed electrical and mechanical specifications for this fuse category.

Substiute Parts

0034.4243

SCHURTER Inc.In Stock: 11150034.4243 Datasheet

Current PartRFQ

0034.4213

SCHURTER Inc.In Stock: 17870034.4213 Datasheet

Parametric EquivalentRFQ

0272.250H

Littelfuse Inc.In Stock: 9910272.250H Datasheet

SimilarRFQ

0279.250V

Littelfuse Inc.In Stock: 8840279.250V Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for board mount fuses in this category is determined by strict equivalence in the following parameters:

• Current Rating: 250 mA (exact match required)
• Voltage Rating (AC/DC): 125 V (exact match required)
• Response Time: Fast Blow (exact match required)
• Mounting Type: Through Hole (exact match required)
• Fuse Type: Board Mount (Cartridge Style Excluded) (exact match required)
• Package / Case: Radial, Can configuration (exact match required)

All identified substitute parts meet these core electrical and mechanical criteria. Variations in breaking capacity, operating temperature range, physical dimensions, and approval agencies are secondary parameters that may influence selection based on application-specific requirements but do not disqualify substitution eligibility.

Parameter Comparison

Engineering Selection Recommendations

SCHURTER 0034.4213 is a parametric equivalent to SCHURTER 0034.4243. Both parts share identical electrical ratings, response characteristics, and physical dimensions. Selection between these two SCHURTER variants is based on inventory availability and supply chain considerations. Both carry cURus approval and ROHS3 compliance.

Littelfuse 0272.250H and Littelfuse 0279.250V are functionally equivalent alternatives with enhanced breaking capacity (10 kA versus 100 A) and broader approval certifications (CSA, QPL, UL). The Littelfuse 0272.250H supports an extended operating temperature range (-55°C ~ 125°C), while the 0279.250V operates within -55°C ~ 85°C. Physical dimensions vary slightly across all parts; PCB layout verification is necessary to confirm mechanical fit. All substitute parts maintain ROHS3 compliance and REACH unaffected status.

Selection should prioritize parts with active product status and certifications matching application requirements. Littelfuse options provide higher breaking capacity suitable for circuits requiring enhanced fault protection.

Frequently Asked Questions (FAQ)

Q: Can SCHURTER 0034.4213 directly replace SCHURTER 0034.4243?

A: Yes. Both parts are parametrically identical in current rating (250 mA), voltage rating (125 V AC/DC), response time (fast blow), mounting type (through hole), and package configuration (radial can). Physical dimensions and electrical characteristics are equivalent.

Q: Are Littelfuse 0272.250H and 0279.250V compatible with designs specified for SCHURTER 0034.4243?

A: Electrical compatibility is confirmed across all four parts: 250 mA current rating, 125 V AC/DC voltage rating, fast-blow response, and through-hole radial can mounting. Mechanical compatibility requires verification of PCB footprint and lead spacing, as physical dimensions vary. Littelfuse parts feature enhanced breaking capacity (10 kA) and broader temperature operating ranges, making them suitable for applications with higher fault current requirements.

Q: What is the significance of breaking capacity differences between SCHURTER (100 A) and Littelfuse (10 kA) parts?

A: Breaking capacity defines the maximum fault current a fuse can safely interrupt without rupturing or creating hazardous conditions. Littelfuse parts with 10 kA breaking capacity are rated for higher-energy fault scenarios. Selection depends on circuit fault current analysis; applications with lower fault current levels may use either specification.

Q: Do all substitute parts meet the same compliance standards?

A: SCHURTER parts carry cURus approval; Littelfuse parts carry CSA, QPL, and UL approvals. All four parts are ROHS3 compliant and REACH unaffected. Application-specific certification requirements should determine final part selection.

Q: How do operating temperature ranges affect substitution decisions?

A: SCHURTER parts operate within -25°C ~ 85°C. Littelfuse 0272.250H extends to -55°C ~ 125°C, and Littelfuse 0279.250V to -55°C ~ 85°C. Selection should match the thermal environment of the target application. Extended temperature ranges provide design margin for extreme operating conditions.