SCHURTER 0034.5628.11 Glass Cartridge Fuse 12.5A 250VAC 5x20mm Equivalent & Substitute Parts

Part Overview

The SCHURTER 0034.5628.11 is an active-status glass cartridge fuse rated at 12.5A, 250VAC with slow-blow response characteristics. The 5x20mm form factor requires a dedicated fuse holder for installation. This fuse is designed for circuit protection in AC/DC applications and is ROHS3 compliant with CQC and cURus approvals. Equivalent and substitute parts are identified when manufacturers discontinue production lines, when supply constraints occur, or when design flexibility permits cross-manufacturer sourcing while maintaining electrical and mechanical compatibility.

Substiute Parts

0034.5628.11

SCHURTER Inc.In Stock: 6850034.5628.11 Datasheet

Current PartRFQ

0034.3128

SCHURTER Inc.In Stock: 157930034.3128 Datasheet

Parametric EquivalentRFQ

5ST 12.5-R

Bel Fuse Inc.In Stock: 73645ST 12.5-R Datasheet

SimilarRFQ

BK/S506-12.5-R

Eaton - Electronics DivisionIn Stock: 1017BK/S506-12.5-R Datasheet

SimilarRFQ

BK1/S506-12.5-R

Eaton - Electronics DivisionIn Stock: 1769BK1/S506-12.5-R Datasheet

SimilarRFQ

021812.5MXP

Littelfuse Inc.In Stock: 5249021812.5MXP Datasheet

Parametric EquivalentRFQ

TSD-12.5A

OptiFuseIn Stock: 3163TSD-12.5A Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

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

• Current Rating: 12.5 A (exact match required)
• Voltage Rating (AC): 250 V (exact match required)
• Package / Case: 5mm x 20mm (exact match required)
• Fuse Type: Cartridge, Glass (exact match required)
• Response Time: Slow Blow (exact match required)
• Mounting Type: Requires Holder (exact match required)
• Operating Temperature Range: -55°C ~ 125°C (minimum requirement)

All substitute parts listed below meet these core electrical and mechanical parameters. Variations in Breaking Capacity, Melting I²t, and approval agencies are noted but do not disqualify substitution when the primary parameters align.

Parameter Comparison

Engineering Selection Recommendations

All listed substitute parts maintain active product status and ROHS3 compliance. Selection among equivalents should be based on:

SCHURTER 0034.3128 — Same manufacturer as the primary part with expanded approval certifications (PSE/JET, VDE in addition to CQC, cURus). Identical electrical parameters and melting I²t rating. Recommended for applications requiring additional regional compliance documentation.

Eaton BK/S506-12.5-R and BK1/S506-12.5-R — Both variants maintain 125A breaking capacity with cULus and PSE/JET approvals. Higher melting I²t (1019.5 vs. 750) indicates slightly different thermal response. Suitable for applications where Eaton certification is required.

Littelfuse 021812.5MXP — Maintains full operating temperature range with PSE and UL approvals. Breaking capacity is reduced to 63A; this part is suitable only for applications where the lower breaking capacity does not conflict with circuit protection requirements.

Bel Fuse 5ST 12.5-R — Meets core electrical parameters with reduced melting I²t (490). No approval agency specified; use only when application-specific testing or internal validation has confirmed compatibility.

OptiFuse TSD-12.5A — IEC 60127 compliant with the highest melting I²t (1045). Breaking capacity is 35A; this part is suitable only for applications where the lower breaking capacity does not conflict with circuit protection requirements.

Frequently Asked Questions (FAQ)

Q: Can I use any of these substitute parts interchangeably with the SCHURTER 0034.5628.11?

A: All listed parts share the same current rating (12.5A), voltage rating (250VAC), response time (slow blow), and 5x20mm package. They are mechanically and electrically compatible for installation in the same fuse holder. However, differences in breaking capacity and melting I²t may affect circuit protection behavior in fault conditions. Verify that the substitute part's breaking capacity and thermal characteristics are acceptable for your specific application.

Q: What is the difference between melting I²t values across these parts?

A: Melting I²t is a measure of the thermal energy required to melt the fuse element. The SCHURTER 0034.5628.11 has a melting I²t of 750. Substitutes range from 490 (Bel Fuse) to 1045 (OptiFuse). A lower I²t value means the fuse will open faster under overload; a higher value means it tolerates longer overload duration before opening. Select a substitute with I²t characteristics appropriate to your circuit's inrush current and overload tolerance.

Q: Why do some parts have lower breaking capacity ratings?

A: Breaking capacity is the maximum fault current the fuse can safely interrupt without rupturing or creating a hazard. The primary part and most substitutes are rated at 125A. Littelfuse 021812.5MXP (63A) and OptiFuse TSD-12.5A (35A) have lower ratings. These parts are suitable only for circuits where the maximum available fault current does not exceed their breaking capacity rating.

Q: Which substitute should I choose if my application requires specific regional certifications?

A: SCHURTER 0034.3128 carries CQC, cURus, PSE/JET, and VDE approvals. Eaton parts (BK/S506-12.5-R, BK1/S506-12.5-R) carry cULus and PSE/JET. Littelfuse 021812.5MXP carries PSE and UL. OptiFuse TSD-12.5A carries IEC 60127. Select based on the certifications required by your end-use market or application standard.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All parts listed, including the primary SCHURTER 0034.5628.11, are ROHS3 compliant.

Q: What is the difference between SCHURTER 0034.5628.11 and 0034.3128?

A: Both are SCHURTER products with identical electrical ratings, current, voltage, response time, and melting I²t. The 0034.3128 carries additional approval certifications (PSE/JET, VDE). Both are active-status products suitable for direct substitution.