SCHURTER 0034.4288 Board Mount Fuse - Equivalent & Substitute Parts

Part Overview

The SCHURTER 0034.4288 is a 5A 125VAC/VDC board mount fuse with radial, can-style packaging designed for through-hole mounting applications. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and component procurement. The fuse features fast-blow response characteristics and is rated for 300A breaking capacity at rated voltage, suitable for general circuit protection in industrial and commercial equipment.

Substiute Parts

0034.4288

SCHURTER Inc.In Stock: 9630034.4288 Datasheet

Current PartRFQ

0034.4228

SCHURTER Inc.In Stock: 58200034.4228 Datasheet

Parametric EquivalentRFQ

0034.4258

SCHURTER Inc.In Stock: 7370034.4258 Datasheet

Parametric EquivalentRFQ

0273005.H

Littelfuse Inc.In Stock: 11830273005.H Datasheet

DirectRFQ

30315000421

Littelfuse Inc.In Stock: 122730315000421 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SCHURTER 0034.4288 are classified into three categories based on electrical and mechanical parameter alignment:

Parametric Equivalents (SCHURTER 0034.4228 and 0034.4258): These parts maintain identical electrical specifications (5A, 125VAC/VDC, fast-blow response) and mechanical form factor (radial, can-style, through-hole mounting). Both are active products from the same manufacturer and series (MSF 125). The primary distinction is packaging format (bulk) and breaking capacity (100A versus 300A for the main part). These represent direct functional replacements.

Direct Manufacturer Equivalent (Littelfuse 0273005.H): This part matches all critical electrical parameters (5A, 125VAC/VDC, fast-blow) and mechanical mounting characteristics (through-hole, radial, can-style). It belongs to the MICRO™ 273 series and offers superior breaking capacity (10kA) and lower melting I²t (2.21 versus 3.04). Physical dimensions are nearly identical (0.250" Dia x 0.350" H). This part is actively produced and carries broader approval certifications (CSA, QPL, UL).

Similar Part (Littelfuse 30315000421): This part shares the 5A current rating and 125VAC voltage specification but differs in DC voltage rating (63V versus 125V) and physical dimensions (0.236" Dia x 0.315" H). It belongs to the TR3® 303 series with lower breaking capacity (50A) and melting I²t (1.5). This part is suitable only when DC voltage requirements do not exceed 63V.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Preferred): SCHURTER 0034.4228 or 0034.4258 are the primary substitutes. Both maintain identical electrical ratings and mechanical form factors as the obsolete 0034.4288. These parts are actively produced by SCHURTER and carry the same cURus approval certification. Selection between these two SCHURTER alternatives depends on packaging requirements (both available in bulk) and inventory availability.

For Enhanced Performance: Littelfuse 0273005.H provides superior electrical characteristics with 10kA breaking capacity (versus 300A) and broader certification coverage (CSA, QPL, UL). Physical dimensions are nearly identical, and the part operates across an extended temperature range (-55°C to 85°C). This option is suitable when higher breaking capacity and broader approvals are beneficial to system design.

For Constrained DC Voltage Applications: Littelfuse 30315000421 is applicable only when circuit design limits DC voltage to 63V or below. This part features reduced breaking capacity (50A) and lower melting I²t (1.5), making it unsuitable for applications requiring the full 125V DC rating of the main part.

Frequently Asked Questions (FAQ)

Q: Can SCHURTER 0034.4228 or 0034.4258 be used as direct replacements for the obsolete 0034.4288?

A: Yes. Both parts maintain identical electrical specifications (5A, 125VAC/VDC, fast-blow response) and mechanical mounting characteristics (through-hole, radial, can-style). The primary differences are breaking capacity (100A versus 300A) and packaging format. For applications where 100A breaking capacity is sufficient, these parts provide direct functional equivalence.

Q: What is the key difference between the Littelfuse 0273005.H and SCHURTER substitutes?

A: The Littelfuse 0273005.H offers significantly higher breaking capacity (10kA versus 100A or 300A) and carries broader approval certifications (CSA, QPL, UL versus cURus). Physical dimensions are nearly identical. This part is suitable when enhanced electrical performance and expanded regulatory approvals are required.

Q: Why is Littelfuse 30315000421 listed as a similar part rather than a direct equivalent?

A: The 30315000421 has a reduced DC voltage rating (63V versus 125V). This part is suitable only for applications where DC voltage does not exceed 63V. Additionally, it features lower breaking capacity (50A) and different physical dimensions (0.236" Dia x 0.315" H).

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts (SCHURTER 0034.4228, 0034.4258, and Littelfuse 0273005.H and 30315000421) are ROHS3 compliant and REACH unaffected, matching the environmental compliance status of the main part.

Q: What are the physical dimension tolerances for PCB layout compatibility?

A: The SCHURTER substitutes (0034.4228 and 0034.4258) maintain identical dimensions to the main part (0.252" Dia x 0.346" H). The Littelfuse 0273005.H has nearly identical dimensions (0.250" Dia x 0.350" H), representing a 0.002" diameter reduction and 0.004" height increase. The Littelfuse 30315000421 has notably different dimensions (0.236" Dia x 0.315" H) and requires PCB layout verification before substitution.