SCHURTER 2030.0252 Board Mount Fuse - Equivalent & Substitute Parts

Part Overview

The SCHURTER 2030.0252 is a board mount fuse rated at 1.25A, 125VAC/VDC with fast blow response time, designed for through-hole mounting in telecom applications. This part is classified as obsolete, making identification of active equivalent components essential for ongoing system support and new design implementations. The MSU 125 series fuse requires substitution with functionally equivalent active production parts that maintain identical electrical and mechanical specifications.

Substiute Parts

2030.0252

SCHURTER Inc.In Stock: 8292030.0252 Datasheet

Current PartRFQ

0034.4252

SCHURTER Inc.In Stock: 10140034.4252 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete SCHURTER 2030.0252 is based on strict equivalence of the following electrical and mechanical parameters:

• Current Rating: 1.25A (exact match required)
• Voltage Rating: 125VAC / 125VDC (exact match required)
• Response Time: Fast Blow (exact match required)
• Mounting Type: Through Hole (exact match required)
• Fuse Type: Board Mount (exact match required)
• Package / Case: Radial, Can (compatible form factor)
• Physical Dimensions: 0.252" Dia x 0.346" (6.40mm x 8.80mm) (exact match required)
• Breaking Capacity: 100A @ Rated Voltage (exact match required)
• Melting I²t: 0.12 (exact match required)
• Approval Agency: cURus certification (exact match required)
• RoHS Compliance: ROHS3 Compliant (exact match required)

The SCHURTER 0034.4252 meets all substitution criteria as an active production equivalent within the MSF 125 series.

Parameter Comparison

Engineering Selection Recommendations

The SCHURTER 0034.4252 is the direct active production equivalent for the obsolete 2030.0252. Selection is based on:

• Identical electrical specifications: 1.25A, 125VAC/125VDC, fast blow response
• Identical mechanical specifications: through-hole mounting, 0.252" Dia x 0.346" dimensions
• Identical performance characteristics: 100A breaking capacity, 0.12 melting I²t
• Identical environmental and compliance certifications: cURus approval, ROHS3 compliance, REACH unaffected status
• Active production status with confirmed inventory availability (992 pcs in stock)

The substitute part operates within the same operating temperature range (-25°C ~ 85°C) and maintains all required regulatory certifications for telecom applications. No functional or performance degradation occurs with this substitution.

Frequently Asked Questions (FAQ)

Q: Can the SCHURTER 0034.4252 be used as a direct replacement for the 2030.0252 in existing designs?

A: Yes. The 0034.4252 is electrically and mechanically equivalent. All critical parameters—current rating, voltage rating, response time, dimensions, breaking capacity, and melting I²t—are identical. Both parts carry cURus approval and ROHS3 compliance.

Q: What is the difference between the MSU 125 series (2030.0252) and the MSF 125 series (0034.4252)?

A: Both series are SCHURTER board mount fuses with identical electrical and mechanical specifications for this current and voltage rating. The MSF 125 series is the active production line; the MSU 125 series is obsolete. The substitution is based on functional equivalence, not series designation.

Q: Are there any package or form factor differences between these parts?

A: Both parts use radial, can-style through-hole mounting with identical physical dimensions (0.252" Dia x 6.40mm x 0.346" H / 8.80mm). The 0034.4252 specification excludes cartridge-style variants, but the radial can form factor is identical to the 2030.0252.

Q: Do both parts meet the same regulatory requirements?

A: Yes. Both the 2030.0252 and 0034.4252 carry cURus approval, are ROHS3 compliant, and are REACH unaffected. They are suitable for the same telecom applications and regulatory environments.

Q: What is the melting I²t value, and why is it important for substitution?

A: The melting I²t value of 0.12 is identical for both parts. This parameter defines the thermal energy required to melt the fuse element and is critical for circuit protection coordination. Identical I²t values ensure equivalent protection characteristics.