SCHURTER 2030.0021 Board Mount Fuse - Equivalent & Substitute Parts

Part Overview

The SCHURTER 2030.0021 is a 1A 125VAC/125VDC board mount radial fuse 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 The MSU 125 series has been superseded by newer product lines while maintaining identical electrical and mechanical specifications.

Substiute Parts

2030.0021

SCHURTER Inc.In Stock: 8582030.0021 Datasheet

Current PartRFQ

0034.4221

SCHURTER Inc.In Stock: 21260034.4221 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete SCHURTER 2030.0021 is determined by strict equivalence across the following electrical and mechanical parameters:

• Current Rating: 1A (exact match required)
• Voltage Rating: 125 VAC / 125 VDC (exact match required)
• Response Time: Fast Blow (exact match required)
• Mounting Type: Through Hole (exact match required)
• Package Configuration: Radial, Can format (exact match required)
• 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: 0.07 (exact match required)
• Thermal Range: -25°C to 85°C (exact match required)
• Regulatory Compliance: cURus approval (exact match required)

The SCHURTER 0034.4221 meets all substitution criteria as an active product from the MSF 125 series with identical electrical performance and mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

The SCHURTER 0034.4221 is the direct active equivalent for the obsolete 2030.0021. Selection is based on:

• Identical electrical specifications (1A, 125VAC/VDC, Fast Blow response)
• Identical mechanical dimensions and through-hole mounting compatibility
• Identical breaking capacity and thermal performance
• Identical regulatory certifications (cURus approval, ROHS3 compliance, REACH unaffected status)
• Active product status with established supply chain availability (2101 pcs in stock vs. 764 pcs for obsolete part)

The transition from MSU 125 series to MSF 125 series represents a product line consolidation by SCHURTER Inc. with no functional or performance degradation.

Frequently Asked Questions (FAQ)

Q: Can the SCHURTER 0034.4221 be used as a direct replacement for the 2030.0021 in existing designs?

A: Yes. Both parts share identical current rating (1A), voltage rating (125VAC/125VDC), response time (Fast Blow), mounting type (Through Hole), physical dimensions (0.252" Dia x 0.346"), breaking capacity (100A), and thermal operating range (-25°C to 85°C). PCB footprints and circuit performance are equivalent.

Q: What is the difference between the MSU 125 and MSF 125 series?

A: The MSU 125 series (2030.0021) is obsolete. The MSF 125 series (0034.4221) is the active product line from SCHURTER Inc. with identical electrical and mechanical specifications. The series designation change reflects product line consolidation.

Q: Are there any packaging differences between these parts?

A: The 2030.0021 is specified as Radial, Can, Vertical. The 0034.4221 is specified as Radial, Can. Both use identical through-hole radial package configuration with matching physical dimensions. The packaging designation difference reflects documentation variation only.

Q: Do both parts meet the same regulatory requirements?

A: Yes. Both parts carry cURus approval, are ROHS3 compliant, REACH unaffected, and share identical ECCN (EAR99) and HTSUS (8536.10.0040) classifications.

Q: What is the melting I²t specification and why is it important?

A: Melting I²t of 0.07 defines the thermal energy required to melt the fuse element. Both parts share this specification, ensuring identical thermal response characteristics and protection performance in circuit applications.

Q: Is the 0034.4221 available in the same quantities as the 2030.0021?

A: The 0034.4221 has higher inventory availability (2101 pcs) compared to the obsolete 2030.0021 (764 pcs), providing better supply security for ongoing production and replacement requirements.