SCHURTER 0034.5145 Equivalent & Substitute Parts

Part Overview

The SCHURTER 0034.5145 is a 10 A, 250 V AC/DC fast-blow glass cartridge fuse with 3AB/3AG package configuration and 1/4" x 1-1/4" dimensions. This component is classified as obsolete product status. Identification of equivalent and substitute parts is necessary to maintain circuit protection functionality in applications where the original part is no longer available through standard distribution channels. Substitute parts must maintain electrical compatibility across current rating, voltage rating, response time, and physical dimensions while meeting applicable approval agency certifications.

Substiute Parts

0034.5145

SCHURTER Inc.In Stock: 9800034.5145 Datasheet

Current PartRFQ

8020.5078

SCHURTER Inc.In Stock: 62088020.5078 Datasheet

SimilarRFQ

0312010.MXP

Littelfuse Inc.In Stock: 168920312010.MXP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SCHURTER 0034.5145 are evaluated based on the following critical parameters that determine functional equivalence:

Primary Compatibility Criteria:

• Current Rating: 10 A (exact match required)
• Voltage Rating - AC: 250 V (minimum requirement)
• Response Time: Fast Blow (exact match required)
• Fuse Type: Cartridge, Glass (exact match required)
• Package / Case: 3AB, 3AG, 1/4" x 1-1/4" (exact match required)
• Physical Dimensions: 0.250" Dia x 1.252" L (exact match required)
• Mounting Type: Requires Holder (exact match required)

Secondary Compatibility Criteria:

• Breaking Capacity @ Rated Voltage: 200 A (minimum requirement)
• Approval Agency: CSA, UL certifications (preferred for regulatory compliance)
• Operating Temperature Range: -55°C ~ 125°C (preferred for environmental compatibility)

Two substitute parts meet the primary compatibility criteria for the SCHURTER 0034.5145:

1. Littelfuse 0312010.MXP - Direct functional equivalent with identical electrical and mechanical specifications. Active product status. Meets all primary criteria with enhanced approval agency coverage (CE, CSA, KC, PSE, UL).

2. SCHURTER 8020.5078 - Partial substitute with identical current rating, response time, physical dimensions, and mounting type. Differs in fuse material (ceramic vs. glass), voltage rating (500 V AC / 400 V DC vs. 250 V AC), and breaking capacity (1.5 kA vs. 200 A). Active product status. Suitable only for applications where higher voltage rating and breaking capacity are acceptable.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: Littelfuse 0312010.MXP

The Littelfuse 0312010.MXP is the recommended direct substitute for the SCHURTER 0034.5145. This part maintains identical electrical specifications (10 A, 250 V AC, fast-blow response), identical fuse type (cartridge, glass), and identical package configuration (3AB, 3AG, 1/4" x 1-1/4"). Physical dimensions are equivalent within manufacturing tolerance (0.250" Dia x 1.250" L vs. 1.252" L). The part holds active product status with expanded approval agency certifications (CE, CSA, KC, PSE, UL) compared to the original part (CSA, UL), providing enhanced regulatory compliance coverage. Operating temperature range (-55°C ~ 125°C) matches the original specification. RoHS3 compliance and REACH unaffected status provide environmental regulatory alignment. Melting I²t value of 298 differs from the original 372, indicating slightly faster thermal response characteristics within the fast-blow category.

Secondary Substitute: SCHURTER 8020.5078

The SCHURTER 8020.5078 is a partial substitute suitable only for applications where circuit design permits higher voltage and breaking capacity ratings. This ceramic cartridge fuse maintains the 10 A current rating, fast-blow response time, and identical physical dimensions (0.250" Dia x 1.252" L). However, the voltage rating (500 V AC / 400 V DC) exceeds the original specification (250 V AC), and the breaking capacity (1.5 kA) significantly exceeds the original (200 A). The ceramic construction differs from the glass construction of the original part. Operating temperature range (-40°C ~ 85°C) is narrower than the original (-55°C ~ 125°C). This substitute is applicable only in circuits designed to accommodate higher voltage and breaking capacity specifications.

Frequently Asked Questions (FAQ)

Q: Can the Littelfuse 0312010.MXP be used as a direct replacement for the SCHURTER 0034.5145?

A: Yes. The Littelfuse 0312010.MXP meets all primary compatibility criteria: identical 10 A current rating, 250 V AC voltage rating, fast-blow response time, cartridge glass fuse type, and 3AB/3AG package configuration with 1/4" x 1-1/4" dimensions. Physical dimensions are equivalent within manufacturing tolerance. The part is active product status with expanded regulatory certifications.

Q: What is the difference between the glass and ceramic fuse types in the substitute options?

A: The SCHURTER 0034.5145 and Littelfuse 0312010.MXP are glass cartridge fuses. The SCHURTER 8020.5078 is a ceramic cartridge fuse. Glass fuses are typically used in lower voltage applications (250 V AC), while ceramic fuses are designed for higher voltage applications (500 V AC / 400 V DC). The ceramic construction in the 8020.5078 provides higher breaking capacity (1.5 kA vs. 200 A) and different thermal response characteristics (melting I²t of 220 vs. 372).

Q: Can the SCHURTER 8020.5078 be used in place of the SCHURTER 0034.5145?

A: The SCHURTER 8020.5078 is a partial substitute only for applications where the circuit design permits higher voltage ratings (500 V AC / 400 V DC) and higher breaking capacity (1.5 kA). The part maintains the 10 A current rating, fast-blow response, and identical physical dimensions. However, the ceramic construction, higher voltage rating, and narrower operating temperature range (-40°C ~ 85°C vs. -55°C ~ 125°C) make this substitute suitable only for specific applications where these differences are acceptable.

Q: Are there any compliance or certification differences between the substitute parts?

A: Yes. The SCHURTER 0034.5145 holds CSA and UL certifications. The Littelfuse 0312010.MXP holds CE, CSA, KC, PSE, and UL certifications, providing broader regulatory coverage. The SCHURTER 8020.5078 holds cURus certification. For applications requiring specific regulatory compliance, the Littelfuse 0312010.MXP provides the most comprehensive certification coverage. Both substitute parts are RoHS3 compliant and REACH unaffected.

Q: What is the significance of the melting I²t value difference between the substitute parts?

A: The melting I²t value indicates the thermal energy required to melt the fuse element. The SCHURTER 0034.5145 has a melting I²t of 372, the Littelfuse 0312010.MXP has 298, and the SCHURTER 8020.5078 has 220. Lower I²t values indicate faster thermal response. All three parts are classified as fast-blow fuses. The Littelfuse 0312010.MXP exhibits slightly faster thermal response than the original part, while the SCHURTER 8020.5078 exhibits the fastest response. These differences are within the fast-blow fuse category and do not affect functional equivalence for standard circuit protection applications.

Q: What inventory availability exists for these substitute parts?

A: The SCHURTER 0034.5145 (obsolete) has 877 pieces in stock. The Littelfuse 0312010.MXP (active) has 16,866 pieces in stock. The SCHURTER 8020.5078 (active) has 6,165 pieces in stock. The active substitute parts provide significantly higher inventory availability for procurement.