SCHURTER 0034.5129 Equivalent & Substitute Parts

Part Overview

The SCHURTER 0034.5129 is a 1.6 A, 250 V AC/DC fast-blow glass cartridge fuse in the 3AB/3AG package format (1/4" x 1-1/4"). This component is classified as obsolete and requires a compatible fuse holder for installation. Due to its obsolete status, equivalent substitute parts from active product lines are necessary to maintain system functionality and ensure continued availability for new designs and field replacements.

Substiute Parts

0034.5129

SCHURTER Inc.In Stock: 8190034.5129 Datasheet

Current PartRFQ

8020.5070

SCHURTER Inc.In Stock: 9688020.5070 Datasheet

SimilarRFQ

031201.6MXP

Littelfuse Inc.In Stock: 2037031201.6MXP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SCHURTER 0034.5129 is determined by the following critical parameters:

Primary Compatibility Criteria:

• Current Rating: 1.6 A (exact match required)
• Package / Case: 3AB, 3AG, 1/4" x 1-1/4" (physical and electrical compatibility)
• Mounting Type: Requires Holder (same holder compatibility)
• Response Time: Fast Blow (circuit protection characteristic)

Secondary Compatibility Criteria:

• Voltage Rating (AC): Minimum 250 V (equal or higher acceptable)
• Fuse Type: Cartridge format (glass or ceramic acceptable based on application requirements)
• Approval Agencies: CSA, UL, or equivalent recognized certifications

Two substitute parts meet these criteria:

1. SCHURTER 8020.5070 – Ceramic cartridge fuse with identical current rating and package, higher voltage rating (500 V), and active product status
2. Littelfuse 031201.6MXP – Glass cartridge fuse with identical current rating, voltage rating, and package, active product status with broader approval certifications

Parameter Comparison

Engineering Selection Recommendations

SCHURTER 8020.5070 Selection Criteria:

The SCHURTER 8020.5070 ceramic cartridge fuse is suitable for applications where the original 0034.5129 is no longer available and higher voltage margin is acceptable. This substitute maintains identical current rating and package compatibility while offering enhanced breaking capacity (1.5 kA versus 200 A). The ceramic construction provides superior thermal stability. Product status is active with cURus certification. The operating temperature range (-40°C ~ 85°C) is narrower than the original; applications requiring operation below -40°C or above 85°C require evaluation against specific system requirements.

Littelfuse 031201.6MXP Selection Criteria:

The Littelfuse 031201.6MXP glass cartridge fuse provides direct functional equivalence to the SCHURTER 0034.5129 with identical voltage and current ratings. This substitute maintains the same fuse type (glass) and operating temperature range (-55°C ~ 125°C). Product status is active with comprehensive approval certifications (CE, CSA, KC, PSE, UL). The breaking capacity is lower (100 A versus 200 A); applications requiring higher breaking capacity should use the SCHURTER 8020.5070 alternative. RoHS3 compliance and REACH unaffected status support regulatory requirements for new designs.

Selection Logic:

• For direct replacement with identical electrical characteristics and glass construction: Littelfuse 031201.6MXP
• For enhanced performance with higher breaking capacity and ceramic construction: SCHURTER 8020.5070
• Both substitutes are active products with recognized certifications and are physically compatible with 3AB/3AG fuse holders

Frequently Asked Questions (FAQ)

Q: Can the SCHURTER 8020.5070 be used in place of the SCHURTER 0034.5129?

A: Yes. Both fuses share identical current rating (1.6 A), package format (3AB, 3AG, 1/4" x 1-1/4"), and response time (fast blow). The 8020.5070 operates at 500 V AC, which is higher than the original 250 V rating, providing additional voltage margin. The ceramic construction offers different thermal characteristics. Verify that the application circuit can accommodate the higher voltage rating and that the operating temperature range (-40°C ~ 85°C) meets system requirements.

Q: Is the Littelfuse 031201.6MXP a direct equivalent to the SCHURTER 0034.5129?

A: Yes. The Littelfuse 031201.6MXP matches the SCHURTER 0034.5129 in current rating (1.6 A), voltage rating (250 V AC), fuse type (glass cartridge), response time (fast blow), and package format (3AB, 3AG, 1/4" x 1-1/4"). Operating temperature range is identical (-55°C ~ 125°C). Physical dimensions are equivalent within tolerance (31.75 mm versus 31.80 mm length). This substitute is suitable for direct replacement in existing designs.

Q: What is the difference between glass and ceramic cartridge fuses?

A: Glass and ceramic cartridge fuses differ in construction material and performance characteristics. Glass fuses (SCHURTER 0034.5129 and Littelfuse 031201.6MXP) provide visibility of the internal element and are suitable for general-purpose applications. Ceramic fuses (SCHURTER 8020.5070) offer higher breaking capacity and superior thermal stability, making them suitable for applications requiring enhanced protection. Both types are compatible with 3AB/3AG holders and provide fast-blow response.

Q: Are all three fuses compatible with the same fuse holder?

A: Yes. All three fuses (SCHURTER 0034.5129, SCHURTER 8020.5070, and Littelfuse 031201.6MXP) are designed for 3AB/3AG fuse holders with 1/4" x 1-1/4" package format. Physical dimensions are equivalent, ensuring mechanical compatibility. Electrical compatibility is confirmed by matching current rating (1.6 A) and response time (fast blow).

Q: What does "fast blow" mean in fuse specifications?

A: Fast blow indicates the fuse response time characteristic. A fast-blow fuse opens quickly when current exceeds its rated value, providing rapid circuit protection. This is suitable for circuits with low inrush current. All three fuses in this comparison are fast-blow types, maintaining identical protection characteristics.

Q: Why is the SCHURTER 0034.5129 listed as obsolete?

A: Product obsolescence indicates that the manufacturer has discontinued production and support for this part. Active substitutes (SCHURTER 8020.5070 and Littelfuse 031201.6MXP) are available from current product lines and are recommended for new designs and field replacements to ensure long-term availability and support.

Q: What is the significance of the breaking capacity difference between these fuses?

A: Breaking capacity specifies the maximum fault current the fuse can safely interrupt without damage. The SCHURTER 8020.5070 (1.5 kA) has higher breaking capacity than the SCHURTER 0034.5129 (200 A) and Littelfuse 031201.6MXP (100 A). For applications with high fault current potential, the 8020.5070 provides enhanced safety margin. For standard low-fault-current applications, all three fuses are adequate.

Q: Are these fuses RoHS compliant?

A: The Littelfuse 031201.6MXP and SCHURTER 8020.5070 are both ROHS3 compliant. The SCHURTER 0034.5129 RoHS status is not specified in available documentation. For new designs subject to RoHS requirements, the active substitutes are recommended.