SCHURTER 0034.5233 Equivalent & Substitute Parts

Part Overview

The SCHURTER 0034.5233 is a 2.5 A 250 V AC DC glass cartridge fuse with slow-blow response characteristics, designed for 3AB and 3AG holder compatibility. This part operates across a temperature range of -55°C to 125°C and carries CSA and UL approvals. The product is classified as obsolete, making equivalent and substitute parts necessary for ongoing system maintenance and new designs requiring similar electrical protection specifications.

Substiute Parts

0034.5233

SCHURTER Inc.In Stock: 7830034.5233 Datasheet

Current PartRFQ

8020.5015

SCHURTER Inc.In Stock: 20618020.5015 Datasheet

SimilarRFQ

0034.3421

SCHURTER Inc.In Stock: 10550034.3421 Datasheet

Parametric EquivalentRFQ

031302.5HXP

Littelfuse Inc.In Stock: 1258031302.5HXP Datasheet

Parametric EquivalentRFQ

031302.5MXP

Littelfuse Inc.In Stock: 9261031302.5MXP Datasheet

Parametric EquivalentRFQ

031302.5VXP

Littelfuse Inc.In Stock: 944031302.5VXP Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the SCHURTER 0034.5233 is determined by the following critical parameters:

Primary Equivalence Criteria:

• Current Rating: 2.5 A (exact match required)
• Voltage Rating (AC): 250 V (exact match required)
• Fuse Type: Cartridge, Glass
• Response Time: Slow Blow
• Package / Case: 3AB, 3AG, 1/4" x 1-1/4"
• Size / Dimension: 0.250" Dia x 1.250" L (6.35mm x 31.75mm)
• Mounting Type: Requires Holder

Secondary Consideration:

• Breaking Capacity @ Rated Voltage: 100A or higher acceptable
• Operating Temperature Range: -55°C ~ 125°C or equivalent

Parametric equivalents maintain identical electrical and mechanical specifications. The SCHURTER 0034.3421 provides direct parametric equivalence from the same manufacturer. Littelfuse 313 series parts (031302.5HXP, 031302.5MXP, 031302.5VXP) offer full parametric compatibility with enhanced approval certifications and active product status.

The SCHURTER 8020.5015 represents a functional alternative with elevated voltage rating (500 V) and ceramic construction, suitable only where higher voltage tolerance is acceptable and holder compatibility is confirmed.

Parameter Comparison

Engineering Selection Recommendations

Preferred Substitutes (Parametric Equivalents):

The Littelfuse 313 series parts (031302.5HXP, 031302.5MXP, 031302.5VXP) are the primary recommended substitutes. These parts maintain identical electrical and mechanical specifications to the original 0034.5233 while offering active product status and expanded approval certifications (CE, CSA, K-MARK, PSE, UL). The 031302.5MXP variant offers the highest inventory availability (9244 units) among active equivalents.

Secondary Equivalent:

The SCHURTER 0034.3421 provides parametric equivalence from the original manufacturer but retains obsolete product status. This part is suitable only where existing inventory must be utilized or where manufacturer continuity is required.

Alternative Substitute (Functional Compatibility):

The SCHURTER 8020.5015 ceramic cartridge fuse operates at elevated voltage (500 V) with higher breaking capacity (1.5kA) and lower melting I²t (20). This part is suitable only in applications where the 250 V rating is not a limiting constraint and where holder compatibility with non-standard cartridge dimensions can be confirmed. The reduced operating temperature range (-40°C ~ 85°C) may restrict use in extreme cold environments.

Frequently Asked Questions (FAQ)

Q: Can I use the SCHURTER 8020.5015 as a direct replacement for the 0034.5233?

A: The 8020.5015 is not a direct replacement. While both are 2.5 A slow-blow fuses from SCHURTER, the 8020.5015 is a ceramic cartridge with 500 V rating and non-standard package dimensions. It requires confirmation of holder compatibility before use. The reduced operating temperature range (-40°C ~ 85°C) versus the original (-55°C ~ 125°C) may also be a limiting factor.

Q: What is the difference between the Littelfuse 031302.5HXP, 031302.5MXP, and 031302.5VXP?

A: All three Littelfuse parts are parametrically identical with matching current, voltage, response time, and physical dimensions. The primary differences are approval certifications and inventory levels. The 031302.5MXP has the highest inventory availability. Selection among these three should be based on specific regional certification requirements and supply chain considerations.

Q: Why is the 0034.3421 listed as a substitute if it is also obsolete?

A: The 0034.3421 is a parametric equivalent from the original manufacturer with identical electrical and mechanical specifications. It is listed for applications where existing inventory must be consumed or where manufacturer continuity is a requirement. For new designs, the active Littelfuse 313 series parts are preferred.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts (0034.3421, 031302.5HXP, 031302.5MXP, 031302.5VXP, and 8020.5015) are ROHS3 compliant and REACH unaffected, matching the compliance status of the original 0034.5233.

Q: What does "Breaking Capacity @ Rated Voltage" mean in the context of fuse selection?

A: Breaking capacity is the maximum fault current the fuse can safely interrupt at its rated voltage without rupturing or creating a hazard. The original 0034.5233 has a breaking capacity of 100A at 250V. Littelfuse equivalents maintain this 100A rating. The 8020.5015 has a higher breaking capacity (1.5kA) due to its ceramic construction and elevated voltage rating.

Q: Can I use these fuses in applications outside the specified operating temperature range?

A: No. The operating temperature range defines the conditions under which the fuse maintains its specified electrical characteristics. The original 0034.5233 and Littelfuse equivalents operate from -55°C to 125°C. The 8020.5015 operates from -40°C to 85°C. Use outside these ranges may result in unpredictable fuse behavior and inadequate circuit protection.