SCHURTER 0034.5233.PT Equivalent & Substitute Parts

Part Overview

The SCHURTER 0034.5233.PT is a 2.5 A, 250 V AC/DC slow-blow glass cartridge fuse in the FST 6.3x32 series, designed for applications requiring holder-based mounting in 3AB and 3AG configurations. This part is classified as obsolete, necessitating identification of active equivalent and substitute components that maintain functional compatibility while meeting current availability and compliance requirements.

Substiute Parts

0034.5233.PT

SCHURTER Inc.In Stock: 9100034.5233.PT Datasheet

Current PartRFQ

8020.5015

SCHURTER Inc.In Stock: 20618020.5015 Datasheet

SimilarRFQ

031502.5MXP

Littelfuse Inc.In Stock: 939031502.5MXP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SCHURTER 0034.5233.PT is determined by the following critical parameters:

Primary Substitution Criteria:

• Current Rating: 2.5 A (exact match required)
• Voltage Rating (AC): 250 V minimum (equal or higher acceptable)
• Response Time: Slow Blow (exact match required)
• Fuse Type: Cartridge, Glass (preferred for direct compatibility)
• Package / Case: 3AB, 3AG, 1/4" x 1-1/4" (exact match required for holder compatibility)
• Mounting Type: Requires Holder (exact match required)
• Operating Temperature Range: -55°C ~ 125°C (minimum acceptable)

Acceptable Variation Parameters:

• Breaking Capacity: May vary within application tolerance
• Melting I²t: May vary within application tolerance
• Approval Agencies: Must include CSA and/or UL certification
• Manufacturer: Alternative manufacturers acceptable if all primary criteria met

Two substitute parts meet these criteria with differing trade-offs in voltage rating and material composition.

Parameter Comparison

Engineering Selection Recommendations

031502.5MXP (Littelfuse Inc.) - Preferred Direct Substitute

The Littelfuse 031502.5MXP is the optimal substitute for the SCHURTER 0034.5233.PT. Both components share identical current rating (2.5 A), voltage rating (250 V AC), fuse type (cartridge glass), response time (slow blow), and operating temperature range (-55°C ~ 125°C). The 031502.5MXP maintains the same 3AB and 3AG package designation and holder-based mounting requirement. Physical dimensions are within acceptable tolerance (0.275" Dia x 1.275" L versus 0.250" Dia x 1.252" L). The part is active in production, ROHS3 compliant, and certified by CSA and UL, meeting all regulatory requirements of the original component. Melting I²t value (130) is comparable to the original (123).

8020.5015 (SCHURTER Inc.) - Alternative with Voltage Upgrade

The SCHURTER 8020.5015 provides a voltage-rated upgrade (500 V AC versus 250 V AC) while maintaining the 2.5 A current rating and slow-blow response time. This ceramic cartridge fuse is suitable for applications where higher voltage margin is beneficial. However, the non-standard package designation and reduced operating temperature range (-40°C ~ 85°C versus -55°C ~ 125°C) require verification of holder compatibility and thermal environment suitability. The significantly higher breaking capacity (1.5 kA versus 100 A) and lower melting I²t (20 versus 123) indicate different thermal and electrical characteristics that must be evaluated against specific application requirements. This substitute is active and cURus certified.

Selection Basis:

• 031502.5MXP is recommended for direct replacement in applications requiring identical electrical and thermal specifications with active product status and comprehensive certification.
• 8020.5015 is suitable for applications where elevated voltage rating and higher breaking capacity provide system-level benefits, contingent upon holder compatibility verification and thermal environment confirmation.

Frequently Asked Questions (FAQ)

Q: Can the 031502.5MXP directly replace the 0034.5233.PT without modification?

A: The 031502.5MXP is electrically and functionally equivalent to the 0034.5233.PT. Both are 2.5 A, 250 V AC slow-blow glass cartridge fuses with 3AB and 3AG package designation. Physical dimensions are within acceptable tolerance for standard holder applications. No circuit modification is required.

Q: What is the difference between the glass fuse (031502.5MXP) and ceramic fuse (8020.5015) substitutes?

A: The 031502.5MXP is a glass cartridge fuse matching the original component type, while the 8020.5015 is a ceramic cartridge fuse. The ceramic variant offers higher voltage rating (500 V versus 250 V) and breaking capacity (1.5 kA versus 100 A), but exhibits different thermal characteristics (melting I²t of 20 versus 123). Material composition affects response behavior and holder compatibility.

Q: Is the 8020.5015 compatible with the same holder as the 0034.5233.PT?

A: The 8020.5015 is designated as "Cartridge, Non-Standard" package, whereas the original part specifies 3AB and 3AG package. Holder compatibility cannot be confirmed based on package designation alone. Physical verification against the specific holder model is required before substitution.

Q: Why does the 031502.5MXP have slightly larger dimensions than the original part?

A: The 031502.5MXP measures 0.275" Dia x 1.275" L compared to the original 0.250" Dia x 1.252" L. These dimensional variations are within acceptable tolerance for standard 3AB and 3AG holder applications. Holder compatibility is maintained through the standardized package designation rather than exact dimensional matching.

Q: What certifications should I verify when substituting this fuse?

A: The original part carries CSA and UL certification. The 031502.5MXP is certified by CE, CSA, K-MARK, PSE, and UL, providing equivalent or enhanced regulatory coverage. The 8020.5015 carries cURus certification. Verify that the selected substitute meets the specific regulatory requirements of your application and target market.

Q: Can the 031502.5MXP be used in applications rated for -55°C to 125°C operation?

A: Yes. The 031502.5MXP is rated for -55°C ~ 125°C operation, matching the original component's temperature range. The 8020.5015, however, is rated only to -40°C ~ 85°C and is not suitable for applications requiring the full -55°C to 125°C range.

Q: What does "slow blow" response time mean for these fuses?

A: Slow-blow fuses are designed to tolerate temporary inrush currents without nuisance operation while providing protection against sustained overcurrent conditions. All three components (original and both substitutes) employ slow-blow characteristics, ensuring consistent protection behavior in the application circuit.

Q: Are both substitute parts currently available?

A: Yes. The 031502.5MXP (Littelfuse) and 8020.5015 (SCHURTER) are both classified as active products. The original 0034.5233.PT is obsolete. Current inventory availability should be confirmed with the component supplier for project scheduling.