SCHURTER 0034.5144 Equivalent & Substitute Parts

Part Overview

The SCHURTER 0034.5144 is an 8A 250VAC fast-blow glass cartridge fuse in the 3AB/3AG form factor (1/4" x 1-1/4"). This component is classified as obsolete, requiring identification of active equivalent and substitute parts for ongoing procurement and system maintenance. Glass cartridge fuses in this rating are used in AC/DC circuits requiring fast-response overcurrent protection with 200A breaking capacity at rated voltage.

Substiute Parts

0034.5144

SCHURTER Inc.In Stock: 11350034.5144 Datasheet

Current PartRFQ

8020.5077

SCHURTER Inc.In Stock: 32878020.5077 Datasheet

SimilarRFQ

0312008.MXP

Littelfuse Inc.In Stock: 63130312008.MXP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the SCHURTER 0034.5144 is determined by the following critical parameters:

Direct Compatibility Requirements:

• Current Rating: 8 A (exact match required)
• Package / Case: 3AB, 3AG, 1/4" x 1-1/4" (mechanical and electrical holder compatibility)
• Mounting Type: Requires Holder (same holder interface)
• Response Time: Fast Blow (circuit protection characteristic)
• Size / Dimension: 0.250" Dia x 1.252" L (physical fit in holder)

Voltage Consideration:

• Voltage Rating (AC): 250 V minimum (substitutes rated at 250 V or higher are acceptable)

Approval Compliance:

• Substitutes must maintain equivalent or superior regulatory certifications

Two substitute parts meet these criteria with different voltage ratings and fuse material compositions. The selection between substitutes depends on the specific circuit voltage requirement and material preference (glass versus ceramic).

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Material and Voltage Match):

The Littelfuse 0312008.MXP is the primary equivalent for the SCHURTER 0034.5144. Both are glass cartridge fuses rated at 8A 250VAC with fast-blow response and identical mechanical form factors. The Littelfuse part is active in production with broader regulatory approvals (CE, CSA, KC, PSE, UL versus CSA, UL). Operating temperature range is identical (-55°C ~ 125°C). Breaking capacity matches at 200A. This part provides direct functional and mechanical compatibility.

For Higher Voltage Circuits (500VAC Requirement):

The SCHURTER 8020.5077 is a ceramic cartridge fuse rated at 8A 500VAC with fast-blow response. This part is suitable for circuits operating at voltages up to 500VAC where the original 250VAC rating is insufficient. The ceramic construction provides superior breaking capacity (1.5kA versus 200A). Mechanical compatibility is maintained through identical 3AB/3AG package dimensions. Operating temperature range is reduced (-40°C ~ 85°C). This part is active in production with cURus certification.

Compliance Consideration:

The Littelfuse 0312008.MXP offers the broadest regulatory coverage with CE, CSA, KC, PSE, and UL approvals, supporting global deployment requirements. The SCHURTER 8020.5077 carries cURus certification suitable for North American applications.

Frequently Asked Questions (FAQ)

Q: Can the SCHURTER 8020.5077 (500VAC ceramic) be used in a 250VAC circuit?

A: Yes. The 8020.5077 is rated for 500VAC, which exceeds the 250VAC circuit requirement. Fuses rated at higher voltages are electrically compatible with lower-voltage circuits. The ceramic construction and superior breaking capacity (1.5kA) provide enhanced protection characteristics. However, verify that the circuit holder and surrounding components are compatible with ceramic fuse construction if the original design specified glass fuses.

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

A: Glass and ceramic are fuse body materials. Glass fuses (0034.5144 and 0312008.MXP) provide visual indication of fuse status through the transparent body. Ceramic fuses (8020.5077) offer higher breaking capacity and are typically used in higher-fault-current applications. Both types function identically in 8A fast-blow circuits when rated for the same voltage and current.

Q: Are the physical dimensions identical between all three parts?

A: The SCHURTER 0034.5144 and 8020.5077 share identical dimensions (0.250" Dia x 1.252" L). The Littelfuse 0312008.MXP has a nominal length of 1.250" (31.75mm) versus 1.252" (31.80mm). This 0.002" difference is within standard mechanical tolerance for 3AB/3AG holders and does not affect compatibility.

Q: Which substitute part should be selected for new designs?

A: For new designs requiring 250VAC operation, the Littelfuse 0312008.MXP is recommended due to active production status, broader regulatory approvals (CE, CSA, KC, PSE, UL), and identical operating temperature range. For circuits requiring 500VAC protection, the SCHURTER 8020.5077 is the appropriate selection.

Q: Is the Littelfuse 0312008.MXP RoHS compliant?

A: Yes. The Littelfuse 0312008.MXP is ROHS3 compliant and REACH unaffected, meeting current environmental and hazardous substance regulations.

Q: What is the melting I²t specification and why does it differ between parts?

A: Melting I²t is a thermal energy rating indicating the fuse's response to overcurrent. The SCHURTER 0034.5144 has a melting I²t of 214, the Littelfuse 0312008.MXP is 166, and the SCHURTER 8020.5077 is 120. Lower values indicate faster response to overcurrent. These differences reflect material composition and construction. All three parts maintain fast-blow response characteristics appropriate for the 8A rating.