SCHURTER 0034.5245 Equivalent & Substitute Parts

Part Overview

The SCHURTER 0034.5245 is a 10A 125VAC slow-blow glass cartridge fuse in 3AB/3AG package format (1/4" x 1-1/4"). This component is classified as obsolete, making equivalent substitute parts necessary for ongoing system maintenance and new designs. The fuse is designed for applications requiring cartridge-style fuse holders and operates across a temperature range of -55°C to 125°C with CSA and UL approval.

Substiute Parts

0034.5245

SCHURTER Inc.In Stock: 8740034.5245 Datasheet

Current PartRFQ

8020.5021

SCHURTER Inc.In Stock: 36418020.5021 Datasheet

SimilarRFQ

0313010.MXP

Littelfuse Inc.In Stock: 17460313010.MXP Datasheet

DirectRFQ

0313010.MX250P

Littelfuse Inc.In Stock: 22260313010.MX250P Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the SCHURTER 0034.5245 is determined by the following critical parameters:

Primary Substitution Criteria:

• Current Rating: 10 A (exact match required)
• Fuse Type: Cartridge format with holder requirement
• Package / Case: 3AB, 3AG, 1/4" x 1-1/4" physical dimensions
• Response Time: Slow Blow characteristic
• Physical Dimensions: 0.250" Dia x 1.250" L (6.35mm x 31.75mm)

Secondary Compatibility Factors:

• Voltage Rating: Must meet or exceed 125 V AC application requirement
• Operating Temperature Range: Must support -55°C ~ 125°C or equivalent
• Approval Certifications: UL or cURus compliance for safety-critical applications
• RoHS Compliance: ROHS3 Compliant status maintained

The substitute parts listed below maintain identical current ratings, physical dimensions, and mounting requirements while offering different voltage ratings and material compositions (glass vs. ceramic) suitable for various circuit protection scenarios.

Parameter Comparison

Engineering Selection Recommendations

For 125V AC Applications (Direct Voltage Match): The Littelfuse 0313010.MX250P provides the closest electrical match with 250V AC rating, exceeding the 125V AC requirement while maintaining identical physical dimensions, 10A current rating, slow-blow response, and glass cartridge construction. This part is active in production with UL approval and ROHS3 compliance.

For Lower Voltage Applications (32V AC): The Littelfuse 0313010.MXP operates at 32V AC, suitable for lower-voltage circuit protection scenarios. It maintains identical physical form factor, 10A rating, and slow-blow characteristics with UL certification and ROHS3 compliance.

For Higher Voltage Applications (500V AC): The SCHURTER 8020.5021 provides 500V AC rating with ceramic construction, offering higher breaking capacity (1.5kA) compared to the glass cartridge design. Physical dimensions are nominally equivalent (0.250" Dia x 1.252" L). This part carries cURus certification and ROHS3 compliance but operates within a reduced temperature range (-40°C ~ 85°C).

Compliance Considerations: All substitute parts maintain ROHS3 compliance and are actively produced. Selection should prioritize UL-certified parts (0313010.MXP, 0313010.MX250P) for applications requiring CSA/UL approval equivalence. The ceramic alternative (8020.5021) with cURus certification is suitable where higher voltage ratings and breaking capacity are required.

Frequently Asked Questions (FAQ)

Q: Can the Littelfuse 0313010.MXP (32V AC) substitute for the SCHURTER 0034.5245 (125V AC)? A: The 0313010.MXP maintains identical physical dimensions, current rating, and slow-blow response. However, its 32V AC rating is below the 125V AC requirement. This part is suitable only for applications operating at 32V AC or lower.

Q: Is the SCHURTER 8020.5021 (ceramic, 500V AC) compatible with 125V AC circuits? A: Yes. The 8020.5021 is rated for 500V AC, which exceeds the 125V AC requirement. However, it uses ceramic construction instead of glass and has a non-standard package designation. Physical dimensions are nominally equivalent (0.250" Dia x 1.252" L vs. 0.250" Dia x 1.250" L). Operating temperature range is reduced to -40°C ~ 85°C.

Q: What is the difference between glass and ceramic cartridge fuses? A: Both types are provided in the substitute list. Glass cartridges (0034.5245, 0313010.MXP, 0313010.MX250P) and ceramic cartridges (8020.5021) differ in construction material. Ceramic fuses typically offer higher breaking capacity and voltage ratings. Selection depends on circuit voltage and fault current requirements.

Q: Do all substitute parts fit the same 3AB/3AG holder? A: The Littelfuse parts (0313010.MXP, 0313010.MX250P) are explicitly rated for 3AB, 3AG holders with identical dimensions. The SCHURTER 8020.5021 has a non-standard package designation and nominally equivalent dimensions (0.250" Dia x 1.252" L). Holder compatibility should be verified for the ceramic alternative.

Q: Which substitute part is recommended for direct replacement in existing designs? A: The Littelfuse 0313010.MX250P is recommended for direct replacement. It matches the 10A current rating, slow-blow response, glass cartridge type, and 3AB/3AG package format while providing 250V AC rating (exceeding the 125V AC requirement). It carries UL certification and ROHS3 compliance.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts (0313010.MXP, 0313010.MX250P, 8020.5021) are ROHS3 compliant, matching the compliance status of the main part.

Q: What is the operating temperature range consideration for the SCHURTER 8020.5021? A: The 8020.5021 operates within -40°C ~ 85°C, which is narrower than the main part's -55°C ~ 125°C range. Applications requiring operation below -40°C or above 85°C should use the Littelfuse alternatives.