SCHURTER 0034.5237 Equivalent & Substitute Parts

Part Overview

The SCHURTER 0034.5237 is a 3.2 A, 250 V AC/DC slow-blow glass cartridge fuse in 3AB/3AG package format (1/4" x 1-1/4"). This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing system maintenance and new designs. The fuse requires a compatible holder for installation and is designed for circuit protection applications requiring slow-blow response characteristics.

Key Parameters

Parameter	Value
Manufacturer Part Number	0034.5237
Manufacturer	SCHURTER Inc.
Fuse Type	Cartridge, Glass
Current Rating	3.2 A
Voltage Rating (AC)	250 V
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)
Breaking Capacity @ Rated Voltage	100 A
Operating Temperature Range	-55°C ~ 125°C
Product Status	Obsolete
Approval Agencies	CSA, UL
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the SCHURTER 0034.5237 are grouped based on the following critical parameters that determine functional equivalence:

Primary Substitution Criteria:

Current Rating: 3.2 A (exact match required)
Voltage Rating (AC): 250 V (exact match required)
Fuse Type: Cartridge, Glass (exact match required)
Response Time: Slow Blow (exact match required)
Package / Case: 3AB, 3AG, 1/4" x 1-1/4" (exact match required)
Size / Dimension: 0.250" Dia x 1.250" L (exact match required)
Mounting Type: Requires Holder (exact match required)

Direct Equivalents (Parametric Equivalents): Parts 031303.2HXP, 031303.2MXCCP, 031303.2MXP, and 031303.2VXP from Littelfuse Inc. meet all primary substitution criteria and are classified as active products. These parts maintain identical electrical and mechanical specifications to the main part.

Similar Substitute (Voltage/Fuse Type Variation): Part 8020.5016 from SCHURTER Inc. is a ceramic cartridge fuse with a higher voltage rating (500 V AC) and slightly lower current rating (3.15 A). This part is suitable only when the application permits higher voltage tolerance and ceramic fuse construction.

Parameter Comparison

Parameter	0034.5237 (Main)	031303.2HXP	031303.2MXCCP	031303.2MXP	031303.2VXP	8020.5016
Manufacturer	SCHURTER Inc.	Littelfuse Inc.	Littelfuse Inc.	Littelfuse Inc.	Littelfuse Inc.	SCHURTER Inc.
Fuse Type	Cartridge, Glass	Cartridge, Glass	Cartridge, Glass	Cartridge, Glass	Cartridge, Glass	Cartridge, Ceramic
Current Rating (A)	3.2	3.2	3.2	3.2	3.2	3.15
Voltage Rating (AC)	250 V	250 V	250 V	250 V	250 V	500 V
Response Time	Slow Blow	Slow Blow	Slow Blow	Slow Blow	Slow Blow	Slow Blow
Package / Case	3AB, 3AG, 1/4" x 1-1/4"	3AB, 3AG, 1/4" x 1-1/4"	3AB, 3AG, 1/4" x 1-1/4"	3AB, 3AG, 1/4" x 1-1/4"	3AB, 3AG, 1/4" x 1-1/4"	Cartridge, Non-Standard
Size / Dimension	0.250" Dia x 1.250" L (6.35mm x 31.75mm)	0.250" Dia x 1.250" L (6.35mm x 31.75mm)	0.250" Dia x 1.250" L (6.35mm x 31.75mm)	0.250" Dia x 1.250" L (6.35mm x 31.75mm)	0.250" Dia x 1.250" L (6.35mm x 31.75mm)	0.250" Dia x 1.252" L (6.35mm x 31.80mm)
Breaking Capacity @ Rated Voltage	100 A	100 A	100 A	100 A	100 A	1.5 kA
Operating Temperature Range	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-40°C ~ 85°C
Product Status	Obsolete	Active	Active	Active	Active	Active
Approval Agencies	CSA, UL	CE, CSA, K-MARK, PSE, UL	CE, CSA, KC, PSE, UL	CE, CSA, K-MARK, PSE, UL	CE, CSA, KC, PSE, UL	cURus
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Preferred Substitutes (Direct Equivalents): Parts 031303.2HXP, 031303.2MXCCP, 031303.2MXP, and 031303.2VXP from Littelfuse Inc. are the recommended substitutes for the obsolete SCHURTER 0034.5237. These parts maintain identical electrical and mechanical specifications, ensuring drop-in compatibility. All four parts carry active product status and hold comprehensive international approvals (CE, CSA, UL, PSE, K-MARK or KC). The Littelfuse 313 series fuses provide extended temperature operating range (-55°C ~ 125°C) matching the original part and are ROHS3 compliant.

Alternative Substitute (Conditional Use): The SCHURTER 8020.5016 ceramic cartridge fuse is suitable only when the application circuit design permits a higher voltage rating (500 V AC) and can accommodate ceramic fuse construction. This part features a higher breaking capacity (1.5 kA) but operates within a narrower temperature range (-40°C ~ 85°C) and uses a non-standard package format. Use this substitute only when the original 250 V glass fuse specification is not a hard requirement.

Compliance Considerations: All substitute parts maintain ROHS3 compliance and REACH unaffected status, consistent with the original part. The Littelfuse equivalents provide broader regulatory approvals, including CE and PSE certifications in addition to CSA and UL, supporting global deployment scenarios.

Frequently Asked Questions (FAQ)

Q: Can I use 031303.2HXP, 031303.2MXCCP, 031303.2MXP, or 031303.2VXP interchangeably with the SCHURTER 0034.5237?

A: Yes. These four Littelfuse parts are parametric equivalents with identical current rating (3.2 A), voltage rating (250 V AC), fuse type (cartridge, glass), response time (slow blow), and package format (3AB, 3AG, 1/4" x 1-1/4"). All are active products with comprehensive regulatory approvals and are suitable for direct substitution.

Q: What is the difference between the four Littelfuse equivalents (031303.2HXP, 031303.2MXCCP, 031303.2MXP, 031303.2VXP)?

A: All four parts share identical electrical and mechanical specifications. Differences exist only in regulatory approval combinations and internal design variants. Selection among these four should be based on specific regional compliance requirements or internal design preferences. Consult the approval agency list for each part to confirm suitability for your target market.

Q: Can I use the SCHURTER 8020.5016 ceramic fuse as a substitute?

A: The 8020.5016 is a conditional substitute only. While it maintains the same current rating (3.15 A, slightly lower), response time (slow blow), and physical dimensions, it operates at 500 V AC (higher than the original 250 V) and uses ceramic construction instead of glass. Use this part only if your circuit design permits higher voltage tolerance and ceramic fuse operation. The narrower operating temperature range (-40°C ~ 85°C) may also be a limiting factor in extreme temperature environments.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. The SCHURTER 0034.5237 and all listed substitute parts (031303.2HXP, 031303.2MXCCP, 031303.2MXP, 031303.2VXP, and 8020.5016) are ROHS3 compliant and REACH unaffected, meeting environmental regulatory requirements.

Q: What holder types are compatible with these fuses?

A: All substitute parts require a compatible fuse holder, consistent with the original SCHURTER 0034.5237. The 3AB and 3AG package designations specify the holder type. Verify that your existing holder matches the 3AB or 3AG standard before installation. The SCHURTER 8020.5016 uses a non-standard cartridge package and may require a different holder; confirm holder compatibility before use.

Q: Which substitute part has the highest inventory availability?

A: The Littelfuse 031303.2MXP offers the highest inventory level at 2,215 pieces in stock, followed by 031303.2MXCCP (991 pieces), 031303.2VXP (978 pieces), and 031303.2HXP (967 pieces). The SCHURTER 8020.5016 ceramic alternative has 1,826 pieces available.

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