SCHURTER 0034.5238 Equivalent & Substitute Parts

Part Overview

The SCHURTER 0034.5238 is a 4 A, 250 V AC/DC slow-blow glass fuse cartridge 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 part requires a compatible fuse holder for installation and is approved by CSA and UL standards.

Key Parameters

Parameter	Value
Manufacturer Part Number	0034.5238
Manufacturer	SCHURTER Inc.
Current Rating	4 A
Voltage Rating (AC)	250 V
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)
Breaking Capacity @ Rated Voltage	200 A
Operating Temperature Range	-55°C ~ 125°C
Product Status	Obsolete
Approval Agency	CSA, UL
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the SCHURTER 0034.5238 are grouped based on strict electrical and mechanical compatibility criteria:

Primary Substitution Criteria:

Current Rating: 4 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)
Breaking Capacity @ Rated Voltage: 200 A (exact match required)

Parametric Equivalent Group (Littelfuse Inc. Series 313): All Littelfuse 0313004 variants meet the primary substitution criteria and are classified as active products. These include 0313004.HXIDP, 0313004.HXP, 0313004.MXP, 0313004.VXIDP, and 0313004.VXP.

Non-Equivalent Substitute: The SCHURTER 8020.5017 shares the 4 A current rating and slow-blow response time but differs in fuse material (ceramic vs. glass), voltage rating (500 V vs. 250 V), package format (non-standard vs. 3AB/3AG), and breaking capacity (1.5 kA vs. 200 A). This part is not a direct substitute for the 0034.5238.

Parameter Comparison

Parameter	SCHURTER 0034.5238	Littelfuse 0313004.HXIDP	Littelfuse 0313004.HXP	Littelfuse 0313004.MXP	Littelfuse 0313004.VXIDP	Littelfuse 0313004.VXP
Current Rating (Amps)	4 A	4 A	4 A	4 A	4 A	4 A
Voltage Rating - AC	250 V	250 V	250 V	250 V	250 V	250 V
Fuse Type	Cartridge, Glass	Cartridge, Glass	Cartridge, Glass	Cartridge, Glass	Cartridge, Glass	Cartridge, Glass
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"	3AB, 3AG, 1/4" x 1-1/4"
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 1.250" L (6.35mm x 31.75mm)
Breaking Capacity @ Rated Voltage	200 A	200 A	200 A	200 A	200 A	200 A
Operating Temperature Range	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C
Product Status	Obsolete	Active	Active	Active	Active	Active
Approval Agency	CSA, UL	CE, CSA, K-MARK, PSE, UL	CE, CSA, K-MARK, PSE, UL	CE, CSA, K-MARK, PSE, UL	CE, CSA, KC, PSE, UL	CE, CSA, KC, PSE, UL
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

The Littelfuse 0313004 series (variants HXIDP, HXP, MXP, VXIDP, VXP) provides direct parametric equivalence to the obsolete SCHURTER 0034.5238. All five variants maintain identical electrical and mechanical specifications, including 4 A current rating, 250 V AC voltage rating, slow-blow response, 3AB/3AG package format, and 200 A breaking capacity.

Selection among the Littelfuse variants should be based on product availability and certification requirements. All variants carry ROHS3 compliance and UL/CSA approvals. The 0313004.HXIDP, 0313004.HXP, and 0313004.MXP variants include K-MARK certification, while 0313004.VXIDP and 0313004.VXP include KC certification. The 0313004.MXP variant has the highest inventory availability at 3,952 pieces.

The SCHURTER 8020.5017 is not suitable as a substitute due to incompatible voltage rating (500 V vs. 250 V), fuse material (ceramic vs. glass), and package format (non-standard vs. 3AB/3AG).

Frequently Asked Questions (FAQ)

Q: Can the Littelfuse 0313004 series parts be used as direct replacements for the SCHURTER 0034.5238?

A: Yes. The Littelfuse 0313004 variants (HXIDP, HXP, MXP, VXIDP, VXP) are parametric equivalents that match all critical electrical and mechanical specifications: 4 A current rating, 250 V AC voltage rating, slow-blow response time, 3AB/3AG package format, and 200 A breaking capacity. All variants are active products with current manufacturing support.

Q: What is the difference between the various Littelfuse 0313004 part numbers?

A: The Littelfuse 0313004 variants differ primarily in certification scope. The HXIDP, HXP, and MXP variants include K-MARK certification, while VXIDP and VXP include KC certification. All variants maintain identical electrical performance and package specifications. Selection should be based on regional certification requirements and inventory availability.

Q: Why is the SCHURTER 8020.5017 not a suitable substitute?

A: The SCHURTER 8020.5017 differs in multiple critical parameters. It uses ceramic fuse material instead of glass, operates at 500 V AC instead of 250 V AC, uses a non-standard package format instead of 3AB/3AG, and has a breaking capacity of 1.5 kA instead of 200 A. These differences make it incompatible with circuits designed for the 0034.5238.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. The SCHURTER 0034.5238 and all Littelfuse 0313004 variants are ROHS3 compliant. All parts are also REACH unaffected.

Q: What holder types are compatible with these fuse cartridges?

A: These fuse cartridges require a compatible 3AB or 3AG fuse holder. The 1/4" x 1-1/4" (6.35mm x 31.75mm) dimensions are standard for these holder types. Verify holder compatibility before installation.

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