SCHURTER 0034.5243 Equivalent & Substitute Parts

Part Overview

The SCHURTER 0034.5243 is a 7 A 250 V AC/DC glass cartridge fuse with slow-blow response characteristics, designed for 3AB and 3AG holder applications. This fuse operates across a temperature range of -55°C to 125°C and carries CSA and UL approvals. The part is currently listed as obsolete, making equivalent substitute parts necessary for ongoing system maintenance and new designs requiring this electrical specification.

Key Parameters

Parameter	Value
Current Rating	7 A
Voltage Rating (AC)	250 V
Fuse Type	Cartridge, Glass
Response Time	Slow Blow
Package / Case	3AB, 3AG, 1/4" x 1-1/4" (6.35mm x 31.75mm)
Breaking Capacity @ Rated Voltage	200 A
Operating Temperature Range	-55°C ~ 125°C
RoHS Status	ROHS3 Compliant
Approval Agencies	CSA, UL

Substitute Part Grouping Explanation

Substitution for the SCHURTER 0034.5243 is determined by strict equivalence across the following critical parameters:

Current Rating: 7 A (exact match required)
Voltage Rating: 250 V AC (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)
Breaking Capacity: 200 A (exact match required)

All substitute parts listed below meet these electrical and mechanical specifications. Substitutes are grouped by manufacturer and product status (active vs. obsolete).

Parameter Comparison

Manufacturer Part Number	Manufacturer	Current Rating (A)	Voltage Rating (V AC)	Response Time	Package / Case	Breaking Capacity (A)	Operating Temperature (°C)	Product Status	Approval Agencies
0034.5243	SCHURTER Inc.	7	250	Slow Blow	3AB, 3AG, 1/4" x 1-1/4"	200	-55 ~ 125	Obsolete	CSA, UL
BK/MDL-7-R	Eaton - Electronics Division	7	250	Slow Blow	3AB, 3AG, 1/4" x 1-1/4"	200	Not specified	Active	CE, CSA, UL
MDL-7-R	Eaton - Electronics Division	7	250	Slow Blow	3AB, 3AG, 1/4" x 1-1/4"	200	Not specified	Active	CE, CSA, UL
0313007.HXIDP	Littelfuse Inc.	7	250	Slow Blow	3AB, 3AG, 1/4" x 1-1/4"	200	-55 ~ 125	Active	CE, CSA, K-MARK, PSE, UL
0313007.HXP	Littelfuse Inc.	7	250	Slow Blow	3AB, 3AG, 1/4" x 1-1/4"	200	-55 ~ 125	Active	CE, CSA, K-MARK, PSE, UL
0313007.MXP	Littelfuse Inc.	7	250	Slow Blow	3AB, 3AG, 1/4" x 1-1/4"	200	-55 ~ 125	Active	CE, CSA, K-MARK, PSE, UL
0313007.VXIDP	Littelfuse Inc.	7	250	Slow Blow	3AB, 3AG, 1/4" x 1-1/4"	200	-55 ~ 125	Active	CE, CSA, KC, PSE, UL
0313007.VXP	Littelfuse Inc.	7	250	Slow Blow	3AB, 3AG, 1/4" x 1-1/4"	200	-55 ~ 125	Active	CE, CSA, KC, PSE, UL

Engineering Selection Recommendations

All substitute parts listed above are electrically and mechanically equivalent to the SCHURTER 0034.5243. Selection among these alternatives should be based on the following factors:

Product Status: Eaton MDL series (BK/MDL-7-R, MDL-7-R) and Littelfuse 313 series (0313007.HXIDP, 0313007.HXP, 0313007.MXP, 0313007.VXIDP, 0313007.VXP) are all active products with ongoing manufacturer support and availability.

Regulatory Compliance: All substitutes maintain ROHS3 compliance and REACH unaffected status. Littelfuse parts carry expanded approval certifications including K-MARK and PSE, providing broader geographic compliance coverage compared to the original SCHURTER part.

Temperature Range: Littelfuse 313 series parts explicitly specify the -55°C to 125°C operating range, matching the original SCHURTER specification. Eaton MDL series operating temperature is not specified in available data.

Availability: Littelfuse 0313007.MXP shows the highest current inventory (2807 pcs), followed by 0313007.HXIDP (1233 pcs) and 0313007.VXIDP (1101 pcs).

Frequently Asked Questions (FAQ)

Q: Can I use any of these substitute parts interchangeably with the SCHURTER 0034.5243?

A: Yes. All listed substitute parts meet the identical electrical specifications (7 A, 250 V AC, slow-blow response, 200 A breaking capacity) and mechanical requirements (3AB/3AG package, 1/4" x 1-1/4" dimensions). They are direct functional equivalents.

Q: What is the difference between the Littelfuse 313 series variants (HXP, HXIDP, MXP, VXIDP, VXP)?

A: All Littelfuse 313 series variants listed share identical electrical and mechanical parameters. Differences are limited to internal design characteristics (melting I²t and DC cold resistance values) and regulatory approval certifications. Selection among these variants should be based on specific regional compliance requirements or internal design specifications.

Q: Are there any temperature limitations I should consider?

A: The Littelfuse 313 series parts explicitly support the full -55°C to 125°C operating range specified for the original SCHURTER part. Eaton MDL series operating temperature specifications are not provided in available documentation. For applications requiring the full temperature range, Littelfuse parts provide documented compliance.

Q: What is the difference between BK/MDL-7-R and MDL-7-R from Eaton?

A: Both parts are electrically and mechanically equivalent with identical specifications. The designation difference reflects Eaton's internal product coding. Both are active products suitable for direct substitution.

Q: Do all substitute parts require the same holder type?

A: Yes. All substitute parts are specified for 3AB and 3AG holder applications with identical 1/4" x 1-1/4" (6.35mm x 31.75mm) dimensions. No holder modifications are required when switching between any of these parts.

Q: Which substitute offers the best long-term availability?

A: Littelfuse 313 series parts (0313007.HXP, 0313007.HXIDP, 0313007.MXP, 0313007.VXIDP, 0313007.VXP) are all active products with established market presence. Eaton MDL series parts are also active. The original SCHURTER 0034.5243 is obsolete and should not be specified for new designs.

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