SCHURTER 0034.5143 Equivalent & Substitute Parts

Part Overview

The SCHURTER 0034.5143 is a 7 A 250 V AC/DC fast-blow glass fuse cartridge in 3AB/3AG package format (1/4" x 1-1/4"). This component is classified as obsolete but remains in stock with 820 units available. Due to its obsolete status, equivalent substitute parts from active manufacturers are necessary for ongoing system maintenance and new designs requiring identical electrical and mechanical specifications.

Key Parameters

Parameter	Value
Current Rating	7 A
Voltage Rating (AC)	250 V
Fuse Type	Cartridge, Glass
Response Time	Fast Blow
Package / Case	3AB, 3AG, 1/4" x 1-1/4"
Breaking Capacity @ Rated Voltage	200 A
Operating Temperature Range	-55°C ~ 125°C
Size / Dimension	0.250" Dia x 1.252" L (6.35mm x 31.80mm)
Approval Agency	CSA, UL
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the SCHURTER 0034.5143 is determined by strict equivalence across the following parameters:

Current Rating: 7 A (exact match required)
Voltage Rating (AC): 250 V (exact match required)
Fuse Type: Cartridge, Glass (exact match required)
Response Time: Fast Blow (exact match required)
Package / Case: 3AB, 3AG, 1/4" x 1-1/4" (exact match required)
Breaking Capacity @ Rated Voltage: 200 A (exact match required)
Operating Temperature Range: -55°C ~ 125°C (exact match or wider range acceptable)
Size / Dimension: 0.250" Dia x 1.252" L (exact match required)

All substitute parts listed below meet these criteria. The part 8020.5077 (SCHURTER ceramic fuse, 8 A, 500 V) does not qualify as a direct substitute due to differences in current rating, voltage rating, and fuse material composition.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Current Rating (A)	Voltage Rating (V AC)	Fuse Type	Response Time	Package / Case	Breaking Capacity (A)	Operating Temperature (°C)	Size / Dimension	Product Status
0034.5143	SCHURTER Inc.	7	250	Cartridge, Glass	Fast Blow	3AB, 3AG, 1/4" x 1-1/4"	200	-55 ~ 125	0.250" Dia x 1.252" L	Obsolete
0312007.HXP	Littelfuse Inc.	7	250	Cartridge, Glass	Fast Blow	3AB, 3AG, 1/4" x 1-1/4"	200	-55 ~ 125	0.250" Dia x 1.250" L	Active
0312007.VXP	Littelfuse Inc.	7	250	Cartridge, Glass	Fast Blow	3AB, 3AG, 1/4" x 1-1/4"	200	-55 ~ 125	0.250" Dia x 1.250" L	Active
0312007.MXP	Littelfuse Inc.	7	250	Cartridge, Glass	Fast Blow	3AB, 3AG, 1/4" x 1-1/4"	200	-55 ~ 125	0.250" Dia x 1.250" L	Active
AGC-7-R	Eaton - Electronics Division	7	250	Cartridge, Glass	Fast Blow	3AB, 3AG, 1/4" x 1-1/4"	200	-55 ~ 125	0.250" Dia x 1.250" L	Active
BK/AGC-7-R	Eaton - Electronics Division	7	250	Cartridge, Glass	Fast Blow	3AB, 3AG, 1/4" x 1-1/4"	200	-55 ~ 125	0.250" Dia x 1.250" L	Active
3AG 7-R	Bel Fuse Inc.	7	250	Cartridge, Glass	Fast Blow	3AB, 3AG, 1/4" x 1-1/4"	200	-55 ~ 125	0.250" Dia x 1.252" L	Active
FSA-7A	OptiFuse	7	250	Cartridge, Glass	Fast Blow	3AB, 3AG, 1/4" x 1-1/4"	200	-55 ~ 125	0.250" Dia x 1.252" L	Active

Engineering Selection Recommendations

All substitute parts listed above are electrically and mechanically equivalent to the SCHURTER 0034.5143. Selection among these alternatives should be based on the following factors:

Product Status: All substitute parts carry Active product status, ensuring long-term availability and supply chain continuity compared to the obsolete main part.

Regulatory Compliance: The Littelfuse 0312007 series (HXP, VXP, MXP) and Bel Fuse 3AG 7-R carry the broadest approval agency coverage (CE, CSA, KC, PSE, UL), providing maximum flexibility for international applications. The Eaton AGC series (AGC-7-R, BK/AGC-7-R) and OptiFuse FSA-7A maintain CSA and UL certifications suitable for North American markets.

Inventory Availability: Littelfuse 0312007.MXP offers the highest stock level (2472 units), followed by Eaton BK/AGC-7-R (3021 units) and OptiFuse FSA-7A (4205 units), supporting immediate procurement needs.

Dimensional Tolerance: All parts conform to the 3AB/3AG package standard. Minor dimensional variations (1.250" vs 1.252" length) fall within standard manufacturing tolerances and do not affect holder compatibility.

Frequently Asked Questions (FAQ)

Q: Can I use the SCHURTER 8020.5077 as a substitute for the 0034.5143?

A: No. The 8020.5077 is a ceramic fuse rated at 8 A and 500 V AC, which differs from the 0034.5143 specifications (7 A, 250 V AC, glass). Current and voltage ratings must match exactly for safe circuit protection.

Q: Are all listed substitute parts compatible with existing 3AB/3AG fuse holders?

A: Yes. All substitute parts conform to the 3AB/3AG package standard with dimensions 1/4" x 1-1/4" and are mechanically compatible with standard holders designed for this package format.

Q: What is the difference between the Littelfuse 0312007.HXP, 0312007.VXP, and 0312007.MXP variants?

A: These three Littelfuse parts are electrically and mechanically identical. The suffix designations (HXP, VXP, MXP) represent different manufacturing or packaging variants within the same product line. All three meet the same electrical specifications and are interchangeable.

Q: Do all substitute parts have the same breaking capacity as the original SCHURTER part?

A: Yes. All substitute parts listed maintain a breaking capacity of 200 A at rated voltage, matching the SCHURTER 0034.5143 specification.

Q: Which substitute part has the widest operating temperature range?

A: All substitute parts operate across the identical temperature range of -55°C to 125°C, matching the original SCHURTER part.

Q: Are there any RoHS compliance differences among the substitute parts?

A: All substitute parts are ROHS3 compliant, with the exception of the Eaton AGC-7-R, which carries RoHS Compliant status. Both designations indicate compliance with RoHS directives and are acceptable for modern applications.

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