SCHURTER 0034.5220 Equivalent & Substitute Parts

Part Overview

The SCHURTER 0034.5220 is a 600 mA, 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 meets CSA and UL approval standards. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain identical electrical and mechanical specifications for continued system support and procurement.

Key Parameters

Parameter	Value
Current Rating	600 mA
Voltage Rating (AC)	250 V
Fuse Type	Cartridge, Glass
Response Time	Slow Blow
Package / Case	3AB, 3AG, 1/4" x 1-1/4"
Breaking Capacity @ Rated Voltage	35 A
Operating Temperature Range	-55°C to 125°C
Size / Dimension	0.250" Dia x 1.250" L (6.35mm x 31.75mm)
Approval Agency	CSA, UL
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the SCHURTER 0034.5220 is determined by strict equivalence across the following parameters: current rating (600 mA), voltage rating (250 V AC), fuse type (cartridge glass), response time (slow blow), physical dimensions (0.250" Dia x 1.250" L), and holder compatibility (3AB, 3AG). All identified substitutes are manufactured by Littelfuse Inc. under the 313 series and maintain identical electrical characteristics and mechanical form factors. The substitutes differ from the original part only in product status (active versus obsolete) and minor variations in melting I²t values (4 versus 4.91) and DC cold resistance specifications, which do not affect functional equivalence within the specified application parameters.

Parameter Comparison

Parameter	SCHURTER 0034.5220	Littelfuse 0313.600HXP	Littelfuse 0313.600MXP	Littelfuse 0313.600VXP
Manufacturer	SCHURTER Inc.	Littelfuse Inc.	Littelfuse Inc.	Littelfuse Inc.
Current Rating (Amps)	600 mA	600 mA	600 mA	600 mA
Voltage Rating - AC	250 V	250 V	250 V	250 V
Fuse Type	Cartridge, Glass	Cartridge, Glass	Cartridge, Glass	Cartridge, Glass
Response Time	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"
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)
Breaking Capacity @ Rated Voltage	35 A	35 A	35 A	35 A
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C
Approval Agency	CSA, UL	CE, CSA, UL	CE, CSA, UL	CE, CSA, UL
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Active	Active

Engineering Selection Recommendations

All three Littelfuse 313 series alternatives (0313.600HXP, 0313.600MXP, 0313.600VXP) provide direct functional equivalence to the obsolete SCHURTER 0034.5220. Selection among these active substitutes should be based on procurement availability and inventory status. The Littelfuse alternatives carry expanded approval certifications (CE, CSA, UL) compared to the original part (CSA, UL), providing enhanced regulatory coverage. All substitutes maintain ROHS3 compliance and are classified as REACH unaffected, ensuring environmental and regulatory alignment with the original specification.

Frequently Asked Questions (FAQ)

Q: Can the Littelfuse 313 series fuses directly replace the SCHURTER 0034.5220 in existing applications?

A: Yes. The Littelfuse 0313.600HXP, 0313.600MXP, and 0313.600VXP maintain identical current rating (600 mA), voltage rating (250 V AC), fuse type (cartridge glass), response time (slow blow), physical dimensions (0.250" Dia x 1.250" L), and holder compatibility (3AB, 3AG). These parameters define functional equivalence for cartridge fuse applications.

Q: What is the difference between the three Littelfuse substitute part numbers?

A: The 0313.600HXP, 0313.600MXP, and 0313.600VXP are all part of the Littelfuse 313 series and share identical electrical and mechanical specifications. Differences exist only in internal construction characteristics (melting I²t and DC cold resistance values), which do not affect their equivalence as substitutes for the SCHURTER 0034.5220 within the specified application parameters.

Q: Are the substitute fuses compatible with existing 3AB and 3AG holders?

A: Yes. All substitute fuses are specified for 3AB and 3AG holder applications with identical physical dimensions (0.250" Dia x 1.250" L / 6.35mm x 31.75mm), ensuring mechanical and electrical compatibility with existing holder installations.

Q: Do the Littelfuse substitutes meet the same regulatory approvals as the original SCHURTER part?

A: The Littelfuse substitutes exceed the original approvals. The SCHURTER 0034.5220 carries CSA and UL certifications, while the Littelfuse alternatives carry CE, CSA, and UL certifications, providing broader regulatory coverage.

Q: Is there any difference in operating temperature range between the original and substitute parts?

A: No. Both the SCHURTER 0034.5220 and all Littelfuse substitutes operate across the identical temperature range of -55°C to 125°C.

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