SCHURTER 0034.5224 Equivalent & Substitute Parts

Part Overview

The SCHURTER 0034.5224 is an 800 mA, 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 substitute parts necessary for ongoing system maintenance and new designs. The fuse requires a compatible holder for installation and is approved by CSA and UL standards.

Key Parameters

Parameter	Value
Current Rating	800 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 ~ 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 for the SCHURTER 0034.5224 is based on strict electrical and mechanical parameter matching:

Qualifying Parameters:

Current Rating: 800 mA (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)
Breaking Capacity @ Rated Voltage: 35 A (exact match required)
Operating Temperature Range: -55°C ~ 125°C (exact match required)
Size / Dimension: 0.250" Dia x 1.250" L (6.35mm x 31.75mm) (exact match required)

All three Littelfuse 313 series parts (0313.800MXP, 0313.800HXP, 0313.800VXP) meet these criteria and are direct parametric equivalents. The primary distinction between the SCHURTER original and Littelfuse substitutes is product status: the original is obsolete, while all substitutes are active production parts.

Parameter Comparison

Parameter	SCHURTER 0034.5224	Littelfuse 0313.800MXP	Littelfuse 0313.800HXP	Littelfuse 0313.800VXP
Manufacturer	SCHURTER Inc.	Littelfuse Inc.	Littelfuse Inc.	Littelfuse Inc.
Current Rating (Amps)	800 mA	800 mA	800 mA	800 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"
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
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)
Melting I²t	10.5	8	8	8
Approval Agency	CSA, UL	CE, CSA, UL	CE, CSA, UL	CE, CSA, UL
Product Status	Obsolete	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

All three Littelfuse 313 series parts are direct parametric equivalents to the SCHURTER 0034.5224. Selection among the three substitutes should be based on:

Product Status: All Littelfuse substitutes are active production parts, ensuring long-term availability and supply chain continuity compared to the obsolete SCHURTER original.

Compliance & Certifications: The Littelfuse substitutes carry CE, CSA, and UL approvals, providing broader regulatory coverage than the SCHURTER original (CSA, UL only). Both maintain ROHS3 compliance and REACH unaffected status.

Electrical Performance: All substitutes maintain the same current rating (800 mA), voltage rating (250 V AC), breaking capacity (35 A), and operating temperature range (-55°C ~ 125°C). The Littelfuse parts specify a melting I²t of 8 compared to the SCHURTER value of 10.5; this represents a tighter thermal characteristic within the slow-blow fuse classification and does not affect functional compatibility.

Mechanical Compatibility: All substitutes are identical in physical dimensions (0.250" Dia x 1.250" L) and package format (3AB, 3AG), ensuring direct mechanical fit in existing fuse holders.

Frequently Asked Questions (FAQ)

Q: Can the Littelfuse 313 series parts directly replace the SCHURTER 0034.5224?

A: Yes. All three Littelfuse substitutes (0313.800MXP, 0313.800HXP, 0313.800VXP) are parametric equivalents meeting identical electrical and mechanical specifications. They install in the same 3AB/3AG fuse holders without modification.

Q: What is the difference between the three Littelfuse substitute parts?

A: The three Littelfuse 313 series parts are parametrically identical. Differences exist only in internal construction or manufacturing variants, not in electrical performance or physical dimensions. Selection can be based on inventory availability.

Q: Does the difference in melting I²t (10.5 vs. 8) affect compatibility?

A: No. Both values fall within the slow-blow fuse classification for 800 mA cartridge fuses. The Littelfuse value of 8 represents a tighter thermal characteristic but maintains the same functional response time category and does not compromise circuit protection.

Q: Are the Littelfuse substitutes approved for the same applications as the SCHURTER original?

A: Yes. The Littelfuse substitutes carry CSA and UL approvals matching the SCHURTER original, plus additional CE certification. All maintain ROHS3 compliance and REACH unaffected status, supporting equivalent regulatory requirements.

Q: Why is the SCHURTER 0034.5224 marked as obsolete?

A: Obsolescence indicates the part is no longer in active production. The Littelfuse 313 series substitutes are active production parts, ensuring continued availability for system maintenance and new designs.

Q: Can these fuses be used in DC applications?

A: The specifications indicate 250 V AC/DC rating. All parts are suitable for both AC and DC circuits within the 250 V maximum voltage specification.

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