SCHURTER 0034.4246 Equivalent & Substitute Parts

Part Overview

The SCHURTER 0034.4246 is a 500 mA, 125 V AC/DC board mount fuse in radial can package, designed for through-hole PCB applications. This component is classified as Active status and is ROHS3 compliant. Substitute parts are identified when equivalent electrical ratings, mechanical compatibility, and approval certifications align with the original specification, enabling direct replacement in circuit designs without functional compromise.

Key Parameters

Parameter	Value
Current Rating	500 mA
Voltage Rating (AC)	125 V
Voltage Rating (DC)	125 V
Fuse Type	Board Mount (Cartridge Style Excluded)
Mounting Type	Through Hole
Package / Case	Radial, Can
Response Time	Fast Blow
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility is determined by matching the following critical parameters:

Current Rating: 500 mA (exact match required)
Voltage Rating AC/DC: 125 V (exact match required)
Fuse Type: Board Mount (Cartridge Style Excluded)
Mounting Type: Through Hole
Response Time: Fast Blow
Package Style: Radial, Can configuration

The substitute parts listed below meet all mandatory electrical and mechanical criteria. Dimensional variations within the radial can package are acceptable provided through-hole lead spacing and PCB footprint compatibility are maintained.

Parameter Comparison

Parameter	SCHURTER 0034.4246	Littelfuse 0272.500H	Littelfuse 0272.500V	Littelfuse 0279.500V
Manufacturer	SCHURTER Inc.	Littelfuse	Littelfuse Inc.	Littelfuse Inc.
Current Rating (Amps)	500 mA	500 mA	500 mA	500 mA
Voltage Rating - AC	125 V	125 V	125 V	125 V
Voltage Rating - DC	125 V	125 V	125 V	125 V
Response Time	Fast Blow	Fast Blow	Fast Blow	Fast Blow
Fuse Type	Board Mount (Cartridge Style Excluded)	Board Mount (Cartridge Style Excluded)	Board Mount (Cartridge Style Excluded)	Board Mount (Cartridge Style Excluded)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	Radial, Can	Radial, Can, Vertical	Radial, Can, Vertical	Radial, Can, Vertical
Breaking Capacity @ Rated Voltage	100 A	10 kA	10 kA	10 kA
Melting I²t	0.02	0.0716	0.0716	0.0716
Operating Temperature Range	-25°C ~ 85°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 85°C
Size / Dimension	0.252" Dia x 0.346" H (6.40mm x 8.80mm)	0.235" Dia x 0.287" H (5.97mm x 7.30mm)	0.235" Dia x 0.287" H (5.97mm x 7.30mm)	0.250" Dia x 0.350" H (6.35mm x 8.89mm)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Approval Agency	cURus	CSA, QPL, UL	CSA, QPL, UL	CSA, QPL, UL

Engineering Selection Recommendations

All listed substitute parts satisfy the core electrical requirements: 500 mA current rating, 125 V AC/DC voltage rating, fast-blow response, and through-hole board mount configuration. All parts maintain ROHS3 compliance and are classified as Active products.

The Littelfuse MICRO™ 272 series (0272.500H and 0272.500V) provide higher breaking capacity (10 kA versus 100 A) and extended operating temperature range (-55°C to 125°C). These parts are qualified to CSA, QPL, and UL standards.

The Littelfuse MICRO™ 279 series (0279.500V) offers dimensional alignment closer to the original SCHURTER part (0.250" diameter versus 0.235") while maintaining the same electrical specifications and CSA, QPL, UL certifications. Operating temperature range is -55°C to 85°C.

Physical dimensions vary among substitutes. PCB layout verification is necessary to confirm lead spacing and mounting hole compatibility with the selected replacement part.

Frequently Asked Questions (FAQ)

Q: Can Littelfuse 0272.500H and 0272.500V be used interchangeably with SCHURTER 0034.4246?

A: Yes. Both parts meet the mandatory electrical criteria: 500 mA, 125 V AC/DC, fast-blow response, and through-hole board mount configuration. Dimensional differences (0.235" diameter versus 0.252") require PCB footprint verification to confirm lead hole compatibility.

Q: What is the difference between Littelfuse 0272.500H and 0272.500V?

A: Both parts are electrically and mechanically identical. The designation difference (H versus V) indicates orientation variants within the MICRO™ 272 series. Electrical performance, current rating, voltage rating, and breaking capacity are equivalent.

Q: Why does Littelfuse 0279.500V have a higher melting I²t value (0.0716) compared to SCHURTER 0034.4246 (0.02)?

A: Melting I²t is a thermal characteristic that affects fuse response time under fault conditions. The higher value in the Littelfuse part indicates a different thermal design. Both parts are rated for fast-blow response and 500 mA operation. Application-specific thermal analysis may be required if precise I²t matching is critical.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. SCHURTER 0034.4246 and all listed Littelfuse substitutes (0272.500H, 0272.500V, 0279.500V) are ROHS3 compliant.

Q: Which substitute part has the closest physical dimensions to the original SCHURTER part?

A: Littelfuse 0279.500V (0.250" diameter x 0.350" height) is dimensionally closest to SCHURTER 0034.4246 (0.252" diameter x 0.346" height). Littelfuse 0272.500H and 0272.500V are smaller (0.235" diameter x 0.287" height) and require PCB layout confirmation.

Q: What approval certifications do the substitute parts carry?

A: Littelfuse 0272.500H, 0272.500V, and 0279.500V are certified by CSA, QPL, and UL. SCHURTER 0034.4246 carries cURus certification. Verify that the selected substitute meets your application's regulatory requirements.

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