SCHURTER 7022.0540 Ceramic Cartridge Fuse - Equivalent & Substitute Parts

Part Overview

The SCHURTER 7022.0540 is a 250 mA, 500 V AC/DC ceramic cartridge fuse with fast-blow response characteristics, designed for 3AB and 3AG holder applications. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system maintenance and new design implementations. The fuse provides 150 kA breaking capacity at rated voltage and operates across a temperature range of -40°C to 85°C.

Substiute Parts

7022.0540

SCHURTER Inc.In Stock: 9057022.0540 Datasheet

Current PartRFQ

35402500029

Littelfuse Inc.In Stock: 125235402500029 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for ceramic cartridge fuses is determined by the following critical parameters:

• Current Rating: Must match exactly at 250 mA
• Fuse Type: Must be Cartridge, Ceramic construction
• Response Time: Must be Fast Blow
• Package / Case: Must be compatible with 3AB, 3AG holder systems and maintain 1/4" x 1-1/4" form factor
• Voltage Rating - AC: Must meet or exceed the application requirement

The Littelfuse 35402500029 qualifies as a substitute based on matching current rating (250 mA), fuse type (Cartridge, Ceramic), response time (Fast Blow), and package compatibility (3AB, 3AG, 1/4" x 1-1/4"). The voltage rating of 440 V AC is lower than the original 500 V specification; therefore, this substitute is suitable only for applications operating at or below 440 V AC.

Parameter Comparison

Engineering Selection Recommendations

The Littelfuse 35402500029 is an active product with ROHS3 compliance and REACH unaffected status, providing supply continuity for the obsolete SCHURTER 7022.0540. Both components share identical current ratings, fuse type, response characteristics, and holder compatibility.

Selection of the Littelfuse substitute requires verification that the application voltage requirement does not exceed 440 V AC. The Littelfuse component operates within a narrower temperature range (-25°C to 70°C) compared to the original (-40°C to 85°C); applications requiring operation below -25°C or above 70°C must retain the original SCHURTER specification or identify alternative sources.

Dimensional tolerances between the two components are minimal (diameter: 0.250" vs 0.248"; length: 1.252" vs 1.260"), and both are compatible with standard 3AB and 3AG holder systems.

Frequently Asked Questions (FAQ)

Q: Can the Littelfuse 35402500029 be used in all applications currently using the SCHURTER 7022.0540?

A: The Littelfuse substitute is compatible with applications operating at 440 V AC or lower. Applications requiring the full 500 V AC rating of the original component require alternative sourcing. Temperature range differences must also be evaluated for extreme environment applications.

Q: Are there dimensional compatibility issues between these two fuses?

A: Both fuses are designed for 3AB and 3AG holder systems with 1/4" x 1-1/4" form factors. Dimensional variations (0.250" vs 0.248" diameter; 1.252" vs 1.260" length) are within standard holder tolerances and do not affect mechanical compatibility.

Q: What is the significance of the Fast Blow response time classification?

A: Fast Blow fuses are designed to interrupt circuits rapidly in response to overcurrent conditions. Both the SCHURTER and Littelfuse components share this characteristic, ensuring equivalent protection response in the circuit application.

Q: Do both components meet current regulatory compliance requirements?

A: Both the SCHURTER 7022.0540 and Littelfuse 35402500029 are ROHS3 compliant and REACH unaffected, meeting current regulatory standards for electronic component use.

Q: What is the breaking capacity specification, and does it differ between these components?

A: The SCHURTER 7022.0540 specifies 150 kA breaking capacity at rated voltage. The Littelfuse 35402500029 does not provide a breaking capacity specification in available documentation. Breaking capacity should be confirmed with the manufacturer for critical applications.