A1425LK Equivalent & Substitute Parts

Part Overview

The A1425LK is a digital switch magnetic sensor manufactured by Allegro MicroSystems, designed for special purpose applications using Hall Effect technology. This component operates as an open drain switch with temperature compensation across automotive-grade specifications. The A1425LK is currently classified as obsolete, making identification of active equivalent parts essential for ongoing design support and procurement continuity.

Substiute Parts

A1425LK

Allegro MicroSystemsIn Stock: 713A1425LK Datasheet

Current PartRFQ

A1425LK-T

Allegro MicroSystemsIn Stock: 4232A1425LK-T Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the A1425LK is determined by strict equivalence across the following critical parameters:

• Technology & Function: Hall Effect digital switch with special purpose application
• Electrical Characteristics: Identical sensing range (1.1mT trip, -1.1mT release), supply voltage (4V–26.5V), output type (open drain), and current ratings
• Mechanical Compatibility: Through-hole mounting, 4-SSIP package configuration
• Environmental & Compliance: Automotive grade, AEC-Q100 qualification, operating temperature range (-40°C to 150°C)
• Polarization: South pole sensing orientation

The A1425LK-T meets all substitution criteria as a direct equivalent with identical electrical and mechanical specifications.

Parameter Comparison

Engineering Selection Recommendations

The A1425LK-T is the direct substitute for the obsolete A1425LK. Both components share identical electrical and mechanical specifications, ensuring pin-for-pin and functional compatibility. The primary distinction is product lifecycle status: the A1425LK is obsolete while the A1425LK-T maintains active production status.

For new designs or ongoing procurement, the A1425LK-T is the appropriate selection. The A1425LK-T additionally provides ROHS3 compliance, addressing regulatory requirements that the original A1425LK does not meet. Both components maintain AEC-Q100 automotive qualification and identical performance characteristics across the full operating temperature range.

Frequently Asked Questions (FAQ)

Q: Can the A1425LK-T directly replace the A1425LK in existing designs?

A: Yes. The A1425LK-T is electrically and mechanically identical to the A1425LK. Both components feature the same 4-SSIP through-hole package, identical sensing range, supply voltage, output current ratings, and operating temperature specifications. No circuit modifications are required.

Q: What is the difference between A1425LK and A1425LK-T?

A: The primary differences are product status and RoHS compliance. The A1425LK is obsolete and RoHS non-compliant, while the A1425LK-T is an active product with ROHS3 compliance. All electrical and mechanical parameters are identical.

Q: Are there any package or pinout differences?

A: No. Both the A1425LK and A1425LK-T use the 4-SSIP package with identical through-hole mounting configuration. Pinout and mechanical dimensions are equivalent.

Q: What certifications apply to both parts?

A: Both components hold AEC-Q100 automotive qualification and are rated for automotive-grade applications. The A1425LK-T additionally meets ROHS3 environmental compliance standards.

Q: Can I use the A1425LK-T in applications originally designed for the A1425LK?

A: Yes. The A1425LK-T is a direct functional and physical equivalent. It operates identically across the -40°C to 150°C temperature range with the same 1.1mT sensing threshold and open drain output characteristics.