A3423LK-T Equivalent & Substitute Parts

Part Overview

The A3423LK-T is a digital switch special purpose magnetic sensor manufactured by Allegro MicroSystems, utilizing Hall Effect technology for magnetic field detection. This component is classified as obsolete, necessitating identification of equivalent substitute parts for ongoing design requirements and procurement needs. The part operates as an open drain output device with south pole polarization, designed for applications requiring reliable magnetic switching across extended temperature ranges.

Substiute Parts

A3423LK-T

Allegro MicroSystemsIn Stock: 1521A3423LK-T Datasheet

Current PartRFQ

A1230LK-T

Allegro MicroSystemsIn Stock: 8641A1230LK-T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The A1230LK-T qualifies as a manufacturer-recommended substitute based on the following alignment criteria:

Common Electrical Parameters:

• Hall Effect technology platform
• Open drain output configuration
• Through hole mounting (4-SIP package)
• Operating temperature range: -40°C ~ 150°C
• RoHS3 compliance
• 4-SSIP package compatibility

Substitution Logic: The A1230LK-T maintains the same package form factor, mounting technology, and output type as the A3423LK-T. Both components utilize Hall Effect sensing with open drain outputs suitable for digital switching applications. The substitute part is actively manufactured and maintains equivalent mechanical and electrical interface characteristics, enabling direct functional replacement in circuit designs.

Parameter Comparison

Engineering Selection Recommendations

The A1230LK-T is the manufacturer-recommended substitute for the obsolete A3423LK-T. Selection of this substitute is supported by:

• Active product status ensuring long-term availability and supply chain continuity
• Identical package and mounting configuration enabling direct PCB compatibility
• Matching operating temperature range (-40°C ~ 150°C) for equivalent thermal performance
• RoHS3 compliance alignment with environmental and regulatory requirements
• Automotive-grade qualification (AEC-Q100) providing enhanced reliability certification

Design integration requires verification that the A1230LK-T sensing range (3mT trip, -3mT release) and output current specification (20mA maximum) align with application-specific magnetic field detection and load-driving requirements. The substitute's lower supply current consumption (6mA vs. 14mA) and reduced output current capability represent electrical characteristic differences that must be evaluated against circuit design constraints.

Frequently Asked Questions (FAQ)

Q: Can the A1230LK-T directly replace the A3423LK-T in existing designs?

A: The A1230LK-T provides mechanical and electrical interface compatibility through identical 4-SSIP packaging and open drain output configuration. However, the different sensing thresholds (3mT vs. 5.5mT) and output current ratings (20mA vs. 30mA) require circuit-level verification before implementation.

Q: What are the key electrical differences between these parts?

A: The A1230LK-T operates at lower supply current (6mA vs. 14mA) and provides reduced maximum output current (20mA vs. 30mA). The sensing range differs significantly: 3mT trip/release versus 5.5mT trip/release. Supply voltage ranges overlap but are not identical (3.3V-18V vs. 3.8V-24V).

Q: Does the A1230LK-T support the same polarization as the A3423LK-T?

A: The A3423LK-T operates with south pole polarization only. The A1230LK-T supports both north and south pole polarization, providing additional application flexibility.

Q: What compliance certifications apply to the substitute part?

A: The A1230LK-T carries RoHS3 compliance, automotive-grade classification, and AEC-Q100 qualification. These certifications exceed the compliance profile of the obsolete A3423LK-T.

Q: Are both parts available in the same package configuration?

A: Both components utilize the 4-SSIP package with through-hole mounting, ensuring identical PCB footprint and assembly compatibility.