A1143LUA-T Equivalent & Substitute Parts

Part Overview

The A1143LUA-T is a unipolar magnetic switch utilizing Hall Effect technology, manufactured by Allegro MicroSystems. This component functions as a digital switch with current source output, designed for applications requiring magnetic field detection with south pole polarization. The A1143LUA-T is classified as obsolete, making identification of active equivalent parts essential for ongoing design support and procurement continuity. The substitute part A1153LUA-T provides functional equivalence while maintaining active product status.

Substiute Parts

A1143LUA-T

Allegro MicroSystemsIn Stock: 1123A1143LUA-T Datasheet

Current PartRFQ

A1153LUA-T

Allegro MicroSystemsIn Stock: 806A1153LUA-T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the A1143LUA-T with the A1153LUA-T is based on equivalence across the following critical parameters:

• Function: Both are unipolar switches
• Technology: Both utilize Hall Effect sensing
• Polarization: Both detect south pole magnetic fields
• Sensing Range: Identical trip and release thresholds (11mT trip, 4.5mT release)
• Output Type: Both provide current source output
• Operating Temperature Range: Both operate across -40°C ~ 150°C
• Mounting Type: Both are through-hole mounted
• Package: Both use 3-SSIP package configuration
• Supply Current: Both draw maximum 17mA

The A1153LUA-T represents the active product continuation with identical electrical and mechanical specifications, differing only in product status and supply voltage minimum specification.

Parameter Comparison

Engineering Selection Recommendations

The A1153LUA-T is the direct substitute for the obsolete A1143LUA-T. Both components maintain identical electrical characteristics, sensing parameters, and mechanical form factors. The A1153LUA-T carries active product status from Allegro MicroSystems, ensuring ongoing availability and manufacturing support.

Both parts satisfy ROHS3 compliance and REACH regulatory requirements. The A1153LUA-T extends the minimum supply voltage specification to 3V, providing enhanced compatibility with lower-voltage system designs compared to the A1143LUA-T minimum of 4.6V.

For new designs or production transitions, the A1153LUA-T is the appropriate selection. Existing designs using the A1143LUA-T can transition to the A1153LUA-T without circuit modification, provided supply voltage remains within the 4.6V ~ 24V operating range of both parts.

Frequently Asked Questions (FAQ)

Q: Can the A1153LUA-T directly replace the A1143LUA-T in existing circuits?

A: Yes. The A1153LUA-T provides direct functional and mechanical equivalence. Both components share identical sensing thresholds, output characteristics, temperature ratings, and package configuration. No circuit redesign is required.

Q: What is the primary difference between these parts?

A: The A1143LUA-T is obsolete, while the A1153LUA-T is active production. The A1153LUA-T also specifies a lower minimum supply voltage of 3V versus 4.6V for the A1143LUA-T.

Q: Are there any compliance or certification differences?

A: No. Both parts are ROHS3 compliant, REACH unaffected, and carry identical moisture sensitivity ratings (MSL 1 - Unlimited).

Q: Does package compatibility require any PCB modifications?

A: No. Both parts use the 3-SSIP package configuration and are through-hole mounted. PCB layouts designed for the A1143LUA-T accommodate the A1153LUA-T without modification.

Q: What is the sensing range for both parts?

A: Both the A1143LUA-T and A1153LUA-T detect south pole magnetic fields with an 11mT trip threshold and 4.5mT release threshold.

Q: Are there supply voltage considerations for substitution?

A: Both parts operate across the 4.6V ~ 24V range. The A1153LUA-T extends compatibility to 3V minimum, making it suitable for lower-voltage applications where the A1143LUA-T would not operate.