A1185LUA-T Equivalent & Substitute Parts

Part Overview

The A1185LUA-T is a unipolar magnetic switch utilizing Hall Effect technology, designed for automotive-grade applications. This component functions as a digital switch with current source output and programmable trip point capability. The part is classified as obsolete, necessitating identification of active equivalent components to maintain design continuity and ensure long-term supply chain reliability for new production and field service applications.

Substiute Parts

A1185LUA-T

Allegro MicroSystemsIn Stock: 687A1185LUA-T Datasheet

Current PartRFQ

A1193LUA-T

Allegro MicroSystemsIn Stock: 1131A1193LUA-T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the A1185LUA-T is determined by the following critical parameters:

• Functional equivalence: Unipolar switch with Hall Effect technology and current source output
• Polarization: South pole sensing capability
• Programmable sensing range: Trip point adjustability requirement
• Supply voltage compatibility: Operating range must encompass or be contained within 4.6V ~ 24V
• Thermal performance: Operating temperature range of -40°C ~ 150°C (TA)
• Automotive qualification: AEC-Q100 certification required
• Package compatibility: 3-SSIP through-hole mounting
• Regulatory compliance: ROHS3 and REACH requirements

The A1193LUA-T qualifies as a direct substitute based on matching all functional, environmental, and compliance parameters while maintaining identical package and mounting specifications.

Parameter Comparison

Engineering Selection Recommendations

The A1193LUA-T is the qualified substitute for the obsolete A1185LUA-T based on the following engineering criteria:

Product Status: The A1193LUA-T maintains active production status, ensuring continued availability and supply chain stability compared to the obsolete A1185LUA-T.

Compliance and Certification: Both components carry identical automotive-grade qualification (AEC-Q100) and regulatory compliance (ROHS3 Compliant, REACH Unaffected), meeting all automotive industry standards.

Electrical Performance: The A1193LUA-T operates within a compatible supply voltage range (3V ~ 24V) that encompasses the original specification (4.6V ~ 24V). The reduced maximum supply current (6.9mA versus 17mA) represents improved power efficiency without functional degradation.

Thermal and Environmental Specifications: Identical operating temperature range (-40°C ~ 150°C) ensures equivalent thermal performance across all application environments.

Package and Mounting: Identical 3-SSIP through-hole package specification guarantees direct mechanical and electrical compatibility without PCB redesign.

Frequently Asked Questions (FAQ)

Q: Can the A1193LUA-T be used as a direct replacement for the A1185LUA-T in existing designs?

A: Yes. The A1193LUA-T is electrically and mechanically compatible with the A1185LUA-T. Both components share identical package specifications (3-SSIP), mounting type (through hole), functional characteristics (unipolar Hall Effect switch with programmable trip point), and automotive qualifications (AEC-Q100). No circuit redesign is required.

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

A: The primary differences are product status and power consumption. The A1185LUA-T is obsolete, while the A1193LUA-T is in active production. The A1193LUA-T has a lower maximum supply current specification (6.9mA versus 17mA) and a slightly extended lower supply voltage limit (3V versus 4.6V). These differences favor the substitute part.

Q: Are there any voltage compatibility concerns when substituting?

A: No. The A1193LUA-T supply voltage range (3V ~ 24V) fully encompasses the original specification (4.6V ~ 24V). Applications designed for the A1185LUA-T will operate within the compatible voltage window of the substitute.

Q: Do both parts require the same PCB footprint?

A: Yes. Both the A1185LUA-T and A1193LUA-T use the 3-SSIP package with through-hole mounting. PCB layouts designed for the original part require no modification for the substitute.

Q: Are there any compliance or certification differences?

A: No. Both components are AEC-Q100 qualified, ROHS3 compliant, and REACH unaffected. They meet identical automotive industry standards and regulatory requirements.

Q: Why is the A1185LUA-T obsolete?

A: The A1185LUA-T has been discontinued by the manufacturer. The A1193LUA-T represents the active equivalent in the Allegro MicroSystems product line, offering improved power efficiency and continued supply availability.