A3340LUA-T Equivalent & Substitute Parts

Part Overview

The A3340LUA-T is a unipolar magnetic switch utilizing Hall Effect technology, designed for digital switching applications with open collector output. This component operates across a wide supply voltage range (4.2V to 24V) and features a sensing range of 5mT trip with 0.5mT release characteristics. The part is classified as obsolete, necessitating identification of active equivalent components for new designs and ongoing production requirements.

Substiute Parts

A3340LUA-T

Allegro MicroSystemsIn Stock: 947A3340LUA-T Datasheet

Current PartRFQ

A1125LUA-T

Allegro MicroSystemsIn Stock: 9135A1125LUA-T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The A1125LUA-T qualifies as a direct substitute based on the following critical parameters:

Matching Parameters:

• Function: Unipolar Switch (identical)
• Technology: Hall Effect (identical)
• Polarization: South Pole (identical)
• Sensing Range: 5mT Trip, 0.5mT Release (identical)
• Operating Temperature: -40°C ~ 150°C (identical)
• Mounting Type: Through Hole (identical)
• Package / Case: 3-SSIP (identical)
• Current - Output (Max): 25mA (identical)
• RoHS Status: ROHS3 Compliant (identical)

Allowable Variations:

• Output Type: Open Collector (A3340LUA-T) vs. Open Drain (A1125LUA-T) — functionally compatible in most switching applications
• Voltage - Supply: 4.2V ~ 24V (A3340LUA-T) vs. 3V ~ 24V (A1125LUA-T) — substitute provides extended lower voltage capability
• Current - Supply (Max): 6mA (A3340LUA-T) vs. 4mA (A1125LUA-T) — substitute operates at lower supply current
• Product Status: Obsolete (A3340LUA-T) vs. Active (A1125LUA-T) — substitute is in active production

Parameter Comparison

Engineering Selection Recommendations

The A1125LUA-T is the appropriate substitute for the obsolete A3340LUA-T. The substitute maintains identical functional and electrical characteristics across all critical parameters: sensing range, operating temperature, output current capacity, and package form factor.

The A1125LUA-T offers additional advantages: active product status ensures ongoing availability and manufacturing support, extended lower supply voltage range (3V minimum vs. 4.2V), and automotive-grade qualification with AEC-Q100 certification. The output type difference (Open Drain vs. Open Collector) is functionally compatible in standard switching circuit topologies.

Selection of the A1125LUA-T eliminates obsolescence risk while maintaining full electrical and mechanical compatibility with existing designs.

Frequently Asked Questions (FAQ)

Q: What is the primary reason for substituting the A3340LUA-T? A: The A3340LUA-T is classified as obsolete. The A1125LUA-T is the active equivalent that maintains identical sensing characteristics and package specifications.

Q: Are the output types (Open Collector vs. Open Drain) interchangeable? A: Yes. Both output types function as switching elements in standard circuit configurations. Open Drain and Open Collector are functionally equivalent in most applications requiring pull-up resistor networks.

Q: Does the A1125LUA-T support the same supply voltage range? A: The A1125LUA-T extends the lower supply voltage limit to 3V (compared to 4.2V minimum for the A3340LUA-T), while maintaining the 24V upper limit. This provides broader voltage compatibility.

Q: Are the packages identical? A: Yes. Both components use the 3-SSIP package with Through Hole mounting, ensuring direct mechanical compatibility.

Q: What certifications does the A1125LUA-T carry? A: The A1125LUA-T holds automotive-grade qualification and AEC-Q100 certification, providing additional reliability assurance for demanding applications.

Q: Is the sensing range identical between the two parts? A: Yes. Both components feature 5mT trip threshold and 0.5mT release threshold, ensuring identical magnetic field detection characteristics.