A3240EUA-T Equivalent & Substitute Parts

Part Overview

The A3240EUA-T is a unipolar magnetic switch utilizing Hall Effect technology, designed for digital switching applications with open collector output. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing system support and new design implementations. The part operates across a wide supply voltage range (4.2V to 24V) with a sensing range of 5mT for both trip and release thresholds, suitable for applications requiring reliable magnetic field detection in industrial and consumer electronics environments.

Substiute Parts

A3240EUA-T

Allegro MicroSystemsIn Stock: 1209A3240EUA-T Datasheet

Current PartRFQ

A1120EUA-T

Allegro MicroSystemsIn Stock: 26633A1120EUA-T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the A3240EUA-T is determined by the following critical parameters:

• Technology & Function: Hall Effect unipolar switch operation
• Polarization: South Pole detection capability
• Sensing Characteristics: Trip and release thresholds compatible with application requirements
• Electrical Specifications: Supply voltage range, supply current, and output current ratings
• Output Configuration: Open collector or open drain topology
• Package Compatibility: 3-SSIP through-hole mounting
• Operating Temperature Range: -40°C to 85°C
• Compliance Standards: RoHS3 compliance and regulatory status

The A1120EUA-T qualifies as a direct substitute based on matching technology, polarization, package type, and operating temperature range. While minor variations exist in sensing thresholds and output type, these differences remain within acceptable substitution parameters for Hall Effect unipolar switch applications.

Parameter Comparison

Engineering Selection Recommendations

The A1120EUA-T is the designated substitute for the obsolete A3240EUA-T. Selection of this alternative is supported by the following factors:

• Product Status: The A1120EUA-T maintains active production status, ensuring long-term availability and supply chain continuity compared to the obsolete A3240EUA-T.
• Compliance Certification: Both parts maintain ROHS3 compliance and REACH unaffected status, meeting regulatory requirements for industrial and consumer applications.
• Automotive Grade: The A1120EUA-T carries AEC-Q100 qualification, providing enhanced reliability assurance for automotive and mission-critical applications.
• Core Functionality: Identical Hall Effect technology, South Pole polarization, and 3-SSIP package ensure mechanical and functional compatibility in existing designs.
• Electrical Compatibility: Matching output current rating (25mA maximum) and operating temperature range (-40°C to 85°C) support direct replacement in most applications.

Minor parameter differences (supply voltage lower limit of 3V versus 4.2V, release threshold of 0.5mT versus 5mT, and open drain versus open collector output) require circuit-level evaluation for specific applications but do not preclude substitution in standard magnetic switch implementations.

Frequently Asked Questions (FAQ)

Q: Can the A1120EUA-T directly replace the A3240EUA-T in existing designs?

A: Yes, the A1120EUA-T is functionally compatible as a substitute. Both parts use Hall Effect technology with South Pole polarization, operate across -40°C to 85°C, and share the 3-SSIP through-hole package. Circuit design review is recommended to confirm compatibility with the open drain output configuration and release threshold characteristics.

Q: What is the primary difference between the A3240EUA-T and A1120EUA-T?

A: The main differences are product status (obsolete versus active), output type (open collector versus open drain), release threshold (5mT versus 0.5mT), and minimum supply voltage (4.2V versus 3V). The A1120EUA-T also includes AEC-Q100 automotive qualification.

Q: Are both parts RoHS compliant?

A: Yes, both the A3240EUA-T and A1120EUA-T are ROHS3 compliant and REACH unaffected, meeting environmental and regulatory standards for industrial applications.

Q: Does the package type remain the same for substitution?

A: Yes, both parts use the 3-SSIP through-hole package, ensuring identical PCB footprint and mounting compatibility.

Q: Why is the A1120EUA-T recommended over the obsolete A3240EUA-T?

A: The A1120EUA-T is actively manufactured by Allegro MicroSystems, ensuring reliable supply availability. The obsolete status of the A3240EUA-T creates long-term sourcing risk and limits access to new inventory.