HAL503 SF-K Equivalent & Substitute Parts

Part Overview

The HAL503 SF-K is a digital switch Hall effect magnetic sensor manufactured by TDK-Micronas GmbH, designed for surface mount applications in the SOT-89B-1 package. This component operates as an open drain output device with temperature compensation across a supply voltage range of 3.8V to 24V and an operating temperature range of -40°C to 140°C. The product is currently classified as obsolete, making identification of suitable substitute components essential for ongoing design support and production continuity.

Substiute Parts

HAL503 SF-K

TDK-Micronas GmbHIn Stock: 735HAL503 SF-K Datasheet

Current PartRFQ

HAL1503SU-A

TDK-Micronas GmbHIn Stock: 17437HAL1503SU-A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The HAL1503SU-A qualifies as a manufacturer-recommended substitute for the HAL503 SF-K based on the following core substitution criteria:

Functional Equivalence: Both components are Hall effect magnetic sensors with open drain output configuration, manufactured by the same supplier (TDK-Micronas GmbH), ensuring design compatibility at the functional level.

Supply Voltage Compatibility: The HAL1503SU-A operates within a 2.7V to 24V supply range, which encompasses the HAL503 SF-K operating range of 3.8V to 24V. This overlap ensures the substitute can function in existing circuit designs without modification to power supply specifications.

Output Type Consistency: Both devices feature open drain output architecture, maintaining electrical interface compatibility with existing pull-up resistor networks and downstream logic circuits.

Surface Mount Technology: Both components utilize surface mount packaging, preserving PCB assembly compatibility and manufacturing processes.

Magnetic Sensing Technology: Both employ Hall effect sensing principles, maintaining the same physical detection mechanism and magnetic field interaction characteristics.

Key Differentiators: The HAL1503SU-A is classified as a unipolar switch with specified sensing parameters (5.5mT trip, 3.7mT release) and operates across a narrower temperature range (-40°C to 70°C). The substitute uses a smaller SOT-23-3 package compared to the original SOT-89B-1 package, requiring PCB layout modification.

Parameter Comparison

Engineering Selection Recommendations

The HAL1503SU-A is the manufacturer-recommended substitute for the obsolete HAL503 SF-K. Selection of this substitute is appropriate when the following conditions are met:

Product Status Consideration: The HAL503 SF-K is obsolete and no longer in active production. The HAL1503SU-A maintains active product status with confirmed inventory availability (17,378 pieces), ensuring long-term supply chain continuity.

Compliance and Certification: The HAL1503SU-A is ROHS3 compliant with MSL rating of 1 (Unlimited), meeting modern regulatory requirements for electronic components. Both components share the same ECCN (EAR99) and HTSUS (8542.39.0001) classifications.

Temperature Range Limitation: Applications requiring operation above 70°C junction temperature cannot use the HAL1503SU-A as a direct substitute. The original HAL503 SF-K supports operation to 140°C. In such cases, alternative components must be evaluated.

Package Footprint Change: Implementation of the HAL1503SU-A requires PCB redesign due to the transition from SOT-89B-1 to SOT-23-3 package. This change affects board layout, routing, and assembly processes.

Supply Voltage Margin: The HAL1503SU-A minimum supply voltage of 2.7V is lower than the HAL503 SF-K minimum of 3.8V, providing additional design flexibility for low-voltage applications.

Frequently Asked Questions (FAQ)

Q: Can the HAL1503SU-A directly replace the HAL503 SF-K without PCB modification?

A: No. The HAL1503SU-A uses a SOT-23-3 package while the HAL503 SF-K uses SOT-89B-1. These packages have different pin configurations and footprints, requiring PCB layout redesign and component repositioning.

Q: What is the maximum operating temperature for the HAL1503SU-A?

A: The HAL1503SU-A operates to a maximum junction temperature of 70°C. Applications requiring operation above this temperature cannot use this substitute.

Q: Are both components compatible with the same supply voltage range?

A: The HAL1503SU-A supply range (2.7V to 24V) encompasses the HAL503 SF-K range (3.8V to 24V). The substitute can operate at lower voltages, but both function within the 3.8V to 24V overlap region.

Q: What is the functional difference between these Hall effect sensors?

A: The HAL1503SU-A is specified as a unipolar switch with defined sensing parameters (5.5mT trip, 3.7mT release). The HAL503 SF-K specifications do not include these polarization and sensing range parameters in the provided data.

Q: Is the HAL1503SU-A RoHS compliant?

A: Yes. The HAL1503SU-A is ROHS3 compliant with MSL rating of 1 (Unlimited), meeting current environmental and regulatory standards.

Q: What packaging format is available for the HAL1503SU-A?

A: The HAL1503SU-A is supplied in Tape & Reel (TR) format, suitable for automated assembly processes.