HAL574SF-K Equivalent & Substitute Parts

Part Overview

The HAL574SF-K is a unipolar Hall effect magnetic switch manufactured by TDK-Micronas GmbH, designed for digital switching applications with current source output. The device operates across a wide supply voltage range (3.75V to 24V) and features temperature compensation for stable performance in industrial environments.

This part is currently classified as obsolete. Finding equivalent or substitute components is necessary to maintain design continuity, ensure supply chain reliability, and support long-term product availability for applications requiring unipolar magnetic switching functionality.

Substiute Parts

HAL574SF-K

TDK-Micronas GmbHIn Stock: 1098HAL574SF-K Datasheet

Current PartRFQ

HAL1566 SU-A

TDK-Micronas GmbHIn Stock: 20763HAL1566 SU-A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the HAL574SF-K is evaluated based on the following critical parameters that define functional equivalence:

Core Functional Parameters:

• Technology: Hall Effect magnetic sensing
• Function: Unipolar Switch operation
• Polarization: South Pole detection
• Mounting Type: Surface Mount

Electrical Compatibility Parameters:

• Supply Voltage Range: Must accommodate the original 3.75V ~ 24V specification
• Output Type: Current Source vs. Open Drain (determines circuit interface requirements)
• Sensing Range: Trip and release thresholds must be compatible with application requirements

Environmental & Compliance Parameters:

• Operating Temperature Range
• RoHS Compliance Status
• Moisture Sensitivity Level

The HAL1566 SU-A is identified as a manufacturer-recommended substitute. While it maintains the same core technology (Hall Effect unipolar switch, South Pole), it differs in output type (Open Drain vs. Current Source) and sensing thresholds, requiring circuit-level evaluation for specific applications.

Parameter Comparison

Engineering Selection Recommendations

The HAL1566 SU-A is the manufacturer-recommended substitute for the obsolete HAL574SF-K. Both devices are manufactured by TDK-Micronas GmbH and maintain core Hall effect unipolar switching functionality with South Pole polarization.

Key Considerations for Selection:

The HAL1566 SU-A is classified as Active product status, ensuring ongoing availability and supply chain support compared to the obsolete HAL574SF-K. Both parts maintain RoHS compliance (RoHS Compliant and ROHS3 Compliant respectively) and identical moisture sensitivity ratings.

Critical Differences Requiring Evaluation:

Output Type differs between the two devices. The HAL574SF-K provides Current Source output, while the HAL1566 SU-A provides Open Drain output. This difference requires circuit redesign to accommodate the alternative output interface.

Sensing thresholds differ: HAL574SF-K operates at 12mT Trip / 5mT Release, while HAL1566 SU-A operates at 9.4mT Trip / 7.6mT Release. Applications with specific magnetic field sensitivity requirements must validate compatibility.

Operating temperature range differs: HAL574SF-K supports -40°C to 85°C, while HAL1566 SU-A supports -40°C to 70°C. Applications requiring operation above 70°C must evaluate alternative solutions.

Supply voltage range for HAL1566 SU-A (2.7V ~ 24V) is broader at the lower end compared to HAL574SF-K (3.75V ~ 24V), providing additional flexibility for low-voltage applications.

Package form factors differ: HAL574SF-K uses SOT-89B-1 (TO-243AA variant), while HAL1566 SU-A uses SOT-23-3 (TO-236-3 / SC-59). PCB layout and footprint modifications are required.

Frequently Asked Questions (FAQ)

Q: Can the HAL1566 SU-A directly replace the HAL574SF-K without circuit modifications?

A: No. The HAL1566 SU-A differs in output type (Open Drain vs. Current Source), sensing thresholds, operating temperature range, and package form factor. Circuit redesign is required to accommodate these differences.

Q: What is the primary reason for substitution?

A: The HAL574SF-K is classified as obsolete. The HAL1566 SU-A is the manufacturer-recommended active substitute, ensuring long-term availability and supply chain continuity.

Q: Are both parts RoHS compliant?

A: Yes. The HAL574SF-K is RoHS Compliant, and the HAL1566 SU-A is ROHS3 Compliant. Both meet RoHS requirements.

Q: What are the key electrical differences?

A: The HAL574SF-K provides Current Source output with 17mA maximum supply current, while the HAL1566 SU-A provides Open Drain output. Sensing thresholds differ (12mT/5mT vs. 9.4mT/7.6mT). Supply voltage ranges differ slightly (3.75V-24V vs. 2.7V-24V).

Q: Can the HAL1566 SU-A operate at temperatures above 70°C?

A: The HAL1566 SU-A is rated for -40°C to 70°C operation. Applications requiring operation above 70°C must evaluate alternative components, as the HAL574SF-K supported up to 85°C.

Q: What package changes are required?

A: The HAL574SF-K uses SOT-89B-1 packaging, while the HAL1566 SU-A uses SOT-23-3 packaging. PCB footprint redesign and layout modifications are necessary.

Q: Are both parts from the same manufacturer?

A: Yes. Both the HAL574SF-K and HAL1566 SU-A are manufactured by TDK-Micronas GmbH, ensuring consistent design philosophy and support.

Q: What is the moisture sensitivity rating for both parts?

A: Both parts have Moisture Sensitivity Level 1 (Unlimited), indicating no moisture sensitivity restrictions for storage or handling.