AH337-WL-7 Equivalent & Substitute Parts

Part Overview

The AH337-WL-7 is a Hall effect magnetic sensor IC manufactured by Diodes Incorporated, packaged in SC-59-3 (SOT-23-3) surface mount configuration. This digital switch component is designed for magnetic field detection applications requiring 25mA output current capability. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain functional and mechanical compatibility.

Substiute Parts

AH337-WL-7

Diodes IncorporatedIn Stock: 2285AH337-WL-7 Datasheet

Current PartRFQ

A1101ELHLT-T

Allegro MicroSystemsIn Stock: 1473A1101ELHLT-T Datasheet

MFR RecommendedRFQ

A1125LLHLT-T

Allegro MicroSystemsIn Stock: 1900A1125LLHLT-T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the AH337-WL-7 is determined by the following critical parameters:

• Package Compatibility: Both substitute parts use SOT-23W packaging, which is mechanically compatible with the original SC-59-3 footprint for surface mount applications
• Output Current Rating: Both substitutes maintain the 25mA maximum output current specification
• Output Type: Open drain configuration matches the original design topology
• Technology: Hall effect magnetic sensing technology consistent with the original part
• Polarization: South pole sensing orientation maintained across all alternatives
• Compliance: ROHS3 compliance and EAR99 ECCN classification preserved

The two identified substitutes differ in sensing sensitivity and operating temperature range, allowing selection based on specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

A1101ELHLT-T is suitable for applications requiring standard operating temperature range (-40°C to 85°C) with moderate magnetic field sensitivity (17.5mT trip threshold). This part is actively manufactured and maintains full ROHS3 compliance.

A1125LLHLT-T is specified for extended temperature operation (-40°C to 150°C) and automotive-grade applications, carrying AEC-Q100 qualification. This part features higher magnetic field sensitivity (5mT trip threshold) and lower supply current consumption (4mA maximum). Selection of this substitute is appropriate for automotive or high-temperature environments where the extended operating range and automotive qualification are required.

Both substitutes are active products with improved moisture sensitivity ratings (MSL 1) compared to the obsolete AH337-WL-7 (MSL 3), providing superior reliability in moisture-sensitive applications.

Frequently Asked Questions (FAQ)

Q: Are the SOT-23W packages used in the substitute parts compatible with the original SC-59-3 footprint?

A: SOT-23W and SC-59 are mechanically and electrically compatible surface mount packages for three-terminal Hall effect sensors. PCB footprints designed for SC-59-3 will accommodate SOT-23W devices without modification.

Q: What is the primary difference between the two substitute parts?

A: The A1101ELHLT-T operates to 85°C with 17.5mT magnetic field sensitivity, while the A1125LLHLT-T extends to 150°C with 5mT sensitivity and includes automotive AEC-Q100 qualification. Supply current consumption differs, with A1125LLHLT-T drawing 4mA maximum versus 7.5mA for the A1101ELHLT-T.

Q: Do both substitute parts maintain the 25mA output current specification?

A: Yes, both A1101ELHLT-T and A1125LLHLT-T are rated for 25mA maximum output current, matching the original AH337-WL-7 specification.

Q: What is the significance of the improved Moisture Sensitivity Level in the substitute parts?

A: The substitute parts carry MSL 1 (Unlimited) rating compared to the original MSL 3 (168 Hours). This indicates superior moisture resistance and reduced risk of moisture-induced failures during storage and assembly processes.

Q: Which substitute should be selected for automotive applications?

A: The A1125LLHLT-T is specified for automotive use with AEC-Q100 qualification and extended temperature range (-40°C to 150°C), making it the appropriate choice for automotive magnetic sensor applications.

Q: Are both substitute parts ROHS3 compliant?

A: Yes, both A1101ELHLT-T and A1125LLHLT-T are ROHS3 compliant and REACH unaffected, maintaining the same regulatory compliance as the original AH337-WL-7.