ATS137-WL-7-A Equivalent & Substitute Parts

Part Overview

The ATS137-WL-7-A is a unipolar Hall Effect magnetic switch manufactured by Diodes Incorporated in SC-59-3 surface mount packaging. This component functions as a digital switch with open collector output, designed for magnetic field detection applications. The part is currently obsolete, making equivalent substitute components necessary for new designs and ongoing production requirements. Substitute parts must maintain functional compatibility through matching Hall Effect technology, open collector output configuration, and compatible packaging standards.

Substiute Parts

ATS137-WL-7-A

Diodes IncorporatedIn Stock: 767ATS137-WL-7-A Datasheet

Current PartRFQ

SS345PT

Honeywell Sensing and Productivity SolutionsIn Stock: 17264SS345PT Datasheet

MFR RecommendedRFQ

TLE4946KHTSA1

Infineon TechnologiesIn Stock: 56429TLE4946KHTSA1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ATS137-WL-7-A is determined by the following critical parameters:

Technology Match: All substitute parts must use Hall Effect sensing technology with open collector output configuration to ensure functional equivalence in magnetic field detection circuits.

Package Compatibility: Substitute parts must be available in TO-236-3, SC-59, or SOT-23-3 packaging to maintain PCB layout compatibility and mechanical fit.

Electrical Operating Range: Substitute parts must support the supply voltage and output current requirements of the original design. The ATS137-WL-7-A operates at 4.6V ~ 20V supply with 25mA maximum output current.

Surface Mount Capability: All substitutes must be surface mount components to match the original mounting type.

The two identified substitute parts—SS345PT and TLE4946KHTSA1—meet these core substitution criteria through matching Hall Effect technology, open collector output, compatible packaging, and surface mount configuration. However, each substitute presents distinct electrical and operational characteristics that require evaluation based on specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

SS345PT Selection Criteria: This Honeywell substitute is suitable for applications operating within the 2.7V ~ 7V supply voltage range. The reduced output current capability (4mA maximum) requires verification against load requirements. The extended operating temperature range (-40°C ~ 150°C) and superior moisture sensitivity rating (MSL 1) provide advantages in harsh environmental conditions. This part is recommended for low-power applications with voltage constraints below 7V.

TLE4946KHTSA1 Selection Criteria: This Infineon substitute provides the closest output current match (20mA maximum) to the original ATS137-WL-7-A (25mA maximum). The supply voltage range (2.7V ~ 18V) accommodates the original design envelope. The automotive-grade qualification (AEC-Q100) and temperature-compensated features indicate suitability for demanding applications. The latch function differs from the original unipolar switch function, requiring circuit-level evaluation. This part is recommended for applications requiring higher output current and automotive-grade reliability.

Both substitutes maintain active product status, ensuring long-term availability and supply chain stability compared to the obsolete original part.

Frequently Asked Questions (FAQ)

Q: Can SS345PT directly replace ATS137-WL-7-A in all applications?

A: SS345PT is functionally compatible through matching Hall Effect technology and open collector output. However, the reduced supply voltage range (2.7V ~ 7V versus 4.6V ~ 20V) and lower output current (4mA versus 25mA) require verification against specific circuit requirements. Applications operating above 7V supply voltage or requiring output currents exceeding 4mA are not suitable for this substitute.

Q: What is the functional difference between the unipolar switch and latch function?

A: The ATS137-WL-7-A operates as a unipolar switch, providing output state changes based on magnetic field presence. The TLE4946KHTSA1 operates as a latch, maintaining output state through magnetic field transitions. This functional difference requires circuit-level evaluation to determine compatibility with the original application logic.

Q: Are both substitutes available in the same package as the original part?

A: Yes. Both SS345PT and TLE4946KHTSA1 are available in TO-236-3, SC-59, and SOT-23-3 packaging, matching the original ATS137-WL-7-A package options. PCB layout compatibility is maintained across all three parts.

Q: Which substitute offers better long-term availability?

A: Both SS345PT and TLE4946KHTSA1 maintain active product status with established manufacturers (Honeywell and Infineon respectively), ensuring superior long-term availability compared to the obsolete ATS137-WL-7-A. Current inventory levels (17,200 units for SS345PT and 56,400 units for TLE4946KHTSA1) indicate robust supply chain support.

Q: Do the substitutes meet the same compliance standards as the original part?

A: Both substitutes maintain RoHS compliance. The TLE4946KHTSA1 matches the original ROHS3 compliance status. Both parts carry EAR99 ECCN classification matching the original part. The TLE4946KHTSA1 includes automotive-grade qualification (AEC-Q100), providing additional certification beyond the original part specifications.