ATS137-WG-7-A Equivalent & Substitute Parts

Part Overview

The ATS137-WG-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 substitutes necessary for new designs and ongoing production requirements. Substitute parts must maintain functional compatibility through matching electrical characteristics, output type, and mechanical form factor while accommodating the operational constraints of the target application.

Substiute Parts

ATS137-WG-7-A

Diodes IncorporatedIn Stock: 5226ATS137-WG-7-A Datasheet

Current PartRFQ

AH3373-W-7

Diodes IncorporatedIn Stock: 1721AH3373-W-7 Datasheet

MFR RecommendedRFQ

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-WG-7-A is determined by the following critical parameters:

Primary Compatibility Criteria:

• Hall Effect technology (required for magnetic sensing principle)
• Surface mount packaging within TO-236-3, SC-59, or SOT-23-3 form factors
• Open collector or open drain output configuration
• Supply voltage range overlap with 4.6V ~ 20V
• Output current capability of at least 25mA

Secondary Compatibility Considerations:

• Sensing range and trip/release thresholds must be evaluated against application requirements
• Operating temperature range must encompass the target application environment
• Polarization (South Pole vs. North Pole) affects magnetic field orientation requirements

The three identified substitutes (AH3373-W-7, SS345PT, TLE4946KHTSA1) share the core Hall Effect technology and surface mount packaging but differ in output type, sensing characteristics, and operational specifications. Each substitute requires evaluation against specific application constraints.

Parameter Comparison

Engineering Selection Recommendations

AH3373-W-7 (Diodes Incorporated): This substitute maintains South Pole polarization and open drain output, providing the closest functional alignment to the ATS137-WG-7-A. The extended supply voltage range (3V ~ 28V) and superior output current capability (55mA) accommodate broader application requirements. The lower trip threshold (5.5mT) requires circuit-level evaluation for sensitivity compatibility. Active product status and ROHS3 compliance support long-term availability and regulatory requirements.

SS345PT (Honeywell Sensing and Productivity Solutions): This substitute offers open collector output matching the original part but operates with North Pole polarization, requiring magnetic field orientation reversal. The restricted supply voltage range (2.7V ~ 7V) limits applicability to lower-voltage systems. The significantly reduced output current (4mA) may constrain load-driving capability. Active product status and RoHS compliance are maintained. Selection requires explicit verification of magnetic field polarity and output current requirements.

TLE4946KHTSA1 (Infineon Technologies): This substitute functions as a latch rather than a unipolar switch, introducing different operational behavior through latching logic. South Pole polarization and open collector output align with the original part. The extended operating temperature range (-40°C ~ 150°C) and automotive-grade qualification (AEC-Q100) support demanding environments. Output current (20mA) approaches the original specification. Latch functionality requires circuit redesign to accommodate state retention characteristics.

Frequently Asked Questions (FAQ)

Q: Can the AH3373-W-7 directly replace the ATS137-WG-7-A without circuit modification?

A: The AH3373-W-7 shares Hall Effect technology, South Pole polarization, and compatible packaging. However, the output type differs (open drain vs. open collector), requiring pull-up resistor configuration verification. The lower trip threshold (5.5mT vs. 10mT) may alter sensitivity characteristics. Circuit-level validation is necessary.

Q: Why does the SS345PT have North Pole polarization while the original part uses South Pole?

A: Polarization determines the magnetic field direction that triggers the switch. North Pole vs. South Pole represents opposite field orientations. Substitution with reversed polarization requires magnetic field orientation adjustment in the application.

Q: What is the functional difference between the unipolar switch (ATS137-WG-7-A) and the latch (TLE4946KHTSA1)?

A: A unipolar switch responds to a single magnetic field polarity with trip and release thresholds. A latch maintains its output state after triggering until a reverse field condition resets it. This introduces state retention behavior requiring different circuit logic.

Q: Is the reduced output current of SS345PT (4mA) compatible with the original 25mA specification?

A: Output current capability determines the maximum load that can be driven. The SS345PT's 4mA limit is significantly lower than the original 25mA. Substitution is only viable if the application load current requirement is below 4mA.

Q: Do all substitute parts maintain ROHS3 compliance?

A: AH3373-W-7 and TLE4946KHTSA1 are ROHS3 compliant. SS345PT carries RoHS compliance without the specific ROHS3 designation. Regulatory requirements should be verified against application standards.

Q: Can the ATS137-WG-7-A operate at temperatures below -20°C?

A: The original part specification limits operation to -20°C ~ 85°C. All three substitutes extend the lower temperature limit to -40°C, providing enhanced cold-temperature performance for applications requiring sub-zero operation.