SS361RT Equivalent & Substitute Parts Reference

Part Overview

The SS361RT is an active Hall Effect magnetic switch latch manufactured by Honeywell Sensing and Productivity Solutions. This digital switch operates as an open collector device in a surface mount SOT-23-3 package, designed for applications requiring magnetic field detection with latch functionality. The device maintains active product status with substantial inventory availability (37,422 pieces in stock). Equivalent and substitute parts are identified to support procurement flexibility, supply chain continuity, and application-specific requirements where alternative magnetic sensor latches meet the same functional and electrical specifications.

Substiute Parts

SS361RT

Honeywell Sensing and Productivity SolutionsIn Stock: 37512SS361RT Datasheet

Current PartRFQ

TLE4946KHTSA1

Infineon TechnologiesIn Stock: 56429TLE4946KHTSA1 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SS361RT are identified based on strict alignment with the following critical parameters:

Functional Equivalence:

• Function: Latch operation
• Technology: Hall Effect magnetic sensing
• Output Type: Open Collector configuration

Electrical Compatibility:

• Supply voltage range must accommodate the SS361RT operating range (3V ~ 24V) or provide overlap
• Maximum output current must equal or exceed 20mA
• Operating temperature range must span -40°C to 150°C

Mechanical & Package Compatibility:

• Mounting type: Surface Mount
• Package designation: TO-236-3, SC-59, or SOT-23-3 (physically and electrically equivalent)

Regulatory & Environmental:

• RoHS compliance status (RoHS Compliant or ROHS3 Compliant acceptable)
• Moisture Sensitivity Level 1 (Unlimited)

The TLE4946KHTSA1 from Infineon Technologies meets these substitution criteria through functional equivalence in Hall Effect latch operation, open collector output, surface mount configuration, and compatible packaging. Electrical parameters remain within acceptable substitution boundaries despite differences in polarization and sensing range thresholds.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection (SS361RT): The SS361RT remains the primary choice for applications where the specified supply voltage range (3V ~ 24V) and North Pole polarization are design requirements. Active product status and substantial inventory (37,422 pieces) ensure supply continuity and lead time predictability.

Substitute Selection (TLE4946KHTSA1): The TLE4946KHTSA1 serves as a functional substitute where:

• Supply voltage requirements fall within the 2.7V ~ 18V range
• South Pole polarization is acceptable for the magnetic field orientation in the application
• Lower supply current consumption (6mA vs. 8mA) provides power efficiency benefits
• Automotive-grade qualification (AEC-Q100) and temperature compensation features are advantageous for demanding environments
• ROHS3 compliance satisfies updated regulatory requirements

Both parts maintain equivalent output current capability (20mA), operating temperature range (-40°C ~ 150°C), and surface mount SOT-23-3 packaging. Selection between these parts depends on specific application voltage requirements, magnetic field polarity, and supply chain availability rather than functional capability.

Frequently Asked Questions (FAQ)

Q1: Can the TLE4946KHTSA1 directly replace the SS361RT in existing designs?

A: Direct replacement is possible only if the application supply voltage operates within the TLE4946KHTSA1 range (2.7V ~ 18V) and the magnetic field polarity is South Pole. The SS361RT operates at North Pole polarization; reversing magnet orientation or selecting a North Pole variant of the TLE4946 series may be required. Both devices share identical SOT-23-3 packaging and open collector output, enabling pin-compatible substitution.

Q2: What is the significance of the polarization difference (North Pole vs. South Pole)?

A: Polarization determines which magnetic field direction triggers the sensor. North Pole polarization (SS361RT) activates when the North Pole of a magnet approaches the sensor. South Pole polarization (TLE4946KHTSA1) activates with South Pole approach. In applications with fixed magnet orientation, selecting the correct polarization is mandatory. Reversing magnet placement or selecting an alternative sensor variant with matching polarization ensures proper operation.

Q3: Are the sensing range thresholds (Trip/Release values) critical for substitution?

A: Sensing range thresholds are application-specific parameters. The SS361RT specifies -12mT Trip and 12mT Release, while the TLE4946KHTSA1 specifies 19mT Trip and -19mT Release. These differences reflect distinct magnetic field sensitivity levels. Substitution is valid only if the application's magnetic field strength and hysteresis requirements align with the substitute part's thresholds. Magnetic field strength verification during design validation is necessary.

Q4: What does "Temperature Compensated" mean for the TLE4946KHTSA1?

A: Temperature compensation is a feature that maintains consistent sensor performance across the operating temperature range (-40°C ~ 150°C) by electronically adjusting internal parameters to offset temperature-induced drift. Both the SS361RT and TLE4946KHTSA1 operate across the same temperature range; the TLE4946KHTSA1 includes active compensation to enhance stability. This feature is beneficial in applications experiencing wide temperature variations.

Q5: How do the supply current specifications (8mA vs. 6mA) affect circuit design?

A: Maximum supply current represents the peak current drawn by the sensor during operation. The SS361RT draws up to 8mA, while the TLE4946KHTSA1 draws up to 6mA. In power-constrained applications, the TLE4946KHTSA1 offers lower power consumption. Both values are well within typical microcontroller and logic circuit current sourcing capabilities. This parameter is secondary to output current (20mA) in determining circuit load requirements.

Q6: What is the difference between RoHS Compliant and ROHS3 Compliant?

A: RoHS Compliant indicates conformance to the original Restriction of Hazardous Substances directive, restricting lead, cadmium, mercury, and other hazardous materials. ROHS3 Compliant represents compliance with the updated RoHS 3 directive (2015/863/EU), which extends restrictions to additional substances including phthalates. Both designations confirm environmental and regulatory compliance; ROHS3 represents the current standard. Either designation is acceptable for new designs.

Q7: Does AEC-Q100 qualification affect substitution decisions?

A: AEC-Q100 is an automotive-grade qualification standard ensuring reliability in automotive applications through rigorous testing and quality requirements. The TLE4946KHTSA1 carries AEC-Q100 qualification, while the SS361RT does not list this certification. For automotive applications, the TLE4946KHTSA1 provides additional assurance of reliability and quality. For non-automotive applications, this qualification is not a substitution requirement.

Q8: Are there inventory or lead time considerations for substitution?

A: The SS361RT maintains substantial inventory (37,422 pieces in stock), ensuring immediate availability. The TLE4946KHTSA1 also shows strong inventory (56,400 pieces in stock). Both parts support rapid procurement without extended lead times. Substitution decisions should prioritize application compatibility over inventory levels; both parts demonstrate supply availability.