TLE4945-2G Equivalent & Substitute Parts

Part Overview

The TLE4945-2G is a bipolar magnetic switch sensor manufactured by Infineon Technologies, utilizing Hall Effect technology for digital switching applications. This component features open collector output with temperature compensation and operates across a 4V to 18V supply range. The product is currently obsolete, necessitating identification of functionally equivalent alternatives from active manufacturers to maintain design continuity and ensure long-term component availability.

Key Parameters

Parameter	TLE4945-2G
Manufacturer	Infineon Technologies
Function	Bipolar Switch
Technology	Hall Effect
Output Type	Open Collector
Sensing Range (Trip/Release)	6mT / -6mT
Voltage Supply	4V ~ 18V
Current Supply (Max)	5mA
Current Output (Max)	100mA
Operating Temperature	-40°C ~ 150°C
Package / Case	TO-243AA
Features	Temperature Compensated
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the TLE4945-2G is determined by the following critical parameters:

Core Functional Requirements:

Hall Effect bipolar switch technology
Open collector output configuration
TO-243AA package compatibility
Temperature compensation capability

Electrical Compatibility Criteria:

Supply voltage range must encompass or exceed 4V ~ 18V
Output current capability must support 100mA maximum
Sensing range (trip/release thresholds) must match or provide equivalent sensitivity for the application

Environmental & Compliance:

Operating temperature range must cover -40°C ~ 150°C
Surface mount mounting type
Active product status preferred for long-term availability

The four substitute parts (SS50AT, SS511AT, SS513AT, SS51T) are all Honeywell Sensing and Productivity Solutions Hall Effect bipolar switches in TO-243AA variants with open collector output and active product status. Substitution differences are determined by sensing range thresholds and supply voltage specifications.

Parameter Comparison

Parameter	TLE4945-2G	SS50AT	SS511AT	SS513AT	SS51T
Manufacturer	Infineon	Honeywell	Honeywell	Honeywell	Honeywell
Function	Bipolar Switch	Bipolar Switch	Bipolar Switch	Bipolar Switch	Bipolar Switch
Technology	Hall Effect	Hall Effect	Hall Effect	Hall Effect	Hall Effect
Output Type	Open Collector	Open Collector	Open Collector	Open Collector	Open Collector
Sensing Range (Trip/Release)	6mT / -6mT	17mT / -17mT	6mT / -6mT	14mT / -14mT	14mT / -14mT
Voltage Supply	4V ~ 18V	4.5V ~ 24V	3.8V ~ 30V	3.8V ~ 30V	4.5V ~ 24V
Current Supply (Max)	5mA	10mA	10mA	10mA	10mA
Current Output (Max)	100mA	20mA	20mA	20mA	20mA
Operating Temperature	-40°C ~ 150°C	-40°C ~ 125°C	-40°C ~ 150°C	-40°C ~ 150°C	-40°C ~ 150°C
Package / Case	TO-243AA	TO-243AA (Variant)	TO-243AA (Variant)	TO-243AA (Variant)	TO-243AA (Variant)
Features	Temperature Compensated	—	Temperature Compensated	Temperature Compensated	Temperature Compensated
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	—	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant

Engineering Selection Recommendations

SS511AT provides the closest functional match to the TLE4945-2G. It maintains identical sensing range thresholds (6mT trip, -6mT release), temperature compensation, and full operating temperature range (-40°C ~ 150°C). Supply voltage range (3.8V ~ 30V) encompasses the original 4V ~ 18V specification. Active product status and RoHS compliance ensure long-term availability and regulatory alignment.

SS513AT offers an alternative with 14mT sensing thresholds and temperature compensation across the full -40°C ~ 150°C range. This part suits applications where slightly higher magnetic field sensitivity is acceptable. Extended supply voltage range (3.8V ~ 30V) and active status provide design flexibility.

SS51T shares the 14mT sensing range and temperature compensation of SS513AT with supply voltage range of 4.5V ~ 24V. Tape & Reel packaging supports high-volume production environments.

SS50AT operates with 17mT sensing thresholds without temperature compensation and reduced operating temperature range (-40°C ~ 125°C). This part is suitable only for applications where higher magnetic field thresholds and standard temperature ranges are acceptable.

All substitute parts are RoHS compliant and maintain active product status, supporting regulatory requirements and supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can SS50AT directly replace TLE4945-2G in all applications?

A: SS50AT differs in three critical parameters: sensing range (17mT vs. 6mT), absence of temperature compensation, and reduced operating temperature range (-40°C ~ 125°C vs. -40°C ~ 150°C). Direct substitution is valid only for applications where these differences do not affect performance requirements.

Q: Which substitute provides the best compatibility with the original TLE4945-2G?

A: SS511AT matches the TLE4945-2G across all critical parameters: 6mT sensing range, temperature compensation, and -40°C ~ 150°C operating temperature. Supply voltage range (3.8V ~ 30V) fully encompasses the original 4V ~ 18V specification.

Q: What is the significance of the TO-243AA package variant designation?

A: All substitute parts use TO-243AA package variants, maintaining mechanical and electrical compatibility with the original TLE4945-2G footprint. Variant designations indicate minor package refinements that do not affect PCB layout or mounting procedures.

Q: How do sensing range differences affect substitution decisions?

A: Sensing range (trip and release thresholds) determines the magnetic field strength required to activate the switch. SS511AT (6mT) matches the original. SS513AT and SS51T (14mT) require stronger magnetic fields. SS50AT (17mT) requires the strongest fields. Selection depends on the magnetic field strength available in the application.

Q: Are all substitute parts RoHS compliant?

A: Yes. SS50AT, SS511AT, SS513AT, and SS51T are all RoHS compliant, meeting current environmental and regulatory requirements for electronic component manufacturing and use.

Q: What is the impact of output current differences (100mA vs. 20mA)?

A: The TLE4945-2G supports 100mA maximum output current, while all substitute parts support 20mA. Applications requiring output currents exceeding 20mA require external driver circuitry or alternative component selection.

Q: Does temperature compensation affect substitution compatibility?

A: Temperature compensation maintains consistent switching thresholds across the operating temperature range. SS50AT lacks this feature, while SS511AT, SS513AT, and SS51T include it. Applications operating across wide temperature ranges benefit from temperature-compensated parts.

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