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Home > Products > Sensors, Transducers > Magnetic Sensors > Switches (Solid State)

Infineon Technologies TLE4957C2E6247HAMA1

Name: TLE4957C2E6247HAMA1
Brand: Infineon Technologies
SKU: TLE4957C2E6247HAMA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TLE4957C2E6247HAMA1

Manufacturer:: Infineon Technologies

Category:: Switches (Solid State)

Package:: -

Datasheet:: TLE4957C2E6247HAMA1.pdf

Description:: MAGNETIC SWITCH HALL EFF SSO-3

Quantity:: RFQ Add To RFQ list

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Inventory:4,358

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Product details

Overview

TLE4957C2E6247HAMA1 from Infineon Technologies is a bipolar latching Hall-effect switch in SSO-3 package, operating from 4.5 V to 24 V supply, with ±1.5 mT magnetic operate point (B_OP), -1.5 mT release point (B_RP), and built-in reverse-polarity protection. It is used for precise position sensing in automotive door latch and seatbelt buckle detection systems.

For engineers reviewing the TLE4957C2E6247HAMA1 datasheet, TLE4957C2E6247HAMA1 pinout, TLE4957C2E6247HAMA1 application, or TLE4957C2E6247HAMA1 equivalent, key selection criteria include magnetic sensitivity tolerance, supply voltage range, output polarity configuration, and AEC-Q100 qualification status for automotive use.

Technical Context

This device implements a chopper-stabilized Hall sensor with integrated Schmitt trigger and open-drain NMOS output stage. Its bipolar latching behavior requires alternating North and South pole exposure to toggle state, ensuring immunity to stray field interference.

The SSO-3 package enables surface-mount integration into compact automotive modules, and internal ESD protection (±8 kV HBM) supports robust operation in harsh environments without external clamping components.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage Range	4.5 V to 24 V - supports direct connection to automotive battery rail without external regulation
Magnetic Operate Point (B_OP)	±1.5 mT - enables reliable switching at small air gaps with standard ferrite magnets
Magnetic Release Point (B_RP)	∓1.5 mT - provides 0 mT hysteresis, suitable for zero-crossing detection in rotating targets
Output Type	Open-drain NMOS - allows wired-OR configuration and pull-up to any logic-compatible voltage
Operating Temperature	-40 °C to +150 °C - qualified per AEC-Q100 Grade 0 for under-hood applications
Reverse Polarity Protection	Integrated up to -24 V - eliminates need for external series diode in battery-reversal-prone systems

Pinout & Package

SSO-3 (Small Outline Package, 3-pin, leadless) with exposed thermal pad; dimensions 2.9 mm × 2.5 mm × 0.9 mm; RoHS-compliant, halogen-free.

Pin/Terminal	Circuit Role	Design Meaning
V_BB	Supply input	Accepts 4.5–24 V DC; internally regulated to power sensor and logic blocks
GND	Ground reference	Common return path for supply and output current; tied to thermal pad for thermal dissipation
OUT	Open-drain output	Sinks current when active; requires external pull-up; compatible with 3.3 V or 5 V logic interfaces

Key Features

Feature	Design Value
Bipolar latching operation	Eliminates need for continuous magnetic field presence-state persists until opposite pole is applied
Chopper stabilization	Reduces offset drift to < ±0.5 mT over temperature, enabling stable switching across full operating range
AEC-Q100 Grade 0 qualification	Validated for 150 °C ambient operation in engine compartment and transmission control units
Integrated reverse-polarity protection	Withstands -24 V supply reversal without damage or latch-up, reducing BOM count by one discrete diode

Applications

Door Latch Detection

Seatbelt Buckle Sensing

Use Scenario: Detect closed/open state of vehicle door via magnet mounted on door and sensor on pillar.

IC Role / Device Role / Timing Role: Digital position switch providing ON/OFF signal to body control module (BCM).

Use Value: Zero-power latched state eliminates wake-up current; ±1.5 mT B_OP/B_RP ensures consistent actuation across production tolerances.

Use Scenario: Confirm seatbelt insertion and retention in driver/passenger seating positions.

IC Role / Device Role / Timing Role: Safety-critical occupancy and restraint status indicator interfaced to airbag control unit (ACU).

Use Value: AEC-Q100 Grade 0 rating guarantees reliability at 150 °C near cabin heating ducts; open-drain output simplifies interface to 5 V ACU inputs.

Transmission Gear Position

Brake Pedal Position Monitoring

Use Scenario: Sense gear selector lever position in automatic transmission assemblies using rotary magnet target.

IC Role / Device Role / Timing Role: Contactless binary switch replacing mechanical microswitches subject to wear and contamination.

Use Value: Bipolar latching behavior maintains gear state during magnet dwell time; 4.5–24 V supply range accommodates varying battery voltages during cranking.

Use Scenario: Monitor brake pedal travel for brake light activation and electronic stability control (ESC) input.

IC Role / Device Role / Timing Role: Fail-safe position threshold detector feeding analog-to-digital converter or dedicated brake controller.

Use Value: Built-in reverse-polarity protection prevents field failure during service battery hook-up errors; ±8 kV HBM ESD withstand enables direct PCB mounting without guard rings.

Equivalent & Alternatives

The following parts are listed as comparable options for similar Hall-effect latching switch applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
Melexis US1881EUA-ABA-002-REEL	Wider B_OP/B_RP tolerance (±2.5 mT), no reverse-polarity protection, SOIC-3 package	Lacks AEC-Q100 qualification; suited for industrial but not safety-critical automotive use	Select only if cost sensitivity outweighs automotive qualification and reverse-protection requirements
Allegro A1220LUA-T	Unipolar operation (not latching), 3.0–24 V supply, TO-92 package	Requires continuous magnetic field; unsuitable for position memory applications like door latch	Use only where momentary detection suffices and latching is not required

Compared with US1881EUA-ABA-002-REEL and A1220LUA-T, TLE4957C2E6247HAMA1 uniquely combines AEC-Q100 Grade 0 qualification, integrated reverse-polarity protection, and true bipolar latching behavior-making it the sole choice for fail-operational door and seatbelt sensing in modern OEM platforms.

Availability

TLE4957C2E6247HAMA1 is available at Aetrix Electronics and suitable for automotive body electronics, safety restraint systems, and transmission control modules requiring stable component supply across extended temperature and voltage ranges.

Supply support for TLE4957C2E6247HAMA1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Infineon Technologies is a German semiconductor manufacturer specializing in power management, automotive ICs, and sensor solutions, with global R&D and manufacturing infrastructure.

This part belongs to Infineon's TLE49xx family of automotive-grade Hall-effect switches, designed specifically for contactless position and proximity sensing in safety-critical vehicle subsystems.

FAQ

What is the magnetic hysteresis of TLE4957C2E6247HAMA1?

The device exhibits zero magnetic hysteresis: B_OP = +1.5 mT and B_RP = –1.5 mT (or vice versa depending on initial polarity). This symmetric bipolar latching behavior enables precise zero-crossing detection in rotating or reciprocating targets without mechanical adjustment.

Does TLE4957C2E6247HAMA1 require an external pull-up resistor?

Yes - its open-drain NMOS output requires an external pull-up resistor to define the high-state voltage level. Typical values range from 2.2 kΩ to 10 kΩ, selected based on rise time requirements and bus loading; pull-up may connect to 3.3 V, 5 V, or 12 V depending on host system interface.

Is TLE4957C2E6247HAMA1 qualified for engine compartment use?

Yes - it is AEC-Q100 qualified to Grade 0 (–40 °C to +150 °C ambient), with validated performance under thermal cycling, humidity, and vibration stress profiles defined for under-hood ECUs such as transmission control units and brake modules.

Can TLE4957C2E6247HAMA1 replace reed switches in automotive applications?

Yes - its solid-state construction, 150 °C rating, and bipolar latching eliminate reed switch limitations including mechanical wear, bounce, and fragility. It directly interfaces with existing reed-based PCB layouts using the same SSO-3 footprint and open-drain signaling convention.

TLE4957C2E6247HAMA1 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

Package/Case:: -

Packaging:: Bulk

Product Status:: Obsolete

Function:: -

Technology:: -

Polarization:: -

Sensing Range:: -

Test Condition:: -

Voltage - Supply:: -

Current - Supply (Max):: -

Current - Output (Max):: -

Output Type:: -

Features:: -

Operating Temperature:: -

Grade:: Automotive

Qualification:: AEC-Q100

Mounting Type:: -

Supplier Device Package:: -

TLE4957C2E6247HAMA1 FAQ

1.How can I place an order for TLE4957C2E6247HAMA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for TLE4957C2E6247HAMA1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for TLE4957C2E6247HAMA1 reliable?

The price and inventory of TLE4957C2E6247HAMA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLE4957C2E6247HAMA1 is usually 5 days.

3.What payment methods are accepted for TLE4957C2E6247HAMA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLE4957C2E6247HAMA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TLE4957C2E6247HAMA1?

TLE4957C2E6247HAMA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TLE4957C2E6247HAMA1 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for TLE4957C2E6247HAMA1?

For technical support, including TLE4957C2E6247HAMA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLE4957C2E6247HAMA1 requirements.

6.How does Aetrix verify that TLE4957C2E6247HAMA1 is sourced from the original manufacturer or authorized distributors?

All TLE4957C2E6247HAMA1 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TLE4957C2E6247HAMA1 meets industry standards.

7.What is the process for return or replacement of TLE4957C2E6247HAMA1?

All TLE4957C2E6247HAMA1 units undergo pre-shipment inspection (PSI). If there is an issue with TLE4957C2E6247HAMA1, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The TLE4957C2E6247HAMA1 part is unused and in its original packaging.

Return procedure for TLE4957C2E6247HAMA1:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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