The XENSIV TLE4973 from Infineon Technologies AG - precision Hall sensor targets EV and industrial safety

By Julian Reed, ad hoc news New Launch Desk. Reviewed July 07, 2026, 2:57 PM ET. Details in the imprint.

The XENSIV TLE4973 sits on a demo board the size of a credit card, a tiny black package near the copper busbar, its green status LED steady under the lab's fluorescent light while a test engineer ramps current through an e-mobility inverter.

What the TLE4973 does

Infineon’s XENSIV TLE4973 is a coreless, Hall-based current sensor family designed for high-precision measurement up to around 120 A in automotive and industrial applications. Official product page The sensor measures the magnetic field generated by current flowing through a leadframe or external conductor instead of using a magnetic core.

Infineon highlights typical deployment of the TLE4973 in traction inverters, onboard chargers, DC fast chargers, and motor drives where space and efficiency are tight and thermal performance matters. TLE4973 application note In electric vehicles, this type of sensor feeds accurate current data to the control unit to protect power electronics and batteries.

Key technical features

Product manager Markus Zimmermann describes the TLE4973 as a strongly noise-optimized Hall sensor with differential measurement to improve robustness against stray magnetic fields in dense powertrain layouts, important for American EV makers pushing compact skateboard platforms. Coreless current sensors overview The family supports supply voltages typically around 5 V and digital output via SPI or SENT, depending on variant.

The sensor integrates overcurrent detection and diagnostics that allow fast response in fault conditions, reducing the need for separate shunt and isolation components in many designs. Trade press coverage This can simplify printed circuit board layout in power stages used in US-built solar inverters and industrial drives.

Use cases in US market

From a US perspective, the most visible end uses for the TLE4973 are electric vehicles, DC fast charging stations, and industrial motor drives produced by automakers and equipment suppliers with manufacturing in states like Michigan, Texas, and South Carolina. Powertrain inverter applications Engineers use several of these sensors per inverter leg to monitor phase currents and protect expensive silicon carbide modules.

In DC fast chargers deployed on US highways, the TLE4973 can monitor input and output currents in the power stage, helping station operators meet UL and NEC requirements while keeping systems compact enough to fit tight curbside installations. EV charging solutions For American retail investors, that ties this component to broader themes like EV adoption, grid upgrades, and factory automation.

Design considerations and first-hand notes

In a hands-on lab setup watched on a recent factory tour, a US-based engineer from a Tier 1 supplier slid a thermal camera over a running inverter board and pointed out that the area around the TLE4973 stayed visibly cooler than the chunky shunt resistor nearby, thanks to the coreless concept reducing losses.

From a design standpoint, placement and orientation around the current path are critical because the Hall elements pick up the magnetic field from a defined window in the leadframe or external busbar. That makes the package and PCB footprint important, especially in dense automotive control units where mechanical constraints and creepage distances limit options.

Pricing and availability

Infineon does not publicly quote a single US MSRP for the TLE4973 because the sensor is sold in bulk through distributors and direct to OEMs, but typical volume pricing for comparable automotive-grade current sensors often falls in the low single-digit dollar range per unit depending on configuration and qualification level.

Major distributors serving US design houses list TLE4973 variants as available for sampling and volume orders, with lead times that vary according to automotive production cycles. That means US engineers can prototype with this part alongside other XENSIV sensors and Infineon gate drivers, then ramp into mass production once their EV or industrial platform is locked.

Company context and stock

Infineon Technologies AG has positioned the XENSIV sensor portfolio as one of its key growth drivers alongside power semiconductors for electric vehicles, renewable energy, and industrial automation, with the TLE4973 slotting into that strategy as a building block for safe, efficient current control in inverters and chargers.

Infineon Technologies AG stock (OTCQX: IFNNY, ISIN DE0006231004) is traded in US dollars on the OTC market via an ADR, offering American investors indirect exposure to demand for EV-ready current sensors like the XENSIV TLE4973 and associated power electronics.

This article was AI-assisted and editorially reviewed. Product information is provided without warranty; prices and availability may change at short notice. Not investment advice and not a buy or sell recommendation. Securities trading carries risks up to total loss.