High-side switch for 12V/24V/48V loads
The Infineon BTS500851TMAATMA1 is a single-channel PROFET high-side power switch rated for 38 A continuous output with a typical on-resistance of 7.2 mOhm. It handles load voltages from 5 V to 58 V, covering 12 V, 24 V, and 48 V automotive and industrial supply rails. The N-channel output is driven by a simple On/Off logic input and includes auto-restart after a fault clears.
7.2 mOhm Rds(on) — conduction loss and thermal budget
At 38 A the 7.2 mOhm typical Rds(on) yields about 10.4 W conduction loss at 25°C junction — the actual loss climbs with temperature per the normalised curve.
Fault protection set — overcurrent, open-load, overtemperature, overvoltage
The BTS500851 integrates current limiting (fixed threshold), open-load detection, overtemperature shutdown, and overvoltage clamping. The auto-restart feature re-enables the output after the fault condition clears, which is useful for transient overloads in lamp or motor loads. The 1:1 input-to-output ratio means the logic input directly gates the power stage — no external level shifting needed.
Last Buy — secure inventory now
The BTS500851TMAATMA1 carries a Last Buy lifecycle status. This means Infineon has announced end-of-life and the final order window is open. Buyers should commit to their lifetime buy quantities now to avoid a forced redesign.