This is a smart high side power switch, which has overload protection, current limitation, short circuit protection, thermal shutdown, overvoltage protection (including load dump), fast demagnetization and other functions.
This manual describes the Siemens PROFET® BTS 542 D2 smart high‑side power switch. It lists the key features such as overload, over‑voltage, short‑circuit and thermal shutdown protection, as well as CMOS diagnostic output and reverse‑battery protection. The document also explains the N‑channel vertical power FET architecture and its integrated charge‑pump technology.
Detailed sections cover pin assignments, maximum ratings, electrical characteristics, protection functions, diagnostic features, truth tables and package dimensions. The information is intended for designers and engineers integrating the device into 12 V or 24 V DC systems.
| Maximum load current (short‑circuit) | 21 A |
|---|---|
| On‑state resistance (typ) at 25 °C | 15 mΩ |
| Operating temperature range | -40 °C … +150 °C |
| Power dissipation (DC) | 167 W |
| ESD protection (HBM) | 2.0 kV |
| Input voltage range | -0.5 V … +6 V |
The device can handle a load current of up to 21 A as specified in the feature list.
The typical on‑state resistance at 25 °C is 15 mΩ.
It operates from –40 °C up to +150 °C.
Yes, it includes ESD protection rated at 2.0 kV (Human Body Model).