BTS737S3 is a smart high-side power switch from Infineon that supports 4 parallel channels and has a very low standby current. It can provide diagnostic feedback for 12V and 24V grounded loads and is suitable for all types of resistive and capacitive loads, especially those with high inrush currents, such as lamps.
The BTS737S3 is a smart high‑side power switch built in Infineon's Smart SIPMOS® technology. It offers four parallel channels, each with an on‑state resistance of 35 mΩ, and includes advanced current‑sense and diagnostic feedback. Typical applications include microcontroller‑compatible high‑side switching for 12 V and 24 V grounded loads, resistive or capacitive loads, and replacement of electromechanical relays.
Key features include very low standby current, built‑in overload, short‑circuit, overvoltage, reverse‑battery and electrostatic discharge protection, as well as a proportional load‑current sense output. The device operates from 5.0 V to 40 V, supports up to 40 A current limitation, and is supplied in a 28‑lead T‑DSO package.
| On‑state resistance (Ron) | 35 mΩ |
|---|---|
| Nominal load current (single channel) | 5.4 A |
| Current limitation | 40 A |
| Package type | P‑DSO‑28‑16 |
| Ordering code | BTS737S3 |
It provides four independent high‑side channels.
Each channel has an on‑state resistance of 35 mΩ.