BTS409L1 is a high side power switch produced by Infineon Technologies AG. It has overload protection, current limitation, short circuit protection, thermal shutdown, overvoltage protection, fast demagnetization and other features. It is applied to 12 V and 24 V DC grounded loads and can replace mechanical relays, fuses and discrete circuits.
The Infineon BTS409L1 is a smart high‑side power switch offering overload, short‑circuit, thermal shutdown, over‑voltage, and ESD protection. It is designed for 12 V and 24 V DC grounded loads and can replace electromechanical relays and fuses.
The document provides pin definitions, electrical characteristics, protection functions, input/status feedback details, truth tables, and package information for the TO‑220AB/5 version.
| Overvoltage protection (Vob) | 43 V |
|---|---|
| Operating voltage (Vbbi(on)) | 5.0‑34 V |
| On‑state resistance (RON) | 200 mΩ |
| Load current (ISO) | 23.4 A |
| Package type | TO‑220AB/5 |
| Input resistance | 2.5‑6 kΩ |
| ESD capability (Human Body Model) | 1.0 kV |
The device provides overvoltage protection up to 43 V.
The on‑state resistance is specified as 200 mΩ.
It is offered in a TO‑220AB/5 package.