The BTS 441 T is a Smart Highside Power Switch from Infineon Technologies. It has a 20mΩ on-state resistance and can be used in 5V, 12V and 24V DC applications. It supports CMOS compatible input and has embedded protection functions, such as short circuit protection, current limitation, overload protection, thermal shutdown, overvoltage protection, reverse battery protection, loss of ground protection and electrostatic discharge (ESD) protection.
The BTS441T is a smart high‑side power switch featuring a single N‑channel vertical power FET with an integrated charge pump and CMOS‑compatible input. It provides embedded protection functions such as short‑circuit, current‑limit, overload, thermal shutdown, over‑voltage, reverse‑battery and ESD protection, making it suitable for a wide range of resistive, inductive and capacitive loads, including lamps with high inrush currents.
The datasheet details pin definitions, maximum ratings, electrical characteristics, input thresholds, timing diagrams, and package information. It also specifies recommended external components, such as a 150 Ω resistor for GND when operating above VBB, and provides ordering codes for both standard and straight‑lead TO‑220 packages.
| On‑state resistance (R_ON) | 20 mΩ |
|---|---|
| Operating voltage Vbb(on) | 4.75 – 41 V |
| Nominal load current | 21 A |
| Current limitation | 65 A |
| Power dissipation (DC) | 125 W |
The device is offered in a standard staggered TO‑220‑5‑11 package and a straight‑lead TO‑220‑5‑12 package.