BTS 441 R is a high side power switch from Infineon with 20mΩ status feedback. It is suitable for 5V, 12V and 24V DC applications, and can meet the needs of various resistive, inductive and capacitive loads. It is especially suitable for loads with high inrush currents, such as lamps. The product integrates short circuit protection, current limiting, overload protection, thermal shutdown, overvoltage protection (including load dump), reverse battery protection, ground and Vbb loss protection, electrostatic discharge (ESD) protection, diagnostic feedback, open load detection and thermal shutdown feedback.
The BTS441R is a smart high‑side power switch with a single channel, offering low on‑state resistance (20 mΩ) and integrated protection functions such as short‑circuit, overload, thermal shutdown, over‑voltage, reverse‑battery and ESD protection. It is designed for uC‑compatible power switching in 5 V, 12 V and 24 V DC applications, handling resistive, inductive and capacitive loads, including those with high inrush currents.
The datasheet provides detailed electrical characteristics, maximum ratings, pin definitions, diagnostic features, and package information for both TO‑263‑5‑2 (SMD) and TO‑220‑5‑12 (through‑hole) versions. Ordering codes BIS441RG (SMD) and BIS441RS (through‑hole) are listed, along with mechanical dimensions and typical application notes.
| On‑state resistance (RON) | 20 mΩ |
|---|---|
| Nominal load current (IL) | 21 A |
| Current limitation | 65 A |
| Supply voltage (over‑voltage protection) | 43 V |
| Power dissipation (DC) | 125 W |
| Input turn‑on threshold voltage | 1.2 – 2.2 V |
| ESD capability | 1.0 kV (HBM) |
The on‑state resistance is 20 mΩ.
The device can tolerate up to 43 V for over‑voltage protection.