The Infineon BTS5240GNT is a dual-channel high-side power switch in a PG-DSO-20-21 package, rated for 5.4A maximum continuous output per channel with a typical on-resistance of 21 mOhm. It switches loads from 4.5V up to 28V, making it a fit for 12V and 24V automotive and industrial systems — lamp banks, solenoid drivers, relay coils, and small motor loads.
21 mOhm Rds(on) and integrated fault protection
The 21 mOhm typical Rds(on) keeps conduction losses low at full load — at 5.4A the dissipation is under 0.6W per channel, manageable in the SO-20 wide-body package with adequate PCB copper. The built-in fault protection covers current limiting (fixed), open-load detection, over-temperature shutdown, and over-voltage clamping, so the switch handles shorted loads and inductive kickback without external clamp diodes.
Temperature grade and operating envelope
The load supply spans 4.5V to 28V, covering nominal 12V and 24V rails with margin for transients.
The BTS5240GNT carries an obsolete lifecycle status.