Infineon Technologies BTS441RG - Semicone IC Supplier

Mfr	Infineon Technologies
Product Family	Classic PROFET™ 24V
Device Type	N-Channel Vertical Power FET
Load Voltage Range	4.75 V to 43 V
Continuous Output Current	21 A (Max)
Peak Output Current	65 A (Max)
Power Dissipation	125 W (Max)
Input Voltage Range	–10 V to +16 V
On-State Resistance	15 mΩ (Typ)
Supply Current (Operating)	2 mA (typical)
Standby Current	Very low
Input Type	CMOS Compatible, Non-Inverting
Operating Temperature	–40°C to +150°C
Package	TO-263-5 (D²PAK-5)
Mounting Type	Surface Mount
Compliance	RoHS Compliant

BTS441RG Infineon Classic PROFET Smart High-Side Switch 21A 43V | PG-TO263-5
The BTS441RG from Infineon Technologies is a single-channel smart high-side power switch in Classic PROFET architecture, integrating an N-channel vertical power FET with charge pump, ground-referenced CMOS-compatible input, and diagnostic feedback in a 5-pin PG-TO263-5 green package.
Fabricated in Smart SIPMOS technology, this high-side switch delivers a nominal load current of 21A with on-state resistance of 15mΩ typical at 25°C (20mΩ max at 150°C), operating across a 4.75V to 43V supply range suitable for 12V and 24V DC automotive and industrial systems. The device embeds comprehensive protective functions including short-circuit protection with 65A current limitation, thermal shutdown at 150°C, overvoltage protection handling 60V load dump pulses, reverse battery protection, and loss-of-ground safeguard. AEC-qualified and RoHS-compliant as a green product, the BTS441RG replaces electromechanical relays, fuses, and discrete protection circuits while providing open-load detection and diagnostic status feedback through an open-drain output pin.

Application Scenarios
● Automotive Power Distribution: The BTS441RG serves as a relay and fuse replacement in automotive power distribution modules, body control modules, and power train systems, handling resistive loads (heaters, resistors), inductive loads (motors, solenoids, valves), and capacitive loads (DC-DC converter inputs) across 12V passenger vehicle and 24V truck/agricultural vehicle networks.

● High Inrush Current Applications: The 65A current limitation and thermal shutdown protection make this PROFET switch specifically suited for lamp loads, motor startups, and other high-inrush-current applications where traditional discrete solutions fail.

● Industrial and Agricultural Equipment: Beyond automotive, the device finds deployment in 24V industrial control systems, agricultural machinery, construction equipment, and off-highway vehicles requiring robust high-side switching with diagnostic feedback.

Frequently Asked Questions
Q1: What is the maximum load current of BTS441RG? The nominal load current is 21A (17A minimum per ISO 10483-1), with short-circuit current limited to 65A at 25°C junction temperature for self-protection.
Q2: Does BTS441RG require external protection components? Only an external GND resistor (150Ω typical) is needed for overvoltage and reverse battery protection; all other protective functions are integrated on-chip.

Alternative Models
1. BTS442E2: A higher-current 30A PROFEET with 30mΩ on-resistance and enhanced diagnostic features including current sense capability for load current monitoring applications.
2. BTS432E2: A 63V-rated 11A PROFET high-side switch with 38mΩ on-resistance targeting 48V automotive systems and higher-voltage industrial applications.
3. BTS50010-1LUA: A modern Power PROFET+12V generation device with 0.7mΩ on-resistance and 55A capability in an 8-pin leadless package for next-generation designs.
4. BTS436L2: An 8.8A TO-220-5 packaged PROFET with diagnostic feedback for lower-current body electronics and relay replacement applications.