Siemens HITFET BTS 949 Data Sheet
Summary
This smart lowside power switch is designed for robust switching in 12V and 24V DC applications, serving as a reliable replacement for complex electromechanical relays. Featuring integrated protections—including overvoltage, overload, short circuit, and thermal shutdown—it efficiently manages resistive, inductive, and capacitive loads. This manual provides comprehensive technical specifications and electrical characteristics, making it an essential guide for power electronics engineers designing high-reliability, DC motor control or load management systems.
Page 1 Text Content
HITFETBTS 949
Smart Lowside Power Switch Features Product Summary • Logic Level Input Drain source voltage V60VDS • Input Protection (ESD) On-state resistance RDS(on) mΩ • Thermal Shutdown ID(lim) 9.5 ACurrent limit • Overload protection Nominal load current AID(ISO) • Short circuit protection Clamping energy m JEAS • Overvoltage protection • Current limitation • Maximum current adjustable with external resistor • Current sense • Status feedback with external input resistor • Analog driving possible
Application • All kinds of resistive, inductive and capacitive loads in switching or linear applications • µC compatible power switch for 12 V and 24 V DC applications • Replaces electromechanical relays and discrete circuits
General Description N channel vertical power FET in Smart SIPMOS chip on chip tech- nology. Fully protected by embedded protected functions.
Drain
Overvoltage
dv/dt Current
protection
IN limitation limitation
Over-
Overload
ESD temperature Short circuit
protection
protection protection
Source
HITFET
02.12.1998Semiconductor Group
Page Summary Contents For Siemens HITFET BTS 949 Data Sheet
Manual Details
| Brand | Siemens |
|---|---|
| Pages | 11 |
| File Size | 192.40 KB |
| Published | May 31, 2026 |
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Frequently Asked Questions
What types of loads can this switch be used with?
It handles resistive, inductive, and capacitive loads in both switching or linear applications.
How is current monitored and limited?
The device supports external input resistors for status feedback and allows the maximum current to be adjusted externally.
What protections are integrated into the BTS 949?
It features Overvoltage, Overload, Short circuit, ESD, and Thermal Shutdown protection.
What is the recommended operating temperature range?
The device maintains functionality at an operating temperature (Tj) between -40°C and +150°C.