Thick film power resistor offers enhanced protection against short transient pulses

Vishay Intertechnology, Inc. has extended its LTO series of thick film power resistors with a new AEC-Q200-qualified device that provides higher pulse absorption up to 75J/0.1 s. Supplied in a clip-mount TO-247 package for direct mounting on a heatsink, the Vishay Sfernice LTO 150H offers high power dissipation of 150W at a +45C case temperature.

The device features a unique design that provides 30% higher energy absorption than existing LTO series devices for improved protection against short transient pulses. This results in more stable operation in high-stress environments, lowering the risk of failure and enhancing overall system reliability. The LTO 150H's high power dissipation and low thermal resistance of 0.87C/W further improve its ability to provide consistent performance and safeguard sensitive components while allowing fewer devices to be used – saving board space, simplifying layouts, and lowering overall solution costs.

The LTO 150H offers high-temperature operation to +175C, a wide range of resistance values from 1-Ohm to 2.2kOhm, and tolerances down to ±2%. The device will act as the precharge or discharge resistor for controls, 48V board nets, BMS, fuel cells, and onboard chargers for HEVs, EVs, and low-speed EVs; energy monitoring and metering systems; agricultural vehicles and farm equipment; industrial motor drives, welding equipment, and power tools; switches, routers, and optical network equipment; and weapons guidance systems.

The RoHS-compliant resistor provides a non-inductive design and is offered with bended termination options.