Thick-Film Power Resistors Enhance Protection Against Transient Pulses
Vishay Intertechnology expanded its LTO series of thick-film power resistors with a new AEC-Q200-qualified device that delivers higher pulse absorption up to 75 J/0.1 s (30% higher than previous LTO devices) and power dissipation of up to 150 W. Applications include precharge or discharge resistor for controls, 48-V board nets, BMS, fuel cells, and onboard chargers for HEVs, EVs, and low-speed EVs. Other potential fits are energy monitoring and metering systems, industrial motor drives, welding equipment, and power tools.
Offered in a clip-mount TO-247 package for direct mounting on a heatsink, the LTO 150H offers not only high power dissipation, but low thermal resistance of 0.87°C/W (with 150-W power dissipation) at a +45°C case temperature. The LTO 150H series operates up to +175°C and features a broad range of resistance values from 1 Ω to 2.2 kΩ, as well as tolerances down to ±2 %.
Samples and production quantities of the LTO 150H are available now, with lead times of 10 weeks. Pricing for U.S. delivery starts at $3.53 per piece in 10,000-piece quantities. Additional information is available here.