Power resistor improves automated board assembly

Bourns Inc. has developed a new power resistor specifically engineered to meet high temperature soldering requirements that enable improved automated board assembly.

Designated Bourns PWR263S-20, the new power resistor features a D2PAK surface mount package, which provides an optimal solution for space-constrained designs that have Pb-free soldering temperature requirements. The new power resistor is suitable for high-volume, high power component automated assembly and is a drop-in replacement for competitive thick-film resistive products in D2PAK packages. The new power resistor is designed to fit a broad range of applications that include industrial automation, telecommunication equipment, lighting controls, heating systems, battery chargers, inverter drives and general switch mode power supplies.

"Bourns has uniquely positioned its latest power resistor to give our customers a smaller application solution while facilitating board assembly by meeting high temperature soldering requirements compatible with Pb-free reflow conditions," said Cathal Sheehan, product marketing manager for Bourns resistive products division. "As a pioneer in the development of thick-film resistors, Bourns is utilizing this vast expertise in engineering, manufacturing and quality assurance for the development of the latest generation of power resistive products."

The PWR263S-20 power resistor features a low inductive resistive film which is suitable for high frequency circuits and provides high surge capability suitable for applications requiring resistors to discharge capacitive energy. It also has a wide resistance range of 0.5? 1 percent and 5 percent to 130k? 1 percent and 5 percent for increased stability and durability over a wide temperature range.

In addition, the resistor features 20W power at 25°C; 100PPM/°C TCR; 6.5°C/W thermal resistance; 0.1?H inductance and 10G?insulation resistance.

Bourns' new power resistor is available now and priced from $1.75 to $2.55 in 5,000-piece quantities.