LPS0300HR560JB - 

LPS300 Series 300 W Thick Film Power Resistor
LPS300 series 300 W thick film power resistors for mounting onto a heatsink. These LPS300 power resistors have a rating of 300 W at 85°C bottom case temperature, a low thermal radiation of the case and offer a wide resistance range from 0.3 to 900 kΩ.