The PTSM-121-AT-100R0F - NT3 from Epak Electronics is a Space Qualified Resistor with Resistance 2 Ohms to 1 Kohms, Power Rating 2 to 12 W, Voltage 100 V, Tolerance ±0.5%, ±1%, ±2%, ±5%, ±10%, Operating Temperature -55 to 150 Degree C. Tags: Surface Mount. More details for PTSM-121-AT-100R0F - NT3 can be seen below.