The M55342X12 from Vishay is a Space Qualified Resistor with Resistance 10 Ohms to 261 KOhms, Power Rating 100 W, Voltage 50 V, Tolerance ±0.1 %, ±0.25 %, ±0.5 %, ±1 %, ±2 %, 5 %, ±10 %, Operating Temperature -65 to 150 Degree C. Tags: Surface Mount, Chip. More details for M55342X12 can be seen below.