MO/MOS - Metal Oxide Resistors

KOA Speer
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Metal oxide MO and reduced size metal oxide MOS power type leaded resistors are designed with a flame retardant coating over a metal oxide film deposited on a ceramic core. The MO power type is offered in a 1/2W, 1W, 2W and 3W power rating, with a Min. Dielectric Withstanding Voltage of 400V and 500V. Resistance range is 0.1W ~ 150kW, in +2% and +5% tolerances. MOS series (reduced size) resistors offer standard tolerances of ±1%, ±2%, and ±5%; a T.C.R. of ±300; and a resistance range of 0.1Ω ~ 100kΩ. They are available in 1/2 ~ 5 Watt applications.

KOA Speer’s MO and MOS metal oxide power type resistor are utilized for both general (voltage divider, RC timing circuits, and pull-up/pull-down resistors) and surge (RC snubber circuits, current limiting, overload ground line) applications in the automotive, industrial and consumer industries.


  • Power rating of 1/2W, 1W, 2W, 3W and 5 Watt
  • Replace carbon composition components in some applications
  • Ideal for pulse power applications
  • Small size power type resistors offering


  • Automotive
  • Telecommunications
  • Computer
  • Instrumentation