MC1H104P21
 
HO-scale, 4-function decoder that measures 25.1 x 15.6 x 4.7mm. This decoder has a 21-pin connector arranged according to the NMRA Standard that easily plugs into the factory-installed PCB of many models. This decoder will operate in DCC only.
 
Dimensions: 25.1 x 15.6 x 4.7mm
Max. Motor Stall Current: 1A 
Max. Function Current: 100mA (each output)
Function Outputs: 4
DCC Track Voltage: 21 Volts Maximum