Now it is not probable that the wheels will completely stall whilst still on the track under DCC power, but if they did, it would probably fry the R8215 decoder as it only has a 1 amp surge allowance.The 81201 can handle 1.5 amp. The A4 model draws 0.15 amp when rolling by itself; 0.25 amp when held stationary at the buffers, but with wheels freely turning on the track; and 1.3 amp with the motor stalled (wheels not moving at all - with current applied to the motor).