TP142
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
VCBO Collector-Base Voltage (IE = 0) 60 80 100 V
VCEO Collector-Emitter Voltage (IB = 0) 60 80 100 V
VEBO Emitter-Base Voltage (IC = 0) 5 V
IC Collector Current 10 A
ICM Collector Peak Current 20 A
IB Base Current 0.5 A
Ptot Total Dissipation at Tcase ≤ 25 o
It is not only the running current but also the inrush or cranking or initial current which you need to address, which can be up to 10x the running current. So this MIGHT be 20A in your case.
Which is at the peak current for this TIP. Depending on the motor performance, they may work for a while but could fail in a period shorter than desireable.
Further, you are using PWM which could make matters worse in terms of the duration of start-up.