hi, i'm working on a timer circuit to control a water pump.I used a BT139 as pump control switch.my problem is triac heats to very high tempreture.i guess its because i use it with its ful capacity.i dont have enough space to connect a heat sink as the circuit is tightly fitted into the box.i was wandering if i connect 2 or more BT139 triacs parallely can i reduce the heat?(is it possible to connect triacs parallely and oparate them with single MOC3023?) I checked for 40amp triac(BTA40) and its really really expensive.