0.5 Watt 4.7v Zener Diodes – Bargain Pack of 100pcs :
Zener diodes can be connected in series to create a higher denomination composite Zener :
for example two 4.7v Zeners connected in series will have the total of 9.4v voltage limiting function.
Also they can be stacked in parallel to increase their maximum Current capability and Wattage :
eg: 10pcs of the 4.7v 0.5Watt Zeners connected in parallel will make a 4.7v composite zener capable of handling up to 5 Watt in total.