Traditional transistors can produce low current gains. One of STMicroelectronics" NPN 2ST501T Darlington transistors can provide you with the much higher values you need. This product"s maximum continuous DC collector current is 4 A, while its minimum DC current gain is 2000@2A@2 V. It has a maximum collector emitter saturation voltage of 1.5@2mA@2A V. This Darlington transistor array"s maximum emitter base voltage is 5 V, while its maximum base emitter saturation voltage is 2@2mA@2A V. Its maximum power dissipation is 100000 mW. In order to ensure parts aren"t damaged by bulk packaging, this product comes in tube packaging to add a little more protection by storing the loose parts in an outer tube. It has a maximum collector emitter voltage of 350 V and a maximum emitter base voltage of 5 V. This Darlington transistor array has a minimum operating temperature of -65 °C and a maximum of 150 °C.