This is Dual NPN Darlington Pair 100 mA 30 V HFE:100 4-Pin SOT-143 manufactured by Infineon. The manufacturer part number is BCV61BE6327HTSA1. It features up to 100 of minimum DC current gain. The transistor is a npn type. The given dimensions of the product include 2.9 x 1.3 x 0.9mm. The product is available in surface mount configuration. Provides up to 300 mw maximum power dissipation. The product has a maximum 100 ma continuous collector current . Additionally, it has 30 v maximum collector base voltage. Whereas features a 30 v of collector emitter voltage (max). In addition, the product has a maximum 900 mv base emitter saturation voltage . It has a maximum 5µa collector cut-off current . In addition, the height is 0.9mm. Furthermore, the product is 1.3mm wide. Its accurate length is 2.9mm. The package is a sort of sot-143. It consists of 2 elements per chip. The product has a maximum 600 mv collector emitter saturation voltage . It features a 6 v of maximum emitter base voltage. It has a maximum operating temperature of +150 °c. It contains 4 pins.