bt148w-500r transistor of datasheet pdf

BT148W-500R
Manufacturer : PHILIPS[Philips Semiconductors]
Description : Thyristors logic level

BT148W-500R
Manufacturer : Philips Semiconductors
Description : Thyristors logic level(???????????)

BT148W-500R
Manufacturer : Philips Semiconductors
Description : Thyristors logic level