Rated for high-temperature stability (hence the "hot" designation in many search queries). Why the "Hot" Status?
Since original NEC B58944 parts are increasingly rare, you may need a modern equivalent. Look for transistors with matching or exceeding: Vceo should be equal or higher. Current: Ic should be equal or higher. nec b58944 datasheet hot
When you locate the PDF, focus on these critical parameters to ensure your circuit remains stable: 1. Safe Operating Area (SOA) nec b58944 datasheet hot