Operating and Storage Junction Temperature Range: -55 to +150 °C
Package: TO-251
Pinout of 2SD1801-T
Here is an image showing the pin diagram of this transistor.
Classification of hFE
The 2SD1801-T transistor can have a current gain of 200 to 400. The gain of the 2SD1801 will be in the range from 100 to 560, for the 2SD1801-R it will be in the range from 100 to 200, for the 2SD1801-S it will be in the range from 140 to 280, for the 2SD1801-U it will be in the range from 280 to 560.
Marking
Sometimes the "2S" prefix is not marked on the package - the 2SD1801-T might only be marked "D1801-T".
Complementary PNP transistor
The complementary PNP transistor to the 2SD1801-T is the 2SB1201-T.
SMD Version of 2SD1801-T transistor
The 2SD1615 (SOT-89), 2SD1615-GL (SOT-89), 2SD1622 (SOT-89), 2SD1622-T (SOT-89), 2SD1623 (SOT-89), 2SD1623-T (SOT-89) and 2STR1160 (SOT-23) is the SMD version of the 2SD1801-T transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.
Replacement and Equivalent for 2SD1801-T transistor