Operating and Storage Junction Temperature Range: -55 to +150 °C
Package: TO-251
Pinout of 2SD1801-S
Here is an image showing the pin diagram of this transistor.
Classification of hFE
The 2SD1801-S transistor can have a current gain of 140 to 280. 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-T it will be in the range from 200 to 400, 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-S might only be marked "D1801-S".
Complementary PNP transistor
The complementary PNP transistor to the 2SD1801-S is the 2SB1201-S.
SMD Version of 2SD1801-S transistor
The 2SC3444 (SOT-89), 2SD1615 (SOT-89), 2SD1615-GM (SOT-89), 2SD1622 (SOT-89), 2SD1622-S (SOT-89), 2SD1623 (SOT-89), 2SD1623-S (SOT-89), 2SD874A (SOT-89), BSP41 (SOT-223) and BSR41 (SOT-89) is the SMD version of the 2SD1801-S transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.
Replacement and Equivalent for 2SD1801-S transistor