ROHM 2SD2444K User Guide
Summary
This detailed technical datasheet covers the high-performance 2SD2444K NPN Power Transistor, designed for robust electronic switching and amplification applications. The manual provides essential information, including absolute maximum ratings, comprehensive electrical characteristics, and performance graphs detailing parameters like hFE and transition frequency (fT). It is an indispensable resource for electronics engineers and circuit designers developing reliable power management systems requiring precise transistor specifications.
Page 1 Text Content
2SD2444K
Transistors
Power Transistor (15V, 1A) 2SD2444K Features External dimensions (Unit : mm) 1) Low saturation voltage, VCE(sat) = 0.3V (Max.)
at IC / IB = 0.4A / 20m A. 2) IC = 1A 2.9 1.1
3) Complements the 2SB1590K.
Packaging specification and h FE (2) (1) 0.95 0.95
Type 2SD2444K
(1)Emitter
Package SMT3 (2)Base
Each lead has same dimensions
(3)Collector
Marking BS∗
Code T146
Basic ordering unit (pieces) ∗ Denotes h FE
Absolute maximum ratings (Ta=25°C)
Parameter Symbol Limits Unit
0. 3M in
Collector-base voltage VCBO Collector-emitter voltage VCEO Emitter-base voltage VEBO
Collector current IC A (DC)
Collector power dissipation PC 0.2
Junction temperature Tj °C Storage temperature Tstg −55 to +150 °C
Electrical characteristics (Ta=25°C)
Parameter Symbol Min. Typ. Max. Unit Conditions
Collector-base breakdown voltage BVCBO IC=50µA
Collector-emitter breakdown voltage BVCEO IC=1m A
Emitter-base breakdown voltage BVEBO IE=50µA
Collector cutoff current ICBO 0.5 µA VCB=12V
Emitter cutoff current IEBO 0.5 µA VEB=5V
Collector-emitter saturation voltage VCE(sat) 0.3 IC=400m A, IB=20m A
DC current transfer ratio h FE VCE/IC=2V/50m A−
Transition frequency f T MHz VCE=2V, IE= −50m A, f=100MHz
Output capacitance Cob p F VCB=10V, IE=0A, f=1MHz
Rev.A 1/2
Page Summary Contents For ROHM 2SD2444K User Guide
Manual Details
| Brand | ROHM |
|---|---|
| Pages | 3 |
| File Size | 68.46 KB |
| Published | June 02, 2026 |
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Frequently Asked Questions
What is the maximum collector power allowed?
The sheet does not specify a hard limit but shows parameters up to 0.2W for Collector power dissipation (Pc).
Does this transistor complement another part?
Yes, it complements the 2SB1590K.
What is the maximum temperature rating for storage?
The storage temperature range (Tstg) is from -55 to +150°C.
How low can the saturation voltage go?
The maximum collector-emitter saturation voltage, VCE(sat), is 0.3V at I_C = 400mA and I_B = 20mA.