ST4044 Specs and Replacement
Type Designator: ST4044
Material of Transistor: Si
Polarity: NPN
Absolute Maximum Ratings
Maximum Collector Power Dissipation (Pc): 5 W
Maximum Collector-Base Voltage |Vcb|: 60 V
Maximum Collector-Emitter Voltage |Vce|: 60 V
Maximum Emitter-Base Voltage |Veb|: 6 V
Maximum Collector Current |Ic max|: 0.8 A
Max. Operating Junction Temperature (Tj): 200 °C
Electrical Characteristics
Transition Frequency (ft): 4 MHz
Collector Capacitance (Cc): 120 pF
Forward Current Transfer Ratio (hFE), MIN: 40
Package: TO5
ST4044 Substitution
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ST4044 datasheet
u401 sst404 u404 sst406 u406.pdf 
SST/U401 Series Vishay Siliconix Monolithic N-Channel JFET Duals SST404 U401 U406 SST406 U404 PRODUCT SUMMARY Part Number VGS(off) (V) V(BR)GSS Min (V) gfs Min (mS) IG Typ (pA) jVGS1 VGS2j Max (mV) U401 0.5 to 2.5 40 1 2 5 SST/U404 0.5 to 2.5 40 1 2 15 SST/U406 0.5 to 2.5 40 1 2 40 FEATURES BENEFITS APPLICATIONS D Monolithic Design D Tight Diff... See More ⇒
N-Channel JFET Monolithic Dual LLC SST404 / SST405 / SST406 FEATURES DESCRIPTION n Very Low Noise . . . . . . . . . . . . . e ... See More ⇒
WST4041 P-Ch MOSFET Product Summery General Description The WST4041 is the highest performance trench BVDSS RDSON ID P-ch MOSFET with extreme high cell density , which provide excellent RDSON and gate charge -40V 30m -6A for most of the synchronous buck converter applications . Applications The WST4041 meet the RoHS and Green Product High Frequency Point-of-Load Synch... See More ⇒
WST4045 P-Ch MOSFET Product Summery General Description The WST4045 is the highest performance trench BVDSS RDSON ID P-ch MOSFET with extreme high cell density , which provide excellent RDSON and gate -40V 73m -4.3A charge for most of the synchronous buck converter applications . Applications The WST4045 meet the RoHS and Green High Frequency Point-of-Load Synchronous... See More ⇒
Detailed specifications: ST32, ST33, ST34, ST3904, ST3906, ST40, ST400, ST401, 2SC2073, ST4045, ST4080, ST4081, ST41, ST410, ST411, ST414, ST4150
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