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| Part Number | KST5401MTF | KST4401MTF | 
|---|---|---|
| Manufacturer | onsemi | onsemi | 
| Product Status | Obsolete | Active | 
| Transistor Type | PNP | NPN | 
| Current - Collector (Ic) (Max) | 500 mA | 600 mA | 
| Voltage - Collector Emitter Breakdown (Max) | 150 V | 40 V | 
| Vce Saturation (Max) @ Ib, Ic | 500mV @ 5mA, 50mA | 750mV @ 50mA, 500mA | 
| Current - Collector Cutoff (Max) | 50nA (ICBO) | 100nA | 
| DC Current Gain (hFE) (Min) @ Ic, Vce | 60 @ 50mA, 5V | 100 @ 150mA, 1V | 
| Power - Max | 350 mW | 350 mW | 
| Frequency - Transition | 300MHz | 250MHz | 
| Operating Temperature | - | - | 
| Mounting Type | Surface Mount | Surface Mount | 
| Package / Case | TO-236-3, SC-59, SOT-23-3 | TO-236-3, SC-59, SOT-23-3 | 
| Supplier Device Package | SOT-23-3 | SOT-23-3 |