| Part Number | ZTX550STOB | ZTX555STOB | 
|---|---|---|
| Manufacturer | Diodes Incorporated | Diodes Incorporated | 
| Category | Transistors - Bipolar (BJT) - Single | Transistors - Bipolar (BJT) - Single | 
|   |   | |
| Product Status | Obsolete | Obsolete | 
| Transistor Type | PNP | PNP | 
| Current - Collector (Ic) (Max) | 1 A | 1 A | 
| Voltage - Collector Emitter Breakdown (Max) | 45 V | 150 V | 
| Vce Saturation (Max) @ Ib, Ic | 250mV @ 15mA, 150mA | 300mV @ 10mA, 100mA | 
| Current - Collector Cutoff (Max) | 100nA (ICBO) | 100nA (ICBO) | 
| DC Current Gain (hFE) (Min) @ Ic, Vce | 100 @ 150mA, 10V | 50 @ 300mA, 10V | 
| Power - Max | 1 W | 1 W | 
| Frequency - Transition | 150MHz | 100MHz | 
| Operating Temperature | -55°C ~ 200°C (TJ) | -55°C ~ 200°C (TJ) | 
| Mounting Type | Through Hole | Through Hole | 
| Package / Case | E-Line-3, Formed Leads | E-Line-3, Formed Leads | 
| Supplier Device Package | E-Line (TO-92 compatible) | E-Line (TO-92 compatible) |