| Part Number | BD437S | BD439S |
|---|---|---|
| Manufacturer | Fairchild Semiconductor | onsemi |
| Category | Transistors - Bipolar (BJT) - Single | Transistors - Bipolar (BJT) - Single |
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| Product Status | Active | Obsolete |
| Transistor Type | NPN | NPN |
| Current - Collector (Ic) (Max) | 4 A | 4 A |
| Voltage - Collector Emitter Breakdown (Max) | 45 V | 60 V |
| Vce Saturation (Max) @ Ib, Ic | 600mV @ 200mA, 2A | 800mV @ 200mA, 2A |
| Current - Collector Cutoff (Max) | 100µA | 100µA (ICBO) |
| DC Current Gain (hFE) (Min) @ Ic, Vce | 30 @ 10mA, 5V | 20 @ 10mA, 5V |
| Power - Max | 36 W | 36 W |
| Frequency - Transition | 3MHz | 3MHz |
| Operating Temperature | 150°C (TJ) | 150°C (TJ) |
| Mounting Type | Through Hole | Through Hole |
| Package / Case | TO-225AA, TO-126-3 | TO-225AA, TO-126-3 |
| Supplier Device Package | TO-126-3 | TO-126-3 |