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| Part Number | BD437 | BD437S | BD438 | BD437G | BD537 | BD437T | BD439 | BD434 | BD435 | BD436 |
|---|---|---|---|---|---|---|---|---|---|---|
| Manufacturer | STMicroelectronics | Fairchild Semiconductor | STMicroelectronics | onsemi | STMicroelectronics | onsemi | onsemi | STMicroelectronics | onsemi | STMicroelectronics |
| Product Status | Not For New Designs | Active | Active | Active | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete |
| Transistor Type | NPN | NPN | PNP | NPN | NPN | NPN | NPN | PNP | NPN | PNP |
| Current - Collector (Ic) (Max) | 4 A | 4 A | 4 A | 4 A | 8 A | 4 A | 4 A | 4 A | 4 A | 4 A |
| Voltage - Collector Emitter Breakdown (Max) | 45 V | 45 V | 45 V | 45 V | 80 V | 45 V | 60 V | 22 V | 32 V | 32 V |
| Vce Saturation (Max) @ Ib, Ic | 600mV @ 200mA, 2A | 600mV @ 200mA, 2A | 600mV @ 200mA, 2A | 800mV @ 300mA, 3A | 800mV @ 600mA, 6A | 800mV @ 300mA, 3A | 800mV @ 300mA, 3A | 500mV @ 200mA, 2A | 500mV @ 200mA, 2A | 500mV @ 200mA, 2A |
| Current - Collector Cutoff (Max) | 100µA | 100µA | 100µA | 100µA (ICBO) | 100µA | 100µA (ICBO) | 100µA (ICBO) | 100µA | 100µA (ICBO) | 100µA |
| DC Current Gain (hFE) (Min) @ Ic, Vce | 30 @ 10mA, 5V | 30 @ 10mA, 5V | 30 @ 10mA, 5V | 85 @ 500mA, 1V | 15 @ 2A, 2V | 85 @ 500mA, 1V | 40 @ 500mA, 1V | 40 @ 10mA, 5V | 85 @ 500mA, 1V | 40 @ 10mA, 5V |
| Power - Max | 36 W | 36 W | 36 W | 36 W | 50 W | 36 W | 36 W | 36 W | 36 W | 36 W |
| Frequency - Transition | 3MHz | 3MHz | 3MHz | 3MHz | - | 3MHz | 3MHz | 3MHz | 3MHz | 3MHz |
| Operating Temperature | 150°C (TJ) | 150°C (TJ) | 150°C (TJ) | -55°C ~ 150°C (TJ) | 150°C (TJ) | -55°C ~ 150°C (TJ) | -55°C ~ 150°C (TJ) | 150°C (TJ) | -55°C ~ 150°C (TJ) | 150°C (TJ) |
| Mounting Type | Through Hole | Through Hole | Through Hole | Through Hole | Through Hole | Through Hole | Through Hole | Through Hole | Through Hole | Through Hole |
| Package / Case | TO-225AA, TO-126-3 | TO-225AA, TO-126-3 | TO-225AA, TO-126-3 | TO-225AA, TO-126-3 | TO-220-3 | TO-225AA, TO-126-3 | TO-225AA, TO-126-3 | TO-225AA, TO-126-3 | TO-225AA, TO-126-3 | TO-225AA, TO-126-3 |
| Supplier Device Package | SOT-32-3 | TO-126-3 | SOT-32-3 | TO-126 | TO-220 | TO-126 | TO-126 | SOT-32-3 | TO-126 | SOT-32-3 |
