| Part Number | MJE521 | MJE521G |
|---|---|---|
| Manufacturer | STMicroelectronics | onsemi |
| Category | Transistors - Bipolar (BJT) - Single | Transistors - Bipolar (BJT) - Single |
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| Product Status | Obsolete | Obsolete |
| Transistor Type | NPN | NPN |
| Current - Collector (Ic) (Max) | 4 A | 4 A |
| Voltage - Collector Emitter Breakdown (Max) | 40 V | 40 V |
| Vce Saturation (Max) @ Ib, Ic | - | - |
| Current - Collector Cutoff (Max) | 100µA (ICBO) | 100µA (ICBO) |
| DC Current Gain (hFE) (Min) @ Ic, Vce | 40 @ 1A, 1V | 40 @ 1A, 1V |
| Power - Max | 40 W | 40 W |
| Frequency - Transition | - | - |
| Operating Temperature | 150°C (TJ) | -65°C ~ 150°C (TJ) |
| Mounting Type | Through Hole | Through Hole |
| Package / Case | TO-225AA, TO-126-3 | TO-225AA, TO-126-3 |
| Supplier Device Package | SOT-32-3 | TO-126 |