| Distributor | Stock | Pricing | MOQ | PKG | Lead Time | Date Code | On Order Quantity | On Order Delivery | |
|---|---|---|---|---|---|---|---|---|---|
|
56,150 pcs
|
56150 pcs | On Request | 1 | On Request | On Request | On Request | On Request | On Request | |
|
1,958 pcs
|
1958 pcs | On Request | 1 | On Request | On Request | On Request | On Request | On Request | |
|
133 pcs
|
133 pcs | On Request | 1 | On Request | On Request | On Request | On Request | On Request |
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| Manufacturer Name | |
| Current | |
| DC Current Gain (hFE) (Min) @ Ic, Vce | |
| Lead Style | |
| Mounting Type | |
| Operating Temperature | |
| Power | |
| Supplier Device Package | |
| Tape & Reel | |
| Transistor Type | |
| Vce Saturation (Max) @ Ib, Ic | |
| Voltage |
The BD678 is a PNP Darlington transistor from STMicroelectronics designed for medium-power switching and amplification applications. It features a collector-emitter voltage (VCEO) of 60V and a continuous collector current of 4A, making it suitable for driving loads in motor control, relay drivers, and power supply circuits.
With a minimum DC current gain (hFE) of 750 at 1.5A collector current and 3V VCE, the BD678 provides high current amplification. The collector-emitter saturation voltage is typically 2.5V at 30mA base current and 1.5A collector current, ensuring efficient switching with low on-state losses. The device dissipates up to 40W and has a maximum junction temperature of 150°C.
The transistor is housed in a through-hole TO-225AA / TO-126-3 package, supplied as SOT-32-3, which is compatible with standard TO-126 footprints. It is suitable for designs requiring a rugged, high-gain Darlington pair in a single package.
| Qty | Low | High |
|---|---|---|
| 1+ | $1.09 | $1.09 |
| 10+ | $0.50 | $0.50 |
| 100+ | $0.45 | $0.45 |
| 500+ | $0.35 | $0.35 |
| 1,000+ | $0.31 | $0.31 |
| 2,000+ | $0.28 | $0.28 |
| 4,000+ | $0.25 | $0.25 |
| 12,000+ | $0.24 | $0.24 |
Estimated market price range - modelled values for guidance only, not live distributor offers.
The BD678 has a collector-emitter voltage (VCEO) of 60V.
The BD678 is available in a TO-225AA, TO-126-3 package (supplier device package SOT-32-3) with through-hole mounting.
The maximum operating junction temperature is 150°C.
The BD678 is listed as RoHS3 compliant, but this status is unverified and should be confirmed.
The minimum DC current gain (hFE) is 750 at 1.5A collector current and 3V collector-emitter voltage.
The continuous collector current is 4A.
The power dissipation is 40W.