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BD679 The BD679 is an NPN Darlington transistor from STMicroelectronics, rated for 80V collector-emitter voltage and 4A collector current. It comes in a SOT-32-3 through-hole package with 40W power dissipation.
Mfr Part #:

BD679

Available from 4 distributors
Mfr Name: STMicroelectronics
STMicroelectronics
The BD679 is an NPN Darlington transistor from STMicroelectronics, rated for 80V collector-emitter voltage and 4A collector current. It comes in a SOT-32-3 through-hole package with 40W power dissipation.
✓ Total Stock: 14,917 pcs
$ Price Range: $0.38 - $1.61

BD679 Available from 4 distributors

✓ Authorised
✓ Non-Authorised
DistyParts aggregates offers from multiple distributors. Final prices, lead times and terms are subject to the distributors' discretion and may change without prior notice. DistyParts is not liable for any discrepancies.

BD679 Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Current
DC Current Gain (hFE) (Min) @ Ic, Vce
Mounting Type
Operating Temperature
Power
Supplier Device Package
Transistor Type
Vce Saturation (Max) @ Ib, Ic
Voltage
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BD679 Description

Short technical summary and product information.

The BD679 is an NPN Darlington transistor manufactured by STMicroelectronics. It is designed for general-purpose switching and amplification applications requiring high current gain. The device features a collector-emitter voltage rating of 80V and a continuous collector current of 4A.

 

With a minimum DC current gain (hFE) of 750 at 1.5A collector current and 3V collector-emitter voltage, the BD679 provides high current amplification. The collector-emitter saturation voltage is typically 2.5V at 30mA base current and 1.5A collector current. Power dissipation is rated at 40W, and the device can operate at junction temperatures up to 150°C.

 

The transistor is housed in a TO-225AA / TO-126-3 package, also known as SOT-32-3, with through-hole mounting. This package is suitable for PCB mounting and provides adequate thermal performance for the rated power dissipation.

BD679 Quick Information

Product Type: NPN Darlington Transistor
Canonical Name: BD679 NPN Darlington Transistor
Subcategory: Darlington Transistor

BD679 Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected

BD679 Estimated Pricing

Qty Low High
1+ $1.61 $1.61
50+ $0.76 $0.76
100+ $0.68 $0.68
500+ $0.53 $0.53
1,000+ $0.48 $0.48
2,000+ $0.45 $0.45
5,000+ $0.40 $0.40
10,000+ $0.38 $0.38

Estimated market price range - modelled values for guidance only, not live distributor offers.

BD679 Features

  • NPN Darlington transistor for high current gain.
  • Rated for 80V collector-emitter voltage.
  • Supports 4A continuous collector current.
  • Minimum DC current gain of 750.
  • 40W power dissipation capability.

BD679 Applications

  • Used in general-purpose switching circuits.
  • Suitable for high-gain amplifier stages.
  • Ideal for motor and relay driver applications.
  • Applicable in power management and control.

BD679 FAQs

7 frequently asked questions generated from this part’s specifications.
What is the collector-emitter voltage rating of the BD679?

80V.

What is the maximum collector current?

4A.

What is the DC current gain (hFE) of the BD679?

Minimum 750 at 1.5A collector current and 3V collector-emitter voltage.

What is the collector-emitter saturation voltage?

Maximum 2.5V at 30mA base current and 1.5A collector current.

What is the power dissipation of the BD679?

40W.

What is the operating junction temperature range?

Up to 150°C.

What package does the BD679 come in?

TO-225AA / TO-126-3 (SOT-32-3) through-hole package.

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