BU931T BU931T is an NPN Darlington transistor from STMicroelectronics with 400V Vce breakdown, 10A Ic, and 125W power dissipation in a TO-220 through-hole package.
Mfr Part #:

BU931T

Available from 1 distributors
Mfr Name: STMicroelectronics
STMicroelectronics
BU931T is an NPN Darlington transistor from STMicroelectronics with 400V Vce breakdown, 10A Ic, and 125W power dissipation in a TO-220 through-hole package.
✓ Total Stock: 38 pcs
$ Price Range: $1.31

BU931T Available from 1 distributor

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✓ Non-Authorised
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38 pcs
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BU931T 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
Tape & Reel
Transistor Type
Vce Saturation (Max) @ Ib, Ic
Voltage

BU931T Description

Short technical summary and product information.

BU931T is a high-voltage NPN Darlington transistor manufactured by STMicroelectronics. It is designed for switching and amplification applications requiring high current and voltage capability. The transistor features a collector-emitter breakdown voltage of 400V and a maximum collector current of 10A.

 

With a power dissipation of 125W and a minimum DC current gain (hFE) of 300 at 5A collector current, the BU931T provides efficient current amplification. The saturation voltage is 1.8V at 250mA base current and 10A collector current, making it suitable for low-voltage drop switching.

 

The device is housed in a standard TO-220-3 package with through-hole mounting. The junction temperature range extends up to 175°C, allowing robust operation in high-temperature environments.

 

Typical applications include motor control, power supply circuits, and high-voltage switching. The Darlington configuration simplifies drive requirements by requiring low base current to switch high collector loads.

BU931T Quick Information

Product Type: Bipolar Junction Transistor (BJT) - Darlington
Canonical Name: BU931T NPN Darlington Transistor
Subcategory: Bipolar Junction Transistor (BJT) - Darlington

BU931T Compliance

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

BU931T Estimated Pricing

Qty Low High
1,000+ $1.31 $1.31

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

BU931T Features

  • NPN Darlington transistor with high current gain.
  • Collector-emitter breakdown voltage of 400V.
  • Maximum collector current rating of 10A.
  • Power dissipation up to 125W.
  • TO-220 through-hole package for easy mounting.

BU931T Applications

  • Motor control and actuator drive circuits.
  • High-voltage power supply switching.
  • Relay and solenoid driver stages.
  • Linear amplifier output stages.

BU931T FAQs

7 frequently asked questions generated from this part’s specifications.
What is the collector-emitter breakdown voltage of the BU931T?

400V.

What is the maximum collector current rating?

10A.

What is the power dissipation rating?

125W.

What is the operating temperature range?

Up to 175°C junction temperature.

What is the package type?

TO-220-3 with through-hole mounting.

What is the DC current gain (hFE)?

Minimum 300 at 5A collector current and 10V collector-emitter voltage.

Is the BU931T RoHS compliant?

RoHS status is indicated as compliant (RoHS3), but this data is unverified externally.

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