BUT92 The BUT92 is a fast-switching NPN power transistor from STMicroelectronics in a TO-3 package. It features a 250V collector-emitter voltage, 50A collector current, and 250W power dissipation.
Mfr Part #:

BUT92

Available from 2 distributors
Mfr Name: STMicroelectronics
STMicroelectronics
The BUT92 is a fast-switching NPN power transistor from STMicroelectronics in a TO-3 package. It features a 250V collector-emitter voltage, 50A collector current, and 250W power dissipation.
Total Stock: 2,338 pcs
$ Price Range: $8.70

BUT92 Available from 2 distributors

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Non-Authorised
Distributor Stock Pricing MOQ PKG Lead Time Date Code On Order Quantity On Order Delivery
Non-Authorised Inventory information
2,336 pcs
2336 pcs On Request 1 On Request On Request On Request On Request On Request
Non-Authorised Inventory information
2 pcs
2 pcs On Request 1 On Request On Request On Request On Request On Request

BUT92 Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Base Current (IB)
Collector-Emitter Dynamic Voltage (VCE(3µs))
Collector-Emitter Dynamic Voltage (VCE(5µs))
Collector-Emitter Voltage (VCEV)
Crossover Time (tc)
Current
DC Current Gain (hFE)
Emitter-Base Voltage (VEBO)
Fall Time (tf)
Maximum Collector-Emitter Voltage without Snubber (VCEW)
Mounting Type
Operating Temperature
Power
Rate of Rise of On-State Collector Current (diC/dt)
Storage Temperature
Storage Time (ts)
Supplier Device Package
Termination Style
Thermal Resistance Junction-Case (Rthj-case)
Transistor Type
Vbe Sat (Minimum/Maximum @ IC = 35 A, IB = 3.5 A, Tc = 100 °C)
Vbe Sat (Minimum/Maximum @ IC = 35 A, IB = 3.5 A, Tc = 25 °C)
Vce Sat (Minimum/Maximum @ IC = 35 A, IB = 3.5 A, Tc = 100 °C)
Vce Saturation (Max) @ Ib, Ic
Voltage

BUT92 Description

Short technical summary and product information.

The BUT92 is a multiepitaxial planar NPN power transistor manufactured by STMicroelectronics, housed in a TO-3 package. It is designed for high-frequency and high-efficiency converters, switching regulators, and motor control applications. The device offers a collector-emitter voltage (VCEO) of 250V, a collector-emitter voltage with base-emitter reverse bias (VCEV) of 350V, and a collector current rating of 50A.

 

Key electrical characteristics include a DC current gain (hFE) greater than 10 at IC = 35A, a low collector-emitter saturation voltage of 1.2V maximum at IC = 35A and IB = 3.5A, and fast switching performance with typical storage time of 3µs and fall time of 0.4µs. The transistor can dissipate up to 250W at a case temperature of 25°C and operates at junction temperatures up to 200°C.

 

The device is mounted using through-hole technology with a screw termination style, suitable for TO-3 socket or direct chassis mounting. Its rectangular safe operating area and wide accidental overload area make it robust for demanding power switching applications.

BUT92 Quick Information

Product Type: Bipolar Junction Transistor (BJT)
Canonical Name: NPN Bipolar Junction Transistor
Subcategory: Single BJT

BUT92 Compliance

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

BUT92 Estimated Pricing

Qty Low High
100+ $8.70 $8.70

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

BUT92 Features

  • NPN fast-switching power transistor in TO-3 package.
  • 250V collector-emitter voltage with 50A collector current.
  • Low saturation voltage of 1.2V maximum at 35A.
  • 250W power dissipation at 25°C case temperature.
  • Fast switching with 3µs typical storage time.

BUT92 Applications

  • Used in uninterruptible power supply circuits.
  • Ideal for switch mode power supply designs.
  • Suitable for motor control applications.
  • Works in high-frequency power converters.

BUT92 FAQs

7 frequently asked questions generated from this part’s specifications.
What is the collector-emitter voltage rating of the BUT92?

The collector-emitter voltage (VCEO) is 250V, and the collector-emitter voltage with base-emitter reverse bias (VCEV) is 350V.

What is the maximum collector current of the BUT92?

The maximum collector current (IC) is 50A, with a base current (IB) of 10A.

What is the power dissipation rating of the BUT92?

The total power dissipation is 250W at a case temperature of 25°C.

What package is the BUT92 available in?

The BUT92 is available in a TO-204AA (TO-3) through-hole package with screw termination.

What is the operating junction temperature range of the BUT92?

The maximum junction temperature is 200°C, with a storage temperature range of -65°C to 200°C.

What is the DC current gain of the BUT92?

The DC current gain (hFE) is greater than 10 at a collector current of 35A.

Is the BUT92 RoHS compliant?

The BUT92 is marked as RoHS3 compliant, but this is unverified and should be confirmed with the manufacturer or distributor.

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