BUT11A The BUT11A is a high voltage NPN power transistor from STMicroelectronics designed for fast-switching applications. It features a 450V collector-emitter voltage and 5A collector current in a TO-220 package.
Mfr Part #:

BUT11A

Available from 1 distributors
Mfr Name: STMicroelectronics
STMicroelectronics
The BUT11A is a high voltage NPN power transistor from STMicroelectronics designed for fast-switching applications. It features a 450V collector-emitter voltage and 5A collector current in a TO-220 package.
Total Stock: 6 pcs
$ Price Range: $0.31

BUT11A Available from 1 distributor

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BUT11A Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Base Current (IB)
Base Peak Current (Ibm)
Base-Emitter Saturation Voltage (Vbe Sat)
Collector Cut-off Current (Maximum @ Vce=rated VCES, Tc=125 °C)
Collector Cut-off Current (Maximum @ Vce=rated VCES, Tc=25 °C)
Collector Peak Current (ICM)
Collector-Emitter Sustaining Voltage (VCEO(sus))
Collector-Emitter Voltage (VCES)
Current
DC Current Gain (hFE) (Min) @ Ic, Vce
DC Current Gain (hFE) (Minimum/Typical @ Ic=5 mA, Vce=5 V)
Emitter Cut-off Current (IEBO)
Emitter-Base Voltage (VEBO)
Fall Time (tf)
Lead Pitch
Mounting Type
Number of Pins
Operating Temperature
Power
Storage Temperature
Storage Temperature Range
Storage Time (ts)
Supplier Device Package
Tape & Reel
Thermal Resistance, Junction-Case (RthJC)
Transistor Type
Turn-On Time (ton)
Vce Saturation (Max) @ Ib, Ic
Voltage

BUT11A Description

Short technical summary and product information.

The BUT11A is a silicon multiepitaxial mesa NPN transistor in a JEDEC TO-220 plastic package, intended for switching applications such as flyback and forward single transistor low power converters. This device is characterized by a high voltage capability with a collector-emitter voltage rating of 450 V (VCEO) and up to 1000 V with base shorted (VCES). The maximum continuous collector current is 5 A, with a peak current capability of 10 A. Base current is rated at 2 A continuous and 4 A peak.

 

Key electrical characteristics include a DC current gain (hFE) of 10 minimum and 35 typical at 5 mA and 0.5 A collector currents, and a collector-emitter saturation voltage of 1.5 V maximum at 2.5 A. The transistor features fast switching speeds with typical turn-on time of 1 µs, storage time of 4 µs, and fall time of 0.8 µs, making it suitable for high-frequency switching power supplies.

 

Thermal characteristics include a maximum power dissipation of 83 W at case temperature 25°C, a maximum junction temperature of 150°C, and a thermal resistance junction-to-case of 1.5 °C/W. The storage temperature range is -65 to 150°C. The device is available in a through-hole TO-220-3 package with a lead pitch of 5.1 mm, suitable for standard PCB mounting. Compliance data is available but unverified; please confirm with the manufacturer.

BUT11A Quick Information

Product Type: NPN Power Transistor
Series: BUT11A
Canonical Name: BUT11A - NPN High Voltage Fast-Switching Power Transistor
Subcategory: NPN High Voltage Fast-Switching

BUT11A Compliance

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

BUT11A Estimated Pricing

Qty Low High
3,000+ $0.31 $0.31

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

BUT11A Features

  • High voltage NPN transistor rated 450V VCEO.
  • Fast switching with 1µs turn-on time.
  • TO-220 through-hole package for easy mounting.
  • Maximum collector current of 5A.
  • Thermal resistance junction-case 1.5°C/W.

BUT11A Applications

  • Used in flyback and forward single transistor power converters.
  • Suitable for high voltage switching power supplies.
  • Ideal for low power converter applications.
  • Employed in switching circuits requiring fast switching speed.

BUT11A FAQs

7 frequently asked questions generated from this part’s specifications.
What is the collector-emitter voltage rating of the BUT11A?

The BUT11A has a maximum collector-emitter voltage of 450V (VCEO) and 1000V (VCES with base shorted).

What package is the BUT11A available in?

The BUT11A is available in a TO-220-3 through-hole package.

What is the operating junction temperature range?

The maximum junction temperature is 150°C, and the storage temperature range is -65 to 150°C.

Is the BUT11A RoHS compliant?

The BUT11A is listed as RoHS3 compliant, but this is unverified. Confirm with the manufacturer.

What is the maximum collector current?

The maximum continuous collector current is 5A, with a peak current of 10A.

What are the switching times of the BUT11A?

Typical switching times: turn-on time 1µs, storage time 4µs, fall time 0.8µs.

What is the DC current gain (hFE) of the BUT11A?

The DC current gain is 10 minimum, 35 typical at IC=5mA and IC=0.5A (VCE=5V).

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