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Home > Products > Discrete Semiconductor Products > Transistors > Bipolar (BJT) > Single Bipolar Transistors

STMicroelectronics BUV26

Name: BUV26
Brand: STMicroelectronics
SKU: BUV26
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BUV26

Manufacturer:: STMicroelectronics

Category:: Single Bipolar Transistors

Package:: TO-220-3

Datasheet:: BUV26.pdf

Description:: TRANS NPN 90V 10A TO-220

Quantity:: RFQ Add To RFQ list

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Inventory:9,785

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Product details

Overview

BUV26 from STMicroelectronics is a medium-power NPN silicon transistor in TO-220 package, designed for high-frequency switching regulators and motor control. It delivers 14 A continuous collector current, 90 V V_CEO, 0.6 V V_CE(sat) at 6 A/0.6 A, 0.4 µs turn-on time, and 175 °C max junction temperature.

For engineers reviewing the BUV26 datasheet, BUV26 pinout, BUV26 application, or BUV26 equivalent, key selection factors include its fast switching speed (0.4 µs t_on), low saturation voltage, rugged inductive load capability (2 µs t_s at 125 °C), and thermal resistance of 1.76 °C/W junction-to-case.

Technical Context

The BUV26 employs multiepitaxial planar construction to support high-efficiency power conversion in hard-switched topologies. Its 90 V V_CEO(sus) with 0.2 A test current and 25 mH inductive load enables reliable operation in flyback and forward converter primary switches.

Designed for unclamped inductive switching, it features specified storage time (t_s) and fall time (t_f) under both resistive and inductive conditions - including 0.5 µs t_s and 0.04 µs t_f at T_c = 125 °C - confirming suitability for high-repetition-rate motor drive H-bridge legs.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	90 V - supports 48 V bus systems with margin for inductive kick and line transients
I_C	14 A continuous - enables 200–300 W motor drive or SMPS output stages without forced cooling
V_CE(sat)	0.6 V at 6 A/0.6 A - reduces conduction loss to ~3.6 W, easing thermal design
t_on	0.4 µs - allows >1 MHz switching in resonant or quasi-resonant converters
R_thj-case	1.76 °C/W - permits 85 W dissipation at T_c = 25 °C, supporting compact heatsink integration
t_s (inductive)	0.5 µs at 125 °C - ensures predictable turn-off timing in high-temp motor control environments

Pinout & Package

TO-220 package with vertical mounting orientation, metal tab electrically connected to collector, and standard 3-pin layout (Emitter–Base–Collector, left-to-right when facing printed side).

Pin/Terminal	Circuit Role	Design Meaning
Pin 1 (left)	Emitter	Low-impedance return path; bonded directly to emitter region for minimal inductance in high-di/dt switching
Pin 2 (center)	Base	Control input requiring 0.6–1.2 A drive for full saturation; sensitive to ESD per JEDEC JESD22-A114
Pin 3 (right)	Collector	High-current output node tied to metal tab; must be isolated from heatsink unless electrically referenced to system ground

Key Features

Feature	Design Value
Fast switching performance	0.4 µs t_on, 0.12 µs t_f (resistive) - minimizes overlap loss in PWM-driven half-bridges
Low V_CE(sat)	0.6 V @ 6 A - cuts conduction loss by ~40% vs. legacy 1.2 V devices at same current
Rugged inductive switching	Specified t_s/t_f up to 125 °C - enables stable operation in brushed DC motor commutation without snubbers
High junction temperature rating	175 °C T_j(max) - allows derated use in sealed enclosures or high-ambient industrial drives

Applications

Switching Regulators

DC Motor Control

Use Scenario: Primary-side switch in 100–300 W offline flyback converters with universal AC input.

IC Role / Device Role / Timing Role: Main power switch handling 50–100 kHz hard-switched duty cycles with peak currents up to 12 A.

Use Value: Low t_on/t_f and 0.6 V V_CE(sat) reduce total switching + conduction losses below 5 W at full load.

Use Scenario: High-side switch in 24–48 V brushed DC motor H-bridge drivers for industrial actuators.

IC Role / Device Role / Timing Role: Unclamped inductive switch managing 10–20 A peak motor current with bidirectional polarity reversal.

Use Value: Guaranteed t_s ≤ 2 µs at 125 °C prevents shoot-through during direction changes under thermal stress.

Induction Heating Drivers

UPS Inverter Stages

Use Scenario: Half-bridge leg in 20–50 kHz resonant tank drivers for domestic induction cooktops.

IC Role / Device Role / Timing Role: Fast-switching power transistor operating in zero-voltage switching (ZVS) mode with 15 A peak current.

Use Value: 1.76 °C/W R_thj-case enables direct-mount heatsinking to aluminum chassis, eliminating thermal interface pads.

Use Scenario: Output stage switch in 1–3 kVA line-interactive UPS inverters converting 48 V DC to 230 V AC.

IC Role / Device Role / Timing Role: Hard-switched IGBT replacement in modified sine-wave or SPWM output bridges.

Use Value: 90 V V_CEO(sus) withstands reflected transformer spikes during overload or short-circuit events.

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN power transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BUL49	Higher V_CEO = 100 V, slower t_on = 0.6 µs, higher V_CE(sat) = 0.8 V	Better for 100 V bus designs; less suitable for >100 kHz switching	Choose for higher voltage margin where switching speed is secondary
BUW13A	Lower I_C = 10 A, identical TO-220 package, V_CE(sat) = 0.7 V	Reduced thermal headroom; limited to <200 W continuous loads	Use only when lower current rating and cost are prioritized over power density

Compared with BUL49 and BUW13A, the BUV26 offers the best balance of speed, saturation voltage, and thermal capability in the 90 V class - making it optimal for space-constrained, high-efficiency motor and SMPS designs where 14 A continuous current and sub-0.5 µs timing are required.

Availability

BUV26 is available at Aetrix Electronics and suitable for switching regulators, DC motor control, induction heating drivers, and UPS inverter stages requiring stable component supply across industrial production cycles.

Supply support for BUV26 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in power, analog, MEMS, and microcontroller technologies for industrial, automotive, and consumer markets.

The BUV26 belongs to ST's high-voltage bipolar power transistor family, engineered specifically for rugged, high-frequency switching in off-line power supplies and electromechanical actuation systems.

FAQ

Is the BUV26 pin-compatible with the BU2508DX?

No. The BU2508DX uses TO-3P package with different pin order (Collector–Base–Emitter), while BUV26 uses TO-220 with Emitter–Base–Collector layout. Mechanical and thermal interfaces are incompatible; PCB redesign and driver recalibration are required for substitution.

Can the BUV26 replace a MOSFET in a 48 V motor controller?

Yes, but with trade-offs: BUV26 requires base drive current (≥1.2 A) versus gate charge, has higher conduction loss than modern Si MOSFETs, and lacks inherent body diode. It remains viable where cost, avalanche robustness, and proven reliability in legacy designs outweigh efficiency gains.

What is the maximum safe operating area (SOA) limit at 100 °C case temperature?

At T_c = 100 °C, P_tot is derated to ~45 W (linear interpolation between 65 W at 60 °C and 0 W at 175 °C). SOA is bounded by second breakdown at V_CE > 45 V and I_C > 8 A - consult Figure 5 in ST's BUV26 datasheet (Rev 3, p.3) for full SOA curves.

Does the metal tab on the TO-220 package carry electrical potential?

Yes. The metal tab is internally connected to the collector terminal. Electrical isolation from the heatsink is mandatory unless the heatsink is biased at collector potential. Use insulating shoulder washers and mica or silicone pads rated for ≥200 V dielectric strength.

BUV26 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: TO-220-3

Packaging:: Tube

Product Status:: Obsolete

Transistor Type:: NPN

Current - Collector (Ic) (Max):: 10 A

Voltage - Collector Emitter Breakdown (Max):: 90 V

Vce Saturation (Max) @ Ib, Ic:: 1.5V @ 1.2A, 12A

Current - Collector Cutoff (Max):: -

DC Current Gain (hFE) (Min) @ Ic, Vce:: -

Power - Max:: 85 W

Frequency - Transition:: -

Operating Temperature:: 175°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-220

BUV26 FAQ

1.How can I place an order for BUV26 through Aetrix?

Please submit a Request for Quotation (RFQ) for BUV26 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for BUV26 reliable?

The price and inventory of BUV26 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BUV26 is usually 5 days.

3.What payment methods are accepted for BUV26?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BUV26 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BUV26?

BUV26 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BUV26 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for BUV26?

For technical support, including BUV26 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BUV26 requirements.

6.How does Aetrix verify that BUV26 is sourced from the original manufacturer or authorized distributors?

All BUV26 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that BUV26 meets industry standards.

7.What is the process for return or replacement of BUV26?

All BUV26 units undergo pre-shipment inspection (PSI). If there is an issue with BUV26, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The BUV26 part is unused and in its original packaging.

Return procedure for BUV26:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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