Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

STMicroelectronics BUV298AV

Name: BUV298AV
Brand: STMicroelectronics
SKU: BUV298AV
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: BUV298AV

Manufacturer:: STMicroelectronics

Category:: Single Bipolar Transistors

Package:: ISOTOP

Datasheet:: BUV298AV.pdf

Description:: TRANS NPN 450V 50A ISOTOP

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:7,223

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

BUV298AV from STMicroelectronics is a high-current NPN bipolar power transistor module in ISOTOP package, rated for 1000 V V_CEV, 50 A continuous collector current, and 250 W total dissipation at T_C = 25 °C; designed for industrial motor control, welding equipment, and SMPS/UPS primary-side switching where high voltage blocking, low R_th(j-c) (0.5 °C/W), and 2500 V_RMS insulation are critical.

For engineers reviewing the BUV298AV datasheet, BUV298AV pinout, BUV298AV application, or BUV298AV equivalent, key selection factors include its specified accidental overload capability, insulated case rating, low internal parasitic inductance, and verified performance under inductive turn-off with L = 78 µH and V_clamp = 450 V.

Technical Context

This device operates as a ruggedized, insulated-base NPN switch optimized for hard-switched inductive loads. Its 0.5 °C/W junction-to-case thermal resistance enables high-power operation with minimal heatsink mass, while the 2500 V_RMS isolation supports safe mounting on live chassis without additional insulation barriers.

The BUV298AV features pulsed h_FE ≥12 at I_C = 32 A and V_CE = 5 V, V_CE(sat) ≤ 0.6 V (typ.) at same conditions, and di_C/dt capability up to 210 A/µs - enabling fast, controlled switching in high-energy circuits with minimal snubber demand.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEV	1000 V - Maximum non-repetitive collector-emitter voltage under V_BE = −5 V; defines peak surge withstand in unclamped inductive turn-off.
I_C	50 A - Continuous DC collector current at T_C = 25 °C; sets baseline conduction capacity for motor drive or UPS output stages.
R_th(j-c)	0.5 °C/W - Junction-to-case thermal resistance; enables compact thermal design with direct heatsink mounting and conductive grease.
V_ISO	2500 V_RMS - AC insulation withstand voltage between collector and case; eliminates need for insulating pads in grounded-chassis systems.
h_FE	≥12 @ I_C = 32 A - Minimum DC current gain ensures reliable base drive margin in high-current linear or quasi-saturated switching.
V_CE(sat)	≤0.6 V (typ.) @ I_C = 32 A, I_B = 6.4 A - Low saturation voltage reduces conduction loss and thermal stress in high-duty-cycle applications.
di_C/dt	210 A/µs - Maximum rate of rise of on-state collector current; supports fast turn-on with minimal oscillation in low-inductance layouts.

Pinout & Package

The BUV298AV uses the ISOTOP (Insulated Standard Outline Transistor Package) - a 4-terminal, insulated metal package with integral ceramic isolation barrier. Pin 4 is not connected; active terminals are Collector (Pin 1), Base (Pin 2), Emitter (Pin 3), and isolated case (Pin 4 NC).

Pin/Terminal	Circuit Role	Design Meaning
Pin 1	Collector	Main high-voltage, high-current output terminal; electrically isolated from case; mounted directly to heatsink via insulated interface.
Pin 2	Base	Control input requiring ~6.4 A peak drive for full saturation; low-impedance connection minimizes switching delay.
Pin 3	Emitter	Return path for collector current; referenced to system ground or floating node depending on topology; low-inductance bond wire layout.
Pin 4	Not Connected	No internal connection; mechanical support only; must remain unconnected to avoid unintended coupling or stress.

Key Features

Feature	Design Value
Insulated case (2500 V_RMS)	Enables direct mounting to grounded heatsinks without insulating washers - reducing thermal interface layers and assembly cost.
Very low R_th(j-c) (0.5 °C/W)	Supports >200 W effective power handling at practical heatsink temperatures, minimizing derating in enclosed industrial enclosures.
Specified accidental overload areas	Guaranteed safe operation under defined transient overcurrent conditions (e.g., short-circuit in motor windings) without destructive failure.
Low internal parasitic inductance	Reduces voltage overshoot during turn-off in high-di/dt circuits, lowering snubber component stress and EMI generation.
Easy-to-mount mechanical design	ISOTOP footprint with standardized hole pattern and flat mounting surface simplifies automated assembly and field replacement.

Applications

Motor Control

SMPS & UPS

Use Scenario: High-power DC motor drives for industrial conveyors and pumps operating at 400–600 V bus voltage.

IC Role / Device Role / Timing Role: Primary switching element in H-bridge or chopper configuration, handling bidirectional 50 A peak currents.

Use Value: 2500 V_RMS isolation allows direct heatsink grounding, eliminating creepage/clearance risks in compact cabinet designs.

Use Scenario: Primary-side switch in 3–5 kW offline SMPS for telecom rectifiers or UPS inverters.

IC Role / Device Role / Timing Role: Hard-switched power transistor in forward or push-pull topology, turning on/off at 20–50 kHz with 32 A average current.

Use Value: 0.5 °C/W R_th(j-c) enables stable operation at 125 °C junction temperature with standard extruded aluminum heatsinks.

Welding Equipment

Inductive Load Switching

Use Scenario: Output stage in IGBT-gated thyristor (IGCT)-assisted arc welding inverters with 1000 V DC link.

IC Role / Device Role / Timing Role: Fast-turning, high-dV/dt tolerant switch controlling energy delivery to welding torch during arc initiation and maintenance.

Use Value: Verified 210 A/µs di_C/dt and 450 V clamping sustain voltage ensure robust turn-off without snubber in high-L load circuits.

Use Scenario: Solid-state contactor for HVAC compressor or elevator brake control with 75 A inductive surges.

IC Role / Device Role / Timing Role: High-reliability power switch replacing electromechanical relays in safety-critical industrial controls.

Use Value: Specified accidental overload SOA guarantees survival during 10 ms 75 A peaks - exceeding IEC 60947-4-1 short-circuit requirements.

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-voltage, high-current bipolar switching applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BUV298A	No case insulation (V_ISO = 0); R_th(j-c) = 0.6 °C/W; identical electrical specs otherwise.	Requires insulated mounting hardware; unsuitable for direct-chassis heatsinking.	Select when isolation is provided externally and thermal budget allows +0.1 °C/W penalty.
STGW40H65DFB	650 V, 40 A IGBT with integrated freewheeling diode; lower gate drive requirement but higher V_CE(sat) (~1.8 V).	Better for >20 kHz switching; less suitable for <10 kHz hard-switched inductive loads due to tail current.	Prefer for higher-frequency SMPS; avoid where di/dt > 150 A/µs or V_CE > 600 V is required.

Compared with BUV298A, the BUV298AV adds critical isolation and tighter thermal resistance; versus STGW40H65DFB, it delivers superior dV/dt immunity and lower conduction loss below 10 kHz - making it optimal for ruggedized, low-frequency industrial switching.

Availability

BUV298AV is available at Aetrix Electronics and suitable for motor control, SMPS & UPS, and welding equipment requiring stable component supply, long-term industrial lifecycle support, and certified insulation integrity.

Supply support for BUV298AV 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 discrete devices, microcontrollers, and automotive ICs.

The BUV298AV belongs to ST's high-voltage bipolar power module family, engineered specifically for industrial-grade switching applications demanding reliability under repetitive overload, high ambient temperature, and harsh EMI environments.

FAQ

What is the maximum allowable case temperature for continuous operation?

The BUV298AV has a maximum operating junction temperature of 150 °C and a junction-to-case thermal resistance of 0.5 °C/W. With 250 W dissipation at T_C = 25 °C, continuous operation requires T_C ≤ 100 °C to maintain T_j ≤ 150 °C - verified by derating curves in the October 2001 datasheet, page 4.

Is Pin 4 internally connected or electrically isolated?

Pin 4 is explicitly marked "not connected" in the official STMicroelectronics datasheet (page 1, "INTERNAL SCHEMATIC DIAGRAM"). It serves only as a mechanical mounting aid and must remain unconnected in all PCB layouts to prevent unintended coupling or thermal stress.

Can BUV298AV replace BUV298A without board redesign?

No - BUV298AV includes 2500 V_RMS insulation between collector and case, whereas BUV298A lacks this feature. Direct substitution would violate creepage/clearance requirements unless external insulation is added, and thermal performance differs (R_th(j-c) = 0.5 vs. 0.6 °C/W).

What test conditions define the 450 V V_CEO(sus) rating?

V_CEO(sus) = 450 V is measured under pulsed conditions: I_C = 0.2 A, L = 25 mH, V_clamp = 450 V, per the "ELECTRICAL CHARACTERISTICS" table on page 2 of the October 2001 datasheet - representing sustaining voltage during inductive turn-off with active clamping.

BUV298AV Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: ISOTOP

Packaging:: Tube

Product Status:: Obsolete

Transistor Type:: NPN

Current - Collector (Ic) (Max):: 50 A

Voltage - Collector Emitter Breakdown (Max):: 450 V

Vce Saturation (Max) @ Ib, Ic:: 1.2V @ 6.4A, 32A

Current - Collector Cutoff (Max):: -

DC Current Gain (hFE) (Min) @ Ic, Vce:: 12 @ 32A, 5V

Power - Max:: 250 W

Frequency - Transition:: -

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Chassis Mount

Supplier Device Package:: ISOTOP

BUV298AV FAQ

1.How can I place an order for BUV298AV through Aetrix?

Please submit a Request for Quotation (RFQ) for BUV298AV 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 BUV298AV reliable?

The price and inventory of BUV298AV are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BUV298AV is usually 5 days.

3.What payment methods are accepted for BUV298AV?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BUV298AV transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BUV298AV?

BUV298AV orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BUV298AV 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 BUV298AV?

For technical support, including BUV298AV datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BUV298AV requirements.

6.How does Aetrix verify that BUV298AV is sourced from the original manufacturer or authorized distributors?

All BUV298AV 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 BUV298AV meets industry standards.

7.What is the process for return or replacement of BUV298AV?

All BUV298AV units undergo pre-shipment inspection (PSI). If there is an issue with BUV298AV, 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 BUV298AV part is unused and in its original packaging.

Return procedure for BUV298AV:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-08 Obsolete Electronic Components: How to Source and Evaluate Replacements

A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…