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

STMicroelectronics BUV298V

Name: BUV298V
Brand: STMicroelectronics
SKU: BUV298V
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BUV298V

Manufacturer:: STMicroelectronics

Category:: Single Bipolar Transistors

Package:: ISOTOP

Datasheet:: BUV298V.pdf

Description:: TRANS NPN 450V 50A ISOTOP

Quantity:: RFQ Add To RFQ list

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Inventory:6,226

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Product details

Overview

BUV298V from STMicroelectronics is an NPN high-current power bipolar transistor module in ISOTOP package, rated for 850 V V_CEV, 50 A continuous collector current, and 250 W total dissipation at T_c = 25°C. It features ultra-low junction-to-case thermal resistance (0.5 °C/W), fully insulated U.L.-compliant construction, and is engineered for rugged motor control, welding equipment, and SMPS/UPS primary switching stages.

For engineers reviewing the BUV298V datasheet, BUV298V pinout, BUV298V application, or BUV298V equivalent, key selection criteria include its 450 V V_CEO(sus) sustaining voltage, 0.35 V typical V_CE(sat) at 32 A/6.4 A, 160 A/µs dI_C/dt capability, and 2500 V RMS insulation withstand voltage - all critical for high-reliability industrial power switching.

Technical Context

The BUV298V is a single-die NPN bipolar power module optimized for hard-switched inductive load applications. Its internal structure delivers low parasitic inductance and supports fast switching with t_s = 3.2 µs, t_f = 0.25 µs, and t_c = 0.5 µs under specified 32 A/6.4 A conditions at T_j = 100°C.

It operates with base-driven control logic and requires external gate/base drive circuitry. The device's safe operating area (SOA) is defined up to 450 V and 48 A without snubber, and it sustains 450 V at I_C = 0.2 A with zero base current - confirming robust avalanche-rated operation in unclamped inductive switching.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEV	850 V - Maximum collector-emitter voltage with V_BE = −5 V; defines hard-breakdown limit under reverse-biased base condition.
V_CEO(sus)	450 V - Sustaining voltage at I_C = 0.2 A with I_B = 0; enables snubberless operation in flyback and forward converters.
I_C	50 A - Continuous collector current rating at T_c = 25°C; sets maximum steady-state conduction capacity.
R_thj-case	0.5 °C/W - Junction-to-case thermal resistance; enables high-power dissipation with minimal temperature rise across heatsink interface.
V_CE(sat)	0.35 V (typ.) at I_C = 32 A, I_B = 6.4 A - Low saturation voltage reduces conduction losses in high-current switching nodes.
Visol	2500 V RMS - Insulation withstand voltage from all four leads to heatsink; eliminates need for insulating washers in chassis-mounted designs.
dI_C/dt	160 A/µs - Rated rate of current rise; supports fast turn-on in high-frequency inverter and welder primary stages.

Pinout & Package

The BUV298V is housed in an ISOTOP package - a fully insulated, stud-mount power module with four terminals: Collector (C), Emitter (E), Base (B), and auxiliary emitter (E2). Pin 4 (E2) is internally connected to E and used for Kelvin emitter sensing in high-accuracy current monitoring configurations.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1 (C)	Collector	Main high-side current path; electrically isolated from heatsink; rated for 850 V blocking.
Pin 2 (E)	Emitter	Primary emitter output; carries full load current; referenced to driver ground in standard configurations.
Pin 3 (B)	Base	Current-controlled input terminal; requires ~6.4 A peak base drive for full 32 A collector conduction.
Pin 4 (E2)	Auxiliary Emitter	Kelvin sense connection for emitter voltage feedback; not connected in standard use but enables precise V_CE monitoring.

Key Features

Feature	Design Value
Fully insulated U.L.-compliant package	Enables direct mounting to grounded heatsinks without isolation hardware, reducing system BOM and assembly cost.
0.5 °C/W R_thj-case	Supports 250 W dissipation with modest heatsink sizing - critical for space-constrained industrial inverters.
2500 V RMS insulation withstand	Eliminates risk of creepage failure in high-voltage industrial environments (e.g., 400–690 VAC mains-connected welders).
Snubberless 450 V operation	Reduces component count and layout complexity in SMPS primary switches by removing RC snubbers in many topologies.
Low internal parasitic inductance	Minimizes voltage overshoot during turn-off, improving reliability in fast-switching inductive loads like motor drives.

Applications

Motor Control

Welding Equipment

Use Scenario: High-power DC motor H-bridge and three-phase inverter legs in industrial servo drives.

IC Role / Device Role / Timing Role: Primary switching element in high-current, medium-voltage (≤450 V) motor phase legs.

Use Value: 50 A continuous rating and 75 A peak current support sustained torque delivery; low V_CE(sat) minimizes thermal stress during PWM conduction.

Use Scenario: Primary-side switch in IGBT- or MOSFET-assisted arc-welding inverters.

IC Role / Device Role / Timing Role: Main power switch in resonant or hard-switched DC-link choppers feeding welding transformers.

Use Value: 450 V V_CEO(sus) and snubberless SOA allow reliable operation under high di/dt short-circuit transients common in stick/tig welding.

SMPS Primary Switch

UPS Inverter Stage

Use Scenario: Single-ended forward or push-pull converter primary switch in 1–3 kW telecom/server SMPS units.

IC Role / Device Role / Timing Role: High-voltage, high-current switching node controlling energy transfer from bulk DC bus to transformer primary.

Use Value: 850 V V_CEV rating accommodates reflected transients and line surges; 0.5 °C/W thermal resistance ensures stable operation at full load.

Use Scenario: Output inverter bridge in online double-conversion UPS systems delivering 230 VAC/50 Hz.

IC Role / Device Role / Timing Role: High-current switching device in half-bridge or full-bridge output stage driving transformer-coupled AC output.

Use Value: Fully insulated ISOTOP package simplifies heatsinking in compact UPS chassis; 2500 V isolation prevents ground-loop faults in redundant power systems.

Availability

BUV298V is available at Aetrix Electronics and suitable for motor control, welding equipment, and SMPS/UPS requiring stable component supply despite its obsolete status - supported via legacy inventory and controlled lifecycle sourcing.

Supply support for BUV298V 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, designing and manufacturing analog, digital, and mixed-signal ICs, discrete devices, and modules for industrial, automotive, and power applications.

The BUV298V belongs to ST's high-voltage bipolar power transistor module family, developed specifically for ruggedized industrial switching where high surge current, insulation integrity, and thermal robustness are mandatory.

FAQ

Is BUV298V still in active production?

No - STMicroelectronics has marked BUV298V as obsolete per its November 2006 datasheet revision history. However, Aetrix Electronics maintains verified legacy stock with full traceability and provides engineering support for continued use in existing designs and maintenance programs.

What is the function of Pin 4 (E2) on the BUV298V?

Pin 4 is an auxiliary emitter (E2) terminal, internally bonded to the main emitter (Pin 2). It serves as a Kelvin sense point for accurate V_CE measurement and closed-loop current regulation, isolating sense path resistance from high-current emitter return paths.

Can BUV298V replace BUV298 in existing designs?

Yes - BUV298V is a direct replacement for BUV298, sharing identical pinout, electrical ratings, and ISOTOP package. The "V" suffix denotes enhanced insulation (2500 V RMS vs. 1500 V for BUV298) and improved thermal resistance, with no layout or drive changes required.

What base drive current is required for full conduction?

The BUV298V requires 6.4 A base current to achieve 32 A collector current at V_CE = 5 V and T_j = 25°C. For reliable saturation across temperature, design for ≥9.6 A peak base drive (per datasheet switching test conditions) using low-inductance PCB routing and fast-turn-off clamping.

BUV298V 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

BUV298V FAQ

1.How can I place an order for BUV298V through Aetrix?

Please submit a Request for Quotation (RFQ) for BUV298V 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 BUV298V reliable?

The price and inventory of BUV298V are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BUV298V is usually 5 days.

3.What payment methods are accepted for BUV298V?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BUV298V transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BUV298V?

BUV298V orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BUV298V 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 BUV298V?

For technical support, including BUV298V datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BUV298V requirements.

6.How does Aetrix verify that BUV298V is sourced from the original manufacturer or authorized distributors?

All BUV298V 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 BUV298V meets industry standards.

7.What is the process for return or replacement of BUV298V?

All BUV298V units undergo pre-shipment inspection (PSI). If there is an issue with BUV298V, 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 BUV298V part is unused and in its original packaging.

Return procedure for BUV298V:

1.Submit a request within 90 days.

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

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