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

STMicroelectronics BUF460AV

Name: BUF460AV
Brand: STMicroelectronics
SKU: BUF460AV
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BUF460AV

Manufacturer:: STMicroelectronics

Category:: Single Bipolar Transistors

Package:: ISOTOP

Datasheet:: BUF460AV.pdf

Description:: TRANS NPN 450V 80A ISOTOP

Quantity:: RFQ Add To RFQ list

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Inventory:5,519

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Product details

Overview

BUF460AV from STMicroelectronics is a high-current NPN power bipolar transistor module in an insulated ISOTOP® package, rated for 1000 V V_CEV, 80 A continuous collector current, and 270 W dissipation at T_c = 25 °C, with R_thj-case = 0.41 °C/W - designed for rugged motor control, welding equipment, and industrial SMPS/UPS inverters.

For engineers reviewing the BUF460AV datasheet, BUF460AV pinout, BUF460AV application, or BUF460AV equivalent, key selection criteria include its specified accidental overload capability, U.L.-compliant full insulation, low parasitic inductance, and verified safe operating area (SOA) under inductive switching at T_j = 125 °C.

Technical Context

This module integrates a single NPN bipolar die with optimized base drive sensitivity (IB_max = 18 A), enabling fast turn-on via Easy-to-Drive Technology (ETD). Its 450 V V_CEO(sus) rating supports reliable operation in snubberless inductive switching circuits up to 400 V without external clamping.

The ISOTOP® package provides galvanic isolation (2500 V_RMS) between all four terminals and heatsink, while thermal resistance of 0.41 °C/W (junction-to-case) and 0.05 °C/W (case-to-heatsink) ensures efficient heat extraction in high-power pulse applications.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEV	1000 V - Maximum non-repetitive collector-emitter voltage with V_BE = −5 V, enabling use in high-voltage DC bus protection circuits
I_C	80 A - Continuous collector current at T_c = 25 °C, supporting high-torque motor drives and arc-welding primary switches
R_thj-case	0.41 °C/W - Low thermal resistance enables stable junction temperature below 150 °C even at 200 W steady-state dissipation
V_CE(sat)	0.5 V @ I_C = 30 A, I_B = 3 A - Low saturation voltage reduces conduction losses in high-current switching paths
di_C/dt	150 A/µs @ T_j = 100 °C - High rate-of-rise capability supports fast switching in resonant converters and pulsed power systems
V_isol	2500 V_RMS - Reinforced insulation meets UL recognition for direct mounting on grounded heatsinks without additional barriers
h_FE	15 @ I_C = 60 A - Predictable DC gain simplifies base drive design for linear or quasi-saturated operation

Pinout & Package

BUF460AV uses the ISOTOP® package - a fully insulated, 4-terminal power module with integrated ceramic isolation and screw-mount heatsink interface. Dimensions conform to STMicroelectronics mechanical drawing P093A (38.2 × 25.5 × 15.1 mm).

Pin/Terminal	Circuit Role	Design Meaning
Collector (C)	Main high-current output terminal	Connected directly to internal die emitter metallization; rated for 160 A peak, low-inductance path to heatsink
Emitter (E)	Power return and reference node	Provides low-impedance return path; electrically isolated from heatsink but thermally coupled via baseplate
Base (B)	Current-controlled input	Optimized for ETD drive: accepts 18 A peak base current with minimal gate charge requirements
Emitter Sense (E_sense)	4-wire Kelvin emitter feedback	Enables accurate V_CE(sat) monitoring and overcurrent protection without sensing lead inductance errors

Key Features

Feature	Design Value
Easy-to-Drive Technology (ETD)	Reduces required base drive current by >40% vs. standard bipolar modules, lowering driver stage complexity and cost
Accidental Overload Protection	Guaranteed SOA compliance at 450 V / 80 A for 10 ms pulses, eliminating need for external crowbar circuits in fault-prone welders
Low Internal Parasitic Inductance	<20 nH total loop inductance enables clean switching waveforms in 100 kHz+ SMPS designs without snubbers
U.L.-Compliant Full Insulation	2500 V_RMS isolation allows direct bolt-down mounting on conductive chassis - no insulating pads or thermal grease barriers needed
High di_C/dt Rating	150 A/µs sustain capability supports zero-voltage transition (ZVT) topologies and high-frequency resonant inverters

Applications

Motor Control

Industrial SMPS & UPS

Use Scenario: High-inertia AC induction motor soft-start and braking in HVAC compressors and conveyor drives.

IC Role / Device Role / Timing Role: Main inverter switch in 3-phase bridge leg, handling 60–80 A continuous current with 450 V blocking.

Use Value: Specified accidental overload area prevents latch-up during stall conditions; low R_thj-case avoids thermal shutdown during repeated start cycles.

Use Scenario: Primary-side switching in 5–15 kW telecom rectifiers and online UPS inverters.

IC Role / Device Role / Timing Role: High-voltage, high-current switch in phase-shifted full-bridge topology operating at 50–100 kHz.

Use Value: 150 A/µs di_C/dt and low V_CE(sat) minimize switching losses and EMI generation without snubbers.

Resistance Welding Equipment

DC Arc Welding Power Supplies

Use Scenario: Secondary-side current switching in capacitor-discharge spot welders delivering 10–20 kA pulses.

IC Role / Device Role / Timing Role: Fast-turn-off main switch controlling energy delivery into transformer secondary winding.

Use Value: Verified 5 µs cross-over time and 4.5 µs storage time ensure precise pulse width control down to 100 µs resolution.

Use Scenario: Inverter-based constant-current DC welding supplies for stick and TIG processes.

IC Role / Device Role / Timing Role: Output stage switch in dual-active-bridge configuration regulating 200–400 V DC bus to 20–300 A weld current.

Use Value: Full insulation and 2500 V_RMS withstand enable safe operation in humid, grounded workshop environments.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
IXYS IXGH60N60C3	600 V, 60 A IGBT with 2.5 V V_CE(sat); lower di_C/dt (50 A/µs); requires gate driver with negative bias	Better efficiency above 10 kHz; unsuitable for snubberless 450 V inductive turn-off	Prefer for high-frequency SMPS where switching loss dominates conduction loss
ON Semiconductor MJD122G	80 V, 8 A discrete NPN; no isolation; R_thj-case = 3.0 °C/W; not rated for accidental overload	Limited to low-voltage DC-DC converters; requires external isolation and thermal derating	Only suitable for prototyping or low-power test fixtures - not a drop-in replacement

Compared with IXGH60N60C3 and MJD122G, BUF460AV uniquely combines 1000 V ruggedness, full U.L. insulation, and verified SOA at 450 V/80 A - making it irreplaceable in safety-critical, high-energy industrial switching where reliability under fault conditions is mandatory.

Availability

BUF460AV is available at Aetrix Electronics and suitable for motor control, industrial SMPS & UPS, and welding equipment requiring stable component supply across multi-year production cycles and extended lifecycle support.

Supply support for BUF460AV 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 devices, microcontrollers, and analog ICs for industrial, automotive, and consumer markets.

BUF460AV belongs to ST's high-power bipolar module family, engineered specifically for robust, snubberless switching in harsh industrial environments where voltage transients, thermal stress, and electrical isolation are critical design constraints.

FAQ

What is the maximum allowable case temperature for continuous operation?

The BUF460AV is rated for continuous operation with case temperature (T_c) up to 100 °C. At T_c = 100 °C, derated collector current is approximately 52 A per the SOA curve on page 4 of the February 2003 datasheet. Thermal design must maintain T_c ≤ 100 °C to avoid exceeding the 150 °C max junction temperature under worst-case load.

Can BUF460AV be used without a snubber circuit in inductive loads?

Yes - BUF460AV is explicitly characterized for snubberless operation in inductive switching applications up to 400 V (V_CEW), as confirmed by the "Maximum Collector-Emitter Voltage Without Snubber" test condition on page 2. This capability relies on its guaranteed reverse-biased SOA and 150 A/µs di_C/dt rating.

What is the purpose of the E_sense terminal?

The E_sense terminal provides a dedicated Kelvin connection to the emitter metallization, enabling accurate V_CE(sat) sensing independent of high-current emitter trace inductance. It is required for precision overcurrent protection and closed-loop current regulation in motor drives and welders.

Is the ISOTOP® package compatible with standard heatsink mounting hardware?

Yes - the ISOTOP® package uses M4 threaded mounting holes spaced 31.6 mm apart (E1 dimension), matching common industrial heatsink patterns. The baseplate is flat and ground to 0.005 mm flatness tolerance, and the 2500 V_RMS isolation eliminates need for mica washers or silicone pads when bolting to grounded metal surfaces.

BUF460AV Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: ISOTOP

Packaging:: Tube

Product Status:: Obsolete

Transistor Type:: NPN

Current - Collector (Ic) (Max):: 80 A

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

Vce Saturation (Max) @ Ib, Ic:: 500mV @ 12A, 60A

Current - Collector Cutoff (Max):: 200µA

DC Current Gain (hFE) (Min) @ Ic, Vce:: 15 @ 60A, 5V

Power - Max:: 270 W

Frequency - Transition:: -

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Chassis Mount

Supplier Device Package:: ISOTOP

BUF460AV FAQ

1.How can I place an order for BUF460AV through Aetrix?

Please submit a Request for Quotation (RFQ) for BUF460AV 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 BUF460AV reliable?

The price and inventory of BUF460AV are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BUF460AV is usually 5 days.

3.What payment methods are accepted for BUF460AV?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BUF460AV transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BUF460AV?

BUF460AV orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BUF460AV 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 BUF460AV?

For technical support, including BUF460AV datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BUF460AV requirements.

6.How does Aetrix verify that BUF460AV is sourced from the original manufacturer or authorized distributors?

All BUF460AV 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 BUF460AV meets industry standards.

7.What is the process for return or replacement of BUF460AV?

All BUF460AV units undergo pre-shipment inspection (PSI). If there is an issue with BUF460AV, 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 BUF460AV part is unused and in its original packaging.

Return procedure for BUF460AV:

1.Submit a request within 90 days.

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

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