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

Microchip Technology 2N6284

Name: 2N6284
Brand: Microchip Technology
SKU: 2N6284
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 2N6284

Manufacturer:: Microchip Technology

Category:: Single Bipolar Transistors

Package:: TO-204AA, TO-3

Datasheet:: 2N6284.pdf

Description:: TRANS NPN DARL 100V 20A TO204AA

Quantity:: RFQ Add To RFQ list

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Inventory:6,796

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Product details

Overview

2N6284 from STMicroelectronics is an NPN epitaxial-base power Darlington transistor in TO-3 metal package, designed for audio power amplification and low-frequency switching. It delivers 20 A collector current, 100 V V_CEO, and 160 W total dissipation at T_C = 25 °C, with integrated collector-emitter antiparallel diode for inductive load handling in DC-AC converters.

For engineers reviewing the 2N6284 datasheet, 2N6284 pinout, 2N6284 application, or 2N6284 equivalent, key selection criteria include its monolithic Darlington gain (h_FE = 750–18,000 at I_C = 10–20 A), V_CE(sat) ≤ 3 V at I_C = 20 A / I_B = 200 mA, thermal resistance of 1.09 °C/W, and suitability for linear amplifier stages requiring high current drive and robust SOA.

Technical Context

The 2N6284 employs a monolithic Darlington configuration with internal base resistors (R1 ≈ 8 kΩ, R2 ≈ 60 kΩ), enabling simplified biasing and improved turn-on control. Its integrated antiparallel diode provides inherent flyback protection during inductive switching, eliminating external diode requirements in relay or motor driver circuits.

Designed for operation up to 200 °C junction temperature and rated for 40 A pulsed collector current (t_P < 5 ms), it supports ruggedized low-frequency (<10 kHz) power stages where high DC current gain and thermal stability outweigh high-speed switching needs.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	100 V - Maximum safe collector-emitter voltage under open-base condition; defines usable rail voltage in linear amplifiers and switch-mode topologies.
I_C	20 A continuous - Sustained output current capability; enables direct drive of high-power loudspeakers or solenoids without external current boosting.
P_tot	160 W at T_C = 25 °C - Total thermal power dissipation limit; requires heatsink design supporting ≤1.09 °C/W junction-to-case resistance.
h_FE	750–18,000 - High DC current gain across 10–20 A range; reduces required base drive current and simplifies driver stage design.
V_CE(sat)	≤3 V at I_C = 20 A / I_B = 200 mA - Low saturation voltage minimizes conduction loss and heat generation in switching applications.
R_thj-case	1.09 °C/W max - Quantifies thermal bottleneck between die and case; critical for calculating heatsink size and maximum ambient operating temperature.

Pinout & Package

2N6284 is housed in a TO-3 metal package with three terminals: Collector (case), Emitter (lead 1), Base (lead 2). The metal case serves as the collector terminal and must be electrically isolated from heatsink unless circuit topology permits common-collector configuration.

Pin/Terminal	Circuit Role	Design Meaning
Case (Metal Can)	Collector	Primary current-carrying terminal; thermally coupled to die; requires insulating washer if mounted to grounded heatsink.
Lead 1	Emitter	Output current return path; connected internally to emitter of Darlington pair; referenced for base drive and load connection.
Lead 2	Base	Control input; drives internal Darlington pair via integrated R1/R2 network; accepts ~200 mA for full 20 A output.

Key Features

Feature	Design Value
Monolithic Darlington structure	Single-die integration eliminates inter-device matching drift and parasitic inductance, ensuring stable gain and fast turn-on in high-current stages.
Integrated antiparallel diode	Eliminates need for external flyback diode in inductive switching, reducing BOM count and PCB footprint in DC-AC inverters and motor drivers.
TO-3 metal package	Provides low thermal resistance (1.09 °C/W) and mechanical robustness for industrial environments; supports direct mounting to large heatsinks.
High h_FE at 20 A	Delivers ≥100 DC gain even at full rated current, enabling simple resistor-based base drive instead of complex active driver circuits.

Applications

Audio Power Amplifier

DC-AC Converter

Use Scenario: Output stage of Class-AB hi-fi amplifier driving 4 Ω loudspeakers with peak currents >15 A.

IC Role / Device Role / Timing Role: NPN power output transistor delivering high-fidelity analog current with minimal crossover distortion.

Use Value: High h_FE ensures precise current mirroring and low quiescent current drift across temperature, preserving amplifier linearity.

Use Scenario: Half-bridge switch in 50/60 Hz offline inverter powering AC loads from 24 V DC battery bank.

IC Role / Device Role / Timing Role: Low-frequency power switch controlling energy transfer to transformer primary winding.

Use Value: Integrated antiparallel diode clamps inductive kickback during dead-time, preventing voltage overshoot and MOSFET/FET replacement.

Industrial Relay Driver

DC Motor Controller

Use Scenario: Solid-state replacement for electromechanical relays controlling HVAC dampers or industrial valves.

IC Role / Device Role / Timing Role: High-current switch interfacing microcontroller GPIO to 24 V / 10 A inductive relay coil.

Use Value: 40 A pulsed rating accommodates relay coil inrush current; TO-3 package withstands repeated thermal cycling in factory environments.

Use Scenario: H-bridge low-side switch in brushed DC motor controller for conveyor belt actuation.

IC Role / Device Role / Timing Role: Current-sinking power transistor regulating motor direction and speed via PWM at <5 kHz.

Use Value: V_CE(sat) ≤3 V at 20 A limits conduction loss to <60 W, enabling air-cooled operation without forced airflow.

Equivalent & Alternatives

The following parts are listed as comparable options for similar power Darlington switching applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MJ15003	Higher V_CEO (150 V), lower h_FE (30–100), no integrated diode	Requires external flyback diode; better suited for higher-voltage SMPS than audio amplifiers	Select when >120 V rail voltage or tighter SOA control is needed; avoid if board space is constrained.
TIP142	TO-218 package, lower P_tot (125 W), h_FE = 1000–5000, integrated diode	Lower thermal capacity; limited to ≤15 A continuous in same heatsink	Choose for cost-sensitive, medium-power designs where TO-3 footprint is unavailable or PCB layout prohibits large metal can.

Compared with MJ15003 and TIP142, the 2N6284 offers superior thermal performance (160 W / 1.09 °C/W) and highest h_FE at full current-making it optimal for high-fidelity audio output stages and ruggedized industrial switching where gain stability and heat dissipation are critical.

Availability

2N6284 is available at Aetrix Electronics and suitable for audio power amplifiers, DC-AC converters, and industrial relay drivers requiring stable component supply and long-term industrial lifecycle support.

Supply support for 2N6284 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 2N6284 belongs to ST's legacy power bipolar transistor family, engineered specifically for high-current linear and switching applications demanding reliability, thermal resilience, and proven field performance in industrial infrastructure.

FAQ

Is the 2N6284 RoHS-compliant?

Yes, the 2N6284 meets RoHS Directive 2011/65/EU requirements as confirmed by STMicroelectronics' ECOPACK® documentation. It uses lead-free terminations and halogen-free molding compounds, with full compliance data available in ST's official product change notices dated 2009 onward.

Can the 2N6284 replace the 2N3055 in audio amplifier designs?

No-while both are NPN power transistors, the 2N6284 is a Darlington with h_FE > 750 and integrated diode, whereas the 2N3055 is a single-junction device with h_FE ≈ 20–70. Direct substitution would cause severe bias instability and potential thermal runaway without circuit redesign.

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

At T_C = 100 °C, the 2N6284's maximum continuous collector current drops to 12 A (derated from 20 A at 25 °C), and V_CEO remains 100 V. SOA curves in Figure 6 of the datasheet confirm second breakdown limits at 10 A / 80 V for DC operation, requiring careful heatsink sizing.

Does the internal antiparallel diode have specified reverse recovery characteristics?

No-ST's datasheet does not specify t_rr, Q_rr, or softness factor for the integrated diode. It is optimized for low-frequency clamping (≤100 Hz), not high-speed switching; use external ultrafast diodes if operating above 1 kHz.

2N6284 Specifications

Product attributes: Attribute value

Manufacturer:: Microchip Technology

Series:: -

Package/Case:: TO-204AA, TO-3

Packaging:: Bulk

Product Status:: Active

Transistor Type:: NPN - Darlington

Current - Collector (Ic) (Max):: 20 A

Voltage - Collector Emitter Breakdown (Max):: 100 V

Vce Saturation (Max) @ Ib, Ic:: 3V @ 200mA, 20A

Current - Collector Cutoff (Max):: 1mA

DC Current Gain (hFE) (Min) @ Ic, Vce:: 1500 @ 1A, 3V

Power - Max:: 175 W

Frequency - Transition:: -

Operating Temperature:: -65°C ~ 200°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-204AA (TO-3)

2N6284 FAQ

1.How can I place an order for 2N6284 through Aetrix?

Please submit a Request for Quotation (RFQ) for 2N6284 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 2N6284 reliable?

The price and inventory of 2N6284 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 2N6284 is usually 5 days.

3.What payment methods are accepted for 2N6284?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2N6284 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 2N6284?

2N6284 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 2N6284 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 2N6284?

For technical support, including 2N6284 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2N6284 requirements.

6.How does Aetrix verify that 2N6284 is sourced from the original manufacturer or authorized distributors?

All 2N6284 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 2N6284 meets industry standards.

7.What is the process for return or replacement of 2N6284?

All 2N6284 units undergo pre-shipment inspection (PSI). If there is an issue with 2N6284, 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 2N6284 part is unused and in its original packaging.

Return procedure for 2N6284:

1.Submit a request within 90 days.

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

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