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

onsemi 2N6497G

Name: 2N6497G
Brand: onsemi
SKU: 2N6497G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 2N6497G

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: TO-220-3

Datasheet:: 2N6497G.pdf

Description:: TRANS NPN 250V 5A TO-220

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Product details

Overview

2N6497G from onsemi is a high-voltage NPN silicon power transistor in TO-220AB package, rated for 250 V_CEO, 5 A continuous collector current, and 80 W power dissipation at T_C = 25°C; designed for switching power supplies, line-operated amplifiers, and high-voltage inverters.

For engineers reviewing the 2N6497G datasheet, pinout, applications, or equivalent options, key selection criteria include V_CEO(sus) ≥ 250 V, h_FE = 10–75 at I_C = 2.5 A, V_CE(sat) ≤ 1.0 V, thermal resistance R_JC = 1.56 °C/W, and Pb-free TO-220AB mechanical compatibility.

Technical Context

This device operates as a medium-power, high-voltage NPN bipolar junction transistor with DC current gain optimized for linear and switching applications up to 150°C junction temperature. Its sustaining voltage rating (V_CEO(sus) = 250 V) and low saturation voltage support robust operation in flyback and forward converter primary-side switches.

Switching performance is characterized by t_r = 0.4–1.0 µs, t_s = 1.4–2.5 µs, and t_f = 0.45–1.0 µs under V_CC = 125 V, I_C = 2.5 A conditions; f_T = 5.0 MHz confirms usable bandwidth for audio-frequency and SMPS control stages.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	250 Vdc - Withstands 250 V collector-emitter blocking voltage in active cutoff, enabling use in 200 V AC line-derived topologies.
I_C (cont)	5.0 Adc - Supports continuous output current up to 5 A at case temperature ≤25°C, suitable for 50–100 W power stages.
P_D @ T_C=25°C	80 W - Maximum steady-state power dissipation with heatsink; derates linearly at 0.64 W/°C above 25°C.
h_FE	10–75 @ I_C=2.5 A - Provides predictable base drive requirements across operating range; enables stable bias design in Class AB amplifiers.
V_CE(sat)	≤1.0 V @ I_C=2.5 A, I_B=500 mA - Limits conduction loss to ≤2.5 W per transistor, critical for efficiency in hard-switched converters.
R_JC	1.56 °C/W - Junction-to-case thermal resistance defines minimum heatsink requirement for thermal management.
f_T	5.0 MHz - Transition frequency supports reliable switching up to ~500 kHz with adequate gain margin in driver circuits.

Pinout & Package

2N6497G uses the standard TO-220AB package (Case 221A, Style 1), with metal tab electrically connected to collector. Mounting hole allows mechanical attachment and thermal interface to heatsink.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	Emitting terminal of NPN structure	Low-impedance return path for collector current; referenced to ground or negative rail in common-emitter configurations.
2 (Base)	Control electrode for carrier injection	Requires 500 mA peak base drive for full saturation at 2.5 A collector current; sensitive to ESD and overvoltage.
3 (Collector)	High-voltage current collection node	Internally connected to metal tab; must be isolated from heatsink unless circuit design intentionally ties collector to chassis ground.

Key Features

Feature	Design Value
High V_CEO(sus)	250 V minimum sustaining voltage ensures reliable operation in 230 VAC-input SMPS without snubber overdesign.
Pb-Free TO-220AB	RoHS-compliant lead-free finish meets global environmental regulations without compromising thermal or mechanical performance.
Low V_CE(sat)	1.0 V max at 2.5 A reduces conduction losses by >30% vs. legacy 1.5 V devices, improving system efficiency in high-duty-cycle operation.
Wide h_FE range	10–75 enables consistent biasing across production lots and temperature extremes, simplifying driver stage design.
Robust SOA	Second-breakdown-limited safe operating area supports pulsed loads up to 100 V × 3 A with 10% duty cycle at 25°C case temperature.

Applications

Switching Power Supply	Line-Operated Audio Amplifier
Use Scenario: Primary-side switch in 60–100 W offline flyback converter with universal AC input (85–265 VAC). IC Role / Device Role / Timing Role: High-voltage NPN power switch driven by PWM controller; handles repetitive 250 V blocking and 5 A peak current pulses. Use Value: 250 V V_CEO and 1.0 V V_CE(sat) reduce snubber losses and improve efficiency over 88% at full load.	Use Scenario: Output stage in 50 W Class AB audio amplifier powered directly from rectified 230 VAC mains. IC Role / Device Role / Timing Role: Linear power transistor delivering clean analog output; biased in active region with fixed emitter degeneration. Use Value: Stable h_FE (10–75) and low V_BE(sat) (1.5–2.5 V) enable precise quiescent current setting and low THD.
High-Voltage Inverter	DC Motor Drive (Industrial)
Use Scenario: Half-bridge leg in 200 VDC bus inverter driving induction heating coil or small PMSM. IC Role / Device Role / Timing Role: Switching element handling 200 V DC link voltage and 4–5 A motor phase current at 20 kHz PWM. Use Value: 5.0 MHz f_T and sub-1 µs rise/fall times ensure minimal switching loss and reduced EMI generation.	Use Scenario: H-bridge upper/lower switch in 48 V industrial DC motor controller delivering up to 5 A continuous torque current. IC Role / Device Role / Timing Role: Medium-power switching transistor controlled via optocoupled gate driver; operates with forced-air cooling. Use Value: R_JC = 1.56 °C/W enables thermal design with compact heatsink, supporting ambient temperatures up to 70°C.

Switching Power Supply

Line-Operated Audio Amplifier

Use Scenario: Primary-side switch in 60–100 W offline flyback converter with universal AC input (85–265 VAC).

IC Role / Device Role / Timing Role: High-voltage NPN power switch driven by PWM controller; handles repetitive 250 V blocking and 5 A peak current pulses.

Use Value: 250 V V_CEO and 1.0 V V_CE(sat) reduce snubber losses and improve efficiency over 88% at full load.

Use Scenario: Output stage in 50 W Class AB audio amplifier powered directly from rectified 230 VAC mains.

IC Role / Device Role / Timing Role: Linear power transistor delivering clean analog output; biased in active region with fixed emitter degeneration.

Use Value: Stable h_FE (10–75) and low V_BE(sat) (1.5–2.5 V) enable precise quiescent current setting and low THD.

High-Voltage Inverter

DC Motor Drive (Industrial)

Use Scenario: Half-bridge leg in 200 VDC bus inverter driving induction heating coil or small PMSM.

IC Role / Device Role / Timing Role: Switching element handling 200 V DC link voltage and 4–5 A motor phase current at 20 kHz PWM.

Use Value: 5.0 MHz f_T and sub-1 µs rise/fall times ensure minimal switching loss and reduced EMI generation.

Use Scenario: H-bridge upper/lower switch in 48 V industrial DC motor controller delivering up to 5 A continuous torque current.

IC Role / Device Role / Timing Role: Medium-power switching transistor controlled via optocoupled gate driver; operates with forced-air cooling.

Use Value: R_JC = 1.56 °C/W enables thermal design with compact heatsink, supporting ambient temperatures up to 70°C.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MJD127G	Lower V_CEO = 100 V, higher h_FE = 25–250, TO-252 surface-mount package	Not suitable for 230 VAC-derived topologies; limited to ≤100 V DC bus applications	Select only when board space constraints require SMT and voltage stress remains below 80 V.
2N6284	Higher V_CEO = 400 V, same TO-220AB package, but lower h_FE = 5–30 at I_C = 2.5 A	Supports wider input voltage range but requires larger base drive current for saturation	Choose when 400 V blocking is mandatory and driver stage can supply ≥1 A peak base current.

Compared with 2N6497G, MJD127G trades voltage capability for footprint and gain, while 2N6284 extends blocking voltage at the cost of base drive efficiency-making 2N6497G optimal for 200–250 V applications requiring balanced gain, loss, and thermal performance.

Availability

2N6497G is available at Aetrix Electronics and suitable for switching power supplies, line-operated amplifiers, and high-voltage inverters requiring stable component supply, RoHS compliance, and TO-220AB mechanical interchangeability.

Supply support for 2N6497G 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

onsemi (formerly ON Semiconductor) is a global semiconductor manufacturer specializing in energy-efficient power, analog, sensor, and connectivity solutions for automotive, industrial, cloud, and consumer markets.

The 2N6497G belongs to onsemi's legacy high-voltage bipolar power transistor family, engineered for reliability in mains-connected power conversion and linear amplification where ruggedness and parameter consistency are critical.

FAQ

What is the maximum continuous collector current rating for the 2N6497G?

The 2N6497G is rated for 5.0 Adc continuous collector current at case temperature T_C = 25°C. This rating decreases with rising case temperature, derating at 0.64 W/°C for power dissipation and correspondingly reducing allowable current per thermal limits shown in Figure 6 of the official datasheet. At T_C = 100°C, the practical I_C limit drops to approximately 2.5 A for safe operation.

Is the 2N6497G pin-compatible with other TO-220AB NPN transistors like the 2N3055?

No-the 2N6497G has emitter-base-collector pinout (E-B-C) in TO-220AB, whereas the 2N3055 uses collector-base-emitter (C-B-E). Swapping them without verifying pin assignment risks immediate device failure due to reversed polarity. Always confirm pinout using the marking diagram and Figure 1 in the 2N6497G datasheet before PCB layout or replacement.

Does the 2N6497G have built-in protection features such as thermal shutdown or overcurrent limiting?

No-the 2N6497G is a discrete bipolar power transistor with no integrated protection circuitry. It relies entirely on external design elements: base current limiting, heatsinking, SOA-aware gate/base drive, and external fast-acting fusing or current-sense feedback. Safe operation requires adherence to the SOA curves in Figure 4 and thermal response data in Figure 3 of the 2N6497G datasheet.

Can the 2N6497G be used in linear amplifier applications?

Yes-the 2N6497G is explicitly characterized for line-operated amplifier applications in its official documentation. Its specified h_FE stability across temperature, low V_CE(sat), and wide SOA make it suitable for Class AB output stages. However, proper heatsinking and bias network design are essential to maintain junction temperature below 150°C during sustained high-power output.

What does the 'G' suffix in 2N6497G indicate?

The 'G' suffix in 2N6497G denotes a Pb-free (lead-free) finish on the TO-220AB package, compliant with RoHS Directive 2011/65/EU. This replaces traditional tin-lead plating while maintaining identical electrical, thermal, and mechanical specifications-including R_JC = 1.56 °C/W and mounting dimensions-as the legacy 2N6497 part.

2N6497G Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: TO-220-3

Packaging:: Tube

Product Status:: Obsolete

Transistor Type:: NPN

Current - Collector (Ic) (Max):: 5 A

Voltage - Collector Emitter Breakdown (Max):: 250 V

Vce Saturation (Max) @ Ib, Ic:: 5V @ 2A, 5A

Current - Collector Cutoff (Max):: -

DC Current Gain (hFE) (Min) @ Ic, Vce:: 10 @ 2.5A, 10V

Power - Max:: 80 W

Frequency - Transition:: 5MHz

Operating Temperature:: -65°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-220

2N6497G FAQ

1.How can I place an order for 2N6497G through Aetrix?

Please submit a Request for Quotation (RFQ) for 2N6497G 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 2N6497G reliable?

The price and inventory of 2N6497G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 2N6497G is usually 5 days.

3.What payment methods are accepted for 2N6497G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2N6497G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 2N6497G?

2N6497G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 2N6497G 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 2N6497G?

For technical support, including 2N6497G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2N6497G requirements.

6.How does Aetrix verify that 2N6497G is sourced from the original manufacturer or authorized distributors?

All 2N6497G 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 2N6497G meets industry standards.

7.What is the process for return or replacement of 2N6497G?

All 2N6497G units undergo pre-shipment inspection (PSI). If there is an issue with 2N6497G, 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 2N6497G part is unused and in its original packaging.

Return procedure for 2N6497G:

1.Submit a request within 90 days.

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

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