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onsemi 2N6519BU
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- Part No.:
- 2N6519BU
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- TO-226-3, TO-92-3 (TO-226AA)
- Datasheet:
-
2N6519BU.pdf
- Description:
- TRANS PNP 300V 0.5A TO-92-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,912
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Product details
Overview
2N6519BU from Fairchild Semiconductor is a PNP epitaxial silicon transistor rated for -300 V collector-emitter voltage, -500 mA continuous collector current, and 625 mW power dissipation in TO-92 package; used in high-voltage switching and linear amplification circuits such as CRT deflection drivers and industrial relay interfaces.
For engineers reviewing the 2N6519BU datasheet, pinout, applications, or equivalent options, key selection criteria include verified VCEO = -300 V, hFE = 30–270 at IC = -1 mA to -100 mA, saturation voltage down to -0.30 V at IC/IB = -10 mA/-1 mA, and TO-92 mechanical compatibility with legacy through-hole designs.
Technical Context
This PNP bipolar junction transistor operates in active, saturation, and cutoff regions with guaranteed breakdown voltages of -300 V (VCEO, VCBO) and -5 V (VEBO), supporting high-voltage DC-DC converter feedback stages and pulse-width modulated load switches where reverse polarity operation is required.
Its fT of 40–200 MHz enables use in medium-frequency amplifier stages up to ~100 MHz, while Cob = 6 pF and CEB = 100 pF define small-signal capacitance limits; turn-on/turn-off times of 200 ns and 3.5 ns respectively support fast-switching applications under controlled base drive conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCBO / VCEO | -300 V - supports operation in circuits with up to 300 V reverse collector-base or collector-emitter bias without avalanche breakdown |
| IC (max) | -500 mA - continuous collector current rating defines maximum sustained load switching capability |
| PC (max) | 625 mW - thermal limit at 25°C ambient; derates 5 mW/°C above that temperature |
| hFE | 30–270 - DC current gain range across IC = -1 mA to -100 mA, enabling predictable base drive sizing |
| VCE(sat) | -0.30 V min at IC = -10 mA, IB = -1 mA - low saturation voltage reduces conduction loss in switching mode |
| fT | 40–200 MHz - usable for RF amplification or high-speed switching up to mid-VHF band |
Pinout & Package
2N6519BU is housed in a standard TO-92 plastic package with lead spacing compliant to JEDEC TO-92 outline; leads are arranged in straight-line configuration with emitter (pin 1), base (pin 2), and collector (pin 3) identified per Fairchild's official package drawing Rev. B2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Current source terminal for PNP device | Connected to most positive rail in typical common-emitter switch configuration |
| 2 (Base) | Control input for minority-carrier injection | Requires negative-going drive relative to emitter to forward-bias base-emitter junction |
| 3 (Collector) | Output current sink terminal | Connected to load and high-voltage negative supply in high-side switching topologies |
Key Features
| Feature | Design Value |
|---|---|
| High breakdown voltage | VCEO = -300 V enables direct interface with 200–300 V DC bus systems without external snubbing |
| Controlled saturation behavior | VCE(sat) ≤ -0.50 V at IC = -30 mA ensures < 15 mW conduction loss in medium-current switching |
| Stable gain over current range | hFE ≥ 40 at IC = -10 mA to -50 mA supports consistent base resistor design across operating points |
| Fast switching capability | tOFF = 3.5 ns allows >100 MHz pulse operation when driven with adequate base current slew rate |
Applications
| CRT Deflection Circuit | Industrial Relay Driver |
|---|---|
Use Scenario: Horizontal deflection yoke driver in analog television and monitor scan circuits requiring repetitive high-voltage pulses. IC Role / Device Role / Timing Role: PNP high-voltage switch controlling flyback transformer primary current during retrace interval. Use Value: VCEO = -300 V withstands flyback spikes; tOFF = 3.5 ns ensures clean turn-off before next line scan begins. | Use Scenario: Solid-state replacement for electromechanical relays in programmable logic controller (PLC) output modules. IC Role / Device Role / Timing Role: High-side load switch isolating 24–48 V DC control signals from field actuators. Use Value: -500 mA IC rating supports solenoid and indicator loads; TO-92 footprint simplifies retrofit into existing PCB layouts. |
| DC-DC Converter Feedback | High-Voltage Linear Amplifier |
Use Scenario: Error amplifier stage in isolated flyback or forward converter feedback loop using optocoupler interface. IC Role / Device Role / Timing Role: Transconductance amplifier translating secondary-side error signal to primary-side PWM controller. Use Value: hFE stability across -1 mA to -10 mA ensures accurate gain matching; low Cob = 6 pF minimizes phase shift at 10–100 kHz loop frequencies. | Use Scenario: Medium-power audio or signal amplification stage in test equipment requiring wide dynamic range and high output impedance. IC Role / Device Role / Timing Role: Common-emitter linear amplifier biased in Class-A with emitter degeneration resistor. Use Value: VCEO = -300 V permits large signal swing; fT ≥ 40 MHz preserves bandwidth up to 500 kHz with minimal distortion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP high-voltage transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPSA92 | VCEO = -300 V, IC = -500 mA, but hFE = 25–100 (lower gain spread); TO-92 package identical | Suitable for general-purpose switching but less ideal for precision gain-critical linear stages | Select when cost sensitivity outweighs need for high hFE consistency across current range |
| 2N5401 | VCEO = -150 V (half rating), IC = -600 mA, hFE = 40–240; same TO-92 footprint | Limited to ≤150 V systems; higher current capacity offsets lower voltage margin | Choose only if system voltage remains below 120 V DC and higher collector current headroom is needed |
Compared with MPSA92 and 2N5401, the 2N6519BU provides superior voltage margin at full rated current and broader hFE range-critical for stable biasing in high-voltage analog and switching designs where parameter variation must be minimized.
Availability
2N6519BU is available at Aetrix Electronics and suitable for CRT deflection circuits, industrial relay drivers, DC-DC converter feedback stages, and high-voltage linear amplifiers requiring stable component supply and long-term obsolescence management.
Supply support for 2N6519BU 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
Fairchild Semiconductor was a U.S.-based semiconductor manufacturer specializing in power discrete devices, analog ICs, and interface solutions before its acquisition by ON Semiconductor in 2016.
The 2N6519BU belongs to Fairchild's legacy high-voltage bipolar transistor family designed specifically for robust performance in CRT, industrial control, and power conversion applications demanding reliable -300 V operation.
FAQ
What is the maximum collector-emitter voltage rating for the 2N6519BU?
The 2N6519BU has a guaranteed collector-emitter breakdown voltage (BVCEO) of -300 V at IC = -1 mA and IB = 0. This rating is validated per Fairchild's Rev. B2 datasheet and applies under steady-state DC conditions at 25°C ambient. Derating is required above 25°C per the specified 5 mW/°C thermal coefficient.
Is the 2N6519BU pin-compatible with other TO-92 PNP transistors like the MPSA92?
Yes, the 2N6519BU uses the standard TO-92 package with emitter-base-collector pinout (1-2-3), matching the physical layout of MPSA92 and 2N5401. However, electrical differences-including hFE range and voltage rating-require circuit-level validation before substitution.
What is the typical DC current gain (hFE) of the 2N6519BU at -10 mA collector current?
At VCE = -10 V and IC = -10 mA, the 2N6519BU exhibits hFE between 45 and 200 per Fairchild's datasheet. The minimum guaranteed value is 45, with typical units measuring near 100–150, supporting predictable base drive calculation in switching and linear configurations.
Can the 2N6519BU be used in switching power supplies operating above 100 kHz?
Yes-the 2N6519BU's fT of 40–200 MHz and tOFF of 3.5 ns enable use in switching power supplies up to ~500 kHz, provided base drive strength and layout minimize parasitic inductance. Its Cob = 6 pF helps maintain efficiency at higher frequencies compared to older high-voltage transistors.
Does the 2N6519BU have a documented safe operating area (SOA) curve?
No SOA graph is included in the publicly available Rev. B2 datasheet for the 2N6519BU. Engineers should derive safe operating boundaries using the absolute maximum ratings (VCBO, VCEO, IC, PC) and thermal resistance data, applying conservative derating for pulse conditions and elevated ambient temperatures.
2N6519BU Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-226-3, TO-92-3 (TO-226AA)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Transistor Type:
- PNP
- Current - Collector (Ic) (Max):
- 500 mA
- Voltage - Collector Emitter Breakdown (Max):
- 300 V
- Vce Saturation (Max) @ Ib, Ic:
- 1V @ 5mA, 50mA
- Current - Collector Cutoff (Max):
- 50nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 40 @ 50mA, 10V
- Power - Max:
- 625 mW
- Frequency - Transition:
- 200MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-92-3
2N6519BU FAQ
1.How can I place an order for 2N6519BU through Aetrix?
Please submit a Request for Quotation (RFQ) for 2N6519BU 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 2N6519BU reliable?
The price and inventory of 2N6519BU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 2N6519BU is usually 5 days.
3.What payment methods are accepted for 2N6519BU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2N6519BU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 2N6519BU?
2N6519BU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 2N6519BU 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 2N6519BU?
For technical support, including 2N6519BU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2N6519BU requirements.
6.How does Aetrix verify that 2N6519BU is sourced from the original manufacturer or authorized distributors?
All 2N6519BU 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 2N6519BU meets industry standards.
7.What is the process for return or replacement of 2N6519BU?
All 2N6519BU units undergo pre-shipment inspection (PSI). If there is an issue with 2N6519BU, 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 2N6519BU part is unused and in its original packaging.
Return procedure for 2N6519BU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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