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Nexperia USA Inc. BF620-QX
- Part No.:
- BF620-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Bipolar Transistors
- Package:
- TO-243AA
- Datasheet:
-
BF620-QX.pdf
- Description:
- TRANS NPN 300V 0.05A SOT-89
- Quantity:
- Payment:
- Shipping:
Inventory:9,465
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Product details
Overview
BF620-QX from Nexperia is an NPN high-voltage transistor in SOT89 (SC-62) surface-mount package, rated for 300 V VCEO, 50 mA IC, and DC current gain (hFE) ≥50 at 25 mA/20 V. It operates up to 150 °C junction temperature and is AEC-Q101 qualified for automotive video output stages.
For engineers reviewing the BF620-QX datasheet, BF620-QX pinout, BF620-QX application, or BF620-QX equivalent, key selection criteria include high-voltage switching capability in compact SOT89 footprint, thermal performance on FR4 PCBs with varying collector pad sizes, and automotive-grade reliability validation per AEC-Q101.
Technical Context
This discrete NPN bipolar junction transistor is optimized for high-voltage, low-current switching-specifically video signal amplification and deflection circuits where stable gain and breakdown margin are critical. Its 300 V VCEO and 300 V VCBO support operation across wide supply rails without avalanche conduction.
The device exhibits fT = 60 MHz and Cre = 1.6 pF at 30 V, enabling moderate-frequency video signal handling while maintaining low feedback capacitance. Thermal resistance varies from 113 K/W (6 cm² collector pad) to 250 K/W (standard footprint), directly impacting power derating in real-world PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 300 V - Maximum collector-emitter voltage with base open; enables use in 200–250 V video supply rails with safety margin. |
| IC | 50 mA - Continuous collector current rating; suitable for low-power video driver stages, not power switching. |
| hFE | ≥50 at VCE = 20 V, IC = 25 mA - Ensures predictable DC biasing and gain stability in linear amplifier configurations. |
| VCE(sat) | 600 mV max at IC = 30 mA, IB = 5 mA - Low saturation voltage reduces power loss and heating during active switching. |
| Rth(j-a) | 113–250 K/W - Thermal resistance range reflects PCB layout dependency; dictates maximum dissipation (0.8–1.1 W) under ambient conditions. |
| fT | 60 MHz - Transition frequency supports video bandwidth requirements up to ~10–20 MHz with adequate gain margin. |
| Cre | 1.6 pF at VCB = 30 V - Low feedback capacitance minimizes signal coupling and instability in high-gain video amplifier designs. |
Pinout & Package
SOT89 (SC-62) plastic surface-mount package: 3-lead, 1.5 mm pitch, 4.5 mm × 2.5 mm × 1.5 mm body; collector tab thermally and electrically connected to Pin 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Emitter (E) | Current sink node; connects to ground or low-impedance return path in common-emitter video output configuration. |
| 2 | Collector (C) | Main high-voltage output node; electrically and thermally tied to exposed metal tab for heat dissipation into PCB copper. |
| 3 | Base (B) | Control input; requires current-limited drive (≤50 mA peak) to ensure reliable turn-on without overdrive stress. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including temperature cycling, humidity, and mechanical shock per discrete semiconductor standard. |
| 300 V high-voltage rating | Supports direct interface with CRT video supplies or high-side video drivers without external snubbers or clamping networks. |
| Low leakage (ICBO ≤ 10 nA @ 200 V) | Ensures minimal dark current in video blanking and cutoff states, preserving black-level accuracy and contrast ratio. |
| Thermally enhanced SOT89 package | Exposed collector tab enables >1 W dissipation when mounted on ≥6 cm² copper area-critical for sustained video output duty cycles. |
Applications
| Video Output Stages | Automotive Display Drivers |
|---|---|
|
Use Scenario: Amplifying composite video signals before driving coaxial cable or CRT deflection yoke loads. IC Role / Device Role / Timing Role: NPN switch/amplifier in common-emitter configuration delivering line-synchronized video pulses with fast rise/fall times. Use Value: 300 V rating accommodates flyback-induced transients; 60 MHz fT preserves luminance bandwidth up to 10 MHz without phase distortion. |
Use Scenario: Driving analog video outputs in automotive infotainment head units with rear-seat displays. IC Role / Device Role / Timing Role: High-voltage buffer stage isolating SoC video DAC outputs from variable cable/load impedances. Use Value: AEC-Q101 qualification ensures reliability across -40 °C to +105 °C ambient; low ICBO prevents ghosting in dark scenes. |
| High-Voltage Signal Switching | Legacy CRT Monitor Circuits |
|
Use Scenario: Selecting between multiple video sources using emitter-follower or switch-mode topologies. IC Role / Device Role / Timing Role: Low-leakage, high-breakdown switch controlling signal path integrity in multi-input video multiplexers. Use Value: 5 V VEBO and 100 mA ICM allow robust control under transient overvoltage conditions without latch-up. |
Use Scenario: Horizontal deflection output stage in legacy CRT monitors requiring precise timing and high-voltage swing. IC Role / Device Role / Timing Role: Linear amplifier operating in Class-A or AB mode to deliver sawtooth waveforms to deflection yoke. Use Value: Stable hFE ≥50 ensures consistent gain across temperature; 150 °C Tj rating supports continuous operation in enclosed chassis. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN high-voltage transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BC817-40-Q | Lower VCEO (45 V), higher IC (500 mA), same SOT23 package | Not suitable for >100 V video rails; limited to low-voltage logic-level switching | Select only if system voltage ≤40 V and higher current drive is required. |
| BUV27 | Higher VCEO (1000 V), TO-126 package, no AEC-Q101 qualification | Over-specified voltage rating; larger footprint and thermal mass unsuitable for space-constrained video modules | Prefer for industrial HV switching where automotive qualification is unnecessary and board space allows. |
Compared with BC817-40-Q and BUV27, BF620-QX uniquely balances 300 V capability, AEC-Q101 compliance, and SOT89 thermal efficiency-making it optimal for automotive and consumer video output stages where voltage, size, and reliability intersect.
Availability
BF620-QX is available at Aetrix Electronics and suitable for automotive display drivers, CRT video output stages, high-voltage signal switching, and legacy monitor repair requiring stable component supply and long-term lifecycle support.
Supply support for BF620-QX 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
Nexperia is a global semiconductor expert focused on high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified components and advanced packaging technologies.
BF620-QX belongs to Nexperia's AEC-Q101-qualified high-voltage transistor product line, engineered specifically for robust video signal amplification and switching in automotive and industrial display systems.
FAQ
Is BF620-QX pin-compatible with other SOT89 NPN transistors?
Yes-BF620-QX follows standard SOT89 pinning: Pin 1 = Emitter, Pin 2 = Collector, Pin 3 = Base. This matches industry-standard SOT89 NPN layouts including MMBT4401 and ZTX653, enabling drop-in replacement where voltage/current ratings align.
What is the maximum allowable power dissipation at 75 °C ambient?
At 75 °C ambient, BF620-QX's maximum power dissipation is 0.8 W when mounted on an FR4 PCB with 1 cm² collector pad (Rth(j-a) = 156 K/W). Derating follows linear curve: Ptot = 1.1 W − ((Tamb − 25) × 0.008 W/°C).
Does BF620-QX support pulsed operation beyond its DC current rating?
Yes-peak collector current ICM is rated at 100 mA for single pulses ≤1 ms. This enables short-duration video sync pulse handling or transient overload tolerance, provided average power remains within DC limits and thermal mass prevents junction overheating.
How does the marking "DC" identify the BF620-QX device on the package?
The marking "DC" is the official Nexperia top-side laser marking code for BF620-QX, as confirmed in Table 4 of the datasheet. It appears adjacent to the Nexperia logo on the SOT89 body and is used for traceability and counterfeit prevention in automated optical inspection.
BF620-QX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- TO-243AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Transistor Type:
- NPN
- Current - Collector (Ic) (Max):
- 50 mA
- Voltage - Collector Emitter Breakdown (Max):
- 300 V
- Vce Saturation (Max) @ Ib, Ic:
- 600mV @ 5mA, 30mA
- Current - Collector Cutoff (Max):
- 10nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 50 @ 25mA, 20V
- Power - Max:
- 500 mW
- Frequency - Transition:
- 60MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-89
BF620-QX FAQ
1.How can I place an order for BF620-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BF620-QX 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 BF620-QX reliable?
The price and inventory of BF620-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BF620-QX is usually 5 days.
3.What payment methods are accepted for BF620-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BF620-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BF620-QX?
BF620-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BF620-QX 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 BF620-QX?
For technical support, including BF620-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BF620-QX requirements.
6.How does Aetrix verify that BF620-QX is sourced from the original manufacturer or authorized distributors?
All BF620-QX 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 BF620-QX meets industry standards.
7.What is the process for return or replacement of BF620-QX?
All BF620-QX units undergo pre-shipment inspection (PSI). If there is an issue with BF620-QX, 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 BF620-QX part is unused and in its original packaging.
Return procedure for BF620-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BF620-QX Tags
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