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Nexperia USA Inc. BF622-QX
- Part No.:
- BF622-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Bipolar Transistors
- Package:
- TO-243AA
- Datasheet:
-
BF622-QX.pdf
- Description:
- TRANS NPN 250V 0.05A SOT-89
- Quantity:
- Payment:
- Shipping:
Inventory:2,830
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Product details
Overview
BF622-QX from Nexperia is an NPN high-voltage transistor in SOT89 (SC-62) surface-mount package, rated for 250 VCEO, 50 mA continuous collector current, and DC current gain (hFE) ≥50 at 25 mA/20 V; designed for video output stages in automotive-grade systems.
For engineers reviewing the BF622-QX datasheet, BF622-QX pinout, BF622-QX application, or BF622-QX equivalent, key selection criteria include high-voltage switching capability under AEC-Q101 qualification, thermal performance on FR4 PCBs with varying collector pad sizes, and low-leakage operation at elevated junction temperatures.
Technical Context
This discrete NPN bipolar junction transistor operates as a high-voltage switch with open-base VCEO = 250 V and VCBO = 250 V, supporting stable cutoff and saturation behavior up to 150 °C junction temperature. Its hFE ≥50 at 25 mA ensures predictable current amplification in linear or switching configurations.
Thermal design relies on validated Rth(j-a) values: 250 K/W (standard footprint), 156 K/W (1 cm² collector pad), and 113 K/W (6 cm² collector pad). Transient thermal impedance curves confirm pulse-handling capability across duty cycles down to 0.01 with tp ≤ 1 ms.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 250 V - Maximum collector-emitter voltage with base open; enables use in high-voltage video output coupling circuits. |
| IC | 50 mA - Continuous DC collector current rating; defines steady-state power handling in active biasing. |
| hFE | ≥50 - DC current gain at VCE = 20 V, IC = 25 mA; ensures reliable base drive sizing for switching control. |
| VCE(sat) | ≤600 mV - Collector-emitter saturation voltage at IC = 30 mA, IB = 5 mA; minimizes conduction loss during on-state. |
| Rth(j-a) | 113–250 K/W - Junction-to-ambient thermal resistance depending on PCB copper area; directly impacts safe operating area derating. |
| fT | 60 MHz - Transition frequency at VCE = 10 V, IC = −10 mA; supports video-frequency signal amplification and switching. |
Pinout & Package
SOT89 (SC-62) plastic surface-mount package: 3-pin, 1.5 mm lead pitch, 4.5 mm × 2.5 mm × 1.5 mm body; thermally enhanced with exposed collector tab for PCB heat sinking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Emitter | Current sink node; connects to ground or low-side reference; requires low-inductance routing for fast switching. |
| 2 | Collector | Main high-voltage output node; electrically and thermally connected to PCB copper pour for power dissipation. |
| 3 | Base | Control input; driven with current-limited source to achieve specified hFE-based gain and avoid overdrive. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Stress-tested per automotive discrete semiconductor standard; supports deployment in vehicle infotainment and display modules. |
| High VCEO (250 V) | Enables direct interface with CRT or LCD video driver rails without external voltage clamping components. |
| Low ICBO (≤10 nA @ 25 °C) | Ensures minimal leakage-induced offset drift in precision analog video output stages. |
| Thermally optimized SOT89 | Exposed collector pad allows scalable thermal management via PCB copper area-supports 1.1 W Ptot with 6 cm² pad. |
Applications
| Video Output Stage | Automotive Display Driver |
|---|---|
Use Scenario: Amplifying composite video signals before transmission to CRT or analog LCD panels. IC Role / Device Role / Timing Role: High-voltage NPN switch amplifying baseband luminance/chrominance signals with minimal distortion. Use Value: 250 VCEO withstands flyback transients; 60 MHz fT preserves video bandwidth up to ~5 MHz. |
Use Scenario: Driving backlight or segment lines in instrument cluster displays under extended temperature ranges. IC Role / Device Role / Timing Role: Discrete high-voltage switch controlling LED or EL panel segments in AEC-Q101-compliant modules. Use Value: Qualified operation from −65 °C to +150 °C ambient; low ICBO prevents thermal runaway in sealed enclosures. |
| High-Voltage Signal Coupling | Automotive Camera Interface |
Use Scenario: Isolating and level-shifting video sync pulses between sensor and processor domains. IC Role / Device Role / Timing Role: DC-coupled emitter-follower or common-emitter stage translating TTL/CMOS logic to higher-voltage domains. Use Value: VCEO = 250 V and VCBO = 250 V support robust isolation against ESD and load dump events. |
Use Scenario: Buffering analog video outputs from image sensors in rear-view or surround-view camera modules. IC Role / Device Role / Timing Role: Low-noise, high-linearity amplifier stage preserving SNR in 720p/1080p analog video paths. Use Value: Cre = 1.6 pF minimizes capacitive loading on high-impedance sensor outputs; hFE ≥50 ensures stable gain control. |
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 |
|---|---|---|---|
| BC817-40,215 | Lower VCEO (45 V), higher IC (500 mA), SOT23 package | Not suitable for >100 V video coupling; limited to low-voltage digital switching | Select only when voltage stress <45 V and board space is constrained. |
| BUV24 | Higher VCEO (300 V), TO-126 package, Ptot = 15 W | Requires through-hole mounting and heatsink; incompatible with SMT-only assembly | Choose for higher-power analog video drivers where thermal mass outweighs SMT compatibility. |
Compared with BC817-40,215 and BUV24, the BF622-QX uniquely balances 250 V capability, SOT89 surface-mount compatibility, and AEC-Q101 qualification-making it optimal for compact, automotive-grade video output stages where voltage, size, and reliability intersect.
Availability
BF622-QX is available at Aetrix Electronics and suitable for video output stages, automotive display drivers, high-voltage signal coupling, and automotive camera interfaces requiring stable component supply and automotive-grade reliability.
Supply support for BF622-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.
The BF622-QX belongs to Nexperia's AEC-Q101-qualified high-voltage transistor product line, engineered specifically for analog video signal integrity and thermal stability in automotive infotainment and ADAS subsystems.
FAQ
What is the maximum allowable junction temperature for BF622-QX?
The absolute maximum junction temperature (Tj) is 150 °C, as defined in the Absolute Maximum Ratings table. Operation beyond this limit risks permanent degradation of hFE, increased leakage, and bond wire failure. Thermal design must ensure Tj remains within specification using the provided Rth(j-a) values and PCB copper area guidelines.
Is BF622-QX pin-compatible with other SOT89 NPN transistors?
Yes-BF622-QX follows the standard SOT89 pinout: Pin 1 = Emitter, Pin 2 = Collector, Pin 3 = Base. This matches industry-standard SOT89 NPN layouts including MMBT5551 and ZTX653, enabling mechanical drop-in replacement if voltage/current ratings align.
Does BF622-QX require a heatsink in typical video output applications?
No dedicated heatsink is required. With a 6 cm² copper pad on FR4 PCB, its Rth(j-a) drops to 113 K/W, allowing 1.1 W total power dissipation at Tamb = 25 °C. Most video output stages operate well below this limit; thermal validation should be performed using the derating curve in Figure 1.
How does the AEC-Q101 qualification impact BF622-QX usage in non-automotive designs?
AEC-Q101 qualification confirms robustness against temperature cycling, humidity, mechanical shock, and ESD-benefiting any high-reliability application. While not required outside automotive, it provides assurance for industrial video equipment, medical imaging interfaces, and aerospace-adjacent systems where long-term parametric stability is critical.
BF622-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):
- 250 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
BF622-QX FAQ
1.How can I place an order for BF622-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BF622-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 BF622-QX reliable?
The price and inventory of BF622-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BF622-QX is usually 5 days.
3.What payment methods are accepted for BF622-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BF622-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BF622-QX?
BF622-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BF622-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 BF622-QX?
For technical support, including BF622-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BF622-QX requirements.
6.How does Aetrix verify that BF622-QX is sourced from the original manufacturer or authorized distributors?
All BF622-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 BF622-QX meets industry standards.
7.What is the process for return or replacement of BF622-QX?
All BF622-QX units undergo pre-shipment inspection (PSI). If there is an issue with BF622-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 BF622-QX part is unused and in its original packaging.
Return procedure for BF622-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BF622-QX Tags
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