My Inquiry
My Account
Nexperia USA Inc. BF623-QX
- Part No.:
- BF623-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Bipolar Transistors
- Package:
- TO-243AA
- Datasheet:
-
BF623-QX.pdf
- Description:
- TRANS PNP 250V 0.05A SOT-89
- Quantity:
- Payment:
- Shipping:
Inventory:980
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BF623-QX from Nexperia is a PNP high-voltage bipolar junction transistor in SOT89 (SC-62) surface-mount package, rated for -250 V VCEO, -50 mA IC, and DC current gain (hFE) ≥50 at -25 mA/-20 V, qualified to AEC-Q101 for automotive video output stages.
For engineers reviewing the BF623-QX datasheet, BF623-QX pinout, BF623-QX application, or BF623-QX equivalent, this page delivers verified electrical parameters, thermal derating curves, SOT89 footprint details, and automotive-grade reliability context - critical for high-voltage analog switching and video signal amplification design.
Technical Context
This PNP transistor operates in linear or switching mode with VCEO = -250 V and VCB0 = -250 V, enabling use in high-side collector-load configurations where reverse breakdown margin is essential. Its hFE ≥50 at -25 mA ensures stable current control under moderate load conditions.
Thermal performance depends on PCB mounting: Rth(j-a) ranges from 113 K/W (6 cm² collector pad) to 250 K/W (standard footprint), directly impacting continuous power handling up to 1.1 W. Transient thermal impedance data supports pulse-width-limited operation up to 100 ms.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | -250 V - Maximum safe collector-emitter voltage with base open; defines upper limit for video output stage supply rail swing. |
| IC | -50 mA - Continuous collector current rating; sets maximum steady-state load drive capability. |
| hFE | ≥50 at VCE = -20 V, IC = -25 mA - Minimum DC current gain; ensures predictable base drive requirements in linear amplification. |
| VCE(sat) | -800 mV at IC = -30 mA, IB = -5 mA - Saturation voltage; determines conduction loss and heat generation in switching applications. |
| Cre | 1.6 pF at VCB = -30 V - Feedback capacitance; influences high-frequency stability and bandwidth in video amplifier feedback loops. |
| fT | 60 MHz at VCE = -10 V, IC = -10 mA - Transition frequency; confirms suitability for standard-definition video signal frequencies (≤10 MHz). |
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, with exposed collector tab for thermal conduction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Emitter (E) | Current sink terminal; connected to ground or bias network in common-base or common-collector video output configurations. |
| 2 | Collector (C) | Main power-handling terminal; electrically and thermally tied to PCB copper area for dissipation of up to 1.1 W. |
| 3 | Base (B) | Control input; requires current-limited drive (max IB = 50 mA peak) to avoid saturation delay or thermal runaway. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive temperature range (-65 °C to +150 °C) and stress testing - enables drop-in use in infotainment display drivers without requalification. |
| -250 V VCEO rating | Supports operation with >200 V supply rails in CRT or legacy LCD video output stages without external clamping. |
| SOT89 thermal design | Exposed collector pad allows direct PCB copper attachment - enables 1.1 W power dissipation with 6 cm² mounting area, reducing need for heatsinks. |
| Low leakage (ICBO ≤ -10 nA) | Minimizes dark-current error in precision analog video circuits operating at elevated junction temperatures. |
Applications
| Video Output Stage | Automotive Display Driver |
|---|---|
Use Scenario: Driving cathode loads in analog RGB video output circuits with ±150 V swing capability. IC Role / Device Role / Timing Role: High-voltage PNP switch amplifying composite sync or blanking signals in legacy broadcast equipment. Use Value: -250 V VCEO eliminates need for series-connected transistors or external snubbers in 200 V rail designs. |
Use Scenario: Controlling backlight dimming or deflection yoke current in automotive instrument cluster displays. IC Role / Device Role / Timing Role: Linear current regulator in analog-controlled CRT or vacuum fluorescent tube (VFD) driver modules. Use Value: AEC-Q101 qualification and -65 °C to +150 °C operation ensure reliability across vehicle cabin thermal cycles. |
| High-Voltage Signal Switch | Industrial Video Monitor Output |
Use Scenario: Selecting between multiple video sources using high-side PNP switching in broadcast routing hardware. IC Role / Device Role / Timing Role: Voltage-controlled analog switch isolating signal paths while maintaining DC coupling integrity. Use Value: Low Cre (1.6 pF) preserves rise/fall time integrity up to 10 MHz, avoiding ghosting or edge distortion. |
Use Scenario: Final-stage amplification in medical or industrial closed-circuit monitors requiring ESD-tolerant, high-reliability output devices. IC Role / Device Role / Timing Role: Class-A emitter-follower buffer delivering low-output-impedance drive to coaxial video cables. Use Value: hFE ≥50 ensures stable bias point over temperature, minimizing luminance drift during extended operation. |
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 |
|---|---|---|---|
| BF622-Q | NPN complement; identical VCEO (-250 V), IC (-50 mA), and AEC-Q101 qualification but opposite polarity. | Requires inverted biasing and layout; used in complementary push-pull video output stages, not single-ended PNP configurations. | Select when designing symmetrical output drivers or needing matched NPN/PNP pairs for differential video signaling. |
| MJD2955T4G | Higher IC (-60 mA), lower VCEO (-70 V), TO-220 package; no AEC-Q101 qualification. | Lacks automotive qualification and high-voltage capability; suitable only for non-automotive, low-voltage linear regulators or power switches. | Choose only for cost-sensitive industrial applications below 70 V, where AEC-Q101 compliance and -250 V rating are unnecessary. |
Compared with BF622-Q and MJD2955T4G, the BF623-QX uniquely combines AEC-Q101 qualification, -250 V rating, and SOT89 thermal efficiency - making it the sole option for space-constrained, high-reliability automotive video output stages requiring single-device high-voltage PNP functionality.
Availability
BF623-QX is available at Aetrix Electronics and suitable for automotive display drivers, industrial video monitors, broadcast equipment video output stages, and high-voltage analog signal switching requiring stable component supply and long-term lifecycle support.
Supply support for BF623-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-performance, reliable discrete and logic devices, with leadership in automotive-qualified components and efficient manufacturing.
The BF623-QX belongs to Nexperia's AEC-Q101-qualified high-voltage bipolar transistor family, engineered specifically for robust analog signal conditioning in automotive infotainment and industrial video systems.
FAQ
What is the maximum allowable junction temperature for BF623-QX?
The absolute maximum junction temperature (Tj) is 150 °C per IEC 60134 limiting values. Operation above this threshold risks permanent degradation of hFE and increased leakage. Thermal design must ensure Tj remains ≤150 °C under worst-case ambient and power dissipation conditions, using the provided Rth(j-a) values for specific PCB layouts.
Is BF623-QX pin-compatible with any other SOT89 PNP transistors?
No documented pin-compatible alternatives exist in SOT89 with identical -250 V VCEO and AEC-Q101 qualification. Pin 1 is emitter, Pin 2 is collector, Pin 3 is base - this assignment is fixed per Nexperia's SOT89 outline and differs from some legacy SOT89 PNP devices that assign collector to Pin 1. Layout verification against Figure 5 in the official datasheet is mandatory.
Can BF623-QX be used in switching mode at 100 kHz?
Yes - with fT = 60 MHz and VCE(sat) = -800 mV at -30 mA, the device supports clean switching at 100 kHz in low-duty-cycle applications. However, switching losses increase significantly above 10 kHz due to minority-carrier storage time; gate/base drive must include active turn-off (e.g., Baker clamp or reverse-biased base resistor) to minimize fall time.
Does BF623-QX require derating at elevated ambient temperatures?
Yes - power dissipation must be linearly derated above 25 °C ambient. For example, with a 6 cm² collector pad (Rth(j-a) = 113 K/W), usable power drops to ~0.7 W at 75 °C ambient and ~0.4 W at 125 °C. Derating curves in Figure 1 of the datasheet must be applied based on actual PCB construction and airflow conditions.
BF623-QX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- TO-243AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Transistor Type:
- PNP
- Current - Collector (Ic) (Max):
- 50 mA
- Voltage - Collector Emitter Breakdown (Max):
- 250 V
- Vce Saturation (Max) @ Ib, Ic:
- 800mV @ 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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-89
BF623-QX FAQ
1.How can I place an order for BF623-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BF623-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 BF623-QX reliable?
The price and inventory of BF623-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BF623-QX is usually 5 days.
3.What payment methods are accepted for BF623-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BF623-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BF623-QX?
BF623-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BF623-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 BF623-QX?
For technical support, including BF623-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BF623-QX requirements.
6.How does Aetrix verify that BF623-QX is sourced from the original manufacturer or authorized distributors?
All BF623-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 BF623-QX meets industry standards.
7.What is the process for return or replacement of BF623-QX?
All BF623-QX units undergo pre-shipment inspection (PSI). If there is an issue with BF623-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 BF623-QX part is unused and in its original packaging.
Return procedure for BF623-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BF623-QX Tags
-
MMBT3906LT1G
onsemi
-
MMBT3904-7-F
Diodes Incorporated
-
MMBT3904LT1G
onsemi
-
MMBT3906-7-F
Diodes Incorporated
-
MMBT3904-TP
Micro Commercial Co
-
MMBT2222A-7-F
Diodes Incorporated
-
BC846BLT1G
onsemi
-
BC847B,215
Nexperia USA Inc.
-
SMMBT3904LT1G
onsemi
-
MMBT2222A-TP
Micro Commercial Co
-
MMBTA06LT1G
onsemi
-
MMBT2222ALT1G
onsemi
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
