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NXP Semiconductors BF423,116
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- Part No.:
- BF423,116
- Manufacturer:
- NXP Semiconductors
- Category:
- Single Bipolar Transistors
- Package:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Datasheet:
-
BF423,116.pdf
- Description:
- TRANS PNP 250V 0.05A TO-92-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,794
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Product details
Overview
BF423,116 from NXP Semiconductors (formerly Philips) is a PNP high-voltage transistor in TO-92 plastic package, rated for −250 V collector-base voltage (VCBO), −250 V collector-emitter voltage (VCEO), and 830 mW total power dissipation at Tamb ≤ 25 °C; it delivers DC current gain (hFE) ≥ 50 at VCE = −20 V and IC = −25 mA, with low 1.6 pF feedback capacitance (Cre), and is used in class-B video output stages of colour television and professional monitor equipment.
For engineers reviewing the BF423,116 datasheet, BF423,116 pinout, BF423,116 application, or BF423,116 equivalent, key selection criteria include verified high-voltage PNP switching capability, thermal resistance (Rth(j-a) = 150 K/W), peak collector current rating (−100 mA), and compatibility with through-hole PCB assembly in legacy video signal path designs.
Technical Context
The BF423,116 operates as a high-voltage PNP bipolar junction transistor optimized for linear amplification in high-swing video output circuits. Its design emphasizes low feedback capacitance (Cre ≤ 1.6 pF) and stable DC current gain (hFE ≥ 50) under −20 V VCE and −25 mA IC conditions, enabling minimal signal distortion in class-B push-pull configurations.
It supports operation up to 150 °C junction temperature (Tj), with limiting values defined per IEC 60134, including −5 V emitter-base voltage (VEBO) and −50 nA collector-base cut-off current (ICBO) at −200 V VCB and 25 °C - confirming suitability for stable biasing in high-impedance video driver nodes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCBO | −250 V: maximum reverse voltage sustainable between collector and base with emitter open - critical for high-voltage video stage isolation |
| VCEO | −250 V: maximum reverse voltage between collector and emitter with base open - defines safe operating voltage swing in output amplifier rails |
| hFE | ≥ 50 at VCE = −20 V, IC = −25 mA: ensures predictable current amplification in linear video driver bias networks |
| Cre | ≤ 1.6 pF at VCE = −30 V, f = 1 MHz: minimizes Miller-effect phase shift and bandwidth degradation in wideband video amplifiers |
| Ptot | 830 mW at Tamb ≤ 25 °C: sets thermal derating boundary for continuous operation on standard FR-4 PCB without heatsink |
| fT | ≥ 60 MHz at VCE = −10 V, IC = −10 mA: confirms sufficient small-signal gain-bandwidth for composite video (≈5 MHz) and sync pulse fidelity |
| Rth(j-a) | 150 K/W: quantifies thermal bottleneck from junction to ambient - requires layout attention for sustained >300 mW dissipation |
Pinout & Package
BF423,116 is housed in a plastic single-ended leaded (through-hole) TO-92 package (SOT54/SC-43A), with 3 leads and standardized mechanical dimensions per IEC/JEDEC outlines: body length 14.5 mm, lead spacing (e) 2.54 mm, and lead pitch (e1) 1.27 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base | Control electrode for forward-biased PNP operation; requires negative bias relative to emitter to enable conduction |
| 2 | Collector | High-voltage output node; connected to negative rail in class-B video output stage; sustains −250 V reverse bias |
| 3 | Emitter | Common reference terminal; typically tied to ground or positive supply in PNP configuration; must withstand −5 V reverse VEB |
Key Features
| Feature | Design Value |
|---|---|
| High-voltage PNP structure | Rated for −250 V VCBO/VCEO - enables direct interface with CRT anode drive and deflection circuitry without external level-shifting |
| Low feedback capacitance | Cre ≤ 1.6 pF - reduces high-frequency instability and improves transient response in video amplifier feedback loops |
| Stable DC current gain | hFE ≥ 50 at −20 V VCE and −25 mA IC - ensures consistent bias point across unit-to-unit and temperature variation |
| Through-hole TO-92 package | SOT54 outline with 2.54 mm lead pitch - supports manual rework, legacy test fixtures, and high-reliability industrial video equipment assembly |
Applications
| Colour Television Video Output | Professional Monitor Driver |
|---|---|
Use Scenario: Final-stage amplification of composite video signal driving CRT cathode or grid in broadcast-grade TV receivers. IC Role / Device Role / Timing Role: PNP high-voltage switch/amplifier in class-B push-pull pair, handling peak inverse voltages up to −250 V during blanking intervals. Use Value: Low Cre (1.6 pF) preserves rise/fall time integrity of sync pulses and luminance transitions; hFE ≥ 50 ensures stable quiescent current in thermal drift-prone chassis environments. | Use Scenario: Driving high-impedance video load (e.g., 75 Ω terminated line + CRT input capacitance) in medical or broadcast monitoring systems. IC Role / Device Role / Timing Role: Linear output device in DC-coupled video amplifier chain, delivering full-swing analog video with minimal overshoot. Use Value: 60 MHz fT and controlled VCEsat (≤ −0.6 V) maintain flat frequency response to 5 MHz and reduce differential gain/phase errors in multi-channel RGB paths. |
| Legacy Broadcast Equipment Repair | Industrial Video Signal Conditioning |
Use Scenario: Replacement component in field-serviceable NTSC/PAL video processing modules where original BF423 stock is depleted. IC Role / Device Role / Timing Role: Drop-in PNP transistor maintaining identical pinout, voltage rating, and thermal profile in decades-old PCB layouts. Use Value: TO-92 SOT54 footprint and 150 K/W Rth(j-a) allow direct substitution without board modification or thermal redesign. | Use Scenario: Amplifying and buffering analog video signals in ruggedized machine vision or process control displays exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: High-reliability PNP buffer isolating sensitive DAC outputs from long coaxial cable runs. Use Value: Tj = 150 °C rating and ICBO ≤ −10 nA at 25 °C ensure stable DC offset over −40 °C to +85 °C industrial operating range. |
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 |
|---|---|---|---|
| BF421,116 | Higher VCBO/VCEO (−300 V vs −250 V); otherwise identical pinout, package, and hFE/fT specs | Better suited for designs requiring extra voltage margin in CRT anode supply coupling or flyback transformer interfaces | Select BF421,116 only if system-level stress analysis confirms need for >−250 V rating; BF423,116 remains optimal for cost-sensitive, volume-replacement use cases |
| BC639 | Lower VCBO (−100 V), higher ICM (−1 A), TO-92 package but different pinout (E-B-C vs B-C-E) | Not suitable for high-voltage video output; appropriate only for general-purpose medium-voltage switching or driver stages | BC639 is not a functional substitute for BF423,116 due to voltage and pinout mismatch - verify schematic integration before considering |
Compared with BF421,116 and BC639, the BF423,116 uniquely balances −250 V rating, 1.6 pF Cre, and TO-92 B-C-E pinout for legacy video output repair and design continuity - neither alternative matches its exact high-voltage linearity + low-capacitance combination in this footprint.
Availability
BF423,116 is available at Aetrix Electronics and suitable for colour television repair, professional monitor manufacturing, and industrial video signal conditioning requiring stable component supply and long-term obsolescence mitigation.
Supply support for BF423,116 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
NXP Semiconductors is a global semiconductor company formed from the spin-off of Philips Semiconductors in 2006, specializing in secure connectivity solutions and high-performance analog/mixed-signal components.
The BF423,116 belongs to NXP's legacy discrete transistor portfolio, originally developed for high-fidelity analog video signal path applications in broadcast and consumer electronics equipment of the 1990s–2000s era.
FAQ
What is the maximum collector-emitter voltage rating for BF423,116?
The BF423,116 has a maximum collector-emitter voltage (VCEO) rating of −250 V with the base open, as specified in the Philips/NXP datasheet under Limiting Values. This rating applies at Tamb ≤ 25 °C and is defined per IEC 60134 Absolute Maximum Ratings. Exceeding this voltage risks permanent breakdown, especially under transient conditions common in CRT video output stages.
Does BF423,116 have the same pinout as BF421,116?
Yes, the BF423,116 shares identical pinout (Base–Collector–Emitter, Pin 1–2–3) and TO-92 package (SOT54) with BF421,116. Both devices follow the same handbook outline MAM285 and simplified symbol in Figure 1 of the 2004 datasheet. This allows mechanical and layout compatibility, though electrical ratings differ - BF421,116 supports −300 V while BF423,116 is rated for −250 V.
What is the thermal resistance from junction to ambient for BF423,116?
The thermal resistance from junction to ambient (Rth(j-a)) for BF423,116 is 150 K/W when mounted on a standard printed-circuit board, as stated in the Thermal Characteristics section of the datasheet. This value assumes no heatsink and defines the baseline for thermal derating: power dissipation must be reduced by 6.67 mW/°C above Tamb = 25 °C to maintain Tj ≤ 150 °C.
Can BF423,116 be used as a direct replacement for BF422 in video output circuits?
No - BF423,116 is a PNP transistor, while BF422 is its NPN complement. They are designed for complementary push-pull operation, not interchangeability. Substituting BF423,116 for BF422 would invert polarity and disrupt biasing. The correct PNP match for BF422 is BF423,116; the correct NPN match for BF423,116 is BF422.
What is the typical transition frequency (fT) of BF423,116 and how is it measured?
The BF423,116 has a minimum transition frequency (fT) of 60 MHz, measured under conditions of VCE = −10 V, IC = −10 mA, and f = 100 MHz, as specified in the CHARACTERISTICS table. This fT confirms adequate small-signal gain-bandwidth for composite video signal amplification (up to 5 MHz), ensuring faithful reproduction of luminance and chrominance edges without high-frequency roll-off.
BF423,116 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Transistor Type:
- PNP
- 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:
- 830 mW
- Frequency - Transition:
- 60MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-92-3
BF423,116 FAQ
1.How can I place an order for BF423,116 through Aetrix?
Please submit a Request for Quotation (RFQ) for BF423,116 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 BF423,116 reliable?
The price and inventory of BF423,116 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BF423,116 is usually 5 days.
3.What payment methods are accepted for BF423,116?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BF423,116 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BF423,116?
BF423,116 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BF423,116 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 BF423,116?
For technical support, including BF423,116 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BF423,116 requirements.
6.How does Aetrix verify that BF423,116 is sourced from the original manufacturer or authorized distributors?
All BF423,116 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 BF423,116 meets industry standards.
7.What is the process for return or replacement of BF423,116?
All BF423,116 units undergo pre-shipment inspection (PSI). If there is an issue with BF423,116, 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 BF423,116 part is unused and in its original packaging.
Return procedure for BF423,116:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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