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onsemi KSC388CYTA
- Part No.:
- KSC388CYTA
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Datasheet:
-
KSC388CYTA.pdf
- Description:
- TRANS NPN 25V 0.05A TO-92-3
- Quantity:
- Payment:
- Shipping:
Inventory:6,915
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Product details
Overview
KSC388CYTA from ON Semiconductor (formerly Fairchild) is an NPN epitaxial silicon transistor optimized for TV final picture IF amplifier stages, featuring a typical power gain (GPE) of 33 dB at 45 MHz, fT of 300 MHz, and VCEO = 25 V. It uses a TO-92 3L package with center-collector pinout (Emitter–Collector–Base).
For engineers reviewing the KSC388CYTA datasheet, pinout, applications, or equivalent options, key selection criteria include its high-frequency small-signal amplification capability, low saturation voltages (VCE(sat) = 0.2 V), and thermal performance (RθJA = 416 °C/W) in cost-sensitive analog video signal paths.
Technical Context
The KSC388CYTA is a high-fT, medium-voltage NPN RF transistor designed for narrowband small-signal amplification in analog video IF stages. Its GPE specification (28–36 dB at 45 MHz) and Cob = 0.8–2 pF reflect tuning for stable gain in 40–50 MHz band applications with minimal parasitic capacitance.
It operates with DC bias conditions defined by VCE = 12.5 V and IC = 12.5 mA per typical characterization, delivering hFE = 20–200 and Cc·rbb′ = 25 ps - indicating optimized base resistance and junction capacitance for high-speed switching and amplification without oscillation risk in properly terminated circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 25 V - supports operation in TV IF supply rails up to ±12 V with margin against transients |
| fT | 300 MHz - enables stable small-signal amplification through 45 MHz IF band with headroom |
| GPE | 33 dB (typ) @ 45 MHz - delivers usable power gain in single-stage IF amplifiers without neutralization |
| VCE(sat) | 0.2 V @ IC = 15 mA - minimizes voltage drop and power loss in active-load configurations |
| Cob | 0.8–2 pF @ VCB = 10 V - low output capacitance reduces loading on tuned collector circuits |
| RθJA | 416 °C/W - defines thermal derating limit (2.4 mW/°C above 25°C) for TO-92 mounting on FR-4 PCB |
Pinout & Package
Package: TO-92 3L, molded plastic case with straight or bent leads; marked "C388" on top surface; center-collector configuration (Suffix "Y" indicates center collector).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Emitter | Current sink node; connected to ground or emitter degeneration resistor in common-emitter IF amps |
| 2 | Collector | Output node; interfaces with parallel LC tank or SAW filter in IF selectivity networks |
| 3 | Base | Input control node; biased via resistive divider or RF choke for stable DC operating point |
Key Features
| Feature | Design Value |
|---|---|
| High-frequency gain stability | GPE = 33 dB at 45 MHz with <3 dB variation across production lot - ensures consistent IF stage gain without per-unit tuning |
| Low-output capacitance | Cob = 0.8–2 pF - preserves Q-factor of external resonant circuits and avoids frequency pulling |
| Center-collector TO-92 | Pinout: E–C–B - simplifies PCB layout symmetry and thermal coupling in dual-transistor IF pairs |
| Robust breakdown ratings | VCBO = 30 V, VCEO = 25 V - withstands transient overvoltage in CRT TV deflection-derived supplies |
Applications
| TV Final Picture IF Amplifier | Video Signal Booster Stage |
|---|---|
Use Scenario: Amplifying 45 MHz intermediate frequency signal after SAW filter in analog CRT television receivers. IC Role / Device Role / Timing Role: Small-signal NPN amplifier in common-emitter configuration with tuned collector load. Use Value: Delivers 33 dB power gain with minimal distortion and stable phase response across temperature for accurate luminance/chrominance separation. | Use Scenario: Boosting composite video signal amplitude prior to sync stripper or RGB driver circuitry. IC Role / Device Role / Timing Role: Linear voltage amplifier with emitter degeneration for wideband flat response (DC–6 MHz). Use Value: Low VCE(sat) (0.2 V) and high hFE (20–200) enable clean signal swing with minimal DC offset shift under varying load conditions. |
| RF Modulator Output Driver | Analog Video Distribution Amplifier |
Use Scenario: Driving low-impedance coaxial cable from RF modulator IC output in set-top boxes or VCRs. IC Role / Device Role / Timing Role: Class-A buffer amplifier with impedance-matching emitter follower or common-emitter stage. Use Value: fT = 300 MHz and Cc·rbb′ = 25 ps ensure faithful reproduction of harmonics up to 3rd order without roll-off or ringing. | Use Scenario: Splitting and re-amplifying baseband video signals to multiple monitors or recording devices. IC Role / Device Role / Timing Role: Unity-gain or fixed-gain video buffer with low output impedance and high slew rate. Use Value: RθJA = 416 °C/W and PD = 300 mW allow continuous operation in multi-channel modules without forced cooling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN RF amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 2SC3356 | fT = 6.5 GHz, Cob ≈ 0.7 pF, VCEO = 12 V - higher speed but lower voltage rating | Suitable for UHF/VHF front-end LNA; not recommended for 25 V IF supply rails | Select only if operating frequency exceeds 100 MHz and supply voltage ≤12 V |
| BC550C | hFE = 420–800, fT = 300 MHz, VCEO = 45 V - higher gain and breakdown, but GPE uncharacterized at 45 MHz | Better for general-purpose audio/low-speed switching; lacks verified IF gain data | Prefer when DC gain and voltage margin are prioritized over calibrated 45 MHz power gain |
Compared with 2SC3356 and BC550C, the KSC388CYTA uniquely balances 45 MHz IF gain (33 dB), 25 V ruggedness, and TO-92 manufacturability - making it a purpose-fit replacement in legacy CRT and analog video designs where GPE and thermal behavior are validated.
Availability
KSC388CYTA is available at Aetrix Electronics and suitable for analog video IF amplification, CRT television repair, and legacy broadcast equipment requiring stable component supply and long-lifecycle support.
Supply support for KSC388CYTA 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
ON Semiconductor (formerly Fairchild Semiconductor) is a global supplier of energy-efficient semiconductor components, specializing in power management, analog, and discrete devices for automotive, industrial, and consumer markets.
The KSC388CYTA belongs to ON Semiconductor's legacy RF transistor product line, originally developed for analog video signal chain applications including TV IF amplification, video distribution, and RF modulation stages.
FAQ
What is the pin configuration of the KSC388CYTA?
The KSC388CYTA uses a TO-92 3L package with center-collector pinout: Pin 1 = Emitter, Pin 2 = Collector, Pin 3 = Base. The "Y" suffix explicitly denotes this center-collector arrangement, distinguishing it from side-collector variants like KSC388.
Does the KSC388CYTA support operation at 45 MHz with stable gain?
Yes, the KSC388CYTA is characterized for GPE = 28–36 dB (typical 33 dB) at 45 MHz under standard test conditions (VCE = 12.5 V, IC = 12.5 mA). This makes it suitable for final picture IF amplification in analog TV systems where consistent mid-band gain is required.
What is the maximum power dissipation of the KSC388CYTA?
The KSC388CYTA has a rated power dissipation of 300 mW at TA = 25°C, with a thermal derating factor of 2.4 mW/°C above that temperature. Its RθJA is 416 °C/W on a standard FR-4 PCB, defining safe operating area limits for continuous use.
Can the KSC388CYTA replace the KSC388 without layout changes?
Yes - the KSC388CYTA shares identical TO-92 3L packaging and center-collector pinout with the base KSC388. No PCB modifications are needed; both parts use the same E–C–B pin assignment and thermal footprint.
Is the KSC388CYTA suitable for modern digital video applications?
The KSC388CYTA was engineered for analog video IF stages (e.g., CRT TVs) and is not optimized for high-speed digital signaling or HDMI/SDI compliance. While functional in low-frequency video buffering, its specifications target legacy analog systems - verify signal integrity and bandwidth requirements before use in new digital designs.
KSC388CYTA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Packaging:
- Cut Tape (CT)
- Product Status:
- Obsolete
- Transistor Type:
- NPN
- Current - Collector (Ic) (Max):
- 50 mA
- Voltage - Collector Emitter Breakdown (Max):
- 25 V
- Vce Saturation (Max) @ Ib, Ic:
- 200mV @ 1.5mA, 15mA
- Current - Collector Cutoff (Max):
- 100nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 20 @ 12.5mA, 12.5V
- Power - Max:
- 300 mW
- Frequency - Transition:
- 300MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-92-3
KSC388CYTA FAQ
1.How can I place an order for KSC388CYTA through Aetrix?
Please submit a Request for Quotation (RFQ) for KSC388CYTA 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 KSC388CYTA reliable?
The price and inventory of KSC388CYTA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for KSC388CYTA is usually 5 days.
3.What payment methods are accepted for KSC388CYTA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for KSC388CYTA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for KSC388CYTA?
KSC388CYTA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your KSC388CYTA 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 KSC388CYTA?
For technical support, including KSC388CYTA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your KSC388CYTA requirements.
6.How does Aetrix verify that KSC388CYTA is sourced from the original manufacturer or authorized distributors?
All KSC388CYTA 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 KSC388CYTA meets industry standards.
7.What is the process for return or replacement of KSC388CYTA?
All KSC388CYTA units undergo pre-shipment inspection (PSI). If there is an issue with KSC388CYTA, 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 KSC388CYTA part is unused and in its original packaging.
Return procedure for KSC388CYTA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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