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onsemi KSD363R
- Part No.:
- KSD363R
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- TO-220-3
- Datasheet:
-
KSD363R.pdf
- Description:
- TRANS NPN 120V 6A TO-220-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,555
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Product details
Overview
KSD363R from ON Semiconductor is an NPN epitaxial silicon transistor designed for horizontal deflection output in black-and-white TV applications, featuring VCBO = 300 V, IC = 6 A, PC = 40 W (at TC = 25°C), hFE = 40–80 (R-class), and TO-220 package with base-collector-emitter pinout.
For engineers reviewing the KSD363R datasheet, pinout, applications, or equivalent options, this page delivers verified absolute maximum ratings, DC gain classification, saturation voltages, fT = 10 MHz, and safe operating area data specific to B/W TV horizontal deflection circuits.
Technical Context
The KSD363R operates as a high-voltage, medium-power switching transistor optimized for horizontal deflection linearity and thermal stability in analog CRT television systems. Its 300 V VCBO and 120 V VCEO support flyback energy recovery, while 1 V VCE(sat) at IC = 1 A / IB = 0.1 A ensures low conduction loss during active sweep periods.
Designed for fixed-bias or self-bias horizontal output stages, the device exhibits fT = 10 MHz at VCE = 5 V / IC = 0.5 A and Cob ≈ 100 pF at VCB = 10 V, enabling stable switching up to ~15.734 kHz line frequency with minimal phase distortion and collector capacitance-induced timing shift.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCBO | 300 V - Withstands flyback voltage spikes in B/W TV horizontal deflection without breakdown |
| VCEO | 120 V - Sustains collector-emitter voltage under active switching in standard deflection circuits |
| IC | 6 A - Supports peak horizontal sweep current required for CRT yoke drive |
| PC (TC=25°C) | 40 W - Enables continuous power dissipation with external heatsinking in compact chassis |
| hFE (R-class) | 40–80 - Provides predictable DC gain for stable biasing in fixed-gain horizontal output stages |
| VCE(sat) | 1 V @ IC=1A/IB=0.1A - Minimizes conduction loss and junction heating during on-state |
| fT | 10 MHz @ VCE=5V/IC=0.5A - Ensures adequate small-signal bandwidth for line-frequency fidelity |
Pinout & Package
Package: TO-220 (3-lead, straight lead, insulated tab). Dimensions per Fairchild Rev. A: 15.90 mm × 10.08 mm × 18.95 mm max; mounting hole ø3.60 mm; lead pitch 2.54 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Left) | Base | Control input for forward-biased switching; requires ~0.1 A drive current for full saturation |
| 2 (Center) | Collector | Main high-voltage, high-current output node connected to CRT yoke and flyback transformer primary |
| 3 (Right) | Emitter | Low-side return path; tied to ground or damper diode cathode in standard deflection topology |
Key Features
| Feature | Design Value |
|---|---|
| High VCBO rating | 300 V enables robust operation across CRT flyback voltage transients without secondary breakdown |
| R-class hFE binning | 40–80 gain range ensures consistent bias point selection and thermal tracking in production TVs |
| Low VCE(sat) | 1 V saturation voltage reduces power loss and junction temperature rise during 52 μs active sweep |
| TO-220 mechanical form | Standardized heatsink-mountable package supports field-replaceable service design in consumer TV chassis |
Applications
| TV Horizontal Deflection Output | Monitor Flyback Driver |
|---|---|
Use Scenario: Driving CRT horizontal deflection yoke in monochrome television receivers with 15.625 kHz line frequency. IC Role / Device Role / Timing Role: Main switching transistor in self-oscillating or synchronized horizontal output stage; handles flyback energy recovery and yoke current ramp. Use Value: 300 V VCBO withstands flyback spikes; 6 A IC supports yoke inductance current peaks; TO-220 allows direct heatsink mounting for sustained duty cycle. | Use Scenario: Generating high-voltage flyback pulses for monochrome monitor CRT anode supply and focus grid regulation. IC Role / Device Role / Timing Role: Primary-side switch in flyback converter topology; timed by horizontal sync signal to synchronize HV generation with scan timing. Use Value: 120 V VCEO safely clamps reflected flyback voltage; 10 MHz fT ensures clean edge transition for precise HV pulse width control. |
| Video Amplifier Output Stage | Legacy Industrial Sweep Generator |
Use Scenario: Final video output buffer in analog B/W video signal chain driving 75 Ω coaxial distribution lines. IC Role / Device Role / Timing Role: Class-A/B linear amplifier transistor delivering 1–2 Vpp video swing into resistive load with minimal distortion. Use Value: 40–80 hFE provides stable open-loop gain; 1 V VCE(sat) maintains headroom for negative sync tip swing without clipping. | Use Scenario: Line-time sweep generator in legacy test equipment (e.g., oscilloscope timebase, waveform analyzers). IC Role / Device Role / Timing Role: High-linearity sawtooth current source driving magnetic deflection coils with precise ramp linearity. Use Value: Low Cob (~100 pF) minimizes capacitive loading on ramp capacitor; TO-220 thermal mass stabilizes sweep timing over ambient drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN high-voltage switching transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 2SC5200 | Higher IC (15 A), higher PC (150 W), lower hFE (80–160), same TO-3P package | Designed for audio power amplification; not optimized for 15.6 kHz switching linearity or flyback SOA | Select only if higher current/power margin is needed and PCB layout accommodates larger TO-3P footprint |
| KSC2690 | Lower VCBO (200 V), same hFE R-bin (40–80), TO-220 package, fT = 8 MHz | Targeted at general-purpose switching; lacks flyback SOA validation and B/W TV qualification history | Acceptable for non-critical 100–120 V deflection circuits where 300 V margin is unnecessary |
Compared with 2SC5200 and KSC2690, the KSD363R offers purpose-built 300 V flyback tolerance, validated horizontal deflection SOA, and R-class hFE binning-making it the preferred choice for legacy B/W TV repair and CRT-based industrial sweep systems requiring proven reliability at line frequency.
Availability
KSD363R is available at Aetrix Electronics and suitable for CRT television repair, analog monitor flyback circuits, legacy video amplifier output stages, and industrial sweep generator designs requiring stable component supply with long-lifecycle support.
Supply support for KSD363R 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 high-performance silicon solutions for automotive, industrial, cloud computing, and sensing applications.
The KSD363R belongs to Fairchild's legacy high-voltage bipolar transistor product line, specifically engineered for analog CRT horizontal deflection and flyback power conversion in broadcast and consumer display equipment.
FAQ
What is the hFE range for KSD363R?
The KSD363R is binned as "R-class" with a confirmed DC current gain (hFE) range of 40 to 80 at VCE = 5 V and IC = 1 A. This tightly controlled gain bin ensures consistent biasing and thermal behavior in production B/W TV horizontal output stages. The hFE specification is explicitly defined in the Fairchild KSD363 datasheet Rev. A and applies directly to the KSD363R variant.
Does KSD363R have a built-in damper diode?
No, the KSD363R is a discrete NPN bipolar transistor without any integrated damper diode. In typical B/W TV horizontal deflection circuits, an external ultrafast damper diode (e.g., BY228 or UF4007) is connected across the collector-emitter terminals to clamp flyback voltage and protect the KSD363R. This configuration is documented in the KSD363 application diagrams and SOA curves.
What is the maximum safe operating temperature for KSD363R?
The KSD363R has a maximum junction temperature (TJ) rating of 150°C and a storage temperature range of −55°C to +150°C. For reliable long-term operation, case temperature (TC) must be limited per the derating curve: power dissipation drops linearly from 40 W at 25°C to 0 W at 125°C. Proper heatsinking is mandatory when operating above 25°C ambient in horizontal deflection applications.
Can KSD363R replace KSD363 in existing designs?
Yes, KSD363R is the R-class hFE variant of the KSD363 family and is fully interchangeable with other KSD363 suffixes (e.g., KSD363O, KSD363Y) in terms of pinout, package, and absolute maximum ratings. The only difference is the hFE bin: R = 40–80, O = 70–140, Y = 120–240. Circuit biasing may require minor adjustment if substituting between bins, but the KSD363R itself is a direct functional replacement.
Is KSD363R RoHS compliant?
The KSD363R was originally manufactured by Fairchild Semiconductor prior to the 2016 ON Semiconductor acquisition and predates mandatory RoHS enforcement for legacy discretes. It is not RoHS-compliant per EU Directive 2011/65/EU due to lead content in the solderable leads and internal construction. For new designs requiring RoHS compliance, consult ON Semiconductor's modern alternatives such as the NSS series or contact Aetrix Electronics for qualified drop-in replacements.
KSD363R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-220-3
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Transistor Type:
- NPN
- Current - Collector (Ic) (Max):
- 6 A
- Voltage - Collector Emitter Breakdown (Max):
- 120 V
- Vce Saturation (Max) @ Ib, Ic:
- 1V @ 100mA, 1A
- Current - Collector Cutoff (Max):
- 1mA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 40 @ 1A, 5V
- Power - Max:
- 40 W
- Frequency - Transition:
- 10MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220-3
KSD363R FAQ
1.How can I place an order for KSD363R through Aetrix?
Please submit a Request for Quotation (RFQ) for KSD363R 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 KSD363R reliable?
The price and inventory of KSD363R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for KSD363R is usually 5 days.
3.What payment methods are accepted for KSD363R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for KSD363R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for KSD363R?
KSD363R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your KSD363R 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 KSD363R?
For technical support, including KSD363R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your KSD363R requirements.
6.How does Aetrix verify that KSD363R is sourced from the original manufacturer or authorized distributors?
All KSD363R 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 KSD363R meets industry standards.
7.What is the process for return or replacement of KSD363R?
All KSD363R units undergo pre-shipment inspection (PSI). If there is an issue with KSD363R, 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 KSD363R part is unused and in its original packaging.
Return procedure for KSD363R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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