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onsemi KSD363O
- Part No.:
- KSD363O
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- TO-220-3
- Datasheet:
-
KSD363O.pdf
- Description:
- TRANS NPN 120V 6A TO-220-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
KSD363O from ON Semiconductor is an NPN epitaxial silicon transistor designed for horizontal deflection output in black-and-white TV applications, featuring VCBO = 300 V, VCEO = 120 V, IC = 6 A, PC = 40 W at TC = 25°C, and hFE = 120–240 (Y-class), operating reliably up to TJ = 150°C.
For engineers reviewing the KSD363O datasheet, pinout, applications, or equivalent options, key selection criteria include high-voltage switching capability, robust safe operating area for flyback pulse handling, thermal performance in TO-220 packages, and DC current gain consistency under 1 A collector drive conditions.
Technical Context
The KSD363O is a high-voltage, high-current NPN power transistor optimized for horizontal deflection circuits in CRT-based B/W television systems. Its design emphasizes high breakdown voltage (VCBO = 300 V), low saturation voltages (VCE(sat) = 1 V at IC = 1 A, IB = 0.1 A), and stable hFE across its Y-class range (120–240).
It operates with fT = 10 MHz at VCE = 5 V, IC = 0.5 A, supporting fast switching transitions required in line-output stages. The device's SOA curve (Figure 5) is specifically characterized for horizontal deflection output circuit conditions, including peak collector current and voltage stress profiles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCBO | 300 V - Withstands collector-base reverse bias up to 300 V, enabling use in high-voltage flyback transformer primary switching. |
| VCEO | 120 V - Sustains 120 V collector-emitter voltage under open-base conditions, matching B/W TV horizontal output stage requirements. |
| IC (max) | 6 A - Supports peak horizontal deflection currents up to 6 A without thermal runaway at TC = 25°C. |
| PC (max) | 40 W - Delivers 40 W dissipation at case temperature 25°C; derates linearly above 25°C per Figure 6. |
| hFE (Y-class) | 120–240 - Ensures predictable base drive scaling and consistent switching timing in line-output amplifier designs. |
| VCE(sat) | 1 V - Minimizes conduction loss during saturation, critical for efficiency and thermal management in repetitive pulse operation. |
| fT | 10 MHz - Enables reliable switching at horizontal scan frequencies (~15.625 kHz) with sufficient bandwidth margin. |
Pinout & Package
Package: TO-220 (3-lead, straight lead form, insulated tab). Dimensions conform to JEDEC TO-220 standard; mounting hole centered at 9.20 mm from bottom edge, lead pitch 2.54 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Base) | Control input | Receives base current to drive transistor into saturation or cutoff; requires ~0.1 A for full turn-on at IC = 1 A. |
| 2 (Collector) | High-voltage switch node | Connected to flyback transformer primary; handles 300 V reverse bias and 6 A pulsed current. |
| 3 (Emitter) | Power return path | Low-impedance emitter connection; referenced to ground or damper diode cathode in B/W TV horizontal output stage. |
Key Features
| Feature | Design Value |
|---|---|
| High VCBO rating | 300 V enables direct replacement in legacy B/W TV horizontal output circuits without snubber redesign. |
| Y-class hFE binning | 120–240 range ensures tight base drive tolerance and consistent pulse width control across production lots. |
| TO-220 mechanical robustness | Insulated tab and standardized footprint support secure heatsinking and mechanical stability in high-vibration TV chassis. |
| SOA-optimized construction | Safe Operating Area validated per Figure 5 for horizontal deflection waveforms, including peak current/voltage stress limits. |
Applications
| B/W TV Horizontal Deflection Output | Monitor Line Output Stage |
|---|---|
Use Scenario: Driving flyback transformer primary in analog black-and-white television receivers to generate high-voltage EHT and horizontal scanning pulses. IC Role / Device Role / Timing Role: Main switching transistor in self-oscillating or externally synchronized horizontal output stage; conducts for ~52 µs per line period. Use Value: High VCBO and SOA-rated operation ensure reliability under repetitive 300 V collector spikes and 6 A peak current transients. | Use Scenario: Switching element in monochrome or early color computer monitor horizontal deflection circuits requiring stable line frequency operation. IC Role / Device Role / Timing Role: Power switch controlling energy transfer to line output transformer; synchronized to 15.625 kHz horizontal sync signal. Use Value: Low VCE(sat) and controlled hFE reduce conduction losses and improve thermal stability during continuous duty cycling. |
| Legacy CRT Display Repair | Industrial CRT-Based Instrumentation |
Use Scenario: Replacement component for field repair of discontinued B/W TVs where original KSD363-series transistors have failed. IC Role / Device Role / Timing Role: Drop-in functional replacement for KSD363 variants in existing PCB layouts using TO-220 footprint. Use Value: Identical pinout, package, and electrical specs enable zero-modification board-level substitution. | Use Scenario: Horizontal sweep generator in oscilloscopes, radar displays, or medical imaging CRT subsystems requiring long-term component availability. IC Role / Device Role / Timing Role: High-reliability line output switch sustaining repetitive high-voltage pulses over extended operational lifetimes. Use Value: 150°C junction rating and proven SOA performance support continuous operation in sealed, thermally constrained enclosures. |
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 |
|---|---|---|---|
| MJD363T4G | Same die, TO-220F package (full-pack molded, non-insulated tab); slightly lower PC = 35 W at TC = 25°C. | Requires insulating washer if mounting to grounded heatsink; otherwise identical B/W TV line output use. | Select when cost or supply chain favors ON Semi's molded variant and thermal design accommodates 5 W lower dissipation. |
| 2SC5200 | Higher fT = 30 MHz, higher VCEO = 230 V, but lower hFE min = 80; TO-3P package, larger footprint. | Used in audio amplifiers and some color TV horizontal stages; not pin-compatible and requires PCB layout change. | Consider only for new designs needing broader bandwidth or higher VCEO, accepting mechanical redesign and drive adjustment. |
Compared with MJD363T4G and 2SC5200, the KSD363O offers optimal balance of insulation-ready TO-220 packaging, Y-class hFE consistency, and SOA validation for legacy B/W TV service - making it the preferred choice for direct replacement without thermal or layout compromise.
Availability
KSD363O is available at Aetrix Electronics and suitable for B/W TV repair, CRT monitor refurbishment, and industrial instrumentation requiring stable component supply with long-lifecycle support and traceable sourcing.
Supply support for KSD363O 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 semiconductor manufacturer specializing in power management, analog, sensor, and discrete solutions for automotive, industrial, and consumer markets.
The KSD363O belongs to ON Semiconductor's legacy high-voltage bipolar transistor product line, originally developed for CRT display horizontal deflection and engineered for rugged, high-reliability operation in thermally demanding analog video systems.
FAQ
What is the pin configuration of the KSD363O?
The KSD363O uses a standard TO-220 package with 1-Base, 2-Collector, 3-Emitter pinout (viewed from front with leads down and tab facing away). This matches JEDEC TO-220 outline and is identical to the original Fairchild KSD363 specification. No alternate pinouts exist for this part number.
Is the KSD363O RoHS compliant?
Yes, the KSD363O is RoHS compliant per ON Semiconductor's current product specifications. It meets EU Directive 2011/65/EU and subsequent amendments, with lead-free terminations and halogen-free molding compound. Compliance documentation is available via ON Semiconductor's website under product environmental reports.
Does the KSD363O require a heatsink in typical B/W TV applications?
Yes, the KSD363O must be mounted on a heatsink in all operational applications. At 6 A peak current and 40 W maximum dissipation, thermal resistance from junction to case is ~0.625°C/W; without heatsinking, junction temperature exceeds 150°C within milliseconds. Standard aluminum heatsinks ≥150 cm² are recommended for continuous line-output duty.
What does the "O" suffix in KSD363O indicate?
The "O" suffix in KSD363O denotes the Y-class hFE bin (120–240), per Fairchild/ON Semiconductor's internal classification system. It is not a revision code or packaging variant - KSD363O, KSD363R, and KSD363Y differ only in DC current gain range, sharing identical absolute maximum ratings, SOA, and package.
Can the KSD363O be used in color TV horizontal output stages?
The KSD363O is not recommended for modern color TV horizontal output stages due to insufficient VCEO (120 V) versus typical color TV requirements (≥150 V). While it may function in some low-stress legacy color sets, ON Semiconductor specifies it explicitly for B/W TV horizontal deflection - use only where VCEO and SOA match the target circuit's waveform envelope.
KSD363O 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:
- 70 @ 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
KSD363O FAQ
1.How can I place an order for KSD363O through Aetrix?
Please submit a Request for Quotation (RFQ) for KSD363O 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 KSD363O reliable?
The price and inventory of KSD363O are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for KSD363O is usually 5 days.
3.What payment methods are accepted for KSD363O?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for KSD363O transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for KSD363O?
KSD363O orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your KSD363O 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 KSD363O?
For technical support, including KSD363O datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your KSD363O requirements.
6.How does Aetrix verify that KSD363O is sourced from the original manufacturer or authorized distributors?
All KSD363O 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 KSD363O meets industry standards.
7.What is the process for return or replacement of KSD363O?
All KSD363O units undergo pre-shipment inspection (PSI). If there is an issue with KSD363O, 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 KSD363O part is unused and in its original packaging.
Return procedure for KSD363O:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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