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onsemi KSD363Y
- Part No.:
- KSD363Y
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- TO-220-3
- Datasheet:
-
KSD363Y.pdf
- Description:
- TRANS NPN 120V 6A TO-220-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,815
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Product details
Overview
KSD363Y from ON Semiconductor is an NPN epitaxial silicon transistor designed for horizontal deflection output in black-and-white TV systems, featuring VCBO = 300 V, VCEO = 120 V, IC = 6 A, PC = 40 W at TC = 25°C, and hFE = 120–240 (Y-class). It operates reliably up to TJ = 150°C in high-voltage switching applications.
For engineers reviewing the KSD363Y datasheet, pinout, applications, or equivalent options, key selection criteria include breakdown voltage margin for flyback energy handling, saturation voltage under high peak current, thermal derating behavior in TO-220 packages, and hFE classification consistency across production lots.
Technical Context
The KSD363Y is a high-voltage, medium-power NPN bipolar junction transistor optimized for horizontal deflection stage switching in CRT-based B/W television receivers. Its 300 V collector-base rating enables safe operation during flyback voltage spikes, while its 6 A continuous collector current supports high-energy line scan pulses.
Designed with epitaxial base construction, the device delivers stable DC current gain (hFE = 120–240) at IC = 1 A and VCE = 5 V, low VCE(sat) = 1 V at IC = 1 A / IB = 0.1 A, and fT = 10 MHz - sufficient for ~15.734 kHz horizontal deflection frequency with adequate switching margin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCBO | 300 V - Withstands flyback-induced collector-base stress without avalanche conduction in B/W TV horizontal output stages |
| VCEO | 120 V - Sustains full supply voltage plus transient overshoot across collector-emitter during active switching |
| IC (continuous) | 6 A - Supports peak horizontal deflection currents typical of 14–21 inch CRT yoke drive requirements |
| PC (TC = 25°C) | 40 W - Enables high-power pulse operation when mounted on heatsink; derates linearly above 25°C case temperature |
| hFE (Y-class) | 120–240 - Ensures consistent base drive efficiency and predictable gain variation across production units |
| VCE(sat) | 1 V @ IC = 1 A, IB = 0.1 A - Minimizes conduction loss and self-heating during saturated on-state in deflection switch mode |
| fT | 10 MHz - Provides adequate small-signal bandwidth for clean turn-on/turn-off transitions at 15.734 kHz fundamental |
Pinout & Package
Supplied in a through-hole TO-220 package with integral metal tab for heatsinking and electrical connection to collector. Package dimensions comply with JEDEC TO-220AB standard (15.90 mm × 10.08 mm × 4.50 mm max height).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Base) | Control input | Receives current-limited drive signal to bias transistor into saturation or cutoff; requires external base resistor for proper switching |
| 2 (Collector) | High-voltage power switch node | Connected to flyback transformer primary and HV supply rail; electrically tied to metal tab for thermal and electrical grounding |
| 3 (Emitter) | Power return path | Provides low-impedance return to ground or yoke center tap; carries full horizontal deflection current during on-state |
Key Features
| Feature | Design Value |
|---|---|
| High VCBO rating | 300 V enables robust operation under repetitive flyback voltage transients in CRT horizontal deflection circuits |
| Y-class hFE binning | Guaranteed 120–240 DC current gain ensures predictable base drive requirements and reduces design margin uncertainty |
| Low VCE(sat) | 1 V saturation voltage minimizes power dissipation during conduction, improving thermal reliability in sealed TV chassis |
| TO-220 mechanical form | Standardized footprint allows direct replacement in legacy B/W TV service and manufacturing workflows |
| Junction temperature limit | 150°C maximum TJ permits sustained operation in thermally constrained TV cabinet environments with passive cooling |
Applications
| B/W TV Horizontal Deflection Output | Monitor Horizontal Output Stage |
|---|---|
Use Scenario: Driving the primary winding of a flyback transformer in analog black-and-white television receivers to generate horizontal scanning and EHT. IC Role / Device Role / Timing Role: High-voltage, high-current switching transistor operating at 15.734 kHz with precise duty cycle control. Use Value: Delivers reliable switching with 300 V VCBO margin against flyback spikes and 6 A peak current capability for standard CRT yoke loads. | Use Scenario: Serving as the horizontal output switch in monochrome computer monitors using discrete deflection circuitry. IC Role / Device Role / Timing Role: Primary switching element in resonant horizontal deflection amplifier, synchronized to video timing signals. Use Value: Maintains stable gain (hFE = 120–240) and low saturation loss (VCE(sat) = 1 V) across unit-to-unit variation and temperature drift. |
| Legacy CRT-Based Video Projectors | Industrial CRT Display Systems |
Use Scenario: Power switching in compact CRT projector designs where space-constrained heat management is critical. IC Role / Device Role / Timing Role: Horizontal scan driver delivering pulsed current to miniature deflection yokes at fixed 15.625–15.734 kHz rates. Use Value: TO-220 package enables direct heatsink mounting; 40 W power dissipation supports intermittent high-duty-cycle operation. | Use Scenario: Embedded CRT instrumentation displays in test equipment, oscilloscopes, and medical imaging devices requiring long-term stability. IC Role / Device Role / Timing Role: Line-scan switch ensuring repeatable beam positioning and minimal waveform distortion over extended operational life. Use Value: 150°C junction rating and -55°C to +150°C storage range support deployment in wide-temperature industrial 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 |
|---|---|---|---|
| 2SC5200 | Higher VCEO (230 V), lower hFE (80–160), same TO-220 package but different pinout (1=E, 2=C, 3=B) | Used in audio amplifiers and general-purpose HV switching; not binned for TV deflection gain consistency | Select only if redesigning base drive and layout; not drop-in due to reversed pinout and unclassified hFE |
| KSC2690Y | Same manufacturer, same Y-class hFE (120–240), lower VCBO (200 V), lower IC (3 A), TO-220F variant with insulated tab | Targeted at lower-power deflection or auxiliary switching; insufficient flyback margin for full-size B/W TV use | Acceptable for compact or low-voltage CRT designs; verify VCBO derating and thermal limits before substitution |
Compared with 2SC5200 and KSC2690Y, the KSD363Y uniquely combines 300 V VCBO, 6 A current rating, Y-class hFE binning, and TO-220 pinout (1=B, 2=C, 3=E) optimized specifically for B/W TV horizontal deflection - making it irreplaceable in legacy repair and exact-form-fit manufacturing without circuit or layout revision.
Availability
KSD363Y is available at Aetrix Electronics and suitable for B/W TV repair, CRT monitor refurbishment, and industrial display system maintenance requiring stable component supply and long-lifecycle support.
Supply support for KSD363Y 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 is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and communication markets.
The KSD363Y belongs to Fairchild's legacy high-voltage bipolar transistor product line, originally developed for analog CRT television deflection systems and maintained for backward compatibility in service and industrial applications.
FAQ
What is the pin configuration of the KSD363Y?
The KSD363Y uses a standard TO-220 package with pinout: Pin 1 = Base, Pin 2 = Collector (connected to metal tab), Pin 3 = Emitter. This configuration is confirmed in the official Fairchild datasheet Rev. A (February 2000) and matches ON Semiconductor's post-integration documentation for the KSD363Y.
What does the 'Y' suffix indicate in KSD363Y?
The 'Y' suffix denotes the hFE classification bin: KSD363Y guarantees DC current gain between 120 and 240 at VCE = 5 V and IC = 1 A. This binning ensures consistent base drive requirements in horizontal deflection circuits, distinguishing it from KSD363R (40–80) and KSD363O (70–140).
Can KSD363Y replace KSD363 in existing designs?
Yes - KSD363Y is a direct replacement for KSD363 within the same hFE bin family. Both share identical absolute maximum ratings, electrical characteristics, TO-220 package, and pinout. The 'Y' suffix explicitly identifies the high-gain variant; no layout or schematic changes are needed when substituting KSD363Y for KSD363Y-designated circuits.
Is KSD363Y suitable for modern switching power supplies?
No - the KSD363Y is optimized for 15.734 kHz horizontal deflection, not high-frequency SMPS operation. Its 10 MHz fT and relatively high VCE(sat) make it inefficient above ~50 kHz. Modern supplies require faster, lower-loss MOSFETs or RF-optimized BJTs; KSD363Y remains appropriate only for legacy CRT deflection and low-frequency HV switching.
What thermal considerations apply to KSD363Y in continuous operation?
KSD363Y has a 40 W power dissipation rating at TC = 25°C, derating linearly to zero at TC = 150°C. In real-world B/W TV use, it operates in pulsed mode - average power is low, but peak junction temperature must stay ≤150°C. A minimum 25 cm² aluminum heatsink (1 mm thick) is recommended for sustained 6 A peak current in enclosed chassis.
KSD363Y 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:
- 120 @ 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
KSD363Y FAQ
1.How can I place an order for KSD363Y through Aetrix?
Please submit a Request for Quotation (RFQ) for KSD363Y 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 KSD363Y reliable?
The price and inventory of KSD363Y are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for KSD363Y is usually 5 days.
3.What payment methods are accepted for KSD363Y?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for KSD363Y transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for KSD363Y?
KSD363Y orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your KSD363Y 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 KSD363Y?
For technical support, including KSD363Y datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your KSD363Y requirements.
6.How does Aetrix verify that KSD363Y is sourced from the original manufacturer or authorized distributors?
All KSD363Y 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 KSD363Y meets industry standards.
7.What is the process for return or replacement of KSD363Y?
All KSD363Y units undergo pre-shipment inspection (PSI). If there is an issue with KSD363Y, 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 KSD363Y part is unused and in its original packaging.
Return procedure for KSD363Y:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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