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onsemi KSD363OTU
- Part No.:
- KSD363OTU
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- TO-220-3
- Datasheet:
-
KSD363OTU.pdf
- Description:
- TRANS NPN 120V 6A TO-220-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,775
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Product details
Overview
KSD363OTU 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 fT = 10 MHz.
For engineers reviewing the KSD363OTU datasheet, pinout, applications, or equivalent options, key selection criteria include high-voltage switching capability (300 V CB), robust power handling (40 W), TO-220 package thermal performance, hFE classification range (40–240), and saturation voltage behavior under 1 A/0.1 A drive conditions.
Technical Context
The KSD363OTU operates as a high-voltage, medium-power NPN switching transistor optimized for horizontal deflection circuits where fast turn-on/turn-off and safe operating area (SOA) under pulsed peak current are critical. It supports collector-base breakdown up to 300 V and delivers 6 A continuous collector current with 1 V VCE(sat) at IC = 1 A, IB = 0.1 A.
Its DC current gain (hFE) is classified into R/O/Y bins (40–80 / 70–140 / 120–240), enabling design margining for gain variation across temperature and production lots. The device uses epitaxial base construction and is rated for TJ = 150°C maximum junction temperature with TO-220 mechanical mounting compatibility.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCBO | 300 V - Enables safe operation in B/W TV horizontal flyback circuits with high back-EMF spikes. |
| VCEO | 120 V - Sustains collector-emitter voltage during active switching without avalanche conduction. |
| IC (continuous) | 6 A - Supports high peak-to-average current ratios typical in deflection yoke drive applications. |
| PC (TC=25°C) | 40 W - Requires heatsinking for sustained operation; derates linearly above 25°C case temperature. |
| hFE (R-class min) | 40 - Ensures minimum base drive current of ~25 mA required for 1 A collector current in worst-case bin. |
| VCE(sat) | 1 V @ IC=1A, IB=0.1A - Limits conduction loss to ≤1 W per pulse, critical for thermal management in repetitive switching. |
| fT | 10 MHz - Supports adequate gain at horizontal scan frequencies (~15.625 kHz) with margin for transient response. |
Pinout & Package
Package: TO-220 (3-lead, straight lead, insulated tab). Mounting surface is electrically connected to collector; requires insulating washer when mounted to grounded heatsink.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Left) | Base | Current-controlled input node; requires ≥25 mA drive for full saturation under R-bin conditions. |
| 2 (Center) | Collector | Main power output terminal; electrically tied to metal tab; must be isolated from chassis if heatsink is grounded. |
| 3 (Right) | Emitter | Common return path; low-inductance connection essential to minimize switching overshoot in deflection circuits. |
Key Features
| Feature | Design Value |
|---|---|
| High VCBO rating | 300 V enables reliable operation in CRT horizontal deflection circuits with large inductive kickback. |
| TO-220 power package | Provides proven thermal interface for forced-air or passive heatsinking in consumer TV chassis layouts. |
| hFE classification bins | R/O/Y groupings allow bin-specific base drive optimization and yield-based BOM cost control. |
| Low VCE(sat) | 1 V saturation voltage minimizes conduction loss and localized heating during high-duty-cycle scanning. |
Applications
| B/W TV Horizontal Deflection Output | Monitor Flyback Power Switch |
|---|---|
Use Scenario: Driving horizontal deflection yoke in analog black-and-white television receivers requiring precise timing and high-voltage retrace pulses. IC Role / Device Role / Timing Role: Main switching transistor in line-output stage, turning on/off yoke current at 15.625 kHz with controlled rise/fall times. Use Value: 300 V VCBO withstands flyback voltage spikes exceeding 250 V; 40 W dissipation accommodates pulsed power demands without thermal runaway. | Use Scenario: High-voltage switch in compact CRT monitor flyback transformers delivering regulated HV for screen acceleration. IC Role / Device Role / Timing Role: Primary-side power switch synchronized to horizontal sync signal, operating in quasi-resonant or fixed-frequency mode. Use Value: 120 V VCEO ensures safe blocking during off-state; TO-220 package allows direct bolt-down to aluminum chassis for thermal stability. |
| Industrial CRT Display Driver | Oscilloscope Sweep Amplifier Stage |
Use Scenario: Line-scan driver in ruggedized industrial CRT displays exposed to wide ambient temperature ranges and vibration. IC Role / Device Role / Timing Role: High-current, high-voltage output stage amplifying sawtooth sweep waveform into deflection coil. Use Value: 150°C max junction temperature and -55°C to +150°C storage range support extended field reliability in uncontrolled environments. | Use Scenario: Fast-switching amplifier in analog oscilloscope timebase circuits requiring linear sweep and minimal distortion. IC Role / Device Role / Timing Role: Current-source driver for electrostatic deflection plates, operating in Class-A/AB with tight gain stability. Use Value: 10 MHz fT provides sufficient bandwidth for sub-microsecond sweep transitions; hFE consistency reduces calibration drift over time. |
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-252 (DPAK) package; lower PC = 25 W; no insulated tab. | Suitable only for lower-power or surface-mount designs; not drop-in for TO-220 heatsink mounting. | Select MJD363T4G only when board space constraints preclude TO-220 and thermal load remains ≤25 W. |
| KSC2690YTA | Higher VCEO = 160 V but lower IC = 3 A; hFE binning differs (120–240 only); same TO-220 package. | Better for higher-voltage, lower-current flyback stages; unsuitable for 6 A peak yoke drive. | Choose KSC2690YTA when circuit demands >120 V blocking but peak current stays below 3 A and SOA margins are verified. |
Compared with KSD363OTU, MJD363T4G trades thermal capacity and mounting flexibility for SMT compatibility, while KSC2690YTA increases voltage headroom at the expense of current capability-neither is pin-compatible, and both require layout and thermal redesign.
Availability
KSD363OTU is available at Aetrix Electronics and suitable for B/W TV repair, CRT monitor manufacturing, and industrial display refurbishment requiring stable component supply and long-lifecycle availability.
Supply support for KSD363OTU 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 supplier specializing in power management, analog, sensor, and discrete devices for automotive, industrial, and consumer markets.
The KSD363OTU belongs to ON Semiconductor's legacy high-voltage bipolar transistor product line, originally developed for CRT-based video display systems requiring rugged, high-energy switching performance.
FAQ
What is the maximum collector current rating for KSD363OTU?
The KSD363OTU has a continuous collector current rating of 6 A at TC = 25°C. This rating assumes proper heatsinking; actual usable current decreases with rising case temperature due to its 40 W power dissipation limit and linear derating curve shown in the datasheet's Figure 6. For pulsed operation, peak current may exceed 6 A within the Safe Operating Area boundaries defined in Figure 5.
Is KSD363OTU pin-compatible with other TO-220 NPN transistors like 2N3055?
No, KSD363OTU is not pin-compatible with 2N3055. While both use TO-220 packages, the KSD363OTU pinout is Base–Collector–Emitter (1–2–3), whereas 2N3055 is Base–Collector–Emitter in different physical order (1–2–3 corresponds to E–B–C on many 2N3055 variants). Always verify pin assignments using the official KSD363OTU datasheet before PCB layout or replacement.
Does KSD363OTU have an insulated tab?
Yes, the KSD363OTU TO-220 package features an electrically insulated metal tab connected to the collector terminal. This insulation allows direct mounting to a grounded heatsink without short-circuiting the collector, provided the insulating washer and mounting hardware are correctly applied per ON Semiconductor's mechanical recommendations.
What hFE classification does KSD363OTU carry, and how does it affect circuit design?
KSD363OTU is offered in R/O/Y hFE classifications (40–80 / 70–140 / 120–240). The classification determines minimum base drive requirements: R-bin units need ≥25 mA IB for 1 A IC, while Y-bin units may achieve the same with ≤8.3 mA. Designers must select base resistor values based on the purchased bin to ensure saturation across temperature and lifetime.
Can KSD363OTU be used in modern switch-mode power supplies?
KSD363OTU can be used in low-frequency (<50 kHz), high-voltage SMPS designs such as CRT flyback converters, but it is not optimized for high-frequency operation. Its 10 MHz fT and relatively slow switching characteristics (due to minority-carrier bipolar structure) make it less efficient than modern MOSFETs or RF BJTs above 100 kHz. For new designs, consider ON Semiconductor's newer power MOSFETs unless legacy compatibility or specific SOA behavior is required.
KSD363OTU 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
KSD363OTU FAQ
1.How can I place an order for KSD363OTU through Aetrix?
Please submit a Request for Quotation (RFQ) for KSD363OTU 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 KSD363OTU reliable?
The price and inventory of KSD363OTU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for KSD363OTU is usually 5 days.
3.What payment methods are accepted for KSD363OTU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for KSD363OTU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for KSD363OTU?
KSD363OTU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your KSD363OTU 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 KSD363OTU?
For technical support, including KSD363OTU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your KSD363OTU requirements.
6.How does Aetrix verify that KSD363OTU is sourced from the original manufacturer or authorized distributors?
All KSD363OTU 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 KSD363OTU meets industry standards.
7.What is the process for return or replacement of KSD363OTU?
All KSD363OTU units undergo pre-shipment inspection (PSI). If there is an issue with KSD363OTU, 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 KSD363OTU part is unused and in its original packaging.
Return procedure for KSD363OTU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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