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onsemi KSC2073H2
- Part No.:
- KSC2073H2
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- TO-220-3
- Datasheet:
-
KSC2073H2.pdf
- Description:
- TRANS NPN 150V 1.5A TO-220-3
- Quantity:
- Payment:
- Shipping:
Inventory:7,843
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Product details
Overview
KSC2073H2 from onsemi is an NPN epitaxial silicon power transistor designed for TV vertical deflection output stages, featuring VCBO = 150 V, VCEO = 150 V, IC = 1.5 A, PC = 25 W at TC = 25 °C, and hFE = 60–125 (H2 classification). It operates in high-voltage switching applications where robust collector-emitter blocking and controlled saturation behavior are required.
For engineers reviewing the KSC2073H2 datasheet, pinout, applications, or equivalent options, key selection criteria include its TO-220-3LD package, 150 V breakdown ratings, DC current gain classification H2, safe operating area limits, and complementary pairing with KSA940 for push-pull deflection circuits.
Technical Context
The KSC2073H2 is a medium-power, high-voltage NPN bipolar junction transistor optimized for linear and switching operation in vertical deflection output stages of CRT television systems. Its design emphasizes stable gain across 0.5 A bias (hFE = 60–125), low VCE(sat) ≤ 1 V at IC = 500 mA/IB = 50 mA, and fT = 4 MHz for adequate bandwidth in deflection timing.
Thermal performance is defined by a 25 W collector dissipation rating at TC = 25 °C, with derating to zero at TJ = 150 °C, and Cob = 50 pF at VCB = 10 V, supporting predictable switching transitions and minimal capacitive loading in driver-stage interfacing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCBO | 150 V - Maximum reverse voltage the collector-base junction withstands before breakdown; defines safe operation in high-voltage flyback and deflection circuits. |
| VCEO | 150 V - Maximum collector-emitter voltage with base open; sets upper limit for supply rail and scan coil voltage swing tolerance. |
| IC | 1.5 A - Continuous collector current capability; supports peak vertical deflection currents without thermal runaway under proper heatsinking. |
| PC (TC = 25 °C) | 25 W - Maximum power dissipation at case temperature 25 °C; requires external heatsink for sustained operation above ambient. |
| hFE (H2) | 60–125 - DC current gain range at VCE = 10 V, IC = 0.5 A; ensures consistent drive efficiency and predictable base current sizing. |
| VCE(sat) | ≤ 1 V - Collector-emitter saturation voltage at IC = 500 mA, IB = 50 mA; minimizes conduction loss and heat generation during on-state. |
| fT | 4 MHz - Current gain–bandwidth product; enables stable amplification and switching up to vertical scan frequencies with margin. |
Pinout & Package
Package: TO-220-3LD (Case 340AT), through-hole, insulated tab, 3-terminal configuration with integral heatsink mounting flange.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Left) | Base | Control terminal for forward-biased injection; requires current-limited drive (e.g., 50 mA typical for 500 mA IC) to ensure full saturation. |
| 2 (Center) | Collector | Main high-current, high-voltage output node; electrically connected to metal tab for thermal conduction and mechanical mounting. |
| 3 (Right) | Emitter | Current return path and reference node; typically grounded or connected to low-side shunt in deflection output stage. |
Key Features
| Feature | Design Value |
|---|---|
| TV vertical deflection optimized | Engineered for linearity, thermal stability, and safe operating area compliance in 50/60 Hz vertical sweep circuits with reactive loads. |
| Complementary pair with KSA940 | Enables balanced push-pull output stages when paired with PNP KSA940, reducing even-order distortion and improving efficiency. |
| Pb-Free and halide-free construction | Meets RoHS Directive 2011/65/EU and JEDEC JS709B requirements; compatible with lead-free reflow and wave soldering processes. |
| High VCBO/VCEO symmetry | 150 V rating on both collector-base and collector-emitter terminals simplifies layout and protection circuit design in high-voltage flyback topologies. |
Applications
| CRT Television Vertical Deflection | High-Voltage Switching Regulator |
|---|---|
Use Scenario: Driving vertical deflection yoke in analog CRT TVs with 50–60 Hz sawtooth waveform and reactive load impedance. IC Role / Device Role / Timing Role: Main switching transistor in series-pass vertical output stage, handling peak currents up to 1.5 A and 150 V transients. Use Value: Delivers stable gain (hFE 60–125) and low VCE(sat) ≤ 1 V to minimize power loss and thermal stress during continuous scanning. | Use Scenario: High-side switch in flyback or forward converter primary side with input voltages up to 120 VDC. IC Role / Device Role / Timing Role: Power switch controlling energy transfer to transformer primary; operated in hard-switched PWM mode at <100 kHz. Use Value: Withstands 150 V VCBO and VCEO, supports 25 W dissipation with heatsink, and maintains Cob = 50 pF for predictable turn-off timing. |
| Audio Output Stage (Low-Frequency) | Industrial Relay Driver |
Use Scenario: Class-B or AB audio output in low-frequency (<20 kHz) amplifier modules requiring high current swing. IC Role / Device Role / Timing Role: Single-ended output device delivering up to 1.5 A into 4–8 Ω loads with minimal crossover distortion. Use Value: hFE classification H2 ensures consistent biasing across units; TO-220 package allows direct heatsink attachment for thermal management. | Use Scenario: Driving high-inductance industrial relays (e.g., 12–24 V coils with >100 mH inductance) in PLC I/O modules. IC Role / Device Role / Timing Role: Saturated switch providing fast turn-on/turn-off control with clamped inductive kickback handling. Use Value: 150 V VCEO safely absorbs relay coil flyback spikes; low VCE(sat) reduces self-heating during continuous duty cycling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN high-voltage power transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MJD207G | TO-263 (D²PAK) package; same VCBO/VCEO (150 V), IC = 1.5 A, but hFE = 20–70 (lower gain range); higher Cob = 80 pF. | Suitable for surface-mount designs; less suitable for precision gain-critical deflection stages due to wider hFE spread. | Select when board space constraints favor SMT and gain tolerance >50 is acceptable. |
| 2SC5200 | Higher PC = 150 W, fT = 30 MHz, but lower VCBO = 230 V (not directly comparable); TO-3P package; hFE = 80–160. | Used in high-fidelity audio output; over-specified for TV deflection, requiring larger heatsink and layout changes. | Choose only if system-level redesign accommodates TO-3P footprint and higher drive current requirements. |
Compared with MJD207G and 2SC5200, the KSC2073H2 offers optimal balance of gain consistency (H2), TO-220 thermal interface, and 150 V ruggedness for legacy CRT vertical output-without over-engineering or SMT conversion overhead.
Availability
KSC2073H2 is available at Aetrix Electronics and suitable for CRT television repair, industrial relay driver replacement, and high-voltage switching regulator refurbishment requiring stable component supply and long-term traceability.
Supply support for KSC2073H2 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
onsemi (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power, analog, sensor, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The KSC2073H2 belongs to onsemi's legacy high-voltage bipolar transistor family, engineered specifically for reliability and thermal stability in analog video deflection and industrial switching applications.
FAQ
What is the hFE classification for KSC2073H2?
The KSC2073H2 is classified as hFE H2, meaning its DC current gain ranges from 60 to 125 when measured at VCE = 10 V and IC = 0.5 A. This tighter gain band improves predictability in base drive design compared to broader classifications like H1 (40–80). The H2 designation is laser-marked as "C2073-2" on the TO-220-3LD package. KSC2073H2 remains functionally distinct from standard KSC2073 (H1) units despite identical package and absolute ratings.
Is KSC2073H2 still in active production?
No-KSC2073H2 is officially discontinued per onsemi's January 2026 Rev. 3 datasheet, marked "DISCONTINUED" with Note 1 advising against new designs. However, Aetrix Electronics maintains limited legacy inventory with full traceability and provides engineering support for repair, maintenance, and end-of-life substitution planning for existing KSC2073H2-based systems.
What is the pinout configuration of KSC2073H2 in TO-220-3LD?
Viewing the TO-220-3LD package with the tab facing away and leads downward, the pinout is: Pin 1 (left) = Base, Pin 2 (center) = Collector (internally connected to metal tab), Pin 3 (right) = Emitter. This configuration is confirmed in the marking diagram on page 1 of the official onsemi datasheet (Publication Order Number KSC2073/D), and applies identically to KSC2073H2TU devices.
Can KSC2073H2 be used as a direct replacement for KSC2073?
KSC2073H2 is not a drop-in replacement for generic KSC2073 due to its H2 hFE classification (60–125) versus standard KSC2073's H1 (40–80). While electrically and mechanically identical-including same TO-220-3LD package, 150 V ratings, and 1.5 A current-circuit gain stability may differ. Verify base resistor values and thermal margins before substituting KSC2073H2 in legacy KSC2073 designs.
What thermal derating applies to KSC2073H2?
KSC2073H2 has a maximum collector dissipation of 25 W at TC = 25 °C, linearly derated to zero at TJ = 150 °C. The derating slope is 0.2 W/°C above 25 °C case temperature, per Figure 6 in the onsemi datasheet. Effective heatsinking is mandatory-typical thermal resistance from junction-to-case is 0.6 °C/W, so a 2.5 °C/W heatsink yields ~85 °C junction rise at 25 W, staying within safe limits.
KSC2073H2 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):
- 1.5 A
- Voltage - Collector Emitter Breakdown (Max):
- 150 V
- Vce Saturation (Max) @ Ib, Ic:
- 1V @ 50mA, 500mA
- Current - Collector Cutoff (Max):
- 10µA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 40 @ 500mA, 10V
- Power - Max:
- 25 W
- Frequency - Transition:
- 4MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220-3
KSC2073H2 FAQ
1.How can I place an order for KSC2073H2 through Aetrix?
Please submit a Request for Quotation (RFQ) for KSC2073H2 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 KSC2073H2 reliable?
The price and inventory of KSC2073H2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for KSC2073H2 is usually 5 days.
3.What payment methods are accepted for KSC2073H2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for KSC2073H2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for KSC2073H2?
KSC2073H2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your KSC2073H2 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 KSC2073H2?
For technical support, including KSC2073H2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your KSC2073H2 requirements.
6.How does Aetrix verify that KSC2073H2 is sourced from the original manufacturer or authorized distributors?
All KSC2073H2 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 KSC2073H2 meets industry standards.
7.What is the process for return or replacement of KSC2073H2?
All KSC2073H2 units undergo pre-shipment inspection (PSI). If there is an issue with KSC2073H2, 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 KSC2073H2 part is unused and in its original packaging.
Return procedure for KSC2073H2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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