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Home > Products > Discrete Semiconductor Products > Transistors > Bipolar (BJT) > Single Bipolar Transistors

onsemi KSC2073H1TU

Name: KSC2073H1TU
Brand: onsemi
SKU: KSC2073H1TU
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: KSC2073H1TU

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: TO-220-3

Datasheet:: KSC2073H1TU.pdf

Description:: TRANS NPN 150V 1.5A TO-220-3

Quantity:: RFQ Add To RFQ list

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Product details

Overview

KSC2073H1TU from onsemi is an NPN epitaxial silicon transistor designed for TV vertical deflection output stages, featuring V_CBO = 150 V, V_CEO = 150 V, I_C = 1.5 A, P_C = 25 W at T_C = 25 °C, and h_FE = 40–80 (H1 classification). It operates in linear switching mode with f_T = 4 MHz and C_ob = 50 pF, commonly used in CRT television horizontal/vertical scan circuitry.

For engineers reviewing the KSC2073H1TU datasheet, pinout, applications, or equivalent options, key selection considerations include its TO-220-3LD package, vertical deflection duty cycle capability, safe operating area (SOA) limits, and complementary pairing with KSA940 for push-pull output stages.

Technical Context

This device is a medium-power, high-voltage NPN bipolar junction transistor optimized for vertical deflection linearity and thermal stability in analog CRT display systems. Its 150 V breakdown ratings and 25 W power dissipation support sustained pulse operation under inductive load conditions typical of flyback transformer drive.

The H1 h_FE bin (40–80) ensures predictable DC biasing in fixed-gain driver circuits, while the 4 MHz f_T and 50 pF Cob enable stable switching up to ~15.7 kHz vertical scan frequencies without excessive phase lag or ringing.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CBO	150 V - supports collector-base stress during flyback recovery without avalanche conduction
I_C	1.5 A - delivers peak vertical deflection current into reactive loads
P_C	25 W at T_C = 25 °C - requires heatsinking for continuous operation above 10 W
h_FE (H1)	40–80 - enables stable base drive design with ±20% gain tolerance
f_T	4 MHz - sufficient for 15.7 kHz vertical scanning with margin for waveform fidelity
C_ob	50 pF - minimizes Miller effect distortion in high-dV/dt vertical sweep applications

Pinout & Package

Package: TO-220-3LD (Case 340AT), lead-free, through-hole mounting with integral heat sink tab (collector-connected).

Pin/Terminal	Circuit Role	Design Meaning
1 (Base)	Current-controlled input node	Receives base drive current to modulate collector current; requires series resistor for current limiting
2 (Collector)	Main power output terminal	Connected to flyback transformer primary; electrically tied to metal tab for thermal path
3 (Emitter)	Reference return node	Provides low-impedance ground return for vertical deflection current loop

Key Features

Feature	Design Value
TV vertical deflection optimized	SOA and thermal design validated for 60 Hz frame-rate pulsed load cycling
Complementary pair with KSA940	Enables matched push-pull output stage with symmetric voltage/current handling
Pb-free and halide-free construction	Meets RoHS Directive 2011/65/EU and JEDEC J-STD-020 reflow compliance
TO-220-3LD mechanical outline	Standardized footprint compatible with legacy CRT service replacement tooling and fixtures

Applications

TV Vertical Deflection Output	High-Voltage Switching Regulator
Use Scenario: Driving vertical deflection yoke in CRT televisions requiring precise 60 Hz sawtooth current waveform. IC Role / Device Role / Timing Role: Power switching transistor controlling yoke current ramp and flyback reset timing. Use Value: 150 V V_CEO withstands flyback voltage spikes; 25 W dissipation sustains 100 ms pulse duty cycles.	Use Scenario: High-side switch in offline quasi-resonant DC-DC converters operating at ≤100 kHz. IC Role / Device Role / Timing Role: Main switching element regulating energy transfer via primary-side inductance. Use Value: 1.5 A I_C and 4 MHz f_T support efficient switching with minimal turn-off delay in 50–100 kHz range.
Legacy Display Repair	Analog Signal Amplifier Stage
Use Scenario: Drop-in replacement for obsolete vertical output transistors in field-service CRT monitors. IC Role / Device Role / Timing Role: Direct-fit mechanical and electrical substitute preserving original board layout and bias network. Use Value: TO-220-3LD package and identical pinout (B-C-E) ensure zero PCB modification during repair.	Use Scenario: Linear Class-A amplifier in analog video signal reconstruction circuits. IC Role / Device Role / Timing Role: Voltage-controlled current source delivering stable emitter-follower output. Use Value: h_FE = 40–80 provides predictable gain setting; low V_CE(sat) ≤ 1 V maintains headroom for 12 V rail operation.

TV Vertical Deflection Output

High-Voltage Switching Regulator

Use Scenario: Driving vertical deflection yoke in CRT televisions requiring precise 60 Hz sawtooth current waveform.

IC Role / Device Role / Timing Role: Power switching transistor controlling yoke current ramp and flyback reset timing.

Use Value: 150 V V_CEO withstands flyback voltage spikes; 25 W dissipation sustains 100 ms pulse duty cycles.

Use Scenario: High-side switch in offline quasi-resonant DC-DC converters operating at ≤100 kHz.

IC Role / Device Role / Timing Role: Main switching element regulating energy transfer via primary-side inductance.

Use Value: 1.5 A I_C and 4 MHz f_T support efficient switching with minimal turn-off delay in 50–100 kHz range.

Legacy Display Repair

Analog Signal Amplifier Stage

Use Scenario: Drop-in replacement for obsolete vertical output transistors in field-service CRT monitors.

IC Role / Device Role / Timing Role: Direct-fit mechanical and electrical substitute preserving original board layout and bias network.

Use Value: TO-220-3LD package and identical pinout (B-C-E) ensure zero PCB modification during repair.

Use Scenario: Linear Class-A amplifier in analog video signal reconstruction circuits.

IC Role / Device Role / Timing Role: Voltage-controlled current source delivering stable emitter-follower output.

Use Value: h_FE = 40–80 provides predictable gain setting; low V_CE(sat) ≤ 1 V maintains headroom for 12 V rail operation.

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
KSC2073H2TU	Higher h_FE bin (60–125); otherwise identical ratings and package	Better suited for low-base-drive designs where gain margin is critical	Select H2 when base current budget is constrained or temperature drift compensation is required
MJE13005G	Same TO-220 package; V_CEO = 400 V, I_C = 4 A, P_C = 75 W - higher voltage/current but lower f_T (1 MHz)	More robust for flyback overvoltage events but less suitable for precise vertical linearity	Choose MJE13005G only if system-level flyback voltage exceeds 150 V or peak current >1.5 A

Compared with KSC2073H1TU, the H2 variant offers improved DC gain consistency for tighter bias control, while MJE13005G trades bandwidth and gain linearity for higher voltage headroom and power handling-neither is pin-compatible, but both serve overlapping vertical/horizontal deflection roles in legacy CRT systems.

Availability

KSC2073H1TU is available at Aetrix Electronics and suitable for CRT television repair, analog display subsystems, and industrial high-voltage pulse generator applications requiring stable component supply and long-term BOM continuity.

Supply support for KSC2073H1TU 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 power management, analog, sensor, and discrete devices for automotive, industrial, and consumer markets.

The KSC2073 series belongs to onsemi's legacy high-voltage bipolar transistor product line, engineered specifically for analog video deflection and high-reliability switching in CRT-based display systems.

FAQ

What is the pin configuration of the KSC2073H1TU?

The KSC2073H1TU uses a TO-220-3LD package with standardized pinout: Pin 1 = Base, Pin 2 = Collector (connected to metal tab), Pin 3 = Emitter. This matches the marking diagram in the official onsemi datasheet (KSC2073/D, Rev. 3) and is mechanically identical to KSC2073TU and KSC2073H2TU variants. No alternate pinouts exist for this part number.

Is KSC2073H1TU still in active production?

No-KSC2073H1TU is discontinued per onsemi's official notice in the January 2026 revision of the KSC2073/D datasheet. While not recommended for new designs, Aetrix Electronics maintains limited legacy stock and supports repair-channel demand with full traceability and documentation for KSC2073H1TU.

How does KSC2073H1TU differ from KSC2073H2TU?

KSC2073H1TU and KSC2073H2TU share identical absolute maximum ratings, package, and marking format, differing only in h_FE bin: H1 = 40–80, H2 = 60–125. Both meet the same TV vertical deflection performance specs, but H2 provides higher and wider DC current gain for designs needing greater base-current margin or reduced thermal drift sensitivity.

Can KSC2073H1TU be used as a direct replacement for KSC2073TU?

Yes-KSC2073H1TU is functionally and mechanically identical to KSC2073TU except for h_FE binning. Both use TO-220-3LD packaging, share identical pinout, voltage/current ratings, and thermal specifications. The "H1" suffix denotes the specific gain group; no PCB or schematic changes are needed when substituting KSC2073H1TU for KSC2073TU in legacy repair contexts.

What is the maximum safe operating temperature for KSC2073H1TU?

The KSC2073H1TU has a maximum junction temperature (T_J) of 150 °C and storage temperature range of −55 °C to +150 °C. For reliable long-term operation, case temperature (T_C) must remain ≤25 °C to sustain full 25 W dissipation; derating is required above that point per Figure 6 in the KSC2073/D datasheet. Thermal design must ensure adequate heatsinking to avoid exceeding T_J.

KSC2073H1TU Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: TO-220-3

Packaging:: Tube

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

KSC2073H1TU FAQ

1.How can I place an order for KSC2073H1TU through Aetrix?

Please submit a Request for Quotation (RFQ) for KSC2073H1TU 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 KSC2073H1TU reliable?

The price and inventory of KSC2073H1TU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for KSC2073H1TU is usually 5 days.

3.What payment methods are accepted for KSC2073H1TU?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for KSC2073H1TU transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for KSC2073H1TU?

KSC2073H1TU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your KSC2073H1TU 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 KSC2073H1TU?

For technical support, including KSC2073H1TU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your KSC2073H1TU requirements.

6.How does Aetrix verify that KSC2073H1TU is sourced from the original manufacturer or authorized distributors?

All KSC2073H1TU 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 KSC2073H1TU meets industry standards.

7.What is the process for return or replacement of KSC2073H1TU?

All KSC2073H1TU units undergo pre-shipment inspection (PSI). If there is an issue with KSC2073H1TU, 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 KSC2073H1TU part is unused and in its original packaging.

Return procedure for KSC2073H1TU:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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