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

onsemi KSC2073H2TU

Name: KSC2073H2TU
Brand: onsemi
SKU: KSC2073H2TU
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: KSC2073H2TU

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: TO-220-3

Datasheet:: KSC2073H2TU.pdf

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

Quantity:: RFQ Add To RFQ list

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Product details

Overview

KSC2073H2TU from onsemi is an NPN epitaxial silicon transistor designed for TV vertical deflection output stages, with 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 classification H2 (60–125). It operates in linear switching mode in high-voltage horizontal/vertical scan circuits.

For engineers reviewing the KSC2073H2TU datasheet, pinout, applications, or equivalent options, key selection criteria include vertical deflection duty cycle capability, safe operating area under pulsed load, thermal derating above 25 °C, 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 pulse handling in CRT television systems. Its 150 V V_CEO rating and 25 W power dissipation at case temperature support sustained operation under repetitive high-current pulses.

The H2 h_FE bin (60–125) ensures consistent current gain across production lots for stable biasing in fixed-gain driver stages. Cob = 50 pF at V_CB = 10 V enables predictable switching behavior in resonant flyback timing networks.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CBO	150 V - supports collector-base stress up to vertical retrace voltage peaks without breakdown
I_C	1.5 A - delivers peak vertical scan current into deflection yoke loads
P_C	25 W at T_C = 25 °C - defines maximum continuous power at heatsink interface; derates linearly above 25 °C
h_FE (H2)	60–125 - ensures predictable base drive requirements for fixed-bias vertical output stages
V_CE(sat)	≤1 V at I_C = 500 mA, I_B = 50 mA - minimizes conduction loss and self-heating during active scan period
f_T	4 MHz - sufficient for vertical deflection frequency (50–60 Hz) with margin for transient response
C_ob	50 pF at V_CB = 10 V - determines resonant timing with external flyback capacitor in deflection circuit

Pinout & Package

Package: TO-220-3LD (Case 340AT), lead-free, with integral metal tab electrically connected to collector. Mounting requires insulating washer when heatsink is grounded.

Pin/Terminal	Circuit Role	Design Meaning
1 (Base)	Current-controlled input node	Receives base drive current to modulate collector current; requires series resistor to limit I_B per h_FE and V_CE(sat) targets
2 (Collector)	Main high-current output terminal	Connected to deflection yoke and flyback transformer primary; electrically tied to metal tab and heatsink
3 (Emitter)	Reference and return path	Typically grounded in common-emitter vertical output configuration; carries full I_C return current

Key Features

Feature	Design Value
TV vertical deflection optimized	SOA curve validated for 50–60 Hz pulsed operation with 1.5 A peak current and 150 V V_CEO
Complementary pair with KSA940	Matched V_BR, I_C, and SOA enables balanced push-pull vertical output stage design
H2 h_FE binning	Narrower DC current gain spread (60–125) improves batch-to-batch consistency in fixed-bias designs
Pb-free and halide-free	Meets RoHS Directive 2011/65/EU and JEDEC JS709E material composition requirements

Applications

TV Vertical Deflection Output	High-Voltage Switching Regulator
Use Scenario: Driving vertical deflection yoke in CRT-based television receivers requiring precise 50/60 Hz sawtooth current waveform. IC Role / Device Role / Timing Role: NPN switching transistor operating in linear-to-saturated transition during vertical scan and flyback intervals. Use Value: 150 V V_CEO withstands flyback voltage spikes; 25 W power rating sustains thermal load over full field duration.	Use Scenario: High-side switch in offline quasi-resonant flyback controller auxiliary supply for main SMPS IC biasing. IC Role / Device Role / Timing Role: Primary-side switching element handling 100–250 VDC input with intermittent 1.5 A peak current. Use Value: 150 V V_CBO accommodates reflected transients; 50 pF C_ob stabilizes snubber network resonance.
Complementary Push-Pull Stage	Industrial Analog Signal Amplifier
Use Scenario: Paired with KSA940 in Class-B vertical output amplifier for broadcast monitor deflection circuits. IC Role / Device Role / Timing Role: NPN half of complementary emitter-follower output stage delivering bidirectional yoke current. Use Value: Matched SOA and V_BR ratings ensure symmetrical clipping and thermal balance between devices.	Use Scenario: Linear amplifier in high-voltage analog test equipment requiring 100 V swing and 1 A output capability. IC Role / Device Role / Timing Role: Medium-power NPN gain block in DC-coupled wideband amplifier chain. Use Value: 4 MHz f_T supports bandwidth beyond 100 kHz; 60–125 h_FE enables stable DC feedback loop design.

TV Vertical Deflection Output

High-Voltage Switching Regulator

Use Scenario: Driving vertical deflection yoke in CRT-based television receivers requiring precise 50/60 Hz sawtooth current waveform.

IC Role / Device Role / Timing Role: NPN switching transistor operating in linear-to-saturated transition during vertical scan and flyback intervals.

Use Value: 150 V V_CEO withstands flyback voltage spikes; 25 W power rating sustains thermal load over full field duration.

Use Scenario: High-side switch in offline quasi-resonant flyback controller auxiliary supply for main SMPS IC biasing.

IC Role / Device Role / Timing Role: Primary-side switching element handling 100–250 VDC input with intermittent 1.5 A peak current.

Use Value: 150 V V_CBO accommodates reflected transients; 50 pF C_ob stabilizes snubber network resonance.

Complementary Push-Pull Stage

Industrial Analog Signal Amplifier

Use Scenario: Paired with KSA940 in Class-B vertical output amplifier for broadcast monitor deflection circuits.

IC Role / Device Role / Timing Role: NPN half of complementary emitter-follower output stage delivering bidirectional yoke current.

Use Value: Matched SOA and V_BR ratings ensure symmetrical clipping and thermal balance between devices.

Use Scenario: Linear amplifier in high-voltage analog test equipment requiring 100 V swing and 1 A output capability.

IC Role / Device Role / Timing Role: Medium-power NPN gain block in DC-coupled wideband amplifier chain.

Use Value: 4 MHz f_T supports bandwidth beyond 100 kHz; 60–125 h_FE enables stable DC feedback loop design.

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
KSC2073TU	Same die, H1 h_FE bin (40–80); identical package and absolute max ratings	Lower h_FE requires higher base drive current; less suitable for low-I_B designs	Select when tighter h_FE lower bound is required or legacy BOM mandates H1 bin
2SC5200	Higher P_C = 150 W, f_T = 30 MHz, but V_CEO = 230 V - not drop-in; larger TO-3P package	Used in audio power amplifiers and high-fidelity RF drivers - over-specified for TV deflection	Choose only if system requires >25 W dissipation or >4 MHz bandwidth; PCB layout change required

Compared with KSC2073TU and 2SC5200, the KSC2073H2TU offers optimal h_FE range for stable vertical deflection biasing while maintaining pin-compatible fit in TO-220-3LD footprint - critical for repair and legacy CRT service replacement where H2 gain consistency reduces recalibration effort.

Availability

KSC2073H2TU is available at Aetrix Electronics and suitable for CRT television repair, industrial analog signal conditioning, high-voltage power supply auxiliary switching, and legacy broadcast equipment maintenance requiring stable component supply and long-term traceability.

Supply support for KSC2073H2TU 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 management, analog, sensors, and connectivity solutions for automotive, industrial, cloud, and consumer markets.

The KSC2073H2TU belongs to onsemi's legacy high-voltage bipolar transistor product line, engineered specifically for CRT television vertical deflection and high-reliability linear switching applications demanding robust SOA and controlled gain bins.

FAQ

What is the h_FE range for KSC2073H2TU?

The KSC2073H2TU is binned to the H2 classification, specifying a DC current gain (h_FE) range of 60 to 125 at V_CE = 10 V and I_C = 0.5 A. This tighter spread than the H1 bin improves predictability in fixed-base-drive vertical output stages. The h_FE value of KSC2073H2TU remains stable across its rated operating temperature range and supports reliable bias point establishment without active feedback compensation.

Is KSC2073H2TU pin-compatible with KSC2073TU?

Yes, KSC2073H2TU and KSC2073TU share identical TO-220-3LD packaging, pinout (Base–Collector–Emitter), and absolute maximum ratings. The only difference is h_FE binning: H2 (60–125) vs. H1 (40–80). No PCB layout change is needed when substituting KSC2073H2TU for KSC2073TU, though base resistor values may require minor adjustment to maintain target I_C due to the higher minimum h_FE of KSC2073H2TU.

What does "DISCONTINUED" mean for KSC2073H2TU?

"DISCONTINUED" indicates that onsemi no longer manufactures KSC2073H2TU for new designs, but Aetrix Electronics maintains active inventory and traceable legacy stock sourced from authorized channels. The device remains fully functional and supported for repair, maintenance, and legacy system sustainment. KSC2073H2TU meets all original specifications and is subject to standard Aetrix quality screening before release.

Can KSC2073H2TU replace KSA940 in a circuit?

No - KSC2073H2TU is an NPN transistor and KSA940 is a PNP device; they are complementary, not interchangeable. Attempting direct substitution would reverse polarity and cause circuit failure. KSC2073H2TU is intended to be used *with* KSA940 in push-pull configurations. The KSC2073H2TU datasheet explicitly states it is the complement to KSA940, confirming their paired usage in symmetric output stages.

What thermal derating applies to KSC2073H2TU above 25 °C?

KSC2073H2TU derates linearly from 25 W at T_C = 25 °C to 0 W at T_C = 150 °C, yielding a thermal resistance of approximately 5 °C/W (junction-to-case). For reliable operation, heatsink design must ensure case temperature stays below 100 °C under worst-case pulse loading. Derating curves in Figure 6 of the official KSC2073/D datasheet confirm this slope, and actual KSC2073H2TU performance matches the published SOA limits.

KSC2073H2TU 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:: 60 @ 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

KSC2073H2TU FAQ

1.How can I place an order for KSC2073H2TU through Aetrix?

Please submit a Request for Quotation (RFQ) for KSC2073H2TU 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 KSC2073H2TU reliable?

The price and inventory of KSC2073H2TU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for KSC2073H2TU is usually 5 days.

3.What payment methods are accepted for KSC2073H2TU?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for KSC2073H2TU transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for KSC2073H2TU?

KSC2073H2TU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your KSC2073H2TU 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 KSC2073H2TU?

For technical support, including KSC2073H2TU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your KSC2073H2TU requirements.

6.How does Aetrix verify that KSC2073H2TU is sourced from the original manufacturer or authorized distributors?

All KSC2073H2TU 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 KSC2073H2TU meets industry standards.

7.What is the process for return or replacement of KSC2073H2TU?

All KSC2073H2TU units undergo pre-shipment inspection (PSI). If there is an issue with KSC2073H2TU, 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 KSC2073H2TU part is unused and in its original packaging.

Return procedure for KSC2073H2TU:

1.Submit a request within 90 days.

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

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