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

onsemi KSC2310RTA

Name: KSC2310RTA
Brand: onsemi
SKU: KSC2310RTA
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: KSC2310RTA

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: TO-226-3, TO-92-3 Long Body, Formed Leads

Datasheet:: KSC2310RTA.pdf

Description:: TRANS NPN 150V 0.05A TO-92-3

Quantity:: RFQ Add To RFQ list

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Product details

Overview

KSC2310RTA from ON Semiconductor (formerly Fairchild) is an NPN epitaxial silicon transistor designed for high-voltage power amplifier and switching applications, featuring VCBO = 200 V, VCEO = 150 V, IC = 50 mA, fT = 100 MHz, and hFE = 120–240 (Y-class), commonly used in horizontal deflection circuits and CRT monitor output stages.

For engineers reviewing the KSC2310RTA datasheet, pinout, applications, or equivalent options, key selection criteria include breakdown voltage margin, DC current gain consistency at 10 mA, saturation voltage under forced beta = 10, safe operating area at elevated temperature, and TO-92L package thermal derating behavior.

Technical Context

This transistor employs an epitaxial base structure optimized for high-voltage operation and stable gain across temperature. Its 200 V collector-base rating enables use in flyback snubber networks and line-output stage switching where transient voltage overshoot exceeds 150 V.

The device exhibits a typical fT of 100 MHz at VCE = 30 V and IC = 10 mA, supporting RF amplification up to ~30 MHz in Class-A configurations. Cob = 3.5–5 pF at VCB = 10 V ensures low Miller capacitance for improved switching speed and reduced drive loss.

Key Specifications

Parameter	Value and Actual Design Meaning
VCBO	200 V - Withstands collector-base transients without avalanche conduction in flyback or inductive load switching.
VCEO	150 V - Maximum sustainable collector-emitter voltage under open-base conditions; defines safe linear/switching envelope.
hFE (Y-class)	120–240 - Tight DC current gain binning ensures predictable base drive requirements in amplifier bias networks.
fT	100 MHz - Enables stable small-signal amplification up to VHF band with controlled phase margin in tuned circuits.
VCE(sat)	0.5 V max at IC = 10 mA, IB = 1 mA - Low saturation voltage reduces conduction loss and self-heating in switching mode.
Cob	3.5–5 pF at VCB = 10 V - Minimizes Miller feedback, improving high-frequency stability and reducing gate/base drive burden.
PC	800 mW at Ta = 25°C - Requires thermal derating above 25°C ambient; TO-92L case limits continuous power in sealed enclosures.

Pinout & Package

Package: TO-92L - 3-lead through-hole plastic package with 2.54 mm lead pitch, 13.5 mm body length, and 3.9 mm width; optimized for vertical mounting and heat dissipation via leadframe conduction.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	Current sink terminal	Low-impedance return path; connected to ground or emitter resistor in common-emitter amplifier configuration.
2 (Collector)	High-voltage output node	Handles up to 150 V DC or pulsed; requires clearance >2.5 mm from adjacent traces in high-voltage PCB layout.
3 (Base)	Control input	Receives current-limited drive (typically 0.1–1 mA); sensitive to ESD-requires series resistor and/or clamping diode.

Key Features

Feature	Design Value
High VCBO rating	200 V enables reliable operation in CRT horizontal deflection and SMPS startup circuits with high-voltage spikes.
Y-class hFE binning	120–240 gain range ensures consistent bias point setting without manual gain sorting in production.
Low VCE(sat)	≤0.5 V at forced beta = 10 minimizes power loss and thermal stress during saturated switching.
100 MHz fT	Supports broadband amplification up to 30 MHz with <3 dB gain roll-off, suitable for video driver and oscillator applications.
TO-92L mechanical profile	Longer body than standard TO-92 improves creepage distance and allows higher voltage isolation on PCB.

Applications

Horizontal Deflection Output	Video Amplifier Stage
Use Scenario: Driving horizontal output transformer in CRT monitors and TVs, handling repetitive 15.734 kHz sawtooth current pulses with 1.2 kV flyback spikes. IC Role / Device Role / Timing Role: Switching transistor in quasi-resonant flyback topology; operates in active/saturation boundary with fast turn-off. Use Value: 200 V VCBO withstands flyback overshoot; 100 MHz fT ensures clean edge fidelity and minimal ringing during retrace.	Use Scenario: Amplifying composite video signals (0–5 MHz) in analog display interface boards before DAC or sync separation. IC Role / Device Role / Timing Role: Common-emitter wideband amplifier with emitter degeneration for flat gain response and low distortion. Use Value: Y-class hFE ensures stable 20 dB gain across production units; Cob ≤5 pF preserves high-frequency bandwidth without peaking.
DC-DC Converter Switch	High-Voltage Sensor Interface
Use Scenario: Low-power isolated DC-DC converter primary-side switch in industrial sensor modules requiring <500 mW output. IC Role / Device Role / Timing Role: Self-oscillating transistor in Royer or blocking oscillator topology; base driven by transformer feedback. Use Value: 800 mW PC supports intermittent duty cycle; 150 V VCEO accommodates reflected secondary voltage plus margin.	Use Scenario: Level-shifting and buffering high-impedance analog signals from piezoelectric or ionization sensors operating at ±100 V bias. IC Role / Device Role / Timing Role: Emitter-follower buffer isolating microcontroller ADC inputs from high-voltage signal sources. Use Value: 5 V VEBO rating permits safe base-emitter reverse bias; low ICBO (<0.1 µA) prevents leakage-induced offset drift.

Horizontal Deflection Output

Video Amplifier Stage

Use Scenario: Driving horizontal output transformer in CRT monitors and TVs, handling repetitive 15.734 kHz sawtooth current pulses with 1.2 kV flyback spikes.

IC Role / Device Role / Timing Role: Switching transistor in quasi-resonant flyback topology; operates in active/saturation boundary with fast turn-off.

Use Value: 200 V VCBO withstands flyback overshoot; 100 MHz fT ensures clean edge fidelity and minimal ringing during retrace.

Use Scenario: Amplifying composite video signals (0–5 MHz) in analog display interface boards before DAC or sync separation.

IC Role / Device Role / Timing Role: Common-emitter wideband amplifier with emitter degeneration for flat gain response and low distortion.

Use Value: Y-class hFE ensures stable 20 dB gain across production units; Cob ≤5 pF preserves high-frequency bandwidth without peaking.

DC-DC Converter Switch

High-Voltage Sensor Interface

Use Scenario: Low-power isolated DC-DC converter primary-side switch in industrial sensor modules requiring <500 mW output.

IC Role / Device Role / Timing Role: Self-oscillating transistor in Royer or blocking oscillator topology; base driven by transformer feedback.

Use Value: 800 mW PC supports intermittent duty cycle; 150 V VCEO accommodates reflected secondary voltage plus margin.

Use Scenario: Level-shifting and buffering high-impedance analog signals from piezoelectric or ionization sensors operating at ±100 V bias.

IC Role / Device Role / Timing Role: Emitter-follower buffer isolating microcontroller ADC inputs from high-voltage signal sources.

Use Value: 5 V VEBO rating permits safe base-emitter reverse bias; low ICBO (<0.1 µA) prevents leakage-induced offset drift.

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN high-voltage amplifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
KSC2328RTA	Higher VCEO = 200 V, same TO-92L, hFE = 120–240 (Y), fT = 120 MHz	Better suited for 175–200 V bus applications; slightly faster switching but identical pinout and biasing.	Select when system flyback voltage exceeds 150 V or when >30 MHz small-signal bandwidth is required.
MPSA42	VCEO = 300 V, VCBO = 300 V, hFE = 40–250 (unbinned), fT = 50 MHz, TO-92	Higher breakdown margin but lower fT; wider hFE spread increases need for individual bias tuning.	Choose for ultra-high-voltage safety-critical circuits where 150 V margin is insufficient, accepting reduced RF performance.

Compared with KSC2310RTA, KSC2328RTA offers extended voltage headroom and higher bandwidth while maintaining full pin compatibility, whereas MPSA42 trades bandwidth and gain consistency for significantly higher absolute breakdown ratings-making it preferable only when VCBO > 200 V is mandatory.

Availability

KSC2310RTA is available at Aetrix Electronics and suitable for CRT display repair, analog video signal conditioning, and low-power high-voltage DC-DC conversion requiring stable component supply and long-term obsolescence support.

Supply support for KSC2310RTA 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 IoT applications.

The KSC2310RTA belongs to Fairchild's legacy high-voltage bipolar transistor family, engineered specifically for horizontal deflection, video amplification, and high-voltage switching in analog display and power conversion systems.

FAQ

What is the maximum collector-emitter voltage rating for KSC2310RTA?

The KSC2310RTA has a guaranteed minimum collector-emitter breakdown voltage (BV_CEO) of 150 V at I_C = 5 mA and I_B = 0. This rating defines the absolute upper limit for DC or pulsed V_CE in linear or switching operation. Exceeding 150 V risks avalanche conduction and permanent degradation. The KSC2310RTA must be operated within this limit unless external clamping is applied.

Is KSC2310RTA suitable for use in switching power supplies?

Yes, the KSC2310RTA is suitable for low-power switching power supplies such as flyback or blocking oscillators, provided peak collector voltage remains ≤150 V and average power dissipation stays within 800 mW derated for ambient temperature. Its 100 MHz fT and low V_CE(sat) support efficient operation up to ~100 kHz switching frequencies with appropriate base drive design.

What does the 'RTA' suffix indicate in KSC2310RTA?

The 'RTA' suffix in KSC2310RTA denotes tape-and-reel packaging (1,000 units per reel) and Y-class hFE binning (120–240) per the original Fairchild specification. It confirms compliance with RoHS-6 and Pb-free plating, and distinguishes this version from bulk-packed or R/O-class variants. The KSC2310RTA is not functionally different from KSC2310Y but reflects updated packaging and environmental compliance.

How does the TO-92L package differ from standard TO-92 for KSC2310RTA?

The TO-92L package used for KSC2310RTA features a longer body (13.5 mm vs. 4.6 mm) and extended leads to increase creepage and clearance distances-critical for high-voltage applications like CRT deflection. Unlike standard TO-92, TO-92L maintains 2.54 mm lead pitch but provides superior voltage isolation and improved thermal conduction via longer leadframe exposure, directly enhancing reliability in KSC2310RTA designs operating near 150 V.

Can KSC2310RTA replace KSC2310 in existing designs?

Yes, KSC2310RTA is a direct replacement for KSC2310 in all functional, electrical, and mechanical respects. Both share identical absolute maximum ratings, electrical characteristics, TO-92L package dimensions, and pinout (E-C-B). The 'RTA' suffix indicates tape-and-reel packaging and Y-class hFE binning, making KSC2310RTA fully compatible with legacy KSC2310 layouts and schematics without modification.

KSC2310RTA Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: TO-226-3, TO-92-3 Long Body, Formed Leads

Packaging:: Tape & Box (TB)

Product Status:: Obsolete

Transistor Type:: NPN

Current - Collector (Ic) (Max):: 50 mA

Voltage - Collector Emitter Breakdown (Max):: 150 V

Vce Saturation (Max) @ Ib, Ic:: 500mV @ 1mA, 10mA

Current - Collector Cutoff (Max):: 100nA (ICBO)

DC Current Gain (hFE) (Min) @ Ic, Vce:: 40 @ 10mA, 5V

Power - Max:: 800 mW

Frequency - Transition:: 100MHz

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-92-3

KSC2310RTA FAQ

1.How can I place an order for KSC2310RTA through Aetrix?

Please submit a Request for Quotation (RFQ) for KSC2310RTA 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 KSC2310RTA reliable?

The price and inventory of KSC2310RTA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for KSC2310RTA is usually 5 days.

3.What payment methods are accepted for KSC2310RTA?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for KSC2310RTA transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for KSC2310RTA?

KSC2310RTA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your KSC2310RTA 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 KSC2310RTA?

For technical support, including KSC2310RTA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your KSC2310RTA requirements.

6.How does Aetrix verify that KSC2310RTA is sourced from the original manufacturer or authorized distributors?

All KSC2310RTA 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 KSC2310RTA meets industry standards.

7.What is the process for return or replacement of KSC2310RTA?

All KSC2310RTA units undergo pre-shipment inspection (PSI). If there is an issue with KSC2310RTA, 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 KSC2310RTA part is unused and in its original packaging.

Return procedure for KSC2310RTA:

1.Submit a request within 90 days.

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

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