Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

onsemi KSC2330YBU

Name: KSC2330YBU
Brand: onsemi
SKU: KSC2330YBU
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: KSC2330YBU

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

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

Datasheet:: KSC2330YBU.pdf

Description:: TRANS NPN 300V 0.1A TO-92-3

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:4,242

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

KSC2330YBU from onsemi is an NPN epitaxial silicon transistor designed for chroma output stages in color TV systems, featuring 300 V collector-base and collector-emitter breakdown voltage, 100 mA continuous collector current, 1 W power dissipation, and 50 MHz current gain bandwidth product (f_T).

For engineers reviewing the KSC2330YBU datasheet, pinout, applications, or equivalent options, key selection criteria include high-voltage switching capability, DC current gain classification (Y = h_FE 120–240), low saturation voltage (V_CE(sat) ≤ 0.5 V at I_C = 10 mA/I_B = 1 mA), and TO-92L package compatibility with legacy video signal path designs.

Technical Context

This device operates as a medium-power, high-voltage NPN switching transistor optimized for analog video signal amplification and chroma demodulation circuits. Its 300 V VCBO/VC EO ratings enable safe operation in CRT-based deflection and color decoding stages where transient voltage spikes exceed 200 V.

The KSC2330YBU exhibits f_T = 50 MHz (typical) under V_CE = 30 V and I_C = 10 mA conditions, supporting stable small-signal gain up to ~30 MHz in tuned chroma IF amplifiers. Its Cob = 4 pF at V_CB = 10 V ensures minimal capacitive loading in high-impedance video node applications.

Key Specifications

Parameter	Value and Actual Design Meaning
VCBO / VCEO	300 V - Supports operation in high-voltage video output stages without breakdown under transient stress.
IC (max)	100 mA - Sufficient drive capability for chroma driver loads and moderate-current switching nodes.
PC (max)	1 W - Enables continuous operation at elevated ambient temperatures when mounted on standard PCB copper.
hFE (Y-class)	120–240 - Tight DC current gain binning ensures predictable biasing and gain stability across production lots.
fT (typ.)	50 MHz - Validates usable small-signal bandwidth for NTSC/PAL chroma carrier (3.58/4.43 MHz) amplification with margin.
VCE(sat)	≤ 0.5 V @ IC=10mA/IB=1mA - Minimizes power loss and thermal rise during saturated switching in driver stages.
Cob	4 pF @ VCB=10V - Limits high-frequency feedback and maintains phase margin in multi-stage video amplifiers.

Pinout & Package

Package: TO-92L (Case 135AM), lead-formed, 3-pin through-hole plastic package with 8.0 mm × 4.9 mm footprint and standardized pin spacing for manual or wave solder assembly.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	Current sink terminal	Connected to ground or low-impedance return path; polarity defines NPN operation and current flow direction.
2 (Collector)	High-voltage output node	Interfaces with load (e.g., chroma transformer primary); rated for 300 V reverse bias and 100 mA DC current.
3 (Base)	Control input	Receives bias current to set operating point; requires external resistor network to achieve target hFE-dependent I_C.

Key Features

Feature	Design Value
High-voltage rating	300 V VCBO/VC EO enables direct use in CRT chroma output without external snubbing or clamping.
Y-class hFE binning	120–240 hFE range reduces need for per-unit bias trimming in volume TV manufacturing.
Low VCE(sat)	≤ 0.5 V saturation voltage minimizes conduction loss and improves thermal efficiency in Class-A/B driver stages.
50 MHz fT	Sufficient bandwidth for chroma IF amplification while maintaining stability in feedback-compensated designs.
TO-92L mechanical form	Standardized footprint allows drop-in replacement of legacy Fairchild KSC2330 variants in existing PCB layouts.

Applications

Color TV Chroma Output	Video Signal Amplifier
Use Scenario: Amplifying and buffering the 3.58 MHz (NTSC) or 4.43 MHz (PAL) chrominance subcarrier in analog television receivers. IC Role / Device Role / Timing Role: NPN switching amplifier operating in Class-A or Class-AB mode to deliver low-distortion chroma signal to the matrix network. Use Value: High hFE and 50 MHz fT ensure flat gain response across chroma band; 300 V rating withstands flyback-induced transients in CRT horizontal deflection coupling.	Use Scenario: Driving coaxial cable or transformer-coupled video paths in broadcast monitoring equipment and legacy test instruments. IC Role / Device Role / Timing Role: Medium-power line driver providing current gain and isolation between video processing stages. Use Value: Low V_CE(sat) and 1 W power rating support continuous 100 mA output into 75 Ω loads without thermal derating at 50°C ambient.
Deflection Circuit Driver	Legacy CRT Display Interface
Use Scenario: Switching auxiliary deflection windings or focus/grid modulation circuits in analog monitor and oscilloscope vertical/horizontal stages. IC Role / Device Role / Timing Role: High-voltage switch controlling current flow through inductive deflection loads with fast turn-on/turn-off. Use Value: 300 V breakdown voltage accommodates back-EMF spikes >250 V; 4 pF Cob limits Miller effect during switching transitions.	Use Scenario: Replacing obsolete transistors in field-service repair of 1980s–1990s CRT-based medical imaging displays and industrial HMI panels. IC Role / Device Role / Timing Role: Pin-compatible upgrade for KSC2330R/O/Y variants in fixed-bias video output stages. Use Value: Identical TO-92L package and pinout (E-C-B) enables no-change board replacement; Y-bin hFE simplifies recalibration of existing bias networks.

Color TV Chroma Output

Video Signal Amplifier

Use Scenario: Amplifying and buffering the 3.58 MHz (NTSC) or 4.43 MHz (PAL) chrominance subcarrier in analog television receivers.

IC Role / Device Role / Timing Role: NPN switching amplifier operating in Class-A or Class-AB mode to deliver low-distortion chroma signal to the matrix network.

Use Value: High hFE and 50 MHz fT ensure flat gain response across chroma band; 300 V rating withstands flyback-induced transients in CRT horizontal deflection coupling.

Use Scenario: Driving coaxial cable or transformer-coupled video paths in broadcast monitoring equipment and legacy test instruments.

IC Role / Device Role / Timing Role: Medium-power line driver providing current gain and isolation between video processing stages.

Use Value: Low V_CE(sat) and 1 W power rating support continuous 100 mA output into 75 Ω loads without thermal derating at 50°C ambient.

Deflection Circuit Driver

Legacy CRT Display Interface

Use Scenario: Switching auxiliary deflection windings or focus/grid modulation circuits in analog monitor and oscilloscope vertical/horizontal stages.

IC Role / Device Role / Timing Role: High-voltage switch controlling current flow through inductive deflection loads with fast turn-on/turn-off.

Use Value: 300 V breakdown voltage accommodates back-EMF spikes >250 V; 4 pF Cob limits Miller effect during switching transitions.

Use Scenario: Replacing obsolete transistors in field-service repair of 1980s–1990s CRT-based medical imaging displays and industrial HMI panels.

IC Role / Device Role / Timing Role: Pin-compatible upgrade for KSC2330R/O/Y variants in fixed-bias video output stages.

Use Value: Identical TO-92L package and pinout (E-C-B) enables no-change board replacement; Y-bin hFE simplifies recalibration of existing bias networks.

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
BC639	Lower VCBO (80 V), higher hFE (40–250), same TO-92 package but not rated for >100 V operation.	Restricted to low-voltage video preamp or logic interface; unsuitable for CRT chroma output due to insufficient breakdown margin.	Select only for non-high-voltage signal conditioning where 300 V rating is unnecessary.
MPSA42	Higher VCBO (300 V), lower fT (50 MHz same), hFE 50–250, TO-92 package with identical E-C-B pinout.	Valid alternative for chroma output and deflection driver roles; slightly lower Cob (2.5 pF) improves HF stability but may require layout verification.	Preferred when tighter Cob control or broader hFE distribution is acceptable; verify thermal performance at 1 W dissipation.

Compared with BC639 and MPSA42, the KSC2330YBU delivers guaranteed 300 V breakdown with Y-bin hFE consistency and chroma-optimized fT/Cob trade-off-making it uniquely suited for legacy TV service and high-reliability analog video output replacement where voltage margin and gain predictability are critical.

Availability

KSC2330YBU is available at Aetrix Electronics and suitable for color TV repair, analog video equipment refurbishment, and legacy CRT display interface design requiring stable component supply and long-term obsolescence mitigation.

Supply support for KSC2330YBU 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 and Fairchild Semiconductor) is a global semiconductor supplier specializing in energy-efficient power management, analog, sensor, and connectivity solutions.

The KSC2330YBU belongs to onsemi's legacy bipolar transistor portfolio, originally developed for analog video signal chain applications in consumer CRT electronics and maintained for backward compatibility in service and industrial repair markets.

FAQ

What is the pin configuration of the KSC2330YBU?

The KSC2330YBU uses a standard TO-92L package with emitter (pin 1), collector (pin 2), and base (pin 3) arranged in E-C-B order. This matches the original Fairchild KSC2330 pinout and enables direct replacement in legacy designs without PCB modification. The lead-formed geometry supports both manual soldering and wave solder processes.

How does the 'Y' suffix in KSC2330YBU affect its electrical behavior?

The 'Y' suffix denotes the hFE bin: KSC2330YBU has a guaranteed DC current gain of 120–240 at V_CE = 10 V and I_C = 20 mA. This tighter gain range improves consistency in bias-sensitive chroma amplifier stages and reduces unit-to-unit variation in production calibration, unlike the broader R (40–80) or O (70–140) bins.

Can KSC2330YBU replace KSC2330O or KSC2330R in existing designs?

Yes-KSC2330YBU is a direct functional upgrade for KSC2330O and KSC2330R, sharing identical absolute maximum ratings, package, pinout, and thermal characteristics. Its higher hFE bin provides improved gain margin and reduced base drive requirements, though existing bias resistors may require minor adjustment to maintain optimal Q-point.

What is the maximum operating temperature for KSC2330YBU?

The KSC2330YBU has a maximum junction temperature (T_J) of 150°C and storage temperature range of –55°C to +150°C. At ambient temperatures above 50°C, power dissipation must be derated linearly from 1 W at 25°C to zero at 150°C, per the published power derating curve in the datasheet.

Is KSC2330YBU suitable for switching power supply applications?

No-KSC2330YBU is not recommended for modern SMPS designs due to its relatively slow switching speed (f_T = 50 MHz), lack of specified t_on/t_off, and absence of avalanche-rated safe operating area data. It was engineered for analog video signal handling, not high-frequency PWM switching; use dedicated power transistors like MJD122 or NSS12601 for such applications.

KSC2330YBU Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

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

Packaging:: Bulk

Product Status:: Obsolete

Transistor Type:: NPN

Current - Collector (Ic) (Max):: 100 mA

Voltage - Collector Emitter Breakdown (Max):: 300 V

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

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

DC Current Gain (hFE) (Min) @ Ic, Vce:: 120 @ 20mA, 10V

Power - Max:: 1 W

Frequency - Transition:: 50MHz

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-92-3

KSC2330YBU FAQ

1.How can I place an order for KSC2330YBU through Aetrix?

Please submit a Request for Quotation (RFQ) for KSC2330YBU 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 KSC2330YBU reliable?

The price and inventory of KSC2330YBU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for KSC2330YBU is usually 5 days.

3.What payment methods are accepted for KSC2330YBU?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for KSC2330YBU transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for KSC2330YBU?

KSC2330YBU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your KSC2330YBU 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 KSC2330YBU?

For technical support, including KSC2330YBU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your KSC2330YBU requirements.

6.How does Aetrix verify that KSC2330YBU is sourced from the original manufacturer or authorized distributors?

All KSC2330YBU 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 KSC2330YBU meets industry standards.

7.What is the process for return or replacement of KSC2330YBU?

All KSC2330YBU units undergo pre-shipment inspection (PSI). If there is an issue with KSC2330YBU, 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 KSC2330YBU part is unused and in its original packaging.

Return procedure for KSC2330YBU:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-09 Counterfeit Electronic Components: How to Detect, Authenticate, and Test Suspect Parts

Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …

2026-09-08 Obsolete Electronic Components: How to Source and Evaluate Replacements

A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…