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) > Bipolar RF Transistors

onsemi KSC1393YTA

Name: KSC1393YTA
Brand: onsemi
SKU: KSC1393YTA
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: KSC1393YTA

Manufacturer:: onsemi

Category:: Bipolar RF Transistors

Package:: TO-226-3, TO-92-3 (TO-226AA) Formed Leads

Datasheet:: KSC1393YTA.pdf

Description:: RF TRANS NPN 30V 700MHZ TO92-3

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:8,639

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

Product details

Overview

KSC1393YTA from Fairchild Semiconductor is an NPN epitaxial silicon transistor optimized for VHF TV tuner RF amplification with forward AGC capability. It delivers f_T = 700 MHz (typ), NF ≤ 3.0 dB at 200 MHz, and CRE ≤ 0.5 pF, operating at V_CE = 10 V, I_C = 3 mA in TO-92 package.

For engineers reviewing the KSC1393YTA datasheet, pinout, applications, or equivalent options, key selection criteria include its high f_T, low noise figure, tight h_FE classification (90–180), and verified performance in 200 MHz RF gain stages with AGC control.

Technical Context

This transistor uses epitaxial base construction to achieve high-frequency response and stable gain across VHF bands. Its forward AGC operation relies on controlled I_AGC (–10 to –12 mA) under GR = –30 dB at 200 MHz, enabling dynamic signal level regulation in tuner front-ends.

The device meets strict RF linearity requirements via low C_RE (0.35–0.5 pF) and high G_PE (20–24 dB), while maintaining thermal stability up to T_J = 150°C and low leakage (I_CBO ≤ 0.1 µA at V_CB = 20 V).

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	30 V - supports standard VHF tuner supply rails without breakdown risk
f_T	700 MHz (typ) - enables stable amplification through upper VHF band (174–230 MHz)
NF	≤ 3.0 dB at 200 MHz - ensures minimal signal degradation in sensitive RF receive paths
C_RE	≤ 0.5 pF - reduces unwanted feedback and improves amplifier stability
h_FE	90–180 (Y-class) - provides consistent current gain for predictable AGC loop behavior
I_AGC	–10 to –12 mA - defines emitter current range for reliable gain reduction at –30 dB GR
P_C	250 mW - allows continuous operation in compact TO-92 tuner modules without heatsinking

Pinout & Package

Package: TO-92, 3-lead plastic through-hole package with standard lead spacing (1.27 mm pitch), body height 4.58 mm max, and JEDEC-standard footprint.

Pin/Terminal	Circuit Role	Design Meaning
1	Base	Control electrode for biasing and AGC input; requires stable DC path for gain regulation
2	Emitter	AGC current sink terminal; carries I_AGC during gain reduction mode
3	Collector	RF output node; connected to tuned circuit with minimal parasitic inductance

Key Features

Feature	Design Value
High f_T with low C_RE	700 MHz f_T + 0.5 pF C_RE enables stable 200 MHz small-signal amplification
Forward AGC compatibility	Verified I_AGC = –10 to –12 mA at GR = –30 dB supports tuner-level automatic gain control
Low-noise RF performance	NF ≤ 3.0 dB at 200 MHz meets stringent VHF receiver sensitivity requirements
Y-class h_FE binning	90–180 h_FE range ensures consistent gain matching across production lots

Applications

TV VHF Tuner Front-End	VHF RF Amplifier Stage
Use Scenario: Amplifying weak terrestrial broadcast signals in analog/digital TV tuners operating 174–230 MHz. IC Role / Device Role / Timing Role: NPN RF amplifier with forward AGC input for dynamic gain control. Use Value: Delivers 24 dB power gain and ≤3.0 dB noise figure to preserve SNR in low-signal environments.	Use Scenario: Boosting signal level between antenna input and mixer stage in VHF receiver designs. IC Role / Device Role / Timing Role: Small-signal RF transistor configured as common-emitter amplifier. Use Value: 700 MHz f_T and 0.5 pF C_RE ensure stable gain and minimal oscillation risk at 200 MHz.
AGC-Controlled RF Gain Block	VHF Signal Conditioning Module
Use Scenario: Implementing variable-gain amplification in RF signal chains where input level varies widely. IC Role / Device Role / Timing Role: Emitter-driven AGC transistor regulating gain via I_AGC injection. Use Value: Confirmed –10 to –12 mA I_AGC at –30 dB GR enables precise, repeatable gain reduction.	Use Scenario: Signal conditioning in VHF instrumentation receivers requiring low-distortion amplification. IC Role / Device Role / Timing Role: High-linearity NPN transistor in grounded-base configuration. Use Value: Low C_RE and high f_T support wideband operation with minimal phase distortion.

TV VHF Tuner Front-End

VHF RF Amplifier Stage

Use Scenario: Amplifying weak terrestrial broadcast signals in analog/digital TV tuners operating 174–230 MHz.

IC Role / Device Role / Timing Role: NPN RF amplifier with forward AGC input for dynamic gain control.

Use Value: Delivers 24 dB power gain and ≤3.0 dB noise figure to preserve SNR in low-signal environments.

Use Scenario: Boosting signal level between antenna input and mixer stage in VHF receiver designs.

IC Role / Device Role / Timing Role: Small-signal RF transistor configured as common-emitter amplifier.

Use Value: 700 MHz f_T and 0.5 pF C_RE ensure stable gain and minimal oscillation risk at 200 MHz.

AGC-Controlled RF Gain Block

VHF Signal Conditioning Module

Use Scenario: Implementing variable-gain amplification in RF signal chains where input level varies widely.

IC Role / Device Role / Timing Role: Emitter-driven AGC transistor regulating gain via I_AGC injection.

Use Value: Confirmed –10 to –12 mA I_AGC at –30 dB GR enables precise, repeatable gain reduction.

Use Scenario: Signal conditioning in VHF instrumentation receivers requiring low-distortion amplification.

IC Role / Device Role / Timing Role: High-linearity NPN transistor in grounded-base configuration.

Use Value: Low C_RE and high f_T support wideband operation with minimal phase distortion.

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN RF amplifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
2SC3356(TE85L,F)	f_T = 7 GHz (min), higher V_CEO = 12 V, lower NF = 1.1 dB at 1 GHz	Optimized for UHF/1 GHz+ applications; not validated for VHF AGC use	Select only if operating above 400 MHz or requiring sub-1.5 dB NF
MPSH10	f_T = 650 MHz (min), h_FE = 60–120, no specified I_AGC or GR test data	Lacks documented forward AGC performance; suitable for fixed-gain VHF amps only	Choose when AGC functionality is unnecessary and cost is primary constraint

Compared with 2SC3356 and MPSH10, KSC1393YTA uniquely combines Y-class h_FE, verified I_AGC, and 200 MHz RF performance in a TO-92 package-making it the only option qualified for legacy VHF tuner forward AGC designs.

Availability

KSC1393YTA is available at Aetrix Electronics and suitable for TV tuner modules, VHF RF amplifier stages, and AGC-controlled signal conditioning circuits requiring stable component supply and long-lifecycle support.

Supply support for KSC1393YTA 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

Fairchild Semiconductor was a U.S.-based semiconductor company specializing in analog, discrete, and power management ICs before its acquisition by ON Semiconductor in 2016.

The KSC1393YTA belongs to Fairchild's legacy RF transistor product line, designed specifically for high-fidelity VHF signal amplification and forward AGC implementation in broadcast tuner systems.

FAQ

What is the h_FE range for KSC1393YTA?

The KSC1393YTA is Y-class binned with h_FE = 90–180 measured at V_CE = 10 V and I_C = 2 mA. This tighter gain spread ensures predictable AGC loop behavior and simplifies gain-setting resistor selection in tuner designs using KSC1393YTA.

Does KSC1393YTA support forward AGC operation?

Yes, KSC1393YTA is explicitly characterized for forward AGC: I_AGC = –10 to –12 mA is specified at GR = –30 dB and f = 200 MHz. This confirms its suitability as the gain-control transistor in VHF tuner front-ends using KSC1393YTA in emitter-driven AGC configurations.

What is the maximum operating frequency of KSC1393YTA?

The KSC1393YTA has a typical current gain–bandwidth product (f_T) of 700 MHz, verified at V_CE = 10 V and I_C = 3 mA. While usable up to ~500 MHz, its design focus and characterization are optimized for stable 200 MHz VHF RF amplification in tuner applications using KSC1393YTA.

What package type does KSC1393YTA use?

KSC1393YTA uses the TO-92 package-a 3-lead through-hole plastic package with 1.27 mm lead pitch and JEDEC-standard outline. Dimensions are fully documented in the Fairchild datasheet Rev. B1, confirming mechanical compatibility with legacy tuner PCB footprints for KSC1393YTA.

Is KSC1393YTA suitable for low-noise amplifier (LNA) applications?

Yes, KSC1393YTA is qualified as a low-noise RF amplifier with NF ≤ 3.0 dB at 200 MHz and V_CE = 10 V, I_C = 3 mA. Its combination of low C_RE (≤0.5 pF) and high G_PE (20–24 dB) makes KSC1393YTA appropriate for LNA stages in VHF broadcast receivers where noise performance is critical.

KSC1393YTA Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: TO-226-3, TO-92-3 (TO-226AA) Formed Leads

Packaging:: Tape & Box (TB)

Product Status:: Obsolete

Transistor Type:: NPN

Voltage - Collector Emitter Breakdown (Max):: 30V

Frequency - Transition:: 700MHz

Noise Figure (dB Typ @ f):: 2dB ~ 3dB @ 200MHz

Gain:: 20dB ~ 24dB

Power - Max:: 250mW

DC Current Gain (hFE) (Min) @ Ic, Vce:: 90 @ 2mA, 10V

Current - Collector (Ic) (Max):: 20mA

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-92-3

KSC1393YTA FAQ

1.How can I place an order for KSC1393YTA through Aetrix?

Please submit a Request for Quotation (RFQ) for KSC1393YTA 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 KSC1393YTA reliable?

The price and inventory of KSC1393YTA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for KSC1393YTA is usually 5 days.

3.What payment methods are accepted for KSC1393YTA?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for KSC1393YTA transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for KSC1393YTA?

KSC1393YTA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your KSC1393YTA 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 KSC1393YTA?

For technical support, including KSC1393YTA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your KSC1393YTA requirements.

6.How does Aetrix verify that KSC1393YTA is sourced from the original manufacturer or authorized distributors?

All KSC1393YTA 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 KSC1393YTA meets industry standards.

7.What is the process for return or replacement of KSC1393YTA?

All KSC1393YTA units undergo pre-shipment inspection (PSI). If there is an issue with KSC1393YTA, 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 KSC1393YTA part is unused and in its original packaging.

Return procedure for KSC1393YTA:

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…