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HomeProductsDiscrete Semiconductor ProductsTransistors - Bipolar (BJT) - RFSTART499ETR
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START499ETR - STMicroelectronics

Manufacturer Part Number
START499ETR
Manufacturer
STMicroelectronics
Allelco Part Number
32D-START499ETR
Warranty
1 Year Allelco Warranty - Find out more
Parts Description
RF TRANS NPN 4.5V 1.9GHZ SOT343
Package
SOT-343
Data sheet
1.START499ETR.pdf ...

Datasheets

START499ETR.pdf

PCN Obsolescence/ EOL

START499ETR OBS 15/Apr/2015.pdf
RoHs Status
ROHS3 Compliant
Our certification
In stock: 3700

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Specifications

START499ETR Tech Specifications
STMicroelectronics - START499ETR technical specifications, attributes, parameters and parts with similar specifications to STMicroelectronics - START499ETR

Product Attribute Attribute Value  
Manufacturer STMicroelectronics  
Voltage - Collector Emitter Breakdown (Max) 4.5V  
Transistor Type NPN  
Supplier Device Package SOT-343  
Series -  
Power - Max 600mW  
Package / Case SC-82A, SOT-343  
Package Tape & Reel (TR)  
Product Attribute Attribute Value  
Operating Temperature 150°C (TJ)  
Noise Figure (dB Typ @ f) 3.3dB @ 1.8GHz  
Mounting Type Surface Mount  
Gain 15dB  
Frequency - Transition 1.9GHz  
DC Current Gain (hFE) (Min) @ Ic, Vce 160 @ 160mA, 4V  
Current - Collector (Ic) (Max) 600mA  
Base Product Number START499  

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status ROHS3 Compliant
Moisture Sensitivity Level (MSL) 1 (Unlimited)
REACH Status REACH Unaffected
ECCN OBSOLETE

Parts Introduction

Manufacturer Part Number

START499ETR

Manufacturer

STMicroelectronics

Introduction

The START499ETR is a high-performance NPN bipolar junction transistor (BJT) designed for radio frequency (RF) applications.

Product Features and Performance

Optimized for RF amplifier and oscillator circuits

Capable of operating at frequencies up to 1.9 GHz

Provides a typical gain of 15 dB and a low noise figure of 3.3 dB at 1.8 GHz

Product Advantages

Excellent high-frequency performance

Compact surface-mount package (SOT-343)

RoHS compliant

Key Technical Parameters

Collector-Emitter Breakdown Voltage (Max): 4.5 V

Collector Current (Max): 600 mA

Transition Frequency: 1.9 GHz

Power Dissipation (Max): 600 mW

Quality and Safety Features

Compliant with RoHS3 directive

Reliable and durable performance

Compatibility

Suitable for a wide range of RF circuit designs

Application Areas

RF amplifier circuits

Oscillator circuits

Wireless communication systems

Product Lifecycle

The START499ETR is an active product and is currently available. There are no immediate plans for discontinuation or replacement.

Key Reasons to Choose This Product

High-frequency performance for efficient RF circuit design

Compact surface-mount package for space-constrained applications

RoHS compliance for environmentally friendly use

Reliable and durable operation

Parts with Similar Specifications

The three parts on the right have similar specifications to STMicroelectronics START499ETR

Product Attribute START499ETR START499D START405TR STARTERKITMB91100
Part Number START499ETR START499D START405TR STARTERKITMB91100
Manufacturer STMicroelectronics STMicroelectronics STMicroelectronics Infineon Technologies
DC Current Gain (hFE) (Min) @ Ic, Vce 160 @ 160mA, 4V 150 @ 160mA, 3V 160 @ 5mA, 4V -
Mounting Type Surface Mount Surface Mount Surface Mount Socket
Frequency - Transition 1.9GHz - - -
Operating Temperature 150°C (TJ) 150°C (TJ) - -
Base Product Number START499 START499 START405 -
Noise Figure (dB Typ @ f) 3.3dB @ 1.8GHz - 1.1dB @ 1.8GHz -
Current - Collector (Ic) (Max) 600mA 1A 10mA -
Voltage - Collector Emitter Breakdown (Max) 4.5V 4.5V 4.5V -
Series - - - -
Power - Max 600mW 1.7W 45mW -
Gain 15dB 13dB ~ 14dB 19dB -
Supplier Device Package SOT-343 SOT-89 - -
Package / Case SC-82A, SOT-343 TO-243AA SC-82A, SOT-343 -
Transistor Type NPN NPN NPN -
Package Tape & Reel (TR) Tape & Reel (TR) Tape & Reel (TR) Box

START499ETR Datasheet PDF

Download START499ETR pdf datasheets and STMicroelectronics documentation for START499ETR - STMicroelectronics.

Datasheets
START499ETR.pdf
PCN Obsolescence/ EOL
START499ETR OBS 15/Apr/2015.pdf

Customer Reviews

Evaluation: 10 Articles

  • Jess***Jones
    Apr 17, 2026

    It offers good value for the price, and the specifications match the description. I’ve been using it for two days with no issues, and I’ll definitely buy it again if I need it in the future.

  • Mich***Smith
    Apr 17, 2026

    Shipping was on time, the component pins are neatly aligned, and I tested 10 of them with a multimeter—all readings were within the specified range. Highly recommended.

  • Aman***arris
    Apr 3, 2026

    It was great—the entire process, from placing the order to receiving the package, went very smoothly. The components were consistent, the price was fair, and I had a very pleasant shopping experience.

  • Mike***nch
    Apr 3, 2026

    Better than expected! The resistance and capacitance readings were spot-on, and it passed the test on the first try. The service was reliable, and the packaging was thoughtful—I highly recommend it.

  • Daic***K.
    Mar 23, 2026

    Very good. No issue after long time testing.

  • Kevi***.
    Mar 17, 2026

    Fast switching and stable output. Very satisfied with this IC

  • Daou***hekebkeb
    Jun 16, 2024

    I had a great experience purchasing items from Allelcoelec, I recommend

  • Uri ***al
    Jun 19, 2024

    Good comunication,
    Transpnt regarding the process and price.

  • Yaqu***l Ali
    Jun 19, 2024

    Providing reasonable prices, regular follow-up of orders, providing accurate and regular invoices, timely delivery of goods, excellent customer service and providing original goods and best quality materials.

  • Lea ***
    Jun 19, 2024

    Morrey was very helpful and right on top of things!
    He replied quickly to my RFQ. He was very courteous and professional.

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Shipment

Delivery Time

In-stock items can be shipped within 24 hours. Some parts will be arranged for delivery within 1-2 days from the date all items arrive at our warehouse. And Allelco ships order once a day at about 17:00, except Sunday. Once the goods are shipped, the estimated delivery time depends on the shipping methods and Delivery destination. The table below shows are the logistic time for some common countries.

Delivery Cost

  1. Use your express account for shipment if you have one.
  2. Use our account for the shipment. Refer to the table below for the approximate charges.
(Different time frame / countries / package size has different price.)

Delivery Method

  1. Global Common Shipment by DHL / UPS / FedEx / TNT / EMS / SF we support.
  2. Others more shipping ways, please get in touch with your customer manager.

Common Countries Logistic Time Reference
Region Country Logistic Time(Day)
America United States 5
Brazil 7
Europe Germany 5
United Kingdom 4
Italy 5
Oceania Australia 6
New Zealand 5
Asia India 4
Japan 4
Middle East Israel 6
DHL & FedEx Shipment Charges Reference
Shipment charges(KG) Reference DHL(USD$)
0.00kg-1.00kg USD$30.00 - USD$60.00
1.00kg-2.00kg USD$40.00 - USD$80.00
2.00kg-3.00kg USD$50.00 - USD$100.00
Note:
The above table is for reference only. There may have some data bias for the uncontrollable factors.
Contact us if you have any questions.

Payment Support

The payment method can be chosen from the methods shown below: Wire Transfer (T/T, Bank Transfer), Western Union, Credit card, PayPal.

Your Faithful Supply Chain Partner -

Contact us if you have any questions.

  1. Phone
    +00852 9146 4856

Certifications & Memberships

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START499ETR

STMicroelectronics
32D-START499ETR

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