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START499D
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We source brand-new parts via original manufacturers, franchised distributors or verified independent channels, with incoming inspection. Channel type is confirmed on your quote.

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Reference price and stock shown as of 2026-10-29. Confirm live availability and unit price via RFQ before placing a PO.

START499D

RF TRANS NPN 4.5V SOT89
STMicroelectronics · Transistors - Bipolar (BJT) - RF · BOM Matching
Mfr. Part Number
START499D
Manufacturer
STMicroelectronics
Package / Case
TO-243AA
Datasheet
Datasheet
Description
RF TRANS NPN 4.5V SOT89
RoHS Status
Lead Free / RoHS Complaint
Availability
Sourcing — Lead time quoted on request (often 3–15 business days by channel)
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START499D
STMicroelectronics
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In Stock8,204
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Reference Price
QuantityPrice
Prices are for reference only. The final transaction is subject to confirmation.
As of 2026-10-29 · Valid as reference until 2026-11-05 · Request RFQ for live stock.
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Specification Summary

Package / Case
TO-243AA
Supplier Device Package
SOT-89
Voltage - Collector Emitter Breakdown (Max)
4.5V
Current - Collector (Ic) (Max)
1A
DC Current Gain (hFE) (Min) @ Ic, Vce
150 @ 160mA, 3V
Operating Temperature
150°C (TJ)
Mounting Type
Surface Mount
Gain
13dB ~ 14dB
Full specifications are listed below. Need alternates or BOM matching? Read BOM guide · Request a quote
Stock status: Sourcing — Lead time quoted on request (often 3–15 business days by channel)
Shortage / allocation / EOL lines may need longer — ask via RFQ.
Reference price and stock shown as of 2026-10-29. Confirm live availability and unit price via RFQ before placing a PO.
Lead time FAQ Authenticity FAQ MOQ FAQ
Specifications
Product Description
Purchase & Inquiry
Noise Figure (dB Typ @ f)
-
Mounting Type
Surface Mount
Operating Temperature
150°C (TJ)
DC Current Gain (hFE) (Min) @ Ic, Vce
150 @ 160mA, 3V
Frequency - Transition
-
Transistor Type
NPN
Current - Collector (Ic) (Max)
1A
Gain
13dB ~ 14dB
Power - Max
1.7W
Supplier Device Package
SOT-89
Voltage - Collector Emitter Breakdown (Max)
4.5V
Package / Case
TO-243AA
RF TRANS NPN 4.5V SOT89
Brand Introduction
STMicroelectronics is a global independent semiconductor company and is a leader in developing and delivering semiconductor solutions across the spectrum of microelectronics applications. An unrivaled combination of silicon and system expertise, manufacturing strength, Intellectual Property (IP) portfolio and strategic partners positions the Company at the forefront of System-on-Chip (SoC) technology and its products play a key role in enabling today's convergence trends.
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Buying FAQ — START499D

Answer-first notes for stock, authenticity, lead time and quoting. Marked up as FAQPage.

How do I buy START499D from Yingxinyuan?

Open RFQ with quantity and target date, or upload a BOM that includes START499D. We reply with stock, channel note, reference price and ETA.

Is the listed price final?

Prices on the product page are reference only. Confirm unit price, currency and validity via RFQ before placing a PO.

How fresh is the stock figure?

Stock and reference price show an as-of date on the page. Ask for a live confirm — allocation lines can change daily.

How do you source authentic parts?

We source from manufacturers, franchised distributors and verified independents, then inspect incoming lots. See /anti-counterfeit/.

What is a typical lead time?

In-stock lines often ship within 24–48 hours after confirmation. Sourcing / allocation ETAs are quoted per line — see /lead-time-shipping/.
BOM matching · Anti-counterfeit · Lead time & shipping

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