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Infineon Technologies BFR181E6327HTSA1 — DC-DC Power Modules

Infineon BFR181E6327HTSA1 RF Transistor NPN, 8 GHz

MPNBFR181E6327HTSA1
End of Life

Infineon BFR181E6327HTSA1 NPN RF transistor, 12 V Vceo, 8 GHz transition frequency, 18.5 dB gain, 0.9 dB noise figure, SOT-23-3 package.

$0.47Ref. price · indicative, final on quote
Infineon Technologies BFR181E6327HTSA1 datasheet (PDF)
PackagingTO-236-3, SC-59, SOT-23-3
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

BFR181E6327HTSA1 specifications
ParameterValue
MountingSurface Mount
FET typeNPN
Voltage - collector emitter breakdown12V
Current - collector (Ic)20mA
DC current gain (hFE) (Min) @ ic, vce70 @ 5mA, 8V
Power - max175mW
Frequency8GHz
Operating temperature150°C (TJ)
Gain18.5dB
PackageTape & Reel (TR); Cut Tape (CT)
CaseTO-236-3, SC-59, SOT-23-3
Noise figure (dB typ @ f)0.9dB ~ 1.2dB @ 900MHz ~ 1.8GHz

Product details

RF front-end staple in a SOT-23-3

The Infineon BFR181E6327HTSA1 is an NPN silicon RF transistor. It delivers 18.5 dB small-signal gain with a noise figure of 0.9 dB to 1.2 dB across 900 MHz to 1.8 GHz. The 8 GHz transition frequency gives headroom for gain in the low-GHz range.

The 12 V collector-emitter breakdown sets the supply rail ceiling. Maximum collector current is 20 mA and power dissipation is 175 mW. Minimum DC current gain is 70 at 5 mA, 8 V.

PG-SOT23 package — board footprint and thermal

Supplier device package is PG-SOT23, the Infineon designation for the standard SOT-23-3. The TO-236-3 / SC-59 / SOT-23-3 case codes all map to the same three-lead footprint. Surface-mount assembly with the collector on the tab; the 150 °C junction temperature rating is typical for this class, but the 175 mW power limit means the board copper and airflow matter if you run near the maximum. No heatsink — just the PCB pad.

Infineon lists the BFR181E6327HTSA1 as Active product status. ROHS3 compliant.

Frequently asked questions

Is BFR181E6327HTSA1 obsolete?

No. Infineon lists the product status as Active. There is no end-of-life or last-time-buy notice in effect for this order code.

What is the maximum frequency of BFR181E6327HTSA1?

The transition frequency (fT) is 8 GHz. That is the frequency at which the current gain drops to unity — practical usable gain extends well into the 2.4 GHz ISM band with appropriate matching.

Is BFR181E6327HTSA1 RoHS compliant?

Yes. Infineon certifies this part as ROHS3 Compliant.

Does BFR181E6327HTSA1 have a datasheet?

Yes, the full Infineon datasheet is available. The part carries the standard Infineon BFR181 series documentation covering S-parameters, noise parameters, and application circuits for the SOT-23 package.

What is the equivalent of BFR181E6327HTSA1?

The closest functional equivalent within the Infineon portfolio is the BFR181WH6327XTSA1 — same BFR181 die, same 8 GHz fT, same 0.9 dB noise figure, same 12 V rating, in an identical SOT-23-3 package. The suffix difference indicates tape-and-reel packaging variant; the two are electrically interchangeable for a BOM second-source qualification.