Product Datasheet
Download the attached PDF/image reference for pinout, specs, service notes, or bench reference.
Open Datasheet / PDFSD2918 RF MOSFET Final DRIVER
$89.00
Full Description & History
SD2918 RF MOSFET final driver / RF power transistor for high-frequency transmitter, amplifier, and radio repair work. Suitable for ham radio bench service, vintage RF equipment restoration, and hard-to-find RF component replacement where the SD2918 device is required. RF Boneyard listing includes part identification, bench notes, compatibility guidance, and repair-use context for technicians and experimenters.
Compatible Radios / Boards
Compatible Radios / Boards
STMicroelectronics SD2918 RF power MOSFET used in high-performance HF transceiver power amplifier driver applications. Confirmed in the Yaesu FTDX5000 Series PA-B amplifier unit (Q5514). Also identified for Yaesu FTDX9000 Series RF driver-stage servicing, pending model-specific parts verification. Suitable for compatible 50V RF amplifier circuits with matching electrical, mechanical, bias, and thermal requirements. Replacement requires proper bias adjustment and RF amplifier alignment according to the equipment service manual.
RF Boneyard Bench Notes
RF Boneyard Bench Notes
Detected Device Type:
N-channel RF MOSFET
Vgs(th) / Gate Threshold:
1.780 V
Vgs / Test Gate Drive:
8.0 V
Id / Test Current:
5.00 mA
Id / Test Range:
3.0 mA to 5.0 mA
Ig / Gate Leakage:
0 µA
gm / Transconductance:
28.3 mA/V
Rds(on):
1.0 ohms
Body Diode:
0.61 Vf
Shorts:
None detected / pending final confirmation
Analyzer Result:
Analyzer Behavior:
Behaved as MOSFET
Detected Device Type:
N-channel RF MOSFET
Displayed Terminals:
Gate / Source / Drain
Fault Indication:
No fault or short warning displayed by analyzer
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