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SD2933W
SD2933W
| Part Number | SD2933W |
|---|---|
| Manufacturer | STMicroelectronics (ST) |
| Category | RF Semiconductors > RF Power Transistors / RF DMOS |
| Description | N-channel RF DMOS Power Transistor, 50V Drain Voltage, 300W Output Power, 150MHz Max Frequency, Hermetic M177 Package, for HF/VHF/Low UHF ISM Amplifier |
| Stock Status | In stock |
| Origin | Original genuine parts |
Product Overview
SD2933W is an N-channel RF DMOS power transistor from STMicroelectronics. Optimized for HF, VHF and low UHF applications, it provides 300W continuous output power. The hermetic M-177 flange package offers outstanding heat dissipation for stable operation in ISM industrial equipment.
Core Advantages
High Power & Stable RF Performance
Minimum 20dB power gain at 30MHz, withstands 4:1 full-phase VSWR, suitable for high-power linear & pulsed RF amplification.
Robust Hermetic Packaging
M-177 screw-mounted metal ceramic hermetic package with low thermal resistance. Junction temperature up to 200°C for continuous operation in harsh environments.
Wide Application Compatibility
Common-source design, ideal for ISM RF heating, VHF base station amplifiers and high-power HF signal amplification circuits.
Key Specifications
| Brand | STMicroelectronics |
|---|---|
| RoHS Status | RoHS Compliant / Lead-Free / Green |
| EDA/CAD | Symbol, Footprint & 3D Model Available |
| Warranty | 1-Year Standard Quality Warranty |
| Package / Case | M177 Hermetic Ceramic Flange Package (TO-59R variant, screw mounting) |
| Mounting Type | Chassis Mount / Flange Bolt-Down Mounting |
| Surface Marking / Silkscreen | SD2933 W, Marking |
| Transistor Technology | N-Channel Enhancement Mode DMOS Silicon MOSFET |
| Frequency Range | HF / VHF / UHF Spectrum (DC to 150 MHz) |
| Output Power (Pout) | ≥300 W (@30MHz, Vdd=50V, Idq=250mA) |
| Operating Drain Voltage (Vdd) | 50 V DC (Nominal) |
| Power Gain (Gp) | Typ. ≥20 dB at 30MHz (Typical 23.5dB) |
| Drain Efficiency | Typ. 60% or higher |
| Thermal Resistance (Rth(j-c)) | Ultra-Low Thermal Resistance (0.27°C/W) |
| Maximum Junction Temperature | 200°C |
| Storage Temperature Range | -65°C ~ +150°C |
| Packaging Format | Tray / Anti-Static Protective Box |
| Drain-Source Breakdown Voltage (Vdss) | 125 V |
| Continuous Drain Current (Id) | 40 A |
| Total Power Dissipation (Pd) | 648 W (Tc=25°C) |
| Input Capacitance (Ciss) | Approx. 1000 pF @50V |
| Quiescent Drain Current (Idq) | Typical 250 mA |
| Configuration | Common Source |
| VSWR Tolerance | 4:1 full phase VSWR, non-destructive |
| Pin Count | 5 pins (1:Drain, 2/4/5:Source, 3:Gate) |
Typical Applications
- Industrial, Scientific, Medical (ISM) RF heating equipment
- VHF radio base station power amplifier
- High-power HF / VHF large signal amplification system
Order & Shipping Info
| Minimum Order Quantity (MOQ) | 1 Piece |
|---|---|
| Lead Time | Ship within 1-2 working days |
| Transit Time | 3-7 working days worldwide |
| Shipping Options | DHL, UPS, FedEx, EMS |
| Payment Options | T/T, PayPal, Credit Card, Western Union |
Technical Support
Please use our inquiry form to request datasheets, sample quotation, BOM matching or bulk pricing. We will reply within 24 hours.
Frequently Asked Questions
Q1: What is the alternative replacement model for SD2933W?
A: Pin-compatible alternatives are available based on power demands. Similar ST series: SD2931W, SD2934W. Saturated power and gain differ slightly, circuit matching adjustment is required after replacement.
Q2: Can SD2933W replace RF power transistors from other brands?
A: Direct cross-brand replacement is not recommended without testing. Competitor devices feature different pin definitions and internal impedance. Input/output matching network and bias current need readjustment.
Q3: What is the maximum operating frequency of SD2933W?
A: The maximum working frequency is 150MHz. Optimal performance lies within 30MHz~80MHz HF/VHF band. Gain and efficiency will drop gradually approaching 150MHz.
Q4: Does SD2933W belong to industrial-grade device?
A: Yes. Junction temperature range: -65°C ~ +200°C with hermetic packaging. It meets industrial continuous operation standards and widely applies to industrial ISM equipment.
Q5: What notes for power combining with multiple SD2933W?
A: Select devices with consistent Idq quiescent current to balance power distribution. Provide independent sufficient heat dissipation for each transistor to prevent thermal imbalance.
Q6: Why is SD2933W not suggested for operation above 150MHz?
A: Internal input capacitance restricts high-frequency characteristics. Above 150MHz, power gain and efficiency decline sharply and cannot reach designed output performance.
Q7: What are the differences between SD2933W and SD2934W?
A: Both share identical M177 package and pinout. SD2933W offers typical 300W output; SD2934W supports higher saturated power. Choose according to your equipment maximum power requirements.
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