STI38N65M5 - 650V 38A N-Channel Power MOSFET | STMicroelectronics
MPN: STI38N65M5 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.42 | $3.42 |
| 10 | $3.08 | $30.80 |
| 100 | $2.74 | $274.00 |
| 500 | $2.46 | $1,230.00 |
| 1,000 | $2.19 | $2,190.00 |
Drop-in alternatives for STI38N65M5 β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
STW38N65M5
β Drop-Inπ Reference alternative (not in catalog)
STI38N65M5-1
β Drop-Inπ Reference alternative (not in catalog)
IPW65R041CFD
β Drop-Inπ Reference alternative (not in catalog)
FCH38N65
β Drop-Inπ Reference alternative (not in catalog)
TK38N65W5
β Drop-Inπ Reference alternative (not in catalog)
STI38N65M5 Maximum Ratings & Electrical Characteristics
| Polarity | N-Channel |
| Drain-Source Voltage (VDS) | 650 V |
| Continuous Drain Current (ID) at 25Β°C | 38 A |
| Continuous Drain Current (ID) at 100Β°C | 24 A |
| Pulsed Drain Current (IDM) | 152 A |
| Gate-Source Voltage (VGS) | Β±30 V |
| On-Resistance (RDS(on)) | 0.099 ohm (typical) |
| Total Gate Charge (Qg) | 110 nC |
| Input Capacitance (Ciss) | 4200 pF |
| Output Capacitance (Coss) | 180 pF |
| Reverse Transfer Capacitance (Crss) | 12 pF |
| Avalanche Energy (EAS) | 1.2 J |
| Operating Temperature Range | -55Β°C to +150Β°C |
| Package | TO-247 |
| Mounting Type | Through Hole |
| RoHS Status | Compliant |
| Halogen Free | Yes |
STI38N65M5 Pin Configuration
| Pin 1 | Gate β Gate terminal for controlling the MOSFET |
| Pin 2 | Drain β Drain terminal, connected to the load |
| Pin 3 | Source β Source terminal, connected to ground |
Safe Operating Area
Typical Applications
STI38N65M5 is suitable for 6 applications: Switch-Mode Power Supplies (SMPS), Power Factor Correction (PFC), Solar Inverters, Motor Drives, Uninterruptible Power Supplies (UPS), Welding Equipment.
Switch-Mode Power Supplies (SMPS)
The STI38N65M5 is ideal for SMPS due to its high voltage rating (650V) and low on-resistance (0.099 ohm), which reduce conduction losses and improve efficiency. In a typical flyback or forward converter, the MOSFET switches at high frequency, and its fast switching characteristics (Qg=110nC) minimize switching losses. The TO-247 package allows efficient heat dissipation, enabling reliable operation in power supplies up to several kilowatts. Compared to IGBTs, the MOSFET offers faster switching and lower losses at moderate frequencies, making it a preferred choice for SMPS designs.
Recommended
Power Factor Correction (PFC)
In PFC circuits, the STI38N65M5 operates as a boost switch, shaping the input current to be sinusoidal and in phase with the voltage. Its 650V rating handles the high output voltage (typically 400V) with margin, while the low RDS(on) minimizes conduction losses. The device's avalanche energy rating (1.2J) ensures robustness during line transients. The fast switching speed allows operation at frequencies above 100kHz, reducing the size of magnetic components. The TO-247 package facilitates mounting on heatsinks, which is essential for dissipating the heat generated in continuous conduction mode.
Recommended
Solar Inverters
The STI38N65M5 is well-suited for solar inverter applications, where it is used in DC-DC boost converters and DC-AC inverters. Its high voltage rating (650V) accommodates the high DC bus voltages (up to 600V) in photovoltaic systems. The low on-resistance reduces power losses, improving the overall efficiency of the inverter, which is critical for maximizing energy harvest. The device's ruggedness, including avalanche capability, ensures reliable operation in outdoor environments with varying loads and temperatures. The TO-247 package allows for effective thermal management, which is essential for continuous operation in high ambient temperatures.
Recommended
Motor Drives
In motor drive applications, the STI38N65M5 is used in the inverter stage to convert DC to AC for driving AC motors. Its high current rating (38A) and voltage rating (650V) make it suitable for industrial motor drives up to a few kilowatts. The low RDS(on) reduces conduction losses, while the fast switching speed enables high PWM frequencies, resulting in smoother motor control and reduced acoustic noise. The device's avalanche rating ensures it can handle inductive loads during switching transients. The TO-247 package is commonly used in motor drive modules, allowing for easy mounting on heatsinks.
Recommended
Uninterruptible Power Supplies (UPS)
The STI38N65M5 is used in UPS systems for battery charging and inverter stages. Its high voltage rating (650V) allows it to handle the DC bus voltage (typically 400V) in online UPS systems. The low on-resistance minimizes losses, improving the efficiency of the UPS and extending battery life. The device's fast switching capability enables high-frequency operation, reducing the size of transformers and inductors. The TO-247 package provides good thermal performance, which is important for continuous operation in UPS applications.
Recommended
Welding Equipment
In welding equipment, the STI38N65M5 is used in the inverter stage to generate high-frequency AC for the welding arc. Its high current (38A) and voltage (650V) ratings make it suitable for the demanding conditions of welding, where high currents are switched at high frequencies. The low RDS(on) reduces power losses, improving the efficiency of the welder. The device's ruggedness, including avalanche capability, ensures reliable operation under harsh conditions. The TO-247 package allows for effective cooling, which is essential for continuous welding operations.
Recommended
Recommended Products Summary
Engineering reference data for STI38N65M5 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | STW38N65M5 | IPW65R041CFD | FCH38N65 |
|---|---|---|---|---|
| Package | TO-247 | TO-247 | TO-247 | TO-247 |
| Brand | STMicroelectronics | STMicroelectronics | Infineon | onsemi |
| Drain-Source Voltage (VDS) | 650 V | 650 V | 650 V | 650 V |
| Continuous Drain Current (ID) at 25Β°C | 38 A | 38 A | 38 A | 38 A |
| On-Resistance (RDS(on)) | 0.099 ohm | 0.099 ohm | 0.041 ohm | 0.099 ohm |
| Total Gate Charge (Qg) | 110 nC | 110 nC | 110 nC | 110 nC |
| Avalanche Energy (EAS) | 1.2 J | 1.2 J | 1.2 J | 1.2 J |
| Operating Temperature Range | -55Β°C to +150Β°C | -55Β°C to +150Β°C | -55Β°C to +150Β°C | -55Β°C to +150Β°C |
Key Differentiators
- Low on-resistance (0.099 ohm) for high efficiency (vs IPW65R041CFD)
- High avalanche energy (1.2 J) for ruggedness (vs FCH38N65)
- Proven MDmesh M5 technology (vs TK38N65W5)
Design Notes
The STI38N65M5 in TO-247 package has a junction-to-case thermal resistance of 0.5Β°C/W. For a power dissipation of 100W, the junction temperature rise is 50Β°C above case temperature. Ensure adequate heatsinking to keep the junction temperature below 150Β°C. Use thermal compound and proper mounting torque (typically 0.5-0.6 Nm) to minimize thermal resistance.
For through-hole TO-247, ensure the PCB has adequate copper area for the drain tab, which is electrically connected to the drain. Use multiple vias to connect the tab to inner layers for better thermal spreading. Keep the gate trace short and away from high dv/dt nodes to avoid parasitic coupling.
Do not exceed the gate-source voltage rating of Β±30V. Use a gate driver with appropriate output voltage (typically 10-15V) and consider adding a gate resistor (e.g., 10 ohm) to dampen ringing. Ensure the device is fully turned on to minimize on-resistance and avoid operating in the linear region for extended periods.
Compliance Information
RoHS compliant and halogen-free per STMicroelectronics datasheet. Not AEC-Q100 qualified as it is not an automotive-grade part.