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SLP740C N-Channel MOSFET TO-220 400V 10.5A 5PCS | High-Voltage Power Switching
SLP740C N-Channel MOSFET TO-220 400V 10.5A 5PCS | High-Voltage Power Switching
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SLP740C N-Channel MOSFET — TO-220, 400V 10.5A (5PCS)
The SLP740C is a high-voltage N-channel power MOSFET in the industry-standard TO-220 through-hole package, rated at 400V drain-source voltage (VDS) and 10.5A continuous drain current (ID). Designed for demanding power switching applications including switch-mode power supplies (SMPS), motor drivers, inverters, and industrial power electronics where high blocking voltage and reliable switching performance are critical. The TO-220 package provides excellent thermal dissipation when mounted to a heatsink, enabling sustained high-power operation.
Specifications
| Part Number | SLP740C |
| Channel Type | N-Channel |
| Package | TO-220 (through-hole) |
| Drain-Source Voltage (VDS) | 400V |
| Continuous Drain Current (ID) | 10.5A |
| Gate-Source Voltage (VGS) | ±20V (max) |
| Condition | New, original |
| Quantity | 5PCS per pack |
| Origin | Mainland China |
TO-220 Pin Configuration
| Pin | Function |
|---|---|
| Pin 1 (left) | Gate (G) |
| Pin 2 (centre) | Drain (D) |
| Pin 3 (right) | Source (S) |
| Tab | Drain (D) — connected to heatsink |
Why N-Channel MOSFETs for High-Voltage Switching?
N-channel MOSFETs are the preferred choice for power switching applications because:
- Lower RDS(on) — N-channel devices have lower on-resistance than equivalent P-channel devices, reducing conduction losses
- Higher electron mobility — faster switching speeds for high-frequency SMPS applications
- High voltage blocking — 400V VDS provides adequate margin above 230VAC mains peak voltage (~325V) for mains-connected power supplies
- TO-220 thermal performance — the metal tab allows direct heatsink mounting for sustained high-power operation
Key Features
- ✅ 400V VDS rating — suitable for mains-connected SMPS and high-voltage DC bus applications
- ✅ 10.5A continuous drain current — handles substantial load currents in power switching circuits
- ✅ TO-220 package — industry-standard through-hole package, heatsink-mountable for high-power operation
- ✅ N-channel enhancement mode — normally off, gate-voltage controlled for reliable digital switching
- ✅ 5PCS pack — cost-effective for prototyping and small production runs
- ✅ New original parts — genuine SLP740C, not remarked or counterfeit
Common Applications
- Switch-mode power supply (SMPS) primary switching transistor
- Flyback converter power switch
- DC motor driver high-side and low-side switching
- Inverter and UPS power stage
- Electronic ballast for fluorescent and HID lamps
- Induction heater power switching
- Solar inverter power stage
- High-voltage DC-DC converter switching element
Heatsink Mounting Notes
For sustained operation near rated current, mount the SLP740C to an appropriate heatsink using:
- Thermal interface material (thermal pad or thermal paste) between the TO-220 tab and heatsink
- An insulating mica or silicone pad if the heatsink is at a different potential than the drain
- An M3 screw and nut to secure the device to the heatsink
Frequently Asked Questions
Q: What gate drive voltage does the SLP740C require?
A: The SLP740C is a logic-level or standard gate drive MOSFET. Refer to the datasheet for the specific VGS(th) threshold voltage and recommended gate drive voltage for full enhancement. Typical gate drive is 10–15V for full RDS(on) performance.
Q: Can I use this in a 230VAC mains-connected circuit?
A: Yes. The 400V VDS rating provides adequate margin above the 230VAC mains peak voltage (~325V peak). Always include appropriate snubber circuits and gate drive protection in mains-connected designs.
Q: What is the maximum junction temperature?
A: Refer to the SLP740C datasheet for TJ(max). Most TO-220 power MOSFETs are rated to 150°C junction temperature. Ensure adequate heatsinking to keep TJ well below this limit in continuous operation.
Package Contents
- 5× SLP740C N-Channel MOSFET TO-220 (400V 10.5A)
