Product Overview
Samsung IRF720 400V 3.3A N-Channel Power Transistor TO-220
Condition
New old stock (NOS). Unused component inventory. Markings on body: Samsung logo, KOREA, 345, IRF720. Leads are factory trimmed / short through-hole style with clean tinned finish.
Same or next business day shipping from our Idaho warehouse. Reliable parts since 1999. Honest pricing, no nonsense.
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Product Overview
The Samsung IRF720 is an N-channel enhancement-mode power MOSFET designed for high-voltage, fast-switching applications. Housed in a standard TO-220AB package with a metal drain mounting tab, it provides a 400V drain-to-source breakdown rating and handles continuous drain currents up to 3.3A at 25°C case temperature. With an on-state resistance of 1.8 ohms and 50W maximum power dissipation, this transistor serves as an exact replacement for legacy power supplies, switching regulators, motor controls, and audio amplifier circuits.
Key Features
- 400V drain-to-source breakdown voltage (V_DSS)
- 3.3A continuous drain current (I_D at 25°C)
- 1.8 ohm maximum static drain-source on-resistance (R_DS(on))
- 50W total power dissipation rating (P_D at 25°C)
- Standard TO-220AB 3-pin configuration: Pin 1 Gate, Pin 2 / Tab Drain, Pin 3 Source
- Short through-hole lead styling
Applications
- Replacing failed power switching transistors in legacy switch-mode power supplies (SMPS)
- High-voltage solid-state switching in relay drivers and DC-DC converters
- Bench repair of vintage audio equipment, motor drives, and industrial controls
- Hobbyist and maker high-voltage switching projects, solid-state Tesla coils, and strobe drivers
Frequently Asked Questions
What is the lead length on these MOSFETs?
These units feature short, trimmed through-hole leads as visible on the component body, suitable for direct PCB mounting or socket insertion.
What is the pinout configuration?
Following industry-standard TO-220 MOSFET layout, looking at the front marked face with pins pointing down: Pin 1 (left) is Gate, Pin 2 (center) and the metal mounting tab are Drain, and Pin 3 (right) is Source.
Why buy individual components here rather than a bulk lot?
You can purchase the exact quantity needed for your repair or build without paying for reels or multi-packs of surplus parts you will not use. Every order ships for a flat rate of $8, upgrades to free standard shipping when your cart reaches $28, and leaves our Idaho warehouse the same or next business day.
Solid high-voltage silicon from the era of honest overbuilding. Drop it onto the board, cinch the tab down, and watch the circuit power right back up.
Shipping? $8 flat rate, free once your order passes $28 - and it leaves the Idaho warehouse the same or next business day.
