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The following are detailed specifications for the 2SK3377 chip:
Technical Parameters
- Transistor Type: N-Channel MOSFET
- Drain-Source Voltage (VDSS): 60 V (Min)
- Gate-Source Voltage (VGSS): ±20 V
- Continuous Drain Current (ID): 20 A (@ TC = 25°C)
- Pulsed Drain Current (IDP): 80 A
- Maximum Power Dissipation (PD): 30 W (@ TC = 25°C)
- On-Resistance (RDS(on)):
- Max: 44 mΩ (@ VGS = 10 V, ID = 10 A)
- Typical value is lower
- Gate Threshold Voltage (VGS(th)): 1.0 V – 2.5 V
- Input Capacitance (Ciss): 1200 pF (Typ)
- Output Capacitance (Coss): 150 pF (Typ)
- Reverse Transfer Capacitance (Crss): 70 pF (Typ)
- Rise Time (tr): 170 ns (Typ)
- Fall Time (tf): 100 ns (Typ)
- Reverse Recovery Time (trr): 50 ns (Typ)
- Operating Junction Temperature Range: -55°C to +150°C
- Storage Temperature Range: -55°C to +150°C
- Avalanche Energy (EAS): 100% Avalanche Tested
- Package Thermal Resistance:
- RθJC (Junction-to-Case): 4.17°C/W
- RθJA (Junction-to-Ambient, Standard Pad): Approx. 50°C/W – 80°C/W
Key Features
- Low On-Resistance: RDS(on) ≤ 44 mΩ, reducing conduction losses
- High-Speed Switching: Suitable for high-frequency DC-DC applications
- Low Gate Charge: Reduces drive losses
- - Avalanche Capability: Built-in avalanche diode absorbs overvoltage during inductive load turn-off.
- 100% Avalanche Tested: Ensures consistency across production batches.
- Low Lot-to-Lot Variation: Guarantees device performance and reliability.
Pin Definitions (TO-252 / DPAK)
Pin | Name | Function
----|-------|----------------------------------------------------
1 | Gate (G) | Gate; Control Input
2 | Drain (D) | Drain; Power Output (Heat sink is internally connected to the Drain)
3 | Source (S) | Source; Ground / Return Path
Typical Application Circuits
1. DC-DC Buck Converter
```
VIN (+12V)
│
├──┬──┐
│ │ │
│ C1 │ 100µF
│ │ │
│ └──┤
│ │
├─────┤
│ │
├─D───┤──→ VOUT (+5V)
│ 2SK│ │
│3377 │ L1
├─G───┤ │ 33µH
│ │ │
PWM │ ├──┬──┐
Control │ │ C2│ 220µF
│ │ │ │ │
└──┬──┘ │ └──┘
│ │
S │
│ │
└───────┘
│
GND
```
- Features: Utilizes the 2SK3377's low RDS(on) and high-speed switching characteristics to achieve high-efficiency step-down conversion.
2. Motor Driver (H-Bridge Half-Arm)
```
VCC (+12V)
│
├──┬──┐
│ │ │
│ 2SK│ N-Channel High-Side Switch
│ 3377│
│ D │
├──┬──┤
│ │
├──┴──→ Motor
│
│ 2SK3377 or Complementary P-Channel
│ Low-Side Switch (Requires Level-Shifting Driver)
│
GND
```
- Features: Used for driving motors—such as fuel injectors, throttle bodies, and cooling fans—within automotive ECUs. 3. Power Switch (High-Side or Low-Side)
```
VIN (+12V)
│
├──┬──┐
│ │ │
│ 2SK│
│ 3377│
│ D │
├──┬──┤
│ │
├──┴──→ Load
│
S
│
│
GND
```
- Features: Low-side switching application; the gate is driven directly by a 5V/3.3V MCU.
Key Characteristic Curves
Parameter Conditions Typical Value
RDS(on) vs VGS ID = 10 A 44 mΩ @ VGS = 10 V
RDS(on) vs ID VGS = 10 V 35 mΩ @ ID = 5 A
VGS(th) vs TJ - -3 mV/°C Temperature Coefficient
Ciss vs VDS VGS = 0 V 1200 pF @ VDS = 25 V
Precautions
- Compatibility: The 2SK3377 is a standard N-channel MOSFET with a gate threshold voltage (VGS(th)) of 1.0–2.5V, making it suitable for 5V or 10V gate drive applications. When driven by 3.3V logic, the VGS(th) margin should be carefully verified.
- Mounting Instructions:
- For the TO-252 / DPAK package, the heatsink tab is internally connected to the Drain terminal; therefore, when designing the PCB layout, consider either providing electrical isolation or ensuring the heatsink operates at a common potential.
- A copper pad area of ≥ 6 cm² is recommended to minimize thermal resistance.
- For high-current applications (>10A), it is recommended to add thermal vias to conduct heat to internal copper layers or to an external heatsink.
- For inductive loads (e.g., motors, solenoids), a freewheeling diode must be connected in parallel. While the MOSFET's internal body diode can be utilized, its reverse recovery speed is relatively slow; therefore, connecting an external fast-recovery diode is recommended.
- Soldering Temperatures: For reflow soldering, the peak temperature should not exceed 260°C for a duration of ≤ 10 seconds; for manual soldering, the iron tip temperature should not exceed 350°C for a duration of ≤ 5 seconds. - Technical Support: For further technical support, it is recommended to refer to Renesas Application Notes or contact an authorized distributor.
Summary
The 2SK3377 is a classic N-channel power MOSFET manufactured by Renesas (formerly NEC). Housed in a TO-252 (DPAK) surface-mount package, it features a 60V breakdown voltage, a continuous current rating of 20A, and extremely low on-resistance (44 mΩ @ VGS = 10V). Its high-speed switching characteristics, 100% avalanche testing, and low gate charge make it highly practical and reliable for applications such as automotive ECUs, motor drives, DC-DC converters, and industrial control systems; it stands as a widely adopted power switching solution within the 60V/20A class.
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