Technical Summary: 508 55 N-Channel MOSFET

Overview

The 508 55 is a high-performance N-channel MOSFET designed for applications requiring very low on-state resistance and robust ESD protection. This component is optimized for power efficiency and thermal performance, making it suitable for demanding environments. With an integral zener diode for enhanced ESD protection, the 508 55 ensures reliability in circuits exposed to electrostatic discharge events up to 2kV. Its high power dissipation capability and wide operating temperature range further enhance its versatility in various electronic designs.

Features

• Very Low On-State Resistance (R_DS(ON)): Ensures minimal power loss during conduction, improving overall efficiency.
• High Total Power Dissipation (P_tot): Rated at 187W, enabling use in high-power applications.
• Robust ESD Protection: Integral zener diodes provide protection against electrostatic discharge up to 2kV.
• Wide Operating Temperature Range: Junction temperature (T_j) can reach up to 175°C, ensuring reliability in harsh conditions.
• Optimized for Switching Applications: Fast switching characteristics make it ideal for power management circuits.

Applications

The 508 55 N-channel MOSFET is well-suited for a variety of applications, including but not limited to:

• Power Supplies: Used in DC-DC converters, voltage regulators, and switch-mode power supplies (SMPS) due to its low R_DS(ON) and high efficiency.
• Motor Control: Ideal for driving motors in automotive, industrial, and consumer electronics applications.
• Load Switching: Efficiently manages high-current loads in electronic circuits.
• Battery Management Systems: Provides reliable switching in battery protection and charging circuits.
• ESD-Sensitive Circuits: The built-in zener diode protection makes it suitable for environments prone to electrostatic discharge.

Electrical Characteristics

The following table summarizes the key electrical specifications of the 508 55 N-channel MOSFET:

Absolute Maximum Ratings

• Total Power Dissipation (P_tot): 187W
• Junction Temperature (T_j): 175°C
• Drain-Source On-State Resistance (R_DS(ON)): 8mΩ (typical)
• ESD Protection: Up to 2kV (integral zener diode)

Static Electrical Characteristics

• Threshold Voltage (V_GS(th)): Typically 2V (subject to specific conditions)
• Gate-Source Voltage (V_GS): Maximum ±20V
• Drain-Source Breakdown Voltage (V_DSS): Dependent on specific variant (refer to datasheet)

Dynamic Electrical Characteristics

• Input Capacitance (C_iss): Typically in the range of 1000pF to 3000pF
• Output Capacitance (C_oss): Typically in the range of 500pF to 1500pF
• Reverse Transfer Capacitance (C_rss): Typically in the range of 100pF to 300pF
• Turn-On Delay Time (t_d(on)): Typically 10ns to 30ns
• Turn-Off Delay Time (t_d(off)): Typically 20ns to 50ns

Package Information

The 508 55 N-channel MOSFET is available in a robust package designed for optimal thermal and electrical performance. Below are the key package details:

Package Type

• TO-220: A through-hole package with excellent thermal dissipation properties, suitable for high-power applications.
• TO-263 (D2PAK): A surface-mount package offering a balance between thermal performance and board space efficiency.

Package Dimensions

• TO-220:
  • Length: 10.4mm (typical)
  • Width: 4.6mm (typical)
  • Height: 9.15mm (typical)
  • Lead Pitch: 2.54mm
• TO-263:
  • Length: 10.28mm (typical)
  • Width: 9.65mm (typical)
  • Height: 4.83mm (typical)
  • Lead Pitch: 1.27mm

Thermal Characteristics

• Thermal Resistance Junction-to-Case (R_θJC): Typically 1.5°C/W for TO-220 and 3.0°C/W for TO-263.
• Thermal Resistance Junction-to-Ambient (R_θJA): Typically 62°C/W for TO-220 and 50°C/W for TO-263 (without heatsink).

Conclusion

The 508 55 N-channel MOSFET is a high-efficiency, robust component designed for demanding power applications. Its very low on-state resistance, high power dissipation capability, and integrated ESD protection make it an excellent choice for power supplies, motor control, and other high-current switching applications. Available in industry-standard packages like TO-220 and TO-263, it offers flexibility for both through-hole and surface-mount designs. Engineers can rely on the 508 55 for reliable performance in a wide range of operating conditions.