STMicroelectronics

STP85N3LH5

STP85N3LH5 Description

The STP85N3LH5 from STMicroelectronics is an N-channel 30V, 80A power MOSFET housed in a TO-220AB package. Designed using STripFET™ V technology, it offers an ultra-low on-resistance (Rds(on)) of 5.4mΩ at 10V Vgs, ensuring minimal conduction losses and high efficiency in power-switching applications. With a maximum gate-source voltage (Vgs) of ±22V and a threshold voltage (Vgs(th)) of 2.5V, it provides robust gate drive compatibility. Although marked as obsolete, its performance metrics remain competitive, making it suitable for legacy designs or replacements.

STP85N3LH5 Features

• Low Rds(on): 5.4mΩ @ 40A, 10V reduces power dissipation and improves thermal performance.
• High Current Handling: 80A continuous drain current (Id) at 25°C (Tc) supports high-power applications.
• Fast Switching: Gate charge (Qg) of 14nC @ 5V and input capacitance (Ciss) of 1850pF @ 25V ensure efficient high-frequency operation.
• Robust Thermal Performance: 70W power dissipation (Pd) and 175°C junction temperature (TJ) rating enhance reliability under stress.
• Compliance: ROHS3 and REACH compliant, with MSL 1 (Unlimited) moisture sensitivity for easy handling.

STP85N3LH5 Applications

• Power Supplies: Ideal for DC-DC converters, SMPS, and voltage regulators due to low Rds(on) and high efficiency.
• Motor Control: Suitable for H-bridge motor drivers and PWM controllers in industrial and automotive systems.
• Load Switching: Efficient in high-current load switches and battery management systems (BMS).
• Legacy Systems: A reliable choice for repairs or upgrades in existing designs requiring 30V MOSFETs.

Conclusion of STP85N3LH5

The STP85N3LH5 excels in high-current, low-loss applications, leveraging STripFET™ V technology for superior performance. While obsolete, its low Rds(on), high current capability, and thermal resilience make it a viable option for power electronics engineers. Its compliance with environmental standards ensures broad usability, though newer alternatives may be preferred for forward-looking designs.