5KP85A – TBC

Overview

The Littelfuse 5KP85A is a high-power, unidirectional Transient Voltage Suppressor (TVS) diode designed for robust protection against electrostatic discharge (ESD) and other transient overvoltage events. Its critical operational characteristic is its ability to absorb significant peak pulse power (5 kW) while clamping voltages to a safe level (137 V) for an 85 V working voltage. A key design consideration when implementing this device is managing its thermal dissipation; while rated for 5 kW, sustained high-energy transients can exceed its thermal limits, necessitating careful consideration of heat sinking and duty cycle in demanding applications to prevent premature device failure.

Key Features

• Working Voltage: 85 V
• Peak Pulse Power Dissipation (Pppm): 5 kW
• Clamping Voltage (V_C): 137 V at 10/1000µs
• Peak Pulse Current (I_PP): 37.2 A at 10/1000µs
• ESD Rating (Contact/Air): 30 kV
• Operating Temperature Range: -55°C to +175°C
• Package: P600-2 (Axial)

Applications

The component is engineered for deployment in systems requiring high reliability and performance under specific operating conditions. It provides functional stability across the stated design envelope.

• Protection of AC power lines and DC power buses in industrial equipment
• Robust ESD suppression for sensitive communication interfaces (e.g., RS-485)
• Transient voltage mitigation in automotive electronic control units (ECUs)
• Overvoltage clamping for high-power switching circuits and motor drives