STT800N18P55XPSA1

Overview

The Infineon STT800N18P55XPSA1 is a soft starter module utilizing Advanced Medium Power Technology (AMPT) and pressure contact design. It features an integrated optimized heatsink for efficient thermal management. The device supports a repetitive peak forward off-state and reverse voltage of 1800 V, with a maximum overload current of 800 A at 21 seconds. Surge current capability reaches 6300 A for 10 ms. Key electrical parameters include a threshold voltage of 0.9 V, slope resistance of 0.83 mΩ, and a critical rate of rise of on-state current of 250 A/µs. Thermal resistance from junction to ambient is 0.196 K/W.

Feature Summary

• Pressure contact technology ensures high reliability without the need for thermal paste.
• Advanced Medium Power Technology (AMPT) provides optimized performance characteristics.
• Integrated optimized heatsink facilitates direct mounting and efficient cooling.

Applications

• Soft starters
• Bypass switches
• Power controllers
• Static switches

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm mechanical dimensions and terminal configurations. Ensure that the gate trigger requirements align with the specified maximum gate trigger current and voltage limits. Confirm compliance with RoHS directives and check for any specific handling instructions regarding the pressure contact interface during installation.

Selection Notes

Select this module based on the required 1800 V blocking voltage and 800 A overload capacity. Evaluate the thermal resistance values to ensure adequate heat dissipation for the intended duty cycle. Consider the critical di/dt rating when designing the gate drive circuitry to prevent device failure during turn-on. Verify that the operating temperature range meets the environmental conditions of the application.

Part Context

This component belongs to the STT series of soft starter modules manufactured by Infineon Technologies. These modules are designed for medium power applications requiring robust thyristor solutions. The series utilizes silicon pellet technology with pressure contacts, distinguishing it from solder-bonded alternatives in terms of assembly and thermal stress management.

Replacement Considerations

Consult official Infineon documentation for confirmed substitute part numbers within the STT series or other compatible thyristor modules. Ensure that any replacement matches the voltage, current, and thermal specifications exactly.

FAQ

What is the maximum junction temperature after start?

The maximum junction temperature after start is 155 °C, provided the reverse voltage is less than 80% of the rated reverse voltage.

What is the critical rate of rise of off-state voltage?

The critical rate of rise of off-state voltage is 1000 V/µs.

What is the holding current specification?

The maximum holding current is 300 mA at a junction temperature of 25 °C.