CS45-08IO1

Overview

The IXYS CS45-08IO1 is a phase control thyristor designed for line frequency applications. It features an ISOPLUS 247 package with an isolated back surface and meets UL requirements (E153432). The device supports a maximum repetitive off-state voltage of 800 V and a maximum RMS on-state current of 75 A at a junction temperature of 140 °C. The average on-state current rating is 48 A when the case temperature is maintained at 75 °C under a 180° sine wave conduction angle. Non-repetitive surge current capability reaches 560 A for an 8.3 ms duration at zero volts, or 520 A for a 10 ms duration at 45 °C junction temperature.

Feature Summary

• Planar passivated chip construction ensures long-term stability of blocking currents and voltages.
• ISOPLUS 247 package design provides an isolated mounting screw hole for simplified installation.
• Epoxy material complies with UL 94V-0 standards for enhanced safety.

Applications

• Motor control systems
• Power converters
• AC power controllers
• Switch-mode and resonant mode power supplies
• Light and temperature control circuits

Procurement Notes

Verify component authenticity by checking manufacturer markings against official datasheet specifications. Confirm package type matches the ISOPLUS 247 standard and validate electrical ratings such as the 800 V blocking voltage and 75 A RMS current capacity. Ensure the isolated tab configuration aligns with system grounding requirements before finalizing procurement decisions.

Selection Notes

Select this component based on specific voltage and current demands within the circuit design. The 800 V rating suits applications requiring moderate blocking capabilities, while the 75 A RMS current handles significant loads. Consider thermal management strategies to maintain the case temperature below 75 °C for optimal average current performance. Verify gate trigger parameters match the driving circuit capabilities.

Part Context

This part belongs to the CS 45 series of phase control thyristors manufactured by IXYS. The series includes variants with different voltage ratings, such as the CS45-12IO1 for 1200 V and the CS45-16IO1 for 1600 V. All models share similar current ratings and utilize the JEDEC TO-247 or ISOPLUS 247 packages for standardized mounting and thermal dissipation in industrial power electronics.

Replacement Considerations

Direct replacements must match the 800 V rating and 75 A RMS current. Verify that alternative components support the same ISOPLUS 247 package dimensions and isolated tab configuration. Check compatibility with existing gate drive signals regarding trigger voltage and current thresholds.

FAQ

What is the isolation voltage rating between the leads and the tab?

The isolation voltage is rated at 2500 Vrms for one minute at 50/60 Hz between the leads and the tab.

How does the conduction angle affect the thermal resistance?

Thermal resistance from junction to case increases as the conduction angle decreases. For example, it rises from 0.62 K/W for DC operation to 0.817 K/W at a 30° conduction angle.

What is the maximum rate of rise of on-state current?

The critical rate of rise of on-state current ((di/dt)cr) is 150 A/µs under repetitive conditions with an on-state current of 40 A.