DD240KB80

Overview

The SanRex DD240KB80 is a silicon power diode module designed for high-current rectification. It features an isolated mounting base and two series-connected diode chips within a single package. The device supports a repetitive peak reverse voltage of 800 V and a non-repetitive peak reverse voltage of 960 V. It provides an average forward current rating of 240 A at Tc=95°C and handles a surge forward current of 5000 A. The maximum forward voltage drop is 1.35 V at 750 A, with a thermal resistance from junction to case of 0.17 °C/W. Operating temperatures range from -40 °C to +150 °C.

Feature Summary

• Features an electrically isolated mounting base for simplified heatsink construction
• Contains two diode chips connected in series within one package
• Utilizes highly reliable glass passivated semiconductor chips
• Provides high surge current capability for robust circuit protection

Applications

• Various rectifier circuits
• Battery chargers
• DC motor drives

Procurement Notes

Verify the specific part number suffix against official datasheets to confirm voltage ratings, as the DD240KB series includes variants with different blocking voltages. Confirm mounting torque specifications (2.5-3.9 N·m) and isolation voltage requirements (2500 V AC RMS) during integration. Ensure thermal management aligns with the specified junction-to-case thermal resistance and operating temperature limits.

Selection Notes

Select this component when a single-phase or three-phase bridge configuration requires an isolated base for thermal management. The 800 V rating suits applications with moderate input voltages. Consider the 240 A continuous current capacity and 5000 A surge capability for load profiles. Verify that the physical dimensions and screw mounting pattern match the mechanical design constraints.

Part Context

This module belongs to the SanRex DD240KB series, which offers a range of voltage ratings including 400 V, 800 V, 1200 V, and 1600 V. All variants share the same physical footprint and electrical characteristics regarding current handling and thermal performance, differing primarily in their reverse voltage blocking capabilities. The series is engineered for general-purpose industrial rectification.

Replacement Considerations

Direct replacements must match the 800 V reverse voltage, 240 A current rating, and identical mounting dimensions. Verify that substitute components offer comparable surge current ratings and thermal resistance values to ensure system reliability without redesigning the cooling infrastructure.