ND431625

SCRs - Modules Overview

The Powerex ND431625 is a Dual SCR Isolated POW-R-BLOK module rated for 250 Amperes and up to 1600 Volts. It features electrically isolated heatsinking with an aluminum nitride insulator and compression bonded elements on a metal baseplate. The device provides low thermal impedance, quick connect gate terminals with keyed mating plug provisions, and UL recognition. It supports operating temperatures from -40°C to +130°C and includes isolation voltage of 2500 Vrms at 25°C.

SCRs - Modules Feature Summary

• Electrically isolated heatsinking design
• Aluminum nitride insulator construction
• Compression bonded elements
• Quick connect gate terminal with keyed mating plug provision

SCRs - Modules Applications

• Bridge circuits
• AC & DC motor drives
• Battery supplies
• Power supplies
• Large IGBT circuit front ends

SCRs - Modules Procurement Notes

Verify the complete eight-digit part number against official documentation to ensure correct voltage and current ratings. Confirm mounting torque specifications for M6 and M8 screws during installation. Check thermal resistance coefficients and junction-to-case parameters for proper heatsink selection. Ensure gate trigger requirements match control circuit capabilities.

SCRs - Modules Selection Notes

Select based on required blocking voltage and average on-state current. Consider thermal impedance characteristics for heat dissipation needs. Verify isolation voltage requirements for safety standards. Evaluate gate trigger current and voltage compatibility with drive electronics. Assess physical dimensions and mounting hole configurations for mechanical integration.

SCRs - Modules Part Context

This component belongs to the POW-R-BLOK series of dual SCR isolated modules manufactured by Powerex. These modules are designed for phase control applications requiring isolated packaging. The series offers various voltage and current combinations within the same form factor, allowing for standardized mechanical designs across different power levels.

SCRs - Modules Replacement Considerations

ND43__25 family members share identical mechanical outlines and electrical isolation characteristics. Substitution requires matching voltage rating (indicated by second digit) and current rating (indicated by third digit). Verify gate terminal pinout compatibility before replacement.

SCRs - Modules FAQ

What is the maximum repetitive peak forward and reverse blocking voltage?

Up to 1600 Volts.

What is the typical turn-off time under specified conditions?

150 microseconds typically, measured at TJ = 130°C, IT = 250A, and Re-Applied dV/dt = 20V/µs.

What is the minimum dV/dt capability with the gate open?

500 V/µs at Tj=130°C with exponential waveform to 2/3 VDRM.