Solid State Electronics

Bhandup West, Mumbai, Maharashtra

This noise level can be reduced by up to 10dB when the input rectifier bridges areconfigured with Fast Recovery Diodes (Trr = 100 nsec to 200 nsec) as they enablefaster turn off resulting in lower peak recovery currents compared to standardrecovery normal rectifier diodes.This noise level can be further reduced by approximately another 5dB when usingrectifier bridges with Ultra Fast Recovery Diodes (Trr = 35 nsec) and still furtherwhen configured with Silicon Carbide Schottky Rectifier Diodes (Trr < 10 nsec).

Power Semiconductors are quite often used in inverter applications with DC-Link.High switching frequencies generate harmonics and line distortion. It is importantthat electronic circuits in equipments reduce these influences to meet EMI filteringrequirements according to EMIEMC VDE and other international standards.This noise level can be reduced by up to 10dB when the input rectifier bridges areconfigured with Fast Recovery Diodes (Trr = 100 nsec to 200 nsec) as they enablefaster turn off resulting in lower peak recovery currents compared to standardrecovery normal rectifier diodes. This noise level can be further reduced by approximately another 5dB when usingrectifier bridges with Ultra Fast Recovery Diodes (Trr = 35 nsec) and still furtherwhen configured with Silicon Carbide Schottky Rectifier Diodes (Trr < 10 nsec).

These Fast, Ultra Fast Recovery Diodes and Silicon Carbide Schottky RectiferDiodes result in much lower cost electronic circuits and equipment as the size of theEMI filter networks with its bulky capacitors and inductors is substantiallyreduced.The trend today is to replace normal rectifier bridges with Fast, Ultra Fast andSilicon Carbide Schottky Rectifier Bridges to make more compact and lower costequipment. These are now available for both Single and Three Phase AC use.The metal housing of Modular Rectifier Bridges is preferred over plastic housingbridges as the cost of heatsink is further reduced or eliminated. Our 25 Amp and35 Amp Bridges offer up to 5.0 Amp and 8.0 Amp respectively in free air at ambienttemperatures up to 45 C