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Hybrid over-voltage protectors
30 April 2019, Circuit & System Protection
The brand new GMOV line of over-voltage protection components from Bourns combines the company’s patented, space-saving FLAT gas discharge tube (GDT) technology with a metal oxide varistor (MOV) to create a compact and enhanced over-voltage protector that is a drop-in replacement for standard 14 and 20 mm MOVs.
Bourns designed GMOV to be an enhanced protection solution that helps overcome degradation and catastrophic failure issues that can occur in discrete MOVs that are subjected to transient surges or temporary over-voltage exceeding their maximum rated values. The GDT is used to isolate the MOV from the line voltage so it remains ‘on call but not on duty,’ thereby shielding it from transients and temporary over-voltage spikes that typically damage the MOV over time.
Another benefit of combining the two technologies is that the GMOV device offers ultra-low leakage (less than 0,1 μA), helping to reduce damage due to Watt loss heating. The result is a high-reliability protection solution with virtually zero standby energy consumption.
GMOV products are currently offered in 14 and 20 mm versions with RMS ratings ranging from 45 V to 320 V. The 14 mm version has a maximum surge current rating of 6 kA on an 8/20 μs current waveform, while the 20 mm version tops out at a robust 10 kA. |
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