Customer Reviews

Tripp Lite PDUMH20ATNET Power Distribution Unit Metered PDU 1U 16 Outlets 20 Amp Web Card Auto Transfer Switching

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This device has an amazing feature set: lots of outlets, automated transfer switch, and switchable outlets at a very low price.

I deployed 4 of those devices at a high-end data center in May of 2008. Now, 2.5 years later, three of them have complete loss of power on their primary feed, and have failed over to the secondary feed. One of the units was only connected to a primary feed, so when the primary feed input failed, the power to all connected devices went down.

I opened the failed devices to examine, and found that diode D55 on the primary input circuit is burned out. The circuit board underneath the secondary feed's diode D50 looks black as well, indicating that it would probably burn out next, at which point both input feeds are lost, and with it power to all outlets. To anybody who owns one of these units: examine the circuit board around D50 and D55 for burn marks.

In summary, within 2.5 years, 3 out of the 4 devices had a failure on the input feed circuit. The device looks like a bargain, but appears to have some design flaws. Use only for home, not for a data center!!!

I am also having the same problem with the D50 and D55 diodes on the Tripp lite PDUMH20AT power board. I lost both of them on one PDU and one each in two other after less than three years in operation. The unit that lost both diodes was the main PDU for our server rack and it dumped all three servers that it was feeding. This is not a good referral for anyone wanting to use the Tripp Lite product.