EKF presents the SRU-UPS, a short time power backup solution housed on a 100x160mm2 Eurocard, suitable e.g. for CompactPCI® Serial backplanes. or other 19-inch based systems. Used in addition (in-line) to a PSU, it can be regarded as uninterruptible power supply (UPS). Under normal conditions the SRU-UPS bypasses the 12V power rail and charges the on-board Supercapacitors. When a power fail situation occurs, the SRU-UPS sustains regulated 12V/5A on its output for at least 14s, sufficient for a controlled shutdown without loss of data.
Source material: www.ekf.com/s/sru/sru.html