The QMB SPD unit is a high-performance modular surge protective device based on the IMA SPD platform. These units are available factory assembled or individually for retrofit applications. They plug easily onto the bus stack of a QMB Panelboards or Switchboards.
  • Versatility. QMB plug-on units with Surgelogic SPD can be installed in QMB panelboards and switchboards. Peak surge current ratings per phase range from 120kA to 240kA.
  • Compact Design. The Integrated QMB SPD unit requires only 9“ of full width mounting space. Much less space than an externally mounted SPD device.
  • 200 kA. QMB plug-on units with Surgelogic SPD meet the new 2002 NEC, and 2003 UL 1449 Short Circuit Current Rating requirements.
  • Retrofit Ready. The QMB plug-on SPD units are suitable for retrofit in all existing QMB panelboards and switchboards. This equates to over 30 years of installed base having retrofit potential.
  • Labor and Money Savings. Easily installs in less than one minute and reduces the amount of cable and conduit required compared to wall mounted SPD units. Plus all phase connections are pre-wired at the factory.
  • Application Flexibility. The QMB plug-on SPDunit is suitable for service entrance and non-service entrance application.
  • Competitively Priced. The QMB plug-on SPDunit has been price positioned at market levels that are competitive with comparable units. Lower Installed Cost. The total installed cost of a QMB plug-on SPD unit is approximately $400 less than a comparable externally mounted SPDthat has been installed and wired by the electrical contractor.
  • Lower Installed Cost. The total installed cost of a QMB plug-on SPD unit is less than a comparable externally mounted SPD that has been installed and wired by the electrical contractor.
QMB Branch Units
Service Voltage Peak Surge Current Rating (kA) Cat. No.
120/240 1Ø3W +G 120 QMB1IMA12
160 QMB1IMA16
240 QMB1IMA24
120/208 3Ø4W Wye +G 120 QMB2IMA12
160 QMB2IMA16
240 QMB2IMA24
120/240 3Ø4W High Leg Delta 120 QMB3IMA12
160 QMB3IMA16
240 QMB3IMA24
277/480 3Ø4W Wye +G 120 QMB4IMA12
160 QMB4IMA16
240 QMB4IMA24
347/600 3Ø4W Wye+G 120 QMB8IMA12
160 QMB8IMA16
240 QMB8IMA24