Specification
usa.siemens.com/surge
Surge Protective Devices (SPDs) provide
the best protection from both externally
and internally generated surges when
located as close to the building
distribution system as possible. For cost
and space reasons many buildings only
include one SPD located at the main
incoming load center and do not cascade
SPDs throughout the building as
recommended by IEEE. The new Siemens
QSPD series of SPDs are economical and
easy to install in most panels throughout
a building so that whole facility protection
can be obtained. See the Siemens
Boltshield web page and brochures for
more information.
Product specifications
General specifications
Maximum surge current rating range kA per phase
UL Type designation SPD Type *
UL I-nominal rating kA
UL short circuit current rating kA
Repetitive impulse , hits
Response time < ns
Physical specifications
Humidity range -% non-condensing
Operating frequency -Hz
Operating temperature -ºC to +ºC
Dimensions in inches (mm) pole (.) x (.) x . (.)
pole (.) x (.) x . (.)
Weight pole . lbs ( g)
pole . lbs ( g)
Neutral/ground connection # AWG (pre-wired)
Diagnostic monitoring specifications Design specifications
Green/red visual mechanical flag failure indicators Monolithic distribution grade MOV
Flashing dual color led (green/red) status indicator Integrated optimized thermal protection
Audible alarm w/ silence switch/button Fits in footprint of Siemens QP breaker
*Type SPDs suitable for use in Type applications
Modes of protection (L-N or L-G, L-L)
Features
• UL SPD Type *
• Monolithic distribution grade MOV
• Thermally protected MOV
• kA surge current protection
per phase
• kA I-nominal ratings
• kA SCCRs
• year standard warranty
• Audible Alarm
BoltShield
™
Surge
Protective Devices
QSPD series for load centers