Key Specification Ratings
Maximum Continuous Operating Voltage (MCOV) – 8/10
Why Did It Earn this Score? – This model’s differentiated MCOVs are actually dependent on the user’s chosen mode of protection. As a result, it offers two tiers of MCOV functionality: 150 volts (when the unit is set to L-N, L-G, or N-G modes) and 300 volts (when the unit is set to L-L) mode. For a surge protector of this size and price, these two levels of protection certainly exceed the standard seen throughout the rest of the surge protector market.
Voltage Protective Rating (VPR) – 8.5/10
Why Did It Earn this Score? – Much like its MCOV ratings, this model’s VPR actually changes depending on which mode of protection is engaged. L-N, L-G, and N-G modes all allow for up to 600 volts of protection, while the high-end L-L mode provides a full 900 volts of protection. By providing two different VPRs, this model goes beyond expectations and raises the bar for other units in its class.
Mode of Protection – 9/10
Why Did It Earn this Score? – Simply put, few (if any) other consumer-grade surge protectors under $200 provides all four of the major modes of protection. Though the majority of users of this unit leave it in L-N mode, those with more experience installing and managing a whole home surge protector will also be able to operate this model in L-G, N-G, or L-L modes.
The Final Verdict
At the end of the day, the Siemens FS100 is a must-have for folks who are serious about protecting their entire home against electrical surges. This model’s core specifications far exceed any comparable models, both from Siemens and from other brands, while its special features go the extra mile when it comes to preserving the safety of your home’s essential appliances. Simply put, folks who want to take the guess work out of installing a whole home surge protector for the first time are not going to beat this model’s overall quality and value.