Best Home Surge Protectors 2021

NEC Article 230.67 definition of dwelling unit includes your home.

Per the National Electric Code (NEC 2020), your home is considered a dwelling unit. Other dwelling units include Hotels, Hospitals, Dormotories, Barracks and Apartment Buildings. The NFPA 70 Article 230.67 states that all dwellings units must install a UL1449 Listed SPD at the incoming service panel. In the case of most residences, this is a 120/240Vac main service. Shown below is an example using the M50-120T-A.

The M50-120T-A is installed via a 2-Pole 30A circuit breaker and will not only protect the main service panel but all smart applicances and electronics in the home like your oven, refrigerator, dishwasher, security system, televisions, ev chargers, etc... This protector is what is referred to as a "Whole House Surge Protector".

PRODUCT COMPARISON

This page collects publicly available data from ul.com and manufacturers web sites then assembles a side by side reference table for convenient product comparisons.

Manufacturer		Ditek	Rectorseal	ICM Controls	Intermatic
UL File #	E326289	E328921	E505670	E347279	E359025
Model	M50-120T-A	DTK-120/240CM+	RSH-50	ICM517	AG3000
Product Image
UL.com Ratings
SPD Type	1	1*	1	2	1
Volt (V)	240/120	240/120	240/120	240/120	240/120
AC/DC DC PV	AC	AC	AC	AC	AC
Phase	1S	1S	1S	1S	1S
Amps (A)	n/a	n/a	n/a	n/a	n/a
Ambient Min (C)	-35	-35	-40	-35	-40
Ambient Max (C)	80	80	85	40	70
Mode
	L-L L-N L-G N-G	L-L - L-G -	L-L - L-G -	L-L L-N L-G N-G	L-L - L-G -
VPR (Vpk)
L-L L-N L-G N-G	1200 700 1200 1200	1200 - 700 -	2000 - 1200 -	1200 800 900 1000	1200 - 700 -
MCOV
L-L L-N L-G N-G	280 140 140 120	300 - 150 -	300 - 150 -	260 130 130 260	300 - 150 -
In (kA)	20	10	10	5	20
SCCR (kA)	150	100	200	10	100
Additional Data Sheet Ratings
Surge Current Rating (kA)	50	50	50	100	-
Protection Circuit	Hybrid TMOV+GSG	TMOV	TMOV+GDT	MOV	TMOV
Leakage Current	No	Yes	Yes	Yes	Yes
TOV Optimized	Yes	No	No	No	No
Diagnostics	LED Audible Alarm	LED	LED	LED	LED
Environmental Rating	NEMA 4X NEMA 6 (submersible)	NEMA 4X	NEMA 4X	NEMA 3R	NEMA 4X
Warranty	10-year	3-year	Limited Lifetime	Limited Lifetime	3-year
Connected Equipment Warranty	10-year $7,500	3-year $7,500	5-year $5,000	-	3-year $7,500

10108 USA Today Way Miramar, FL 33025 USA	Contact us to develop a surge mitigation solution for your application
www.citel.us	Where to purchase Citel SPD's