SES40 Service Entrance Suppression


SES40 Service Entrance Suppression

Lightning transients and surges are a major cause of expensive electronic equipment failure and business disruption. Damage to computers, data and communications may occur, as well as a loss of revenue and profits. The SES40 Service Entrance Suppression, part of the ERITECH® line of Facility Electrical Protection products from ERICO®, is designed to protect sensitive electronics at the service entrance for residential or light commercial service panels.

This economical unit is designed for 120/240 VAC power systems and provides surge protection totaling 80 kA 8/20 µs total, or 40 kA per phase. The SES40 is Listed to UL® 1449 as a Type 1 device. It offers a simple and hassle-free installation for protection on the line side or load side of the service panel, without additional external protection being required by circuit breakers or fuses.


  • Compact NEMA®-4 enclosure design can be flush mounted or installed in a small space
  • LED status indication flag for status monitoring
  • 120/240 VAC operating voltage suits the most common power distribution system for residential or small commercial buildings
  • 40 kA 8/20 µs maximum surge rating per phase
  • CE mark and UL 1449 Third Edition compliant
  • ERICO Surge Products are covered by an extended warranty; see the attached document for more information


The SES40 Service Entrance Suppression is designed to protect sensitive electronics at the service entrance from lightning transients and surges.

More Information

Model SES40120/240
Nominal System Voltage, Un 120/240 V
Distribution System 2Ph 2W+G
Max Cont. Operating Voltage, Uc 170/340 VAC
Frequency 50/60 Hz
Max Discharge Current, I(max) 40 kA 8/20 µs
Nominal Discharge Current, In 20kA 8/20µs
Protection Modes L-G
Technology MOV with thermal disconnect
Short Circuit Current Rating, Isc 200 kAIC (lsc)
Voltage Protection Level (8/20µs) 700 V @ 3 kA
1.2 kV @ 20 kA
Status LED indicator
Dimensions H x D x W: mm (in) 153 x 78 x 84 (6.02 x 3.07 x 3.31)
Weight: kg (lbs) 0.7 (1.54)
Enclosure Aluminum, IP 65 (NEMA-4)
Connection Line: 600 mm of 5.26 mm² (24” of # 10 AWG) flying leads
Neutral/Ground: 900 mm of 5.26 mm² (36” of # 10 AWG) flying leads
Mounting 3/4” straight nipple
Temperature -40°C to 80°C (-40°F to 176°F)
Humidity 0% to 90%
Approvals CE, UL 1449 3rd Edition Type 1 compliant
Surge Rated to Meet ANSI®/IEEE® C62.41-1991 Cat A, Cat B, Cat C
ANSI/IEEE C62.41.2 Scenario II, Exposure 2, 50 kA 8/20 µs
EC 61643-1 Class II
UL 1449 Ed. 3 In 20 kA mode

ANSI is a registered trademark of the American National Standards Institute. IEEE is a registered trademark of the Institute of Electrical and Electronics Engineers, Incorporated. NEMA is a registered trademark of the National Electrical Manufacturers Association. UL is a registered trademark of Underwriters Laboratories, Inc.



SES40 data sheet

SES40 Instruction Sheet

Surge 5 Year Warranty