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Internet #204300729

Model #SDSA3650

40 kA 3-Phase Panel Mounted Surge Protective Device

  • 40 kA surge current capacity per phase
  • 2 Year Warranty
  • NEMA 4X for indoor/outdoor installation
  • See More Details

Frequently Bought Together


Product Overview

The Square D by Schneider Electric Hardwired Type 1 Surge Protective Device is suitable for both indoor and outdoor applications. This SPD is intended for use with pumps, motor applications and service-entrance locations. The unit is designed for hardwired usage and features an LED to indicate its operational status.
  • Use for pumps, motor applications and service-entrance locations
  • 1304 joules
  • 40,000 Amp maximum surge current rating
  • 200,000 Amp SCCR
  • NEMA 4 rated enclosure
  • LED indicates operational status
  • Provides equal protection to all circuits and receptacles
  • For indoor or outdoor use
  • Meets NEC requirements
  • ANSI certified and CSA and UL 1449 3rd edition listed
  • Click here for more information on Electronic Recycling Programs
  • California residents

Info & Guides

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Product Depth (in.)
Product Height (in.)
Product Width (in.)


Connection type
Panel Mount
Electrical Product Type
Whole House Surge Protectors
Maximum Amperage (amps)
Product Weight (lb.)

Warranty / Certifications

Certifications and Listings
ANSI Certified,UL Listed
Manufacturer Warranty
Square D warrants equipment manufactured by it and sold through authorized sales channels to be free from defects in materials and workmanship for two (2) years from date of invoice by Square D or its authorized retail channel.

Questions & Answers


Will this protect a 480Y/277V or 208Y/120V service? The old ones listed multiple voltages. The ne...

Asked by Safesmartpower November 20, 2020

Hello, No. These SPDs are voltage specific. They can only be used on voltages systems they are labeled with. SDSA3650 is good at protecting 600Y/347. SDSA2040 should be used for 208Y/120V and SDSA4040 should be used for 480Y/277V. Warm regards, Schneider Electric Customer Care

Is this designed for commercial application 3 phase, 200 amp 120/208 volt electrical panel

Asked by Beachbum July 18, 2019

Dear Beachbum; Yes, SDSA3650 will work on a 208/120 3P4W Commercial application.

where can I find the installation instructions for these?

Asked by RichAllegheny August 25, 2017

The Document can be downloaded from Internet it is 8291-0068A Regards, Customer Care

Amper breaker for this device

Asked by Shark May 31, 2017

Hello Shark, The breaker size that can be used for an SDSA3650 is a 15-30 ampere, 3-pole breaker. Regards, Customer Care Center

Can you tell me the main difference between the Square D SDSA3650 and the SDSA3650D?

Asked by Contractor February 25, 2017

Good Day! The SDSA3650 is for a 600Y/347 V, 3-phase, 4-wire system ( Do not use on ungrounded systems. Systems must be solidly grounded.) The SDSA3650D is for a 600 V Delta, 3-phase, 3-wire system. Best Regards, Schneider Electric Customer Care Center

Out of curiosity, where are Square D surge protectors manufactured?

Asked by TechGuru January 10, 2017

Good question. Our surge protective devices, depending on particular catalog numbers, are manufactured here in the US or in Mexico. Regards, Schneider Electric Customer Care

Hi, can I use this in a country with 3 phase 240/415v? Is there a way to set the maximum voltage?

Asked by Random1 December 13, 2016

I'm afraid not, we recommend you use the SSP04 series, they are rated for 220/380 - 230/400 - 240/415 & 277/480Y . For additional assistance please contact Schneider Electric at 888-778-2733, option 1-6.

How many amps can I run through it?

Asked by hectorprada73 October 23, 2015

If you connect 2 HEPD80s to the 3 phase 120/208Y service, one on A & B and the other on B & C then the entire 3 phase panel will be protected. The surge protects are non load bearing to the amprage of the loads does not matter. For additional assisatnce please contact Scghneider Electric TVSS  Group at 800-577-7353. We look forward to hear from you.

does this fit my load center

Asked by Bronxguy September 12, 2015

Hi Bronxguy, I contacted the Square D company who states that if your system is less than 480/277 you should not use this product. There is a new product out model number SDSA2040 that is good for 120/208. Square D stated this is good on any of there panels with that spec.

would this also protect my whole home generator during an emp event?

Asked by sandy May 27, 2015

SDSA3650 is a commercial, not a residential product and has no residential connected warranty. We would not recommend using this on any voltages less than 480Y/277V; though it is designed to fit all voltages, it is best suited for 277V to 600V applications. If three phase is in the home, consider installing two single phase HEPD80 units and connect to legs A and B on the first one and legs B and C on the second one. This will give the connected equipment warranty and also 80kA per phase protection instead of 40kA from the SDSA3650.

40 kA 3-Phase Panel Mounted Surge Protective Device - page 2

Customer Reviews

  • 4.5
    out of 4 reviews
  • 67% recommend this product
Filter by:
Showing 1-4 of 4 reviews
I checked with a Master Electrician prior to installing this item to make sure that it would be ...
I checked with a Master Electrician prior to installing this item to make sure that it would be installed correctly to give maximum protection to the variable frequency drive that we were protecting. The installation was very straight forward.
by PumpGuy
The part is okay for 600V Three Phase, but the listing show that it is also for a 240 Vt three ph...
The part is okay for 600V Three Phase, but the listing show that it is also for a 240 Vt three phase. the problem is we want the cutoff just over 280 vts which is under the 600 volts. If you have a factory with a 600 volt panel, this is the surge suppressor for you! If not don't buy it. Note to Home Depot: correct your listing!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
by HydroTec
Response from SchneiderCustomerCareJan 14, 2018
Dear HydroTec,
Thank you for the feedback regarding the product specifications listed on the Home Depot website for the above referenced Surge Protection Device. As a result of your feedback we have taken action to get the voltage specifications clarified on the Home Depot website.

Schneider Electric Customer Care Center SquareD
Awesome Surge Protector
This Surge protectors are great. We've installed on in each of our breaker panels.
by slfox
Showing 1-4 of 4 reviews