Square D Surgelogic SDSA Serie...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$389.70
Square D Surgelogic SDSA Series Surge Protective Device, 40kA, 3-Phase

Square D Surgelogic SDSA Series Surge Protective Device, 40kA, 3-Phase

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Model: SDSA3650

In Stock (leaves warehouse same day if ordered before 3pm ET)

$389.70
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Square D Surgelogic SDSA Series Surge Protective Device, 40kA, 3-Phase

The Square D™ Surgelogic™ SDSA Series is a 3-phase surge protective device (SPD) rated 40 kA per phase, built for indoor or outdoor installation and surge suppression on three-phase grounded electrical services from 208Y/120 VAC up to 600 VAC line-to-line. Representative models such as the SDSA3650 operate at 600Y/347 V AC with a Uc maximum continuous operating voltage of 510 V, and are housed in a Black Plastic, NEMA 4X-rated enclosure with a local LED status signal. The 3-phase, 4-wire configuration and touch-safe terminals make this series suitable for commercial and industrial electrical services requiring UL 1449 Type I protection.

Key Features

  • Surge Current: 40 kA per phase for robust initial surge reduction on 3-phase services.
  • Rated Operational Voltage (Ue): 600Y/347 V AC with a Uc maximum continuous operating voltage of 510 V.
  • Wiring Configuration: 3-phase, 4-wire design for grounded electrical service protection.
  • Durable Construction: Black Plastic enclosure rated NEMA 4X for indoor or outdoor use.
  • Local Signalling: Status LED illuminates green during normal operation for at-a-glance monitoring.
  • Nominal Discharge Current: 10 kA rating supports repeated surge event handling.
  • Short Circuit Protection: 200 kA short circuit current rating for added system resilience.
  • Cable Length: 24 in leads for straightforward field termination.

Certifications & Compliance

  • NEC 285: Type I
  • UL 1449 ed. 4: Type I
  • CSA C22.2 No 8
  • NEMA 4X Rated Enclosure

Technical Specifications

  • Configuration: 3-Phase 4-Wire

Typical Applications

  • Commercial and Industrial Electrical Service Protection
  • Indoor or Outdoor Panelboard and Switchgear Surge Suppression
  • Three-Phase Grounded Electrical Services from 208Y/120 VAC up to 600 VAC Line-to-Line
  • Cascaded SPD Systems
  • Wet and Outdoor Location Installations (NEMA 4X)

Why Square D?

Square D's Surgelogic SDSA Series combines UL 1449 Type I certified designs with a rugged NEMA 4X Black Plastic enclosure, touch-safe terminals, and a local status LED for dependable, code-compliant surge protection on demanding commercial and industrial services. Backed by an 18-month warranty and manufactured to mercury-free, sustainable packaging standards, this series is built for reliable long-term performance in cascaded SPD systems.

Manufacturer Resources

Product Specs

Configuration:
3-Phase 4-Wire
Product Type:
Surge Protective Device
Product Material:
Black Plastic
Voltage Rating:
600Y/347VAC
Listing:
UL 1449 Type I
Standards:
CSA C22.2 No 8
Department:
Electrical
Product Group:
Wiring Devices
Product Subgroup:
Panelboards & Load Centers

Square D SDSA3650 – Frequently Asked Questions

1) Which Square D SDSA model do I order for a 480Y/277V three-phase service?
For 480Y/277V AC, the SDSA4040 is the model. The SDSA Series covers three system voltages: SDSA2040 for 208Y/120V AC, SDSA4040 for 480Y/277V AC, and SDSA3650 for 600Y/347V AC. All are 3-phase, 4-wire devices for grounded services, so you need the neutral available at the point of connection.
2) Can the Square D Surgelogic SDSA surge protector be mounted outdoors on a exterior panelboard?
Yes. The SDSA Series ships in a black plastic enclosure rated NEMA 4X, which covers wet and outdoor locations as well as indoor panelboard and switchgear mounting. The enclosure material is plastic rather than metal, so it also handles washdown and corrosive environments better than painted steel.
3) Is the Square D SDSA a Type 1 SPD I can install on the line side of the main breaker?
The SDSA Series is listed UL 1449 ed. 4 Type I and NEC 285 Type I, which is the classification permitted for connection on the line side of the service disconnect without a dedicated overcurrent device. It also carries CSA C22.2 No. 8 for Canadian work.
4) Is a Square D SDSA the right choice for a single-phase residential panel?
No. The SDSA Series is a three-phase, 4-wire device for commercial and industrial grounded services from 208Y/120 up to 600 VAC line-to-line. For a single-phase load center, a two-pole device such as the Eaton BRNSURGE10 for BR Series panels is the correct type instead.
5) Is the Eaton BRNSURGE10 a substitute for a Square D SDSA surge protective device on a three-phase service?
No. The Eaton BRNSURGE10 is a two-pole, 10 kA surge protective device in Eaton's BR Series, so it is built around a single-phase two-pole breaker position. The Square D Surgelogic SDSA Series is a 3-phase, 4-wire device rated 40 kA per phase for grounded three-phase services from 208Y/120 VAC up to 600 VAC line-to-line, with models such as the SDSA2040 at 208Y/120V AC, SDSA4040 at 480Y/277V AC, and SDSA3650 at 600Y/347V AC. If the panel being protected is three-phase, the two-pole BR device does not cover the phase count.
6) What surge rating and short circuit current rating does the Surgelogic SDSA carry?
40 kA per phase surge current, with a 10 kA nominal discharge current (In) rating for repeated surge events and a 200 kA short circuit current rating. The 200 kA SCCR means it can be applied on services with high available fault current without exceeding the device rating.
7) How is the SDSA surge suppressor wired in, and how long are the leads?
It comes with 24 inch pigtail leads for field termination, landed on a 3-phase 4-wire grounded system. Keep those leads as short and straight as the install allows; excess lead length adds let-through voltage on any SPD. Terminals are touch-safe.
8) How do I know if the surge protector is still working after a storm?
Each SDSA unit has a local status LED that shows green during normal operation. If the LED is not lit green on a walkthrough, the suppression has degraded and the unit needs replacing. There is no remote contact described for this series, so it is a visual check at the device.
9) What does the Uc 510 V rating on the SDSA3650 mean for a 600V service?
On the 600Y/347V model, the maximum continuous operating voltage (Uc) is 510 V, well above the 347 V line-to-neutral of that system. That headroom is what keeps the MOVs from conducting on normal line voltage swings. Do not apply the 600V unit on a lower-voltage system just because it fits; match the model to the service voltage or the device will not clamp at the right level.
10) Can I use the SDSA at the service entrance and another SPD downstream?
Yes, that is the intended use. The SDSA Series is built for cascaded SPD systems: a Type 1 unit at the service takes the large initial surge at 40 kA per phase, and downstream devices at panelboards handle what gets through. Downstream units on single-phase branch panels are a different product class, for example a panel-mount two-pole device like the Eaton BRNSURGE10.
11) For a single-phase load center that only needs basic surge protection, what is an alternative to the Square D SDSA series?
The Eaton BRNSURGE10 is a two-pole 10 kA surge protective device for BR Series load centers, which suits a single-phase panel served by a two-pole breaker space. The Square D Surgelogic SDSA Series is the three-phase option, rated 40 kA per phase with a 10 kA nominal discharge current and a 200 kA short circuit current rating, housed in a NEMA 4X black plastic enclosure with 24 in leads for indoor or outdoor mounting. Choose by panel type: BR load center and single-phase points to the Eaton unit, three-phase service points to the SDSA.
How fast can I get the Square D SDSA3650 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Square D SDSA3650 come with a warranty?
Absolutely. The Square D SDSA3650 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Square D SDSA3650?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
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