Square D Type S NEMA Size 4 Co...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$518.60
Square D Type S NEMA Size 4 Contactor Replacement Coil, 110/120VAC 50/60Hz

Square D Type S NEMA Size 4 Contactor Replacement Coil, 110/120VAC 50/60Hz

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Model: 3109140038

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

$518.60
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Square D Type S NEMA Size 4 Contactor Replacement Coil, 110/120VAC 50/60Hz

The Square D Type S replacement coil lets you quickly restore or reconfigure a Type S contactor or starter without buying a whole new unit. Dual-rated at 120V AC 60Hz / 110V AC 50Hz, this coil swaps directly into compatible Class 8903 Type SV lighting contactors, Class 8502 Type SF contactors, and Class 8910 Type SYD230 contactors, and is sized for NEMA Size 4 starters. Manufactured by Schneider Electric, it's a cost-effective way to change control circuit voltage or service an existing contactor in industrial and commercial installations.

Key Features

  • Dual Voltage Rating: 120V AC 60Hz / 110V AC 50Hz coil allows the same contactor or starter to be adapted to different control circuit voltages.
  • Direct Compatibility: Fits Class 8903 Type SV lighting contactors, Class 8502 Type SF contactors, and Class 8910 Type SYD230 contactors.
  • NEMA Size 4: Designed for use in NEMA Size 4 starters and contactors.
  • Inrush Power: Rated 1260 VA / 1185 VA inrush for dependable coil pull-in performance.
  • Average Consumption: 85 VA / 89 VA sealed holding load for efficient continuous operation.
  • Field-Replaceable Design: The coil can be swapped out in the field, saving the cost of replacing the entire contactor or starter.
  • Country of Origin: Manufactured in Mexico.

Technical Specifications

  • Warranty: 18 months
  • NEMA Size: 4
  • Voltage Rating: 110/120VAC 50/60Hz
  • Inrush Power: 1260 VA / 1185 VA
  • Average Consumption: 85 VA / 89 VA
  • Country of Origin: Mexico

Typical Applications

  • NEMA Motor Starter and Contactor Servicing
  • Industrial Control Panels
  • Commercial Lighting Contactor Circuits
  • Control Circuit Voltage Conversions
  • Panel Builder and OEM Assemblies

Why Square D?

Square D by Schneider Electric backs this replacement coil with an 18-month warranty and a consistent, field-serviceable design that keeps industrial and commercial control equipment running without a full contactor replacement. It's a straightforward way for contractors, panel builders, and OEMs to match control circuit voltage requirements on Class 8903, 8502, and 8910 contactors while relying on Square D's established manufacturing quality.

Manufacturer Resources

Product Specs

Product Type:
Contactor Coil
Voltage Rating:
110/120VAC
Configuration:
NEMA Size 4
Department:
Electrical
Product Group:
Motor Control & Automation
Product Subgroup:
Contactors & Relays
Product Depth:
2.47 in
Product Width:
2.56 in
Product Height:
2.87 in

Square D 3109140038 – Frequently Asked Questions

1) Which Square D contactors does the Type S 110/120VAC replacement coil fit?
The Square D Type S coil, part 3109140038, drops into Class 8903 Type SV lighting contactors, Class 8502 Type SF contactors, and Class 8910 Type SYD230 contactors. It is sized for NEMA Size 4 starters and contactors, so it will not serve a smaller or larger frame size. If your nameplate shows one of those three classes at Size 4, this is the matching coil.
2) Can I use this coil on both 120V 60Hz and 110V 50Hz control circuits?
Yes. The coil is dual-rated 120V AC 60Hz / 110V AC 50Hz, so the same part covers North American 60Hz control circuits and 110V 50Hz circuits. That dual rating is also what makes it a common choice for converting an existing Type S contactor's control voltage rather than replacing the unit.
3) What inrush and sealed VA do I need to size my control transformer for this Square D coil?
Size the control transformer for 1260 VA / 1185 VA inrush at pull-in, and 85 VA / 89 VA sealed holding load once the contactor is latched in. On a Size 4 coil the inrush is what governs transformer selection, especially if several coils can pull in at the same time on one control circuit.
4) Is there a 120V replacement coil equivalent to the Square D 3109140038 for an Eaton Freedom series contactor?
Not interchangeably, but there is a matching voltage option. The Square D Type S coil, part 3109140038, is rated 110/120VAC and is built for Square D Type S contactors - Class 8903 Type SV lighting contactors, Class 8502 Type SF, and Class 8910 Type SYD230 at NEMA Size 4. For Eaton Freedom series contactors, the corresponding renewal coil is the Eaton 9-2876, rated 120/110V at 60/50 Hz. Coils are specific to the magnet assembly and frame they mount in, so the coil must match the contactor family on the door, not just the control voltage.
5) My starter is a larger frame than NEMA Size 4 - what coil should I look at instead?
The Square D 3109140038 coil is sized for NEMA Size 4 Type S contactors and starters, so it will not serve a larger frame. For a Size 5 frame, the Eaton 2050A14G09 is a Type GCA 530 Size 5 replacement coil rated 200V/208V 60Hz - note the control voltage there is 200/208V rather than 120V, so confirm the control circuit before ordering. Coils are frame-size specific, so match the starter size stamped on the magnet assembly.
6) Can the coil be changed in the field, or do I have to replace the whole contactor?
It is a field-replaceable coil. The magnet coil comes out of a Class 8903, 8502, or 8910 Type S unit and the new one goes in, so you keep the existing contacts, base, and panel wiring. That is the normal repair path for a burned-out coil or a control voltage change on an installed Size 4 starter.
7) I need a 120V replacement coil for a lighting contactor that isn't Square D. What are my options?
For a non-Square D lighting contactor, match the coil to that brand's frame. ZenSupply carries the ABB CR460XC Series Lighting Contactor Replacement Coil for CR460XC lighting contactors. The Square D 3109140038 is only correct on Square D Class 8903 Type SV lighting contactors at NEMA Size 4.
8) I need a coil for a small Size 1 starter, not a Size 4 - is the Square D Type S coil the right part?
No. The Square D Type S coil, part 3109140038, is built for NEMA Size 4 Type S contactors and starters. For the small end of the range, the ABB 15D2 series replacement magnet coil covers NEMA Size 00, 0 and 1 magnet assemblies. Pick the coil by the starter frame size first, then confirm the control voltage matches your circuit.
9) What are the physical dimensions of the Square D Size 4 Type S coil?
The coil measures 2.87 in height, 2.56 in width, and 2.47 in depth. Useful if you are confirming you pulled the right Size 4 coil out of the magnet assembly before ordering, since Type S coils across frame sizes look similar but differ in body size.
10) Who manufactures the Square D Type S coil and where is it made?
Square D is a Schneider Electric brand, and this coil is manufactured in Mexico. For procurement paperwork and panel build documentation, the part number to reference is 3109140038.
How fast can I get the Square D 3109140038 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 3109140038 come with a warranty?
Absolutely. The Square D 3109140038 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 3109140038?
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
Why buy the Square D 3109140038 from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
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