Eaton S20N18S07 Transformer - UL Listed
Part Number: S20N18S07
Quick Summary
Eaton S20N18S07 is a general-purpose encapsulated transformer used in industrial control panels and equipment racks. This model helps engineers avoid undersized gear and inconsistent voltages that stall production. UL Listed certification plus a rugged NEMA 3R enclosure supports indoor-outdoor service across demanding environments. With 7.5 kVA capacity and dual voltage options, it simplifies installation and reduces spare-part needs, delivering business value. Ideal for power distribution in machines and panels requiring reliable 60 Hz service, 240/480 V primary and 208/416 V secondary. The aluminum coil construction supports efficient heat dissipation and helps meet factory warranty terms. Designed for contractor-friendly installation, its compact footprint and 3AA wiring connection streamline panel layouts and reduce field commissioning time.
Product Information
Extended Description
S20N18S07 Eaton: Eaton General purpose encapsulated transformer, EP, aluminum, NEMA 3R, 178, 60 Hz, single-phase, 240 V, 480 V, 208/416 V, NONE, 115 °C rise, 7.5 KVA, indoor-outdoor, 3AA
Product Name
Eaton General purpose encapsulated transformer
Catalog Number
S20N18S07
UPC
786680094163
Product Length/Depth
9.89 in
Product Height
16 in
Product Width
10.38 in
Product Weight
125 lb
Warranty
Eaton Selling Policy 25-000, one (1) year from the date of installation of the Product or eighteen (18) months from the date of shipment of the Product, whichever occurs first.
Certifications
UL Listed
Coil material
Aluminum
Design
EP
Enclosure
NEMA 3R
Frame
178
Tap size
None
Type
General-Purpose Encapsulated Transformer
Wiring connection
3AA
Frequency rating
60 Hz
Phase
Single-phase
Primary voltage
240 V, 480 V
Secondary Voltage
208/416 V
Temperature rise
115 °C rise
Volt ampere rating
7.5 kVA
Weathershield
Indoor-Outdoor
Feature: General-purpose encapsulated transformer with aluminum windings. Impact: Aluminum windings plus encapsulation reduce weight and improve heat dissipation, boosting efficiency and longevity in demanding environments. Application: Suitable for control panels and machine enclosures where reliability and compact footprint matter. Feature: NEMA 3R enclosure for indoor-outdoor use. Impact: Weather resistance and protection against dust, rain, and incidental impact reduce field rework and enclosure costs. Application: Install in outdoor panels, washdown areas, or unconditioned spaces. Feature: 240/480 V primary; 208/416 V secondary; 60 Hz; 7.5 kVA rating. Impact: Broad compatibility with common industrial power networks reduces need for multiple variants. Application: Integrates with standard distribution systems and panel boards. Feature: Dimensions and mass — 9.89 in L, 16 in H, 10.38 in W; 125 lb; 3AA wiring. Impact: Compact footprint and robust construction enable easier installation and vibration resistance. Application: Mount in tight spaces and multi-panel assemblies with straightforward wiring. Feature: Certifications and warranty — UL Listed; one-year warranty (or 18 months from shipment). Impact: Compliance and warranty support reduce procurement risk and ensure service continuity. Application: Preferred for regulated environments and long-term maintenance planning.
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FAQs
For panel installations, ensure adequate clearance for the 9.89 in length, 10.38 in width, and 16 in height footprint. Use the 3AA wiring configuration for straightforward termination and mount within a NEMA 3R enclosure to protect against dust, moisture, and incidental impact. Verify that the panel can accommodate a 125 lb device and provide proper ambient ventilation to sustain the 115 °C rise rating.
The transformer supports 240 V or 480 V primary input and provides a 208/416 V secondary output at 60 Hz in a single-phase configuration. Rated at 7.5 kVA, it is designed for standard industrial power distribution without the need for tap changers, simplifying wiring and reducing configuration errors.
Yes. The unit comes with a NEMA 3R enclosure and Weathershield designation for indoor-outdoor service. This protects against rain, dust, and other environmental factors, enabling reliable operation in exterior panels, unconditioned spaces, and exposed industrial environments.
The S20N18S07 is UL Listed, signaling compliance with recognized safety standards. The NEMA 3R enclosure further supports outdoor durability. In procurement and commissioning, these certifications help meet regulatory requirements and reduce risk for regulated industrial equipment deployments, maintenance contracts, and safety audits.
With a 7.5 kVA rated capacity and rugged enclosure, the S20N18S07 minimizes spare-part inventory and unplanned downtime. Its aluminum windings and robust enclosure reduce cooling and enclosure-related faults, delivering lower lifecycle maintenance costs and improved system uptime for control panels and machine distributions.