Eaton S20P11S37SS4X Transformer - UL Listed 37.5 kVA
Part Number: S20P11S37SS4X
Quick Summary
The Eaton S20P11S37SS4X transformer provides general-purpose encapsulated power for indoor-outdoor electrical distribution. Engineers often confront environmental exposure, mounting challenges, and voltage swings that disrupt uptime and increase maintenance. UL Listed safety certification, combined with a NEMA 3R indoor-outdoor enclosure and optional NEMA 4X corrosion protection, helps ensure reliable operation in harsh conditions. With 37.5 kVA capacity and flexible tap options, it delivers stable power while reducing field service costs and downtime for industrial facilities and commercial facilities alike.
Product Information
Extended Description
S20P11S37SS4X Eaton: Eaton General purpose encapsulated transformer, EP, aluminum, NEMA 3R, 60 Hz, single-phase, 240 V, 480 V, 120/240 V, 1 at +5% FCAN, 2 at -5% FCBN X 2 at +2.5% FCAN, 4 at -2.5% FCBN, 115 °C rise, 37.5 KVA, indoor-outdoor
Product Name
Eaton General purpose encapsulated transformer
Catalog Number
S20P11S37SS4X
UPC
786680074929
Product Length/Depth
0.001 in
Product Height
0.001 in
Product Width
0.001 in
Product Weight
0.001 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
Catalog Notes
Grade 304 stainless steel enclosure with NEMA 4X rating
Coil material
Aluminum
Design
EP
Enclosure
NEMA 3R
Tap size
1 at +5% FCAN, 2 at -5% FCBN x 2 at +2.5% FCAN, 4 at -2.5% FCBN
Type
General-Purpose Encapsulated Transformer
Frequency rating
60 Hz
Phase
Single-phase
Primary voltage
240 V, 480 V
Secondary Voltage
120/240 V
Temperature rise
115 °C rise
Volt ampere rating
37.5 kVA
Weathershield
Indoor-Outdoor
Feature → Business Impact → Application: General-purpose encapsulated design (EP) delivers robust protection in challenging environments, reducing insulation failures and maintenance cycles while enabling safer, easier installation on factory floors and exterior spaces. Application: manufacturing plants, outdoor enclosures, and municipal facilities seeking reliable power distribution. Feature → Business Impact → Application: NEMA 3R enclosure with Weathershield for indoor-outdoor use minimizes corrosion risk and weather-related downtime, extending service intervals and lowering total cost of ownership. Application: outdoor substations, loading docks, and equipment yards. Feature → Business Impact → Application: Aluminum coil reduces weight and material cost, improving handling, mounting flexibility, and overall installation efficiency without sacrificing performance. Application: retrofit projects and new builds with tight labor schedules. Feature → Business Impact → Application: Dual voltage primary 240/480 V and secondary 120/240 V supports diverse distribution schemes, enabling a single unit to serve multiple downstream loads and simplify spare part inventories. Application: mixed-voltage facilities and multi-tenant environments. Feature → Business Impact → Application: Tap changer options (+5% FCAN, -5% FCBN, +2.5% FCAN, -2.5% FCBN) provide voltage regulation to accommodate supply fluctuations, improving equipment performance and safety. Application: critical process lines and precision equipment. Feature → Business Impact → Application: 115 °C rise rating confirms thermal performance under full load, supporting consistent output during peak demand. Application: transformer banks in hot environments or where long run times are expected. Feature → Business Impact → Application: UL Listed certification and Catalog Notes reinforce compliance and long-term reliability, reducing risk during audits and procurement reviews. Application: regulated industries and OEM integrations.
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FAQs
Plan for a level, vibration-free mounting surface with adequate clearance for access to the enclosure. The unit’s NEMA 3R indoor-outdoor design and optional NEMA 4X protection mitigate weather exposure, but ensure proper protective grounding and adherence to local codes. Use the 1, 2, or 4-tap configurations to align with site voltage and minimize insulation stress during startups.
Primary voltage is 240 V or 480 V, with a secondary of 120/240 V. Tap sizes are 1 at +5% FCAN, 2 at -5% FCBN × 2 at +2.5% FCAN, and 4 at -2.5% FCBN, enabling precise voltage regulation to compensate supply fluctuations. This reduces downstream equipment wear and improves Uptime and performance in variable-grid environments.
Yes, the S20P11S37SS4X is UL Listed, meeting essential safety standards for electrical equipment. It features a NEMA 3R enclosure suitable for indoor-outdoor installation and is backed by Eaton’s documented warranty. Catalog notes mention a Grade 304 stainless steel enclosure with NEMA 4X protection in certain configurations, providing enhanced corrosion resistance.
Eaton backs the transformer with a standard warranty policy of one year from the date of installation or eighteen months from shipment, whichever occurs first. Routine maintenance is minimal but should include periodic enclosure inspections for cleanliness, terminal integrity, and tap position verification. Follow Eaton’s recommended practices to sustain performance and safety over the life of the unit.
The 37.5 kVA, single-phase S20P11S37SS4X is ideal for industrial power distribution, outdoor substation setups, and facilities requiring mixed voltage support. It accommodates 240/480 V primary with 120/240 V secondary, and its rugged enclosure makes it suitable for manufacturing, data centers, HVAC systems, and outdoor equipment rooms seeking reliable, regulated power with reduced maintenance.