Eaton S20P11S05 General-Purpose Transformer - UL Listed
Part Number: S20P11S05
Quick Summary
Eaton S20P11S05 is a general-purpose encapsulated transformer for indoor-outdoor power distribution. Facilities teams face challenges with rugged enclosures, voltage variability, and space constraints in control panels. UL Listed safety certification and a NEMA 3R enclosure deliver reliable, weather-resistant performance in harsh environments. This unit supports 240/480 V primary and 120/240 V secondary at 60 Hz, 5 kVA rating, and has adjustable taps to accommodate site voltage needs with minimal field wiring. By combining robust construction with straightforward installation, it reduces downtime and simplifies maintenance for industrial automation and distribution panels.
Product Information
Extended Description
S20P11S05 Eaton: Eaton General purpose encapsulated transformer, EP, aluminum, NEMA 3R, 177, 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, 5 KVA, indoor-outdoor, 121A
Product Name
Eaton General purpose encapsulated transformer
Catalog Number
S20P11S05
UPC
786680046759
Product Length/Depth
9.89 in
Product Height
16 in
Product Width
10.38 in
Product Weight
118 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
177
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
Wiring connection
121A
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
5 kVA
Weathershield
Indoor-Outdoor
General construction and design features translate into tangible business outcomes. The aluminum coil and EP design reduce weight without sacrificing conductivity, improving installation and service access, which lowers labor costs and supports safer handling. In machine panels and switchgear, the lighter frame simplifies mounting and service during upgrades. Rugged NEMA 3R enclosure offers reliable protection for indoor-outdoor installations, expanding siting options from outdoor equipment enclosures to indoor electrical rooms, and enabling flexible panel design. This single-phase 5 kVA transformer handles 60 Hz operation with primary 240/480 V and secondary 120/240 V, supporting common control circuits while minimizing energy loss and heat. Tap selection provides precise voltage adjustment to compensate for line drop and load changes. The tap configuration 1 at +5% FCAN, 2 at -5% FCBN x 2 at +2.5% FCAN, and 4 at -2.5% FCBN lets you trim output without external regulators. Its compact dimensions—9.89 in length, 16 in height, 10.38 in width—coupled with a 118 lb weight, simplify installation in restricted spaces and support safer, more accessible maintenance.
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FAQs
The S20P11S05 supports single-phase 60 Hz operation with a 240/480 V primary and a 120/240 V secondary. Its tap system provides flexible voltage adjustment to accommodate feeder drop and load variation, reducing the need for external regulators and simplifying panel wiring.
NEMA 3R protects against rain, sleet, and external weather exposure, enabling reliable operation in outdoor equipment spaces or exposed indoor locations. Coupled with UL Listing, it ensures safety and performance in harsh environments common to industrial facilities.
Yes. Its 5 kVA rating, aluminum coil, and compact frame (177) with 9.89 in L x 10.38 in W x 16 in H dimensions facilitate retrofits or panel upgrades. The adjustable taps simplify voltage alignment with minimal reconfiguration of surrounding controls.
The product is UL Listed and features a NEMA 3R enclosure for indoor-outdoor use. These attributes support compliance with safety and environmental requirements in most industrial settings, reducing qualification time for new installations.
Expect reduced field wiring through built-in taps, improved reliability from a rugged enclosure and UL safety certification, and easier maintenance due to accessible dimensions and weight. The 5 kVA rating matches many control circuits, delivering cost-effective power distribution with lower downtime.