Eaton S20P11E05 General-Purpose Transformer - UL Listed
Part Number: S20P11E05
Quick Summary
Eaton S20P11E05 is a general purpose encapsulated transformer for reliable power in control panels. Engineers face space constraints, heat, and shielding challenges in compact distributions, and a robust unit like this helps reduce enclosure size without sacrificing safety. It carries UL Listed certification and a rugged NEMA 3R enclosure, designed for indoor-outdoor service, giving you one component to simplify sourcing and compliance. With a 5 kVA rating, single-phase operation, and a 60 Hz frequency, it supports common control circuits while preserving voltage integrity. This combination delivers steady performance, lower maintenance, and predictable energy use, helping you meet uptime targets and budget constraints across facilities.
Product Information
Extended Description
S20P11E05 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, 121B
Product Name
Eaton General purpose encapsulated transformer
Catalog Number
S20P11E05
UPC
786680074608
Product Length/Depth
9.89 in
Product Height
16 in
Product Width
10.38 in
Product Weight
113 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
121B
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
Special features
Electrostatically shielded
Weathershield
Indoor-Outdoor
Feature is encapsulated and electrostatically shielded, which reduces moisture ingress and electrical noise. Business impact: higher reliability and longer service life in harsh environments, lowering maintenance costs. Application: ideal for compact control panels in manufacturing lines where space is at a premium. Feature aluminum windings reduce weight and improve thermal performance, enabling easier handling during installation and service calls. Business impact: faster commissioning and reduced field labor costs. Application: panel integrations and retrofits in dusty or humid facilities. Feature NEMA 3R indoor-outdoor enclosure supports versatile mounting locations, saving procurement time on separate enclosures. Business impact: expands installation options and reduces total installed cost. Application: outdoor or semi-exposed locations such as loading docks or exterior equipment rooms. Feature 5 kVA rating with 60 Hz single-phase operation and dual primary voltages (240/480 V) with secondary 120/240 V. Business impact: simplifies powering 120/240 V circuits from common mains while maintaining voltage regulation under moderate load. Application: control circuits, motor starters, and instrumentation in industrial plants. Feature adjustable taps (+5% FCAN, -5% FCBN x 2, +2.5% FCAN, -2.5% FCBN). Business impact: maintains output under line fluctuations, reducing equipment stress and improving performance. Application: critical instrumentation and PLC power supplies. Feature UL Listed certification confirms safety compliance, while an electrostatically shielded design minimizes EMI. Business impact: supports regulatory requirements and reduces risk in sensitive environments. Application: safety-conscious installations across manufacturing and distribution. The overall package delivers predictable energy use, efficient installation, and dependable power distribution for industrial automation projects.
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FAQs
The S20P11E05 supports a 121B wiring connection and a NEMA 3R enclosure, enabling both indoor and outdoor mounting. Its 177-frame construction complements compact panel designs, and the unit’s UL Listed safety certification helps streamline compliance. This combination reduces the need for additional enclosures, simplifies wiring methods, and accelerates panel commissioning.
Tap options include 1 at +5% FCAN, 2 at -5% FCBN, 2 at +2.5% FCAN, and 4 at -2.5% FCBN. These taps allow voltage adjustment to compensate for line drops or fluctuations, maintaining a stable 120/240 V secondary output from a 240/480 V primary. This reduces nuisance tripping and protects sensitive loads.
Yes. The transformer features an indoor-outdoor NEMA 3R enclosure, designed to withstand exposure to moisture, dust, and varying ambient conditions when installed per local electrical codes. Its aluminum windings and robust insulation further support reliable operation in outdoor or semi-exposed installations, making it a versatile choice for external control panels.
The S20P11E05 is UL Listed, confirming compliance with recognized safety standards. This certification supports regulatory acceptance in many regions and simplifies utility and spec-sheet reviews for procurement. While other regional certifications may apply, UL Listed status provides a strong, verifiable baseline for safe operation in industrial environments.
With a one-year warranty from installation (or 18 months from shipment) and durable aluminum windings, expected lifecycle maintenance is minimal. Routine checks focus on visual inspection, connection torque, and enclosure integrity. The 5 kVA rating and robust enclosure help reduce downtime and spare-part needs, delivering a favorable total cost of ownership for automation and power-distribution applications.