Eaton S20N11S85N General purpose transformer - UL Listed
Part Number: S20N11S85N
Quick Summary
Eaton S20N11S85N general purpose encapsulated transformer provides compact voltage conversion for control panels and equipment rooms. Facility engineers often wrestle with outdoor environments, space constraints, and matching primary voltages. UL Listed and NEMA 3R enclosure ensure weather resistance, while 60 Hz single-phase operation aligns with standard plant power. This buck-boost design reduces inventory, streamlines maintenance, and supports indoor-outdoor installations across demanding industrial environments. Rated at 0.075 kVA with dual primary voltages of 240 V and 480 V and secondary 120/240 V, it adapts to varied supply conditions. Its compact dimensions—3.2 in depth, 5.1 in width, and 6.3 in height—facilitate simple mounting in existing panels while meeting NEMA 3R weather resilience.
Product Information
Extended Description
S20N11S85N Eaton: Eaton General purpose encapsulated transformer, buck-boost general-purpose encapsulated transformer, EP, aluminum, NEMA 3R, 54, 60 Hz, single-phase, 240 V, 480 V, 120/240 V, NONE, 115 °C rise, 0.075 KVA, indoor-outdoor, 3A
Product Name
Eaton General purpose encapsulated transformer
Catalog Number
S20N11S85N
UPC
786680383069
Product Length/Depth
3.2 in
Product Height
6.3 in
Product Width
5.1 in
Product Weight
6 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
Model N
Coil material
Aluminum
Design
EP
Enclosure
NEMA 3R
Frame
54
Tap size
None
Type
Buck-Boost General-Purpose Encapsulated Transformer
Wiring connection
3A
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
0.075 kVA
Weathershield
Indoor-Outdoor
Feature: Buck-boost general-purpose encapsulated transformer. Business Impact: Enables voltage regulation within a single device, reducing the need for multiple converters and lowering total cost of ownership. Application: Control panels and automation cabinets where supply voltage fluctuates. Feature: Aluminum coil and EP design in a rugged NEMA 3R enclosure. Business Impact: Improves heat dissipation and environmental tolerance, reducing maintenance cycles and failure risk. Application: Indoor-outdoor installations in manufacturing floors and outdoor switchgear. Feature: 60 Hz single-phase operation with 240/480 V primary and 120/240 V secondary. Business Impact: Seamless integration with standard industrial power systems, accelerating procurement and commissioning. Application: General-purpose automation, instrumentation, and panel power distribution. Feature: 0.075 kVA rating and compact footprint. Business Impact: Minimal space occupancy and load capacity aligned with small to mid-size equipment, enabling tighter panel layouts. Application: Small drives, relays, sensors, and automation modules. Feature: UL Listed certification and 25-000 warranty terms. Business Impact: Procurement confidence and long-term reliability, reducing risk in regulated environments. Application: Engineering specs and compliance documentation for quotes and audits. Feature: Indoor-outdoor versatility and corrosion-resistant enclosure. Business Impact: Extends service life across diverse environmental conditions, lowering replacement costs. Application: Outdoor enclosures, weather-exposed machinery, and robust control systems. Feature: 3A wiring compatibility and standard frame 54 with 3.2 in depth. Business Impact: Simplifies installation planning and minimize retraining of staff during maintenance. Application: Retrofit projects and new builds in factories and facilities management.
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FAQs
Begin with confirming the NEMA 3R enclosure suits the installation site and that there is adequate clearance for cooling. The unit’s 3.2 in depth and 5.1 in width facilitate panel cutouts, and its 6 lb weight eases handling. Adhere to 3A wiring standards and ensure the primary voltage matches your supply (240 V or 480 V) with a 120/240 V secondary.
The S20N11S85N supports 240 V and 480 V primary inputs and provides a 120/240 V secondary. It is a buck-boost general-purpose transformer rated at 0.075 kVA, designed for single-phase, 60 Hz operation. This combination allows voltage adaptation within standard industrial power architectures, simplifying panel design and component sourcing.
Yes. The S20N11S85N is built with a NEMA 3R enclosure intended for indoor-outdoor use, offering weather resistance suitable for exposed equipment and outdoor installations. UL Listed certification further supports use in regulated environments, giving procurement teams confidence in performance and durability across temperature and humidity ranges.
Absolutely. The buck-boost design is tailored for voltage regulation in automation and control panels, allowing minor supply fluctuations to be corrected without additional equipment. This reduces voltage-related downtime, improves device performance, and simplifies maintenance planning, especially in facilities with variable incoming power or long cable runs.
Eaton provides a one-year warranty from the date of installation or an 18-month warranty from the date of shipment, whichever comes first, under policy 25-000. In addition to warranty coverage, Eaton’s specification sheets and product catalogs offer installation guidance and application notes to support engineers during procurement and commissioning.