Eaton S54N11S05 General-Purpose Transformer - UL Listed
Part Number: S54N11S05
Quick Summary
Eaton S54N11S05 general-purpose encapsulated transformer delivers reliable power for control panels and industrial enclosures. Many installations struggle with moisture ingress, limited space, and mounting compatibility in harsh environments. UL Listed for safety, a NEMA 3R enclosure rating for indoor-outdoor service, and 60 Hz single-phase operation support reliable performance. Equipped with aluminum windings, a 5 kVA rating, multiple primary voltages (120/208/240/277 V) and a 120/240 V secondary, it supports flexible site wiring and rapid deployment. This model’s 5 kVA rating and 120/240 V secondary simplify panel design and reduce installation and maintenance costs. With UL Listed safety certification and NEMA 3R capability, technicians installing in outdoor enclosures can proceed with confidence. Its 60 Hz operation and single-phase design fit a wide range of applications from machine control to distribution panels.
Product Information
Extended Description
S54N11S05 Eaton: Eaton General purpose encapsulated transformer, EP, aluminum, NEMA 3R, 177, 60 Hz, single-phase, 120 V, 208 V, 240 V, 277 V, 120/240 V, NONE, 115 °C rise, 5 KVA, indoor-outdoor, 566B
Product Name
Eaton General purpose encapsulated transformer
Catalog Number
S54N11S05
UPC
786680031588
Product Length/Depth
9.89 in
Product Height
16 in
Product Width
10.38 in
Product Weight
128 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
None
Type
General-Purpose Encapsulated Transformer
Wiring connection
566B
Frequency rating
60 Hz
Phase
Single-phase
Primary voltage
120 V, 208 V, 240 V, 277 V
Secondary Voltage
120/240 V
Temperature rise
115 °C rise
Volt ampere rating
5 kVA
Weathershield
Indoor-Outdoor
Feature → Business Impact → Application: The S54N11S05 uses a rugged encapsulated EP design with aluminum windings, providing moisture resistance and durable operation in harsh environments. This translates to lower maintenance needs and improved uptime for outdoor control panels and on-machine enclosures. Industry teams experience faster commissioning and reduced field repairs, especially in mixed indoor-outdoor facilities where exposure to humidity is a concern. Feature → Business Impact → Application: With a 5 kVA rating and flexible primary voltages (120/208/240/277 V) plus a 120/240 V secondary, designers gain greater wiring flexibility and fewer part substitutions. This reduces inventory complexity and accelerates project timelines in automation cabinets, MCCs, and machine centers. Feature → Business Impact → Application: The NEMA 3R enclosure and Indoor-Outdoor Weathershield designation protect assemblies from water and dust ingress, enabling safe outdoor deployments and maintenance-free operation in damp locations. This is especially valuable for outdoor motor control centers and service panels. Feature → Business Impact → Application: Wiring connection is standardized at 566B with no tap changer, simplifying pre-wiring, installation, and field wiring validation. Benefits include reduced commissioning errors and faster start-up in panel builds and control enclosures. Feature → Business Impact → Application: UL Listed certification paired with Eaton’s warranty policy minimizes regulatory risk and supports long-term ownership costs, which is critical for procurement and asset management teams. This combination strengthens supplier confidence and helps justify capital investment in process automation and packaging lines.
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FAQs
When placing the S54N11S05 in outdoor enclosures, ensure a compliant NEMA 3R environment and secure mounting to minimize vibration. The unit's UL Listed certification supports safety compliance, and its indoor-outdoor weathershield design protects against moisture ingress. Plan for accessible wiring with the 566B connection and provide proper ventilation to maintain the 115 °C rise rating within ambient limits.
The 5 kVA rating provides ample headroom for typical control loads, while the 120/240 V secondary matches common control circuits and motor starters. The 120/208/240/277 V primary options offer wiring flexibility across different supply voltages. This reduces the need for multiple transformers and simplifies panel design, procurement, and installation timelines.
Yes. The transformer is UL Listed for safety and features a NEMA 3R enclosure suitable for indoor-outdoor service. Its aluminum windings and encapsulated EP design contribute to reliability in challenging environments. These certifications and ratings help ensure compliance in most industrial, commercial, and outdoor installation scenarios.
The unit uses a fixed-wiring approach with a 566B connection, and no tap changer is present, which simplifies installation. The enclosure is designed for robust mounting in control cabinets or outdoor enclosures. Verify clearances and ensure the transformer is wired to the appropriate primary voltage and the 120/240 V secondary to the load circuits.
With a rugged NEMA 3R enclosure, aluminum windings, and a 5 kVA rating, the transformer offers durable performance with low maintenance requirements in harsh environments. The UL Listed certification reduces regulatory risk, and the warranty aligns with Eaton’s policy, supporting long-term reliability. The result is lower downtime, reduced replacement needs, and a favorable total cost of ownership for automation projects.