Eaton S27N12P51P Encapsulated Transformer - UL Listed

Part Number: S27N12P51P
Manufacturer
Eaton
Part number
S27N12P51P

Quick Summary

The Eaton S27N12P51P encapsulated transformer delivers reliable 0.5 kVA power for control panels and industrial loads. For engineers facing moisture, space constraints, and mounting challenges in harsh environments, this unit offers a rugged, compact solution. It carries UL Listed certification and a NEMA 3R enclosure rating, providing robust protection against moisture and dust in indoor-outdoor applications. With aluminum coil construction for lighter weight and efficient heat dissipation, the device helps keep cabinets cooler and maintenance needs lower. Rated for 60 Hz single-phase operation with a 277 V primary and 120 V secondary, it aligns with common plant power architectures, accelerating procurement and reducing installation risk.

Product Information

Extended Description

S27N12P51P Eaton: Eaton General purpose encapsulated transformer, EP, aluminum, NEMA 3R, 57P, 60 Hz, single-phase, 277 V, 120 V, NONE, 115 °C rise, 0.5 KVA, indoor-outdoor, 511DD
Product Name
Eaton General purpose encapsulated transformer
Catalog Number
S27N12P51P
UPC
786680088131
Product Length/Depth
5.18 in
Product Height
9.34 in
Product Width
4.45 in
Product Weight
14 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
57P
Tap size
None
Type
General-Purpose Encapsulated Transformer
Wiring connection
511DD
Frequency rating
60 Hz
Phase
Single-phase
Primary voltage
277 V
Secondary Voltage
120 V
Temperature rise
115 °C rise
Volt ampere rating
0.5 kVA
Weathershield
Indoor-Outdoor
Encapsulated design enhances durability in challenging environments. The EP enclosure isolates windblown dust and humidity from windings, reducing the risk of insulation failure and unexpected downtime. This makes the transformer an ideal fit for control panels in wet plant areas and outdoor equipment enclosures, where reliability matters most in critical manufacturing lines. With a 0.5 kVA rating, it powers essential control circuits without overbuilding the panel. This translates to smaller cabinet footprints, lower heat generation, and reduced energy waste while maintaining responsive performance for relays, sensors, and PLC power supplies. The device provides a 277 V primary to 120 V secondary at 60 Hz single-phase, aligning with common plant power architectures, simplifying upstream wiring. This compatibility reduces engineering time and improves device interoperability across motor starters, contactors, and HMI power rails. The NEMA 3R enclosure plus aluminum coil lowers weather exposure and weight, enabling easy outdoor installations and rooftop or mezzanine panels. Aluminum construction supports corrosion resistance and efficient heat dissipation, contributing to longer service intervals and safer handling during maintenance. Wiring connection 511DD and the 57P frame offer robust mounting and reliable harnessing within crowded control cabinets. The combination supports straightforward retrofits and seamless integration with existing cable loom layouts, while tight tolerances help minimize vibration and noise in mission-critical lines. UL Listed certification provides safety assurance, and the unit ships with a standard one-year warranty under Eaton's policy, helping protect capital investment and streamline procurement. Together, these features deliver a dependable, easy-to-specify transformer for industrial automation applications.

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FAQs

Begin with confirming enclosure compatibility (NEMA 3R) and ensure the 511DD wiring harness aligns with your panel connector layout. Mount the transformer on a stable surface, secure with appropriate hardware, and route leads to the 277 V primary and 120 V secondary circuits. Observe thermal clearances and maintain proper creepage distances to prevent arcing in crowded cabinets.
Primary voltage is 277 V, secondary voltage 120 V, frequency 60 Hz, single-phase operation, and a 0.5 kVA VA rating. The coil is aluminum, enclosure is NEMA 3R, temperature rise is 115 °C, and it uses wiring connection 511DD. These specs support predictable control panel power for PLCs, relays, and sensors.
Yes. The NEMA 3R enclosure provides indoor-outdoor protection, and aluminum coil construction reduces weight while improving heat dissipation. This combination enables reliable operation in damp, dusty, or exposed facility areas, making it a strong candidate for outdoor panels, rooftops, or vendor-maintained equipment.
The unit is UL Listed, indicating compliance with established safety standards. Its NEMA 3R enclosure further ensures protection against moisture and dust for indoor-outdoor use. These certifications support procurement through compliance documentation and simplify installation in regulated industrial environments.
Aluminum windings and a rugged encapsulated design reduce heat buildup and wear, potentially lowering maintenance frequency. The compact footprint and reliable UL Listed safety profile simplify spares stocking and retrofits, which can shorten downtime, improve energy efficiency, and lower total cost of ownership in automation projects.