Eaton S38N12S05 General-Purpose Encapsulated Transformer - UL Listed
Part Number: S38N12S05
Quick Summary
Eaton S38N12S05 General-Purpose Encapsulated Transformer is a rugged power conversion solution for equipment controls in industrial facilities. Engineers often face downtime and wiring surprises when transformer specs don’t align with control panels or ambient conditions. UL Listed certification and a NEMA 3R enclosure support safe outdoor installation, while the aluminum coil and 5 kVA rating deliver robust performance. This model complements 380 V to 120 V control circuits on 60 Hz systems, delivering reliable power with a compact, install-ready footprint. Choose Eaton for proven transformer performance, streamlined maintenance, and a partner with extensive industry experience in power management and distribution.
Product Information
Extended Description
S38N12S05 Eaton: Eaton General purpose encapsulated transformer, EP, aluminum, NEMA 3R, 177, 60 Hz, single-phase, 380 V, 120 V, NONE, 115 °C rise, 5 KVA, indoor-outdoor, 511P
Product Name
Eaton General purpose encapsulated transformer
Catalog Number
S38N12S05
UPC
786680087875
Product Length/Depth
9.89 in
Product Height
16 in
Product Width
10.38 in
Product Weight
116 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
511P
Frequency rating
60 Hz
Phase
Single-phase
Primary voltage
380 V
Secondary Voltage
120 V
Temperature rise
115 °C rise
Volt ampere rating
5 kVA
Weathershield
Indoor-Outdoor
Commercial Distribution, Transformers, Volume 2, Tab 2
Eaton Specification Sheet - S38N12S05
Selling Policy 25-000 - Distribution and Control Products and Services
Feature → Business Impact → Application: General-purpose encapsulated design (EP) with a NEMA 3R enclosure enables indoor-outdoor installation, reducing enclosure management costs and speeding up deployment on rugged plant floors. This translates to less downtime and fewer field trips for weatherproofing. Application: control stations, outdoor enclosures, and equipment racks in manufacturing lines. Feature → Business Impact → Application: 5 kVA, single-phase transformer with 380 V primary and 120 V secondary supports mid-range loads with minimal voltage drop, improving PLC stability and minimizing nuisance trips. Application: motor starters, relays, and instrumentation panels in control rooms and hazardous environments. Feature → Business Impact → Application: Aluminum windings and 115 °C rise provide thermal resilience under continuous duty, lowering the risk of hot spots and extending service life. Application: continuous operation in high-temperature factories and exposed outdoor locations. Feature → Business Impact → Application: 511P wiring and absence of taps simplify wiring, cut installation time, and reduce wiring errors. Application: new panel builds and retrofits where fast commissioning matters. Feature → Business Impact → Application: UL Listed certification and a 177 frame with a compact footprint deliver compliant, space-efficient power conversion in compact switchgear. Application: standard-building automation panels and compact control cabinets. Feature → Business Impact → Application: Indoor-Outdoor weather resistance and a robust 9.89 in depth by 10.38 in width footprint fit into narrow enclosures, enabling flexible layout. Application: retrofit projects and modular control architectures in factories and facilities with limited installation space.
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FAQs
The S38N12S05 uses a 177 frame, measures 9.89 in (depth) by 10.38 in (width) by 16 in (height), and weighs 116 lb, with 511P wiring. Its NEMA 3R enclosure and UL Listed certification ensure safe integration into both indoor and outdoor switchgear. When planning, verify mounting clearance, ensure panel cutouts accommodate the 511P terminal block, and confirm the enclosure can handle ambient temperatures up to the 115°C rise rating. This reduces retrofit time and minimizes field adjustments.
This transformer is single-phase with a 380 V primary and 120 V secondary, rated at 5 kVA, operating at 60 Hz. The 115°C rise indicates it can run close to its thermal limit under load without overheating. These specs support stable control panel operation for mid-sized automation loads, minimize voltage drop across feeders, and provide consistent relay and PLC performance during peak demand. No taps are required, simplifying setup.
Yes. The S38N12S05 features a NEMA 3R enclosure rated for indoor-outdoor use and aluminum coil construction, which resists corrosion and maintains performance in challenging environments. UL Listed certification adds a safety layer for electrical installations. For outdoor use, ensure weather exposure is within enclosure protection limits and provide proper mounting to withstand environmental conditions.
The product is UL Listed, providing recognized safety certification for electrical devices and diminishing compliance risk in commercial and industrial installations. The NEMA 3R enclosure further aligns with industry standards for outdoor or semi-enclosed settings. Together, these credentials support regulatory adherence, safer commissioning, and smoother passing of inspections during plant upgrades or new builds.
With a robust 5 kVA rating, single-phase operation, and a rugged indoor-outdoor enclosure, maintenance needs are modest and predictable. The absence of tap changers reduces mechanical wear points, lowering future maintenance costs. The aluminum windings resist corrosion, improving long-term reliability, which translates to fewer unplanned outages, reduced service calls, and improved uptime for critical control circuits.