Eaton S38D11S05 General-Purpose Transformer - UL Listed
Part Number: S38D11S05
Quick Summary
The Eaton S38D11S05 General-Purpose Transformer delivers reliable low-voltage isolation and power conversion for commercial and industrial control panels. Engineers often face challenges protecting control circuits from voltage fluctuations while meeting rugged environmental requirements. The unit’s UL Listed certification, NEMA 3R enclosure, and indoor-outdoor capability provide robust compliance and long-term durability in harsh facilities. With a 5 kVA rating and a primary of 380 V stepping down to 120/240 V, it supports scalable automation in compact footprints, streamlining panel layouts and reducing wiring complexity. This combination delivers consistent performance, easier maintenance, and lower total cost of ownership for panel builders and machine integrators.
Product Information
Extended Description
S38D11S05 Eaton: Eaton General purpose encapsulated transformer, EP, aluminum, NEMA 3R, 177, 60 Hz, single-phase, 380 V, 120/240 V, 2 at +2.5% FCAN, 2 at -2.5% FCBN, 115 °C rise, 5 KVA, indoor-outdoor, 16D
Product Name
Eaton General purpose encapsulated transformer
Catalog Number
S38D11S05
UPC
786680080807
Product Length/Depth
9.89 in
Product Height
16 in
Product Width
10.38 in
Product Weight
111 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
2 at +2.5% FCAN, 2 at -2.5% FCBN
Type
General-Purpose Encapsulated Transformer
Wiring connection
16D
Frequency rating
60 Hz
Phase
Single-phase
Primary voltage
380 V
Secondary Voltage
120/240 V
Temperature rise
115 °C rise
Volt ampere rating
5 kVA
Weathershield
Indoor-Outdoor
Commercial Distribution, Transformers, Volume 2, Tab 2
Eaton Specification Sheet - S38D11S05
Selling Policy 25-000 - Distribution and Control Products and Services
Encapsulated construction with aluminum coil enhances moisture resistance and electrical isolation, reducing insulation failures in humid environments. This translates to lower maintenance costs, fewer unplanned outages, and improved equipment uptime for critical automation lines. The robust design also minimizes insulation migration and external contamination, simplifying service intervals and enabling cleaner, safer panel interiors in harsh facilities. The NEMA 3R indoor-outdoor enclosure provides weather-resistance that supports outdoor installs and damp indoor spaces, allowing you to consolidate enclosures, save on installation time, and reduce overall system footprint. Voltage taps with +2.5% FCAN and -2.5% FCBN deliver practical regulation to compensate for supply swings, improving downstream device stability and protecting sensitive electronics. The 5 kVA rating aligns with typical control-circuit loads, enabling scalable expansion without over-sizing equipment. With aluminum windings, 60 Hz operation, and a compact frame, this transformer offers efficient heat dissipation and straightforward panel integration for motor starters, PLCs, and automation equipment. The unit’s 115 °C rise supports reliable continuous operation in warmer facilities while maintaining safe temperature margins, reducing the risk of thermal degradation. A UL Listed certification reinforces compliance with safety standards, adding confidence for audits and maintenance planning. The inclusion of a 16D wiring connection and Eaton’s warranty policy enhances installation speed and post-install support, translating to lower total cost of ownership over the product life cycle.
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FAQs
Install the S38D11S05 on a suitable mounting surface that accommodates its 177 frame and 16D wiring. Provide ample clearance for cooling and attach the unit to a grounded chassis. Connect the 380 V primary and 120/240 V secondary per the wiring diagram, taking into account the 111 lb weight and the enclosure’s NEMA 3R rating.
Verify the primary voltage of 380 V and secondary of 120/240 V, the single-phase, 60 Hz operation, and the 5 kVA VA rating. Confirm the tap changer options: two taps at +2.5% FCAN and two at -2.5% FCBN. Check enclosure ratings (NEMA 3R) and the aluminum coil construction for reliability in your environment.
Yes. The S38D11S05 features a NEMA 3R enclosure and is specified as indoor-outdoor (Weathershield). This makes it appropriate for sheltered outdoor locations and damp indoor spaces, reducing the need for separate protective enclosures and simplifying installation in mixed environments.
The transformer is UL Listed, which supports safety compliance and streamlines regulatory audits. The indoor-outdoor rating (NEMA 3R) and rugged encapsulated design also contribute to environmental protection credentials, reducing the risk of field failures and facilitating maintenance planning in harsh facilities.
Eaton provides a warranty policy (Selling Policy 25-000) offering one year from installation or eighteen months from shipment, whichever occurs first. This, combined with Eaton’s engineering support and availability of datasheets and spec sheets, helps minimize downtime and supports long-term maintenance planning for panel builders.