Eaton S44D12S05CU General purpose Transformer - UL Listed
Part Number: S44D12S05CU
Quick Summary
Eaton S44D12S05CU general purpose transformer provides reliable voltage conversion for industrial control panels. Engineers often face enclosure protection challenges, inconsistent tap settings, and mounting complexity, which this encapsulated unit mitigates with a compact footprint and robust construction. Key certifications and design choices include UL Listed safety certification and a rugged NEMA 3R enclosure, engineered for indoor-outdoor service and long life. The device is rated at 5 kVA with a 440 V primary and 120 V secondary, and it features dual taps for precise voltage regulation under load. This combination translates to lower maintenance costs, enhanced uptime, and predictable performance in demanding automation environments. It also aligns with common industry power distribution standards while supporting scalable panel designs.
Product Information
Extended Description
S44D12S05CU Eaton: Eaton General purpose encapsulated transformer, EP, copper, NEMA 3R, 177, 60 Hz, single-phase, 440 V, 120 V, 2 at +2.5% FCAN, 2 at -2.5% FCBN, 115 °C rise, 5 KVA, indoor-outdoor, 517Y
Product Name
Eaton General purpose encapsulated transformer
Catalog Number
S44D12S05CU
UPC
786680075391
Product Length/Depth
9.89 in
Product Height
16 in
Product Width
10.38 in
Product Weight
125 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
Copper
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
517Y
Frequency rating
60 Hz
Phase
Single-phase
Primary voltage
440 V
Secondary Voltage
120 V
Temperature rise
115 °C rise
Volt ampere rating
5 kVA
Weathershield
Indoor-Outdoor
Copper coil windings and epoxy encapsulation deliver low-loss performance and excellent heat management. The business impact is improved reliability and reduced thermal stress, which translates to longer service life in high-cycle control applications. In practice, technicians wire to 517Y terminations, simplifying installation and reducing field wiring errors in control panels and switchgear assemblies. Dual voltage taps (+2.5% / -2.5%) allow on-site voltage compensation without replacing transformers, saving time on commissioning and minimizing voltage-related equipment stress. The application is critical in facilities with fluctuating mains, ensuring feed stability for PLCs and relays while meeting tolerances defined by FCBN/FCAN specifications. NEMA 3R enclosure provides weather resistance for indoor-outdoor installations, reducing spare parts and enabling a single part to cover diverse locations. The business impact is a streamlined procurement process and reduced inventory. 60 Hz single-phase operation matches standard industrial power distribution, enabling straightforward integration with existing panels and bus systems, minimizing risk during retrofit projects. With a 5 kVA rating, this transformer supports a range of control circuits and compact drive interfaces without over-sizing, yielding installation cost reductions and improved energy efficiency. The design also emphasizes Eaton reliability and compatibility with EP design standards for long-term asset performance.
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FAQs
The S44D12S05CU is designed for seamless integration in standard control panels, utilizing 517Y wiring connections and a compact footprint. Its NEMA 3R enclosure supports indoor-outdoor mounting, reducing enclosure substitutions and enabling straightforward mounting alongside common DIN rail and terminal blocks. Ensure panel space accommodates the 9.89 in depth, 16 in height, and 10.38 in width.
Key specs include a 5 kVA rating, 440 V primary, 120 V secondary, single-phase operation, and a 60 Hz frequency rating. It offers dual taps at +2.5% and -2.5% to adjust voltage during load fluctuations, with copper coil windings for low resistance and efficient heat management.
Yes. The transformer features a rugged NEMA 3R enclosure designed for indoor-outdoor service, providing weather resistance and protection against moisture and dust. This makes it suitable for outdoor control cabinets and exposed indoor locations without needing a separate enclosure.
The unit carries UL Listed certification, signaling compliance with established safety standards. While the data set does not list CE or IP ratings, the UL listing combined with the NEMA 3R enclosure provides strong safety and environmental protection for typical factory floors and outdoor installations.
Encapsulation and copper windings reduce temperature rise and aging, lowering maintenance needs and extending service life. The dual taps enable voltage optimization on-site, potentially reducing equipment stress and energy waste. A 5 kVA rating supports multiple control circuits with a compact footprint, contributing to lower installation and inventory costs while improving uptime in automation systems.