Eaton S20N08A05N Transformer - 5 kVA, 60 Hz, UL Listed
Part Number: S20N08A05N
Quick Summary
Eaton S20N08A05N Transformer is a buck-boost device that conditions voltage for control panels in industrial automation. Voltage swings can trigger nuisance trips, degrade sensors, and slow production lines. UL Listed safety certification, a NEMA 3R enclosure for indoor-outdoor environments, and a weather-shielded design support reliable operation in challenging facilities. Designed for 60 Hz operation with 240/480 V primary and 24/48 V secondary, this encapsulated transformer offers compatibility across a broad range of automation equipment. For engineers, it translates to faster commissioning, improved compliance, and predictable power delivery, delivering measurable business value in maintenance cost reduction and uptime across facilities.
Product Information
Extended Description
S20N08A05N Eaton: Eaton General purpose encapsulated transformer, buck-boost general-purpose encapsulated transformer, EP, aluminum, NEMA 3R, 177, 60 Hz, single-phase, 240 V, 480 V, 24/48 V, NONE, 115 °C rise, 5 KVA, indoor-outdoor, 3D
Product Name
Eaton General purpose encapsulated transformer
Catalog Number
S20N08A05N
UPC
786680383403
Product Length/Depth
9.89 in
Product Height
16 in
Product Width
10.38 in
Product Weight
114 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
Catalog Notes
Model N
Coil material
Aluminum
Design
EP
Enclosure
NEMA 3R
Frame
177
Tap size
None
Type
Buck-Boost General-Purpose Encapsulated Transformer
Wiring connection
3D
Frequency rating
60 Hz
Phase
Single-phase
Primary voltage
240 V, 480 V
Secondary Voltage
24/48 V
Temperature rise
115 °C rise
Volt ampere rating
5 kVA
Weathershield
Indoor-Outdoor
Commercial Distribution, Transformers, Volume 2, Tab 2
Eaton Specification Sheet - S20N08A05N
Selling Policy 25-000 - Distribution and Control Products and Services
Feature → Business Impact → Application: Buck-boost capability delivers voltage conditioning that stabilizes sensitive automation loads, reducing nuisance trips and sensor drift in control panels, which translates to lower downtime and higher line efficiency in manufacturing environments. This general-purpose encapsulated transformer supports 60 Hz operation with 240/480 V primary and 24/48 V secondary, enabling rapid integration with existing equipment footprints and simplifying panel design. Application: Ideal for machine enclosures and automation racks where voltage variance is common, improving reliability and extending equipment life. Feature → Business Impact → Application: Aluminum coil construction lowers winding resistance and enhances heat dissipation, contributing to a 115 °C rise rating and robust performance in hot environments. Application: Suitable for indoor-outdoor installations in factories and service bays that require durable, maintenance-friendly components. Feature → Business Impact → Application: NEMA 3R enclosure and indoor-outdoor weather shielding reduce enclosure stocking needs and protect critical components from dust, moisture, and corrosion, resulting in lower total cost of ownership and faster field deployment. Application: Control panels located in variable environments and outdoor spaces. Feature → Business Impact → Application: UL Listed certification provides safety assurance and regulatory compliance, supporting audit readiness and customer qualification tests. Application: Any compliance-driven project in industrial automation, power distribution, and control systems. This transformer’s 5 kVA rating aligns with typical control circuits and small drives, offering a predictable performance envelope that minimizes over-engineering and reduces upfront costs while maintaining reliability across shifts.
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FAQs
For a proper installation, mount the encapsulated transformer in a clean, ventilated enclosure compatible with indoor-outdoor use. Ensure the 240/480 V primary lines are correctly wired to the supply and that the 24/48 V secondary outputs feed the control circuits with appropriate fusing. The NEMA 3R enclosure protects against dust and moisture, simplifying field mounting in mixed environments.
Verify 5 kVA VA rating, 60 Hz frequency, primary voltage of 240 or 480 V, and secondary voltage of 24/48 V. Confirm aluminum coil construction and ambient rise rating of 115 °C. Ensure the wiring connection is compatible with 3D configuration and that the installation aligns with UL Listed safety standards.
Yes. The S20N08A05N is designed for buck-boost voltage conditioning with a 24/48 V secondary, making it well-suited for control circuits, relays, and low-voltage actuators in automation equipment. Its encapsulated, weather-resistant design supports reliable operation in varied industrial environments.
The unit is UL Listed, validating safety compliance for electrical devices. It also features a NEMA 3R enclosure suitable for indoor-outdoor use, providing environmental protection. These attributes help streamline regulatory and customer qualification processes while supporting rugged field deployment.
Maintenance is minimal due to sealed encapsulation and aluminum windings, reducing corrosion risk and improving thermal performance. The 5 kVA rating supports stable operation with modest energy losses, contributing to lower downtime and longer service life. Expect improved panel reliability and faster project ROI through reduced maintenance and fewer tripping events.