Eaton S12N29S03 General-Purpose Transformer - UL Listed
Part Number: S12N29S03
Quick Summary
The Eaton S12N29S03 General-Purpose Encapsulated Transformer delivers 3 kVA power isolation for single-phase control panels. In demanding environments, moisture, dust, and enclosure exposure can threaten reliability, but this unit's encapsulated design and NEMA 3R enclosure help mitigate that risk. It carries UL Listed certification and is suitable for indoor-outdoor use, supporting flexible installation in a variety of facilities. The aluminum coil construction and 60 Hz operation optimize efficiency for common control circuits, with a 120 V primary and 208 V secondary. The rugged, compact form and ease of sourcing streamline procurement and maintenance, reducing downtime and total cost of ownership for industrial power distribution.
Product Information
Extended Description
S12N29S03 Eaton: Eaton General purpose encapsulated transformer, EP, aluminum, NEMA 3R, 176, 60 Hz, single-phase, 120 V, 208 V, NONE, 115 °C rise, 3 KVA, indoor-outdoor, 519X
Product Name
Eaton General purpose encapsulated transformer
Catalog Number
S12N29S03
UPC
786680087820
Product Length/Depth
8 in
Product Height
14.25 in
Product Width
7.69 in
Product Weight
68 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
176
Tap size
None
Type
General-Purpose Encapsulated Transformer
Wiring connection
519X
Frequency rating
60 Hz
Phase
Single-phase
Primary voltage
120 V
Secondary Voltage
208 V
Temperature rise
115 °C rise
Volt ampere rating
3 kVA
Weathershield
Indoor-Outdoor
Encapsulated design with aluminum coil → Improves moisture resistance and insulation integrity, increasing uptime in wash-down and dusty environments; enhances reliability for critical loads in automation and controls. Control-panel compatibility → Simplifies integration with standard 120 V supply and 208 V downstream equipment, reducing refurbishment time and inventory complexity. NEMA 3R indoor-outdoor enclosure → Enables safe outdoor installation and cabinet integration, expanding placement options in manufacturing floors and service yards. 3 kVA rating at 60 Hz, single-phase → Supports common automation loads with predictable voltage translation, improving efficiency and reducing transformer count in power-distribution schemes. UL Listed certification → Calibrates compliance with electrical safety standards, facilitating procurement approvals and regulatory reporting. Footprint and mounting considerations (Frame 176, 8 in length, 14.25 in height, 7.69 in width) → Offers a compact, mountable solution that integrates into existing housings with minimal rework. Weight around 68 lb → Balances rugged vibration tolerance with manageable handling during installation and relocation. Weathershield for indoor-outdoor use → Provides extended service life in environments with temperature variations and exposure to the elements. Wiring connection 519X → Delivers a proven, straightforward connection scheme that reduces wiring errors and onboarding time for field technicians. Temperature rise of 115 °C → Supports sustained loading scenarios while maintaining performance within thermal limits, improving continuity for peak demand events.
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FAQs
Yes. The S12N29S03 is a single-phase transformer with a 120 V primary and 208 V secondary rated at 3 kVA, designed to step voltages for 208 V equipment from a 120 V source. The enclosure is rated for indoor-outdoor use, and wiring connections follow a 519X scheme, supporting straightforward panel mounting and wiring in standard control configurations.
A 3 kVA rating indicates the transformer can deliver up to roughly 24 A at 208 V or 25 A at 120 V, depending on load balance, while maintaining performance. This helps engineers dimension power for controllers, sensors, and small drives. Operating near rated load at 60 Hz ensures predictable voltage regulation and minimizes overheating with proper cooling and enclosure placement.
Yes. The S12N29S03 features a NEMA 3R enclosure and indoor-outdoor suitability, making it appropriate for outdoor installations or damp environments common in manufacturing floors. Its encapsulated construction protects wind-driven moisture and dust ingress, while the aluminum coil design maintains efficiency and reduces corrosion concerns over long service life.
The transformer is UL Listed, signaling conformance to recognized electrical safety standards. This certification streamlines procurement approvals, audit readiness, and regulatory compliance for industrial facilities. The NEMA 3R enclosure further supports compliance with environmental protection requirements for indoor-outdoor applications and ensures safe operation in varied conditions.
Choose a location with adequate ventilation and spacing to sustain ambient temperatures within the 115 °C rise limit. Use the 519X wiring connection scheme for clean, error-resistant terminations. The compact 176 frame and 68 lb weight simplify mounting and service, reducing downtime during installation and periodic maintenance while extending service life through robust enclosure protection.