Eaton S34N12S26 General-Purpose Transformer - UL Listed
Part Number: S34N12S26
Quick Summary
The Eaton S34N12S26 General-Purpose Transformer steps 240/277 V to 120 V for control panels. In tight electrical cabinets or rugged environments, a compact, reliable transformer reduces panel footprint and downtime. It is UL Listed and housed in a NEMA 3R enclosure for indoor-outdoor use. Designed for 60 Hz single-phase operation at 0.25 kVA, it supports versatile, compliant power for general distribution in commercial and light-industrial settings. Its aluminum coil reduces weight and simplifies field servicing, improving installation efficiency and total cost of ownership.
Product Information
Extended Description
S34N12S26 Eaton: Eaton General purpose encapsulated transformer, EP, aluminum, NEMA 3R, 56, 60 Hz, single-phase, 240/277 V, 120 V, NONE, 115 °C rise, 0.25 KVA, indoor-outdoor, 451B
Product Name
Eaton General purpose encapsulated transformer
Catalog Number
S34N12S26
UPC
786680031205
Product Length/Depth
4.06 in
Product Height
8.97 in
Product Width
4.87 in
Product Weight
12 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
56
Tap size
None
Type
General-Purpose Encapsulated Transformer
Wiring connection
451B
Frequency rating
60 Hz
Phase
Single-phase
Primary voltage
240/277 V
Secondary Voltage
120 V
Temperature rise
115 °C rise
Volt ampere rating
0.25 kVA
Weathershield
Indoor-Outdoor
Feature: 0.25 kVA, 60 Hz, single-phase transformer with 240/277 V primary and 120 V secondary. Business Impact: This compact specification supports dependable general-purpose power without oversizing panels or feeders, helping design engineers meet space and efficiency goals. Application: Perfect for control panels, instrumentation, and light automation in commercial and light-industrial installations. Feature: NEMA 3R enclosure with indoor-outdoor capability and aluminum coil. Business Impact: Provides rugged durability in exposed environments while keeping weight manageable for field installation. Application: Suitable for outdoor-rated cabinet installations or damp indoor spaces where safety and reliability matter. Feature: Fixed-wiring connection (451B) with no tap settings. Business Impact: Reduces wiring complexity and error risk during commissioning, accelerating installation. Application: Installers benefit from standardized connections in new builds and retrofit projects. Feature: 115°C temperature rise rating and 60 Hz single-phase operation. Business Impact: Ensures predictable performance under typical industrial ambient temperatures, improving uptime and reducing overheat concerns. Application: Ideal for general-purpose transformers in motor control centers and instrument panels requiring steady voltage. Feature: UL Listed certification and one-year warranty (Eaton policy 25-000). Business Impact: Supports regulatory compliance, supplier confidence, and lower maintenance costs over the product life. Application: Procurement teams rely on trusted approvals for enterprise installations in commercial and light-industrial sectors. Feature: Compact physical footprint with precise dimensions (4.06 in depth, 4.87 in width, 8.97 in height) and 56 frame. Business Impact: Enables flexible panel layouts and easier retrofits in space-constrained enclosures. Application: Retrofit projects and new builds where mounting clearance is limited.
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FAQs
Mount the S34N12S26 in a suitable enclosure with ample ventilation. Use the fixed-wiring connection (451B) and connect the 240/277 V primary to the intended supply and the 120 V secondary to the control circuits. With no taps, wiring is straightforward, reducing commissioning time and wiring errors. Its 4.06 in depth, 4.87 in width, and 8.97 in height fit compact panel spaces, making retrofits simpler.
Key specs include 0.25 kVA rating, 60 Hz frequency, single-phase operation, primary 240/277 V, and secondary 120 V. The transformer uses an aluminum coil and provides a 115 °C rise, suitable for typical industrial ambient conditions. Ensure the panel system requires 120 V downstream from a 240/277 V source and plan for the NEMA 3R enclosure in environments that may experience moisture.
Yes. The S34N12S26 is designed for indoor-outdoor use thanks to a NEMA 3R enclosure, which offers rain and ice resistance for panel installations exposed to the elements. This makes it a practical choice for outdoor enclosures or damp indoor spaces, provided the surrounding installation adheres to relevant safety standards and wiring practices.
The unit is UL Listed, confirming safety compliance for electrical equipment. It features a 25-000 Eaton warranty policy (one year from installation or eighteen months from shipment, whichever occurs first). These certifications and the enclosure design support regulatory alignment and predictable maintenance planning for industrial deployments.
With a lightweight aluminum coil, a compact footprint, and fixed-wiring connections, installation is faster and maintenance is simplified. The UL certification and NEMA 3R enclosure reduce risk in harsh environments, while the 0.25 kVA rating matches typical control-panel loads, delivering reliable power distribution and helping lower lifecycle costs through reduced downtime.