Eaton S34N12S51 General-Purpose Transformer - UL Listed
Part Number: S34N12S51
Quick Summary
Eaton S34N12S51 General-Purpose Transformer is a compact, single-phase solution for control panels and industrial equipment. When space is tight or outdoor exposure is likely, installation and reliability become the defining challenges. This UL Listed device uses a rugged NEMA 3R enclosure and a weather-resilient indoor-outdoor design to meet real-world conditions, supported by an aluminum coil and a 0.5 kVA rating. The result is a dependable, cost-effective power-transforming option that fits seamlessly into electrical assemblies, power distribution schemes, and automation panels. In addition to the core voltage conversion, this transformer aligns with essential procurement criteria while supporting ongoing maintenance and uptime in modern facilities.
Product Information
Extended Description
S34N12S51 Eaton: Eaton General purpose encapsulated transformer, EP, aluminum, NEMA 3R, 57, 60 Hz, single-phase, 240/277 V, 120 V, NONE, 115 °C rise, 0.5 KVA, indoor-outdoor, 451B
Product Name
Eaton General purpose encapsulated transformer
Catalog Number
S34N12S51
UPC
786680031212
Product Length/Depth
4.91 in
Product Height
8.97 in
Product Width
4.87 in
Product Weight
16 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
57
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
0.5 kVA
Weathershield
Indoor-Outdoor
Commercial Distribution, Transformers, Volume 2, Tab 2
Eaton Specification Sheet - S34N12S51
Selling Policy 25-000 - Distribution and Control Products and Services
Feature: 0.5 kVA single-phase transformer with primary 240/277 V and secondary 120 V. Business Impact: Provides precise voltage conversion for low-voltage control circuits, increasing device compatibility and reducing the risk of miswiring. Application: Ideal for control panels, machine interfaces, and automation wiring where compact power conversion is required. Feature: Aluminum coil construction. Business Impact: Reduces weight and material cost while maintaining thermal performance, improving handling during installation and service. Application: Field replacements and OEM panel builds where weight and space are critical. Feature: NEMA 3R enclosure with indoor-outdoor weather rating. Business Impact: Enables reliable operation in varied environments, lowering enclosure-related failure risk and maintenance frequency. Application: Outdoor installations, damp environments, and semi-exposed control cabinets. Feature: Weathershield Indoor-Outdoor capability. Business Impact: Extends lifecycle in challenging environments, lowering total cost of ownership and downtime. Application: Outdoor electrical rooms, protected external panels, and gateway cabinets. Feature: Wiring connection 451B. Business Impact: Supports standard, repeatable installation and compatibility across devices in a control system. Application: System integrator deployments requiring consistent wiring schemes. Feature: Temperature rise 115 °C. Business Impact: Provides a clear thermal margin for short-term overloads and steady operation, preserving component life. Application: Continuous operation in demanding automation loops. Feature: UL Listed certification. Business Impact: Demonstrates compliance and safety standard adherence, easing approvals and customer confidence. Application: Procurement, compliance audits, and product qualification for regulated environments. Feature: 60 Hz, 240/277 V primary, 120 V secondary. Business Impact: Broad compatibility with lighting, motors, and control circuits common in industrial settings. Application: Plant floor power distribution and panel-integration scenarios.
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FAQs
The S34N12S51 is UL Listed and housed in a NEMA 3R enclosure for indoor-outdoor use. Plan for mounting in a control panel or cabinet with adequate clearance, and connect 240/277 V primary to 120 V secondary via the 451B wiring configuration. With a 16 lb weight and compact footprint, it’s straightforward to position in tight enclosures and limited rack spaces.
This transformer is a single-phase, 60 Hz device with a 0.5 kVA rating. It converts 240/277 V on the primary to 120 V on the secondary and uses an aluminum-coil winding for efficient performance. The enclosure supports indoor-outdoor installations, and the unit carries UL Listed certification for safety and compliance.
Yes. The transformer features a NEMA 3R enclosure and Weathershield indoor-outdoor capability, designed for reliable operation in outdoor or partially protected spaces. This makes it suitable for outdoor control panels, weather-exposed utility cabinets, and industrial installations where humidity or exposure is a consideration.
The S34N12S51 is UL Listed, ensuring safety compliance for electrical products. The NEMA 3R enclosure further supports certification-related expectations for indoor-outdoor use. These certifications help streamline procurement, QA reviews, and compliance documentation across industrial projects.
With a compact 16 lb form factor, aluminum winding, and robust enclosure, the S34N12S51 minimizes installation time and service weight, reducing labor costs. The 0.5 kVA rating satisfies common control-panel loads, while durability and UL/NEMA-rated specs lower lifecycle maintenance risks and unplanned downtime, contributing to predictable total cost of ownership.