Eaton S25N12S03 General-Purpose Transformer - UL Listed
Part Number: S25N12S03
Quick Summary
Eaton S25N12S03 General-Purpose Transformer delivers compact power conversion for control panels and industrial equipment. Space constraints and harsh environments often complicate transformer selection and wiring, making a rugged, compact solution essential. Key certifications include UL Listed safety approval and a NEMA 3R enclosure for indoor-outdoor service, plus 60 Hz single-phase operation. This unit supports 220 V to 120 V step-down in a 3 kVA rating, with aluminum windings for reliability, helping panel builders and machine designers meet performance and compliance goals while preserving efficiency and lifecycle value.
Product Information
Extended Description
S25N12S03 Eaton: Eaton General purpose encapsulated transformer, EP, aluminum, NEMA 3R, 176, 60 Hz, single-phase, 220 V, 120 V, NONE, 115 °C rise, 3 KVA, indoor-outdoor, 511AG
Product Name
Eaton General purpose encapsulated transformer
Catalog Number
S25N12S03
UPC
786680057458
Product Length/Depth
8 in
Product Height
14.25 in
Product Width
7.69 in
Product Weight
73 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
511AG
Frequency rating
60 Hz
Phase
Single-phase
Primary voltage
220 V
Secondary Voltage
120 V
Temperature rise
115 °C rise
Volt ampere rating
3 kVA
Weathershield
Indoor-Outdoor
Feature: 3 kVA, 60 Hz, single-phase, 220 V to 120 V. Business Impact: Enables efficient, reliable step-down power for control panels and equipment, reducing downtime and wiring complexity. Application: Ideal for factory automation panels and machine tool integrations. Feature: NEMA 3R enclosure with indoor-outdoor capability. Business Impact: Provides robust protection against dust, moisture, and incidental exposure, lowering enclosure upgrade needs and service calls. Application: Outdoor-rated power distribution zones and rugged manufacturing environments. Feature: Aluminum coil material. Business Impact: Balances conductivity with corrosion resistance and long-term durability, lowering maintenance costs. Application: Harsh-floor or coastal facilities where corrosion resistance matters. Feature: 176 frame, compact footprint (8 in L × 14.25 in H × 7.69 in W). Business Impact: Space-efficient design enables easier panel integration and allows more components in limited enclosures. Application: Tight-control panels and compact machine assemblies. Feature: 511AG wiring connection. Business Impact: Simplifies field wiring and enhances reliability through established terminal practices. Application: Ready-to-wire connections for streamlined installation and service. Feature: UL Listed certification and 60 Hz single-phase operation. Business Impact: Ensures safety compliance and compatibility with standard U.S. electrical standards, reducing risk. Application: Compliance-driven installations in industrial facilities and process lines.
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FAQs
Yes. S25N12S03 fits a 176 frame footprint and is designed for panel installations, featuring a compact 8 in L × 14.25 in H × 7.69 in W envelope. The enclosure is NEMA 3R rated for indoor-outdoor use, and the wiring connection is 511AG for reliable field terminations, simplifying mounting and wire routing.
The transformer provides a 220 V primary and 120 V secondary configuration with a 3 kVA (3,000 VA) rating at 60 Hz. It is single-phase, aluminum-wound, and designed for continuous operation in control panels and industrial equipment, offering stable voltage transformation for PLCs, relays, and low-voltage controllers.
Yes, the S25N12S03 is well-suited for control panels and PLC-based installations in manufacturing environments. Its 3 kVA rating supports typical automation loads, and the 220 to 120 V step-down is common for control circuitry. The NEMA 3R enclosure protects against weather elements, enabling use in semi-exposed industrial locations.
The transformer is UL Listed for safety. It features a NEMA 3R enclosure suitable for indoor-outdoor service, providing credible protection in varied environments. This combination supports regulatory compliance for many U.S. industrial facilities and aligns with standard power distribution practices in control panels.
Warranty is Eaton’s policy 25-000: one year from installation or eighteen months from shipment, whichever occurs first. Maintenance considerations include periodic inspection of connections, verification of insulation integrity, and monitoring for signs of moisture ingress or coil overheating. The aluminum windings and robust enclosure contribute to long service life and lower maintenance costs.