Eaton S20P11S25CU Transformer - UL Listed

Part Number: S20P11S25CU
Manufacturer
Eaton
Part number
S20P11S25CU

Quick Summary

Eaton S20P11S25CU is a general-purpose encapsulated transformer for equipment rooms and control panels. Dealing with space constraints and weather exposure can slow projects, but this model’s rugged NEMA 3R enclosure, wall-mount capability, and indoor-outdoor suitability simplify field installs. UL Listed, combined with a tough 115°C insulation and copper windings, delivers regulatory compliance and long-term reliability. With a 25 kVA rating and versatile taps, it provides voltage flexibility for diverse loads. This makes it ideal for power distribution in industrial facilities, machine rooms, and harsh environments where uptime matters. The design also aligns with copper-windings-based efficiency and robust construction to support ongoing maintenance and operational savings.

Product Information

Extended Description

S20P11S25CU Eaton: General-Purpose Encapsulated Transformer, EP, Single-phase, PV: 240 X 480V, Taps: 1 at +5%, 2 at -5% X2 at +2.5%, 4 at -2.5%, SV: 120/240V, 115°C, 25 kVA, CU windings, Frame: 182, Indoor-Outdoor
Product Name
Eaton General purpose encapsulated transformer
Catalog Number
S20P11S25CU
UPC
786680247781
Product Length/Depth
13.8 in
Product Height
21.3 in
Product Width
16.47 in
Product Weight
407 lb
Compliances
Not Applicable
Certifications
UL Listed
Coil material
Copper
Design
EP
Enclosure
NEMA 3R
Frame
182
Insulation
180C
Mounting
Wall
Tap size
1 at +5%, 2 at -5% X 2 at +2.5%, 4 at -2.5%
Type
General-Purpose Encapsulated Transformer
Wiring connection
121A
Frequency rating
60 Hz
Kva Rating
25 kVA
kVA
25 kVA
Phase
Single-phase
Primary voltage
240 V, 480 V
Secondary Voltage
120/240 V
Sound Level
NEMA ST-20
Temperature rise
115 °C rise
Volt ampere rating
25 kVA
Weathershield
Indoor, outdoor
Feature → Business Impact → Application: Copper windings improve conductivity and reduce energy losses, lowering operating costs and improving load handling in sustained operation scenarios. This supports tightening utility bills and enhances system reliability for continuous production lines. Feature → NEMA 3R enclosure provides weather resistance and indoor-outdoor versatility, enabling flexible installation and safeguarding critical equipment in mixed environments, from indoor control panels to outdoor feeders. Application: Ideal for plants requiring dependable power for machines with variable duty cycles and exposure to humidity or dust. Feature → 25 kVA rating with 60 Hz operation and dual primary voltages (240/480 V) to secondary (120/240 V) offers voltage scalability and compatibility with multi-zone power distribution strategies; reduces the need for multiple transformers, cutting capital and maintenance costs. Application: Control panels, feeder circuits, and distributed loads in manufacturing and processing facilities. Feature → Tap settings at +5%, -5%, +2.5%, -2.5% allow fine-tuning of output under voltage fluctuations, stabilizing critical devices and protecting sensitive electronics. Application: Sensitive relay logic, PLC inputs, and automation sensors. Feature → Copper coil construction and a robust 182 frame enable durable performance with high short-term overload tolerance, ensuring reliability during startup surges. Application: Heavy machinery and motor-control centers. This transformer’s inline compatibility with Eaton’s accessories and standard mounting helps streamline installation and service.

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FAQs

For wall installation, mount the transformer on a stable surface using the 182 frame dimensions and follow standard clearances for ventilation. Ensure the enclosure remains NEMA 3R rated, connect the 240/480 V primary and 120/240 V secondary conductors to the appropriate terminations (121A wiring connection as specified), and verify taps are set to match your supply and load conditions.
Key specs include a 25 kVA rating, single-phase operation at 60 Hz, primary voltages of 240 V and 480 V, secondary voltages of 120/240 V, and copper windings. The unit supports taps at +5%, -5%, +2.5%, and -2.5% to fine-tune output. Expect a temperature rise around 115°C and a sound level aligned with NEMA ST-20.
Yes. The transformer uses a NEMA 3R enclosure rated for indoor-outdoor use, offering protection against moisture and dust. UL Listed certification further supports compliance in regulated facilities, while copper windings and a robust frame provide durability for continuous operation in factory floors, outdoor facilities, or semi-protected spaces.
The S20P11S25CU carries UL Listed certification, confirming safety and performance to recognized standards. It features a NEMA 3R enclosure for external protection, and insulation rated to 180°C with a 115°C rise specification. These factors support regulatory compliance, safer installations, and longer service life in demanding industrial settings.
Encapsulated construction minimizes moisture ingress and contaminants, reducing maintenance needs in harsh environments. Copper windings provide high conductivity and efficiency, lowering heat losses and energy costs. The robust enclosure and modular taps simplify service and future upgrades, helping shorten downtime and improve overall return on investment.