Eaton S39N11S03X Encapsulated Transformer - 1PH 400-120/240
Part Number: S39N11S03X
Quick Summary
Eaton S39N11S03X is a general purpose encapsulated transformer for control panels and power distribution. In dense industrial assemblies, space limits and heat buildup challenge reliability; encapsulation helps protect windings and simplify wiring. Certifications are listed as Contact Manufacturer—verify CE, UL, and regional approvals with Eaton to ensure compliance. This 3 kVA, 1-phase unit supports compact control architectures and consistent voltage delivery across machines. With its rugged encapsulation and field-proven performance, it helps reduce downtime and maintenance costs in automation applications. Designed for use in machine controls, panel boards, and distributed motor starters, it aligns with common low-voltage architectures.
Product Information
Extended Description
S39N11S03X Eaton: Eaton General purpose encapsulated transformer, 3 KVA ENCAPS 1PH 400-120/240 115C RISE
Product Name
Eaton General purpose encapsulated transformer
Catalog Number
S39N11S03X
UPC
786680135835
Product Length/Depth
0.001 in
Product Height
0.001 in
Product Width
0.001 in
Product Weight
0.001 lb
Certifications
Contact Manufacturer
Type
Encapsulated transformer
Encapsulated construction provides superior protection for windings, insulation, and terminations in dusty, humid, or cramped control panels. The robust encapsulation reduces moisture ingress and contamination, extending service life and lowering maintenance costs in harsh industrial environments. This design is well suited for industrial automation applications where reliability and safety in machine mounts and distributed controls are critical. With a 3 kVA rating and 400 V primary feeding a 120/240 V secondary, it delivers stable, usable voltages for sensors, PLCs, relays, and small drives. The transformer supports common low-voltage distribution schemes and helps consolidate power for multiple automation loads within a single enclosure. Its one-phase construction simplifies wiring compared with three-phase alternatives in small applications. Thermal performance matters in space-constrained panels; the 115°C rise specification indicates the insulation system can tolerate higher operating temperatures without compromising safety or longevity. This translates to more reliable operation during peak loads and reduced risk of premature transformer failure in continuous duty scenarios. Compact footprint and encapsulated form factor ease installation and retrofits in existing panels. The unit's compact profile, combined with standard low-voltage wiring practices, minimizes enclosure depth and wiring complexity. Engineers benefit from faster commissioning, fewer field mistakes, and improved interchangeability with other Eaton components in a modular automation architecture. From a maintenance and lifecycle perspective, the S39N11S03X offers predictable performance and long service intervals. Encapsulation shields windings from dust and moisture, while the simple 1PH, 400-120/240 configuration minimizes fault modes. This translates to lower total cost of ownership and a more robust baseline for scalable automation projects.
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FAQs
For proper installation, ensure adequate clearance around the enclosure for heat dissipation and ventilation. Mount the unit in a compliant panel with secure, strain-relieved wiring to the 400 V primary and 120/240 V secondary. Verify correct phase connections and observe any manufacturer-specified torque values for terminals. Use protective covers where required to minimize accidental contact.
The device is a 3 kVA, 1-phase transformer with a 400 V primary and a 120/240 V secondary. This configuration supports low-voltage control circuits, PLCs, sensors, and relays within a compact footprint, enabling centralized power distribution in a single enclosure and reducing the need for multiple small transformers in automation cabinets.
This transformer excels in control panels, machine control cabinets, and distributed automation setups where a robust, single-phase step-down from 400 V to 120/240 V is required. Its encapsulated design suits environments with dust, moisture, or restricted space, providing dependable isolation and power quality for PLCs, relays, and small drives.
Certifications are listed as Contact Manufacturer for this model. To ensure regulatory compliance, consult Eaton for region-specific approvals such as CE or UL marks and applicable IP or insulation ratings. Request the latest datasheet and certificate documentation to verify conformity with local electrical codes before integration into your system.
Encapsulation reduces dust and moisture exposure, lowering maintenance frequency and extending service life in harsh environments. The 1PH 400-120/240 configuration simplifies wiring and reduces fault modes, contributing to faster commissioning and lower downtime. Over a typical automation project, this leads to a predictable lifecycle cost and improved return on investment through reliability and reduced field service needs.