Eaton C0300E3AFB Industrial Control Transformer - UL Listed
Part Number: C0300E3AFB
Quick Summary
Eaton Type MTE industrial control transformer provides reliable control power for automation panels. Designers and maintenance teams often wrestle with limited space, fuse coordination, and downtime when power supplies fail or wiring becomes complex. UL Listed, CSA Certified, and cUL Certified, with RoHS compliance, deliver safety, regulatory alignment, and traceability for modern control systems. Epoxy encapsulation and molded-in terminals simplify field wiring while boosting durability in harsh environments. A 300 VA rating with 208/277 V primary and 120 V secondary supports compact, efficient panel design and reduced maintenance in industrial automation scenarios.
Product Information
Extended Description
C0300E3AFB Eaton: Eaton Type MTE industrial control transformer, pv: 208/277v, taps: none, sv: 120v, 55°c, 300 va , cu magnet wire
Product Name
Eaton Type MTE industrial control transformer
Catalog Number
C0300E3AFB
UPC
786680550805
Product Length/Depth
4.56 in
Product Height
5.29 in
Product Width
4.5 in
Product Weight
11.5 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.
Compliances
RoHS Compliant
Certifications
UL Listed CSA Certified cUL Certified
Catalog Notes
Epoxy encapsulated, Laminations of high quality silicon steel to minimize core losses and optimize performance, 50/60Hz operation, 130°C insulation system standard, Molded-in terminals for maximum durability
Coil material
Copper windings
Design
MTE
Tap size
None
Primary voltage
208/277 V
Temperature rating
55°C
Volt ampere rating
300 VA
Secondary voltage
120 V
Modification 1
Factory-mounted two-pole primary fuse block for non-rejection type fuses
Special features
Primary fuse block
Eaton Specification Sheet - C0300E3AFB
Selling Policy 25-000 - Distribution and Control Products and Services
Feature: Primary voltage of 208/277 V and secondary voltage of 120 V enables direct integration with common industrial automation networks. Business Impact: Reduces the need for additional step-down solutions, simplifying panel design and lowering total installed cost. Application: Control relays, PLC inputs, and automation controllers in machine safety and process control. Feature: 300 VA power rating aligns with typical control circuit loads, delivering reliable performance without overdesign. Business Impact: Improves energy efficiency and minimizes heat generation in control enclosures, reducing cooling requirements. Application: Electrical cabinets, distribution panels, and remote I/O power supplies. Feature: Copper windings provide high efficiency and robust current handling. Business Impact: Lower temperature rise, extended service life, and better power quality for sensitive control devices. Application: Continuous-duty control circuits in manufacturing lines. Feature: Epoxy encapsulation offers moisture and vibration resistance. Business Impact: Enhanced durability in dirty or damp environments, reducing field failures and service costs. Application: Outdoor-rated or harsh-plant-floor panels. Feature: Molded-in terminals simplify installation and improve terminal durability. Business Impact: Faster wiring, fewer loose connections, and greater mechanical strength in busy control panels. Application: New equipment builds and retrofits where reliability matters. Feature: Factory-mounted two-pole primary fuse block provides built-in protection for non-rejection fuses. Business Impact: Improves safety, simplifies wiring, and minimizes sequence faults during startup. Application: Panel assemblies requiring compliant overcurrent protection.
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FAQs
When installing the C0300E3AFB, ensure the enclosure offers adequate clearance for its 4.56 in length by 5.29 in height and 4.5 in width. Use the molded-in terminals to simplify wiring and rely on the factory-mounted two-pole primary fuse block for overcurrent protection. Verify ambient temperature stays within the 55°C rating and ensure 50/60 Hz compatibility for consistent performance.
Yes. This transformer is designed for a 208/277 V primary and provides 120 V secondary outputs. With a 300 VA rating and copper windings, it supports control circuits and relays in automation panels. Its 50/60 Hz operation and epoxy encapsulation further ensure reliability across standard industrial power networks.
The C0300E3AFB is UL Listed, CSA Certified, and cUL Certified, with RoHS compliance. These certifications verify safety, performance, and regulatory compliance, which simplifies procurement for regulated industries, supports quality assurance audits, and helps meet electrical installation standards for panel builders and OEMs.
Typical applications include powering control panels, PLC input circuits, and relay coils in manufacturing and packaging lines. Its 300 VA rating is well-suited for medium-load control circuits, while the 208/277 to 120 V conversion integrates with standard low-voltage control needs, enabling reliable operation of automation equipment and safety interlocks.
The factory-mounted primary fuse block provides built-in protection, reducing wiring complexity and startup fault risk. This feature accelerates installation, lowers maintenance needs by preventing fuse-related damage, and improves uptime, contributing to a favorable return on investment through longer equipment life and fewer unplanned outages.