Eaton 5543PMURF LV Unipak capacitor bank - UL Listed
Part Number: 5543PMURF
Quick Summary
Eaton LV Unipak capacitor bank provides reliable reactive power support for three-phase power systems in commercial and industrial facilities. Engineers often struggle with voltage regulation, inefficient power factor, and downtime when retrofitting capacitor banks into existing panels. UL Listed and CSA Certified products, plus rugged NEMA 1/NEMA 3R enclosures and a durable powder-coated 14 gauge steel frame, help ensure safety, longevity, and regulatory compliance. This solution integrates with standard low voltage fixed capacitor bank designs to deliver measurable business value through improved power quality, reduced energy waste, and easier, code-ready installation in industrial environments.
Product Information
Extended Description
5543PMURF Eaton: Eaton LV Unipak capacitor bank, UNIPAK, Low Voltage Fixed Capacitor Banks, 66A, 480V, Three-phase, 55 kVAR, Protected, Neon red blown-fuse indicating lights, Three slottedblade-type fuses, B1 Frame
Product Name
Eaton LV Unipak capacitor bank
Catalog Number
5543PMURF
UPC
782116058822
Product Length/Depth
11.054 in
Product Height
25.3 in
Product Width
10.1 in
Product Weight
48 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 CSA Certified
Catalog Notes
Multiply the 240V kVAR rating by 0.75 to calculate the kVAR value at 208V.
Type
UNIPAK
Amperage Rating
66A
Fuse type
Three slottedblade type fuses with 200,000 ampere interrupting capacity
Phase
Three-phase
Product Category
Low Voltage Fixed Capacitor Banks
Voltage rating
480 V
Enclosure
NEMA 1, NEMA 3R
Enclosure material
14 gauge steel finished with durable powder coat finish
Frame size
B1
Indicators
Red, neon blown-fuse indicating lights are protected by transparent weatherproof guard
Protection
Three fuses, three lights
Rating
55 kVAR
Eaton Specification Sheet - 5543PMURF
Selling Policy 25-000 - Distribution and Control Products and Services
Feature: 66A amperage rating and 55 kVAR rating. Business Impact: Provides adequate reactive power for medium-load three-phase systems, reducing voltage drop and improving power factor. Application: Suitable for 480 V three-phase distribution in manufacturing and facilities with moderate motor loads and HVAC systems. The long-term benefit is lower energy costs and smoother motor operation. Keywords: low voltage fixed capacitor banks, three-phase PF correction, kVAR rating. Feature: Three slottedblade fuses with 200,000 AIC. Business Impact: Enhanced protection with high interrupting capacity, minimizing fault propagation and equipment wear. Application: Fits inside standard switchgear assemblies for reliable, code-compliant installations. Keywords: fuse type, AIC, protection. Feature: Red neon blown-fuse indicators under a weatherproof guard. Business Impact: Immediate fault visibility reduces maintenance time and unplanned downtime. Application: Field service scenarios requiring rapid fault diagnosis. Keywords: indicator lights, fault notification. Feature: Enclosure options: NEMA 1, NEMA 3R with 14 gauge steel powder-coated finish. Business Impact: Indoor and outdoor-ready durability, supporting long service life in harsh environments. Application: Outdoor transformer rooms, data centers, and factory floors. Keywords: NEMA 3R, outdoor-rated, powder coat. Feature: Frame size B1; compact footprint with 11.054 in length, 10.1 in width, 25.3 in height. Business Impact: Easier integration into existing panels and limited service space. Application: Retrofit projects and space-constrained installations. Keywords: B1 frame, panel compatibility. Feature: Warranty and certifications: UL Listed, CSA Certified, with Eaton’s standard warranty. Business Impact: Regulatory assurance and supported maintenance/backing for reliability. Application: Procurement and compliance-heavy projects. Keywords: UL Listed, CSA Certified, warranty. Feature: Catalog note: Multiply the 240V kVAR rating by 0.75 to calculate the kVAR value at 208V. Business Impact: Accurate planning for system voltage variations and design scaling to meet local codes. Application: Systems operating near 208 V ensure correctly sized banks. Keywords: kVAR adjustment, voltage scaling.
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FAQs
The 5543PMURF is a three-phase, 480 V fixed capacitor bank rated at 66 A and 55 kVAR, designed for low-voltage distribution. It uses a B1 frame and a rugged NEMA 1/NEMA 3R enclosure with a 14 gauge steel housing. Plan for panel space, wiring clearances, and safe fuse access; use the three slottedblade fuses with 200 kAIC rating for protection and ensure UL Listed/CSA Certified compliance.
The catalog notes indicate multiplying the 240 V kVAR rating by 0.75 to obtain the 208 V equivalent. For example, a 55 kVAR rating at 240 V yields about 41.25 kVAR at 208 V. This scaling helps sizing decisions for systems that operate near 208 V, ensuring proper power factor correction without overloading the bank.
Yes, the unit supports outdoor applicability through its enclosure options: NEMA 3R rated and a weather-protected design for indicator lights. The 14 gauge steel with durable powder coat finish provides corrosion resistance, while the UL Listed and CSA Certified status ensures compliance for both indoor and outdoor installations in appropriate climates.
This capacitor bank is UL Listed and CSA Certified, confirming adherence to key electrical safety standards. It incorporates three fuses with 200 kAIC interrupting capacity and red neon blown-fuse indicators under a protective guard, delivering clear fault signaling and safe maintenance access within a robust enclosure.
Eaton’s Selling Policy 25-000 provides a one-year warranty from installation or eighteen months from shipment, whichever occurs first. This coverage supports replacements or repairs for manufacturing defects and is complemented by Eaton’s documentation, datasheets, and the specification sheet to assist with installation and maintenance.