Eaton 75MCSR4313 LV AutoVAR 300 capacitor bank - NEMA 3R weatherproofing
Part Number: 75MCSR4313
Quick Summary
Eaton LV AutoVAR 300 capacitor bank is an automatic reactive power compensation solution for three-phase industrial power systems. It helps maintain a stable power factor and reduces energy costs at scale. This product carries CSA Certified, UL Listed, UL 508A, CSA Std. C22.2 No. 190, UL 810 and IEEE Std. 18 certifications, delivering proven safety and reliability. In plant environments from manufacturing floors to data centers, rugged enclosure design and wall-mount installation translate into space efficiency and predictable performance. With extended warranty terms and factory-supported service, it supports procurement goals, maintenance planning, and long-term total cost of ownership.
Product Information
Extended Description
75MCSR4313 Eaton: Eaton AUTOVAR 300, Automatic Capacitor Banks, 90A, 480V, Three-phase, 75 kVAR, Wall-mounted, 5 x 15, J Frame, Optional molded-case circuit breaker rated 65 kAIC at 480V and 600V, NEMA 3R weatherproofing.
Product Name
Eaton LV AutoVAR 300 capacitor bank
Catalog Number
75MCSR4313
UPC
786685198347
Product Length/Depth
14 in
Product Height
36 in
Product Width
36 in
Product Weight
210 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
CSA Certified UL Listed UL 508A CSA Std. C22.2 No. 190 UL 810 IEEE Std. 18
Catalog Notes
Other ratings available, please consult factory.
Type
AUTOVAR 300
Amperage Rating
90A
Mounting
Wall
Options
Optional molded-case circuit breaker rated 65 kAIC at 480V and 600V, NEMA 3R weatherproofing.
Phase
Three-phase
Product Category
Automatic Capacitor Banks
Voltage rating
480 V
Frame size
J
Rating
75 kVAR
Step X kVAR
5 x 15 kVAR
Feature → Business Impact → Application: The 90A, 75 kVAR rating with 5 x 15 kVAR steps enables precise reactive power control, delivering measurable improvements in power factor and reduced distribution losses across large loads. This translates to lower energy bills and smoother operation of motors and drives in manufacturing lines. Application: mid-to-large facilities seeking energy efficiency gains and compliance with power quality standards.Feature → Business Impact → Application: Wall mounting in a compact J frame (14 in depth, 36 in height and width) optimizes space in restricted electrical rooms, enabling easier retrofits alongside existing switchgear. Application: factory basements, equipment rooms, and retrofit projects where floor space is at a premium.Feature → Business Impact → Application: Optional molded-case circuit breaker rated 65 kAIC at 480V and 600V provides enhanced fault protection and seamless coordination with upstream protection schemes. Application: critical process lines requiring robust fault isolation and reliable restart after disturbances.Feature → Business Impact → Application: NEMA 3R weatherproofing expands installation options to exterior or semi-exposed environments, reducing enclosure needs and shielding from environmental contaminants. Application: outdoor rooftops, loading docks, and exterior electrical enclosures in harsh climates.Feature → Business Impact → Application: CSA/UL certifications and IEEE 18 compliance support regulatory alignment, simplifying audits and supplier qualification. Application: regulated industries such as manufacturing, data centers, and chemical processing where standards conformance matters for procurement and integration.Feature → Business Impact → Application: Built-in reliability with a long-term warranty (one year from installation or eighteen months from shipment) lowers lifecycle costs and supports predictable maintenance budgeting. Application: facilities planning and procurement programs seeking total cost of ownership clarity.
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FAQs
Installation should be performed by qualified electrical personnel following the product’s wiring diagram and applicable codes. Mount the unit wall-side in its J-frame enclosure, connect to the 480V three-phase bus, and coordinate with upstream protection. If using the optional MCCB, ensure proper setting for fault current and verify clearances, labeling, and enclosure grounding prior to energization.
Confirm a 480V three-phase system with adequate physical space, compatible enclosure rating, and protective coordination with upstream devices. The 75MCSR4313 supports 90A and 75 kVAR in five 15 kVAR steps, with optional 65 kAIC MCCB protection. Ensure bus configuration, grounding, and control wiring align with your facility’s protection strategy and maintenance practices.
Yes. The unit offers NEMA 3R weatherproofing as an optional feature, extending suitability to certain outdoor or semi-exposed installations. When installed outdoors, ensure appropriate enclosure protection, drainage, and ambient temperature considerations are observed to maintain performance and longevity.
The capacitor bank is CSA Certified and UL Listed, with UL 508A, CSA Std. C22.2 No. 190, UL 810, and IEEE Std. 18 certifications. These approvals verify electrical safety, control panel suitability, motor and drive compatibility, and power quality performance, simplifying customer audits, procurement vetting, and regulatory adherence.
ROI arises from improved power factor, reduced utility penalties, and lower system losses. With 75 kVAR rating and 480V three-phase operation, facilities typically realize energy savings and smoother motor startup. The combination of robust warranty and available MCCB protection also reduces lifecycle maintenance costs and downtime, supporting faster payback and predictable budgeting.