Eaton 125MCSR4313 Capacitor Bank - UL Listed
Part Number: 125MCSR4313
Quick Summary
Eaton 125MCSR4313 Capacitor Bank is a compact LV power factor correction unit for three-phase electrical systems. For engineers facing rising energy costs and poor power factor, this unit reduces losses and simplifies wiring. CSA Certified and UL Listed, with optional NEMA 3R weatherproofing, supports code-compliant outdoor or harsh indoor installations. Its modular design enables scalable VAR management and predictable maintenance, delivering measurable efficiency gains and compliance confidence across industrial facilities. Designed for wall mounting in 480 V three-phase networks, the AUTOVAR 300 delivers 125 kVAR in 5 x 25 kVAR steps, suitable for mid-size plants. With a 150 A rating and optional molded-case circuit breaker rated 65 kAIC, it balances safety with a compact footprint for retrofit and new builds.
Product Information
Extended Description
125MCSR4313 Eaton: Eaton AUTOVAR 300, Automatic Capacitor Banks, 150A, 480V, Three-phase, 125 kVAR, Wall-mounted, 5 x 25, 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
125MCSR4313
UPC
786685198361
Product Length/Depth
14 in
Product Height
36 in
Product Width
36 in
Product Weight
270 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
Catalog Notes
Other ratings available, please consult factory.
Type
AUTOVAR 300
Amperage Rating
150A
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
125 kVAR
Step X kVAR
5 x 25 kVAR
Eaton Specification Sheet - 125MCSR4313
Selling Policy 25-000 - Distribution and Control Products and Services
Feature: 150A amperage rating at 480V enables precise reactive power correction without oversized equipment. Business Impact: reduces energy losses and improves overall system efficiency. Application: ideal for manufacturing lines and HVAC systems with heavy motor loads. Feature: 125 kVAR total capacity with 5 x 25 kVAR steps. Business Impact: allows scalable VAR management and fine-tuning of power factor for changing process demands. Application: suitable for mid-size plants undergoing capacity expansion or load variation. Feature: Wall-mounted, J-frame enclosure and compact footprint. Business Impact: saves floor space and simplifies retrofit in crowded or existing plant spaces. Application: retrofit projects and new installations in tight mechanical rooms. Feature: Optional molded-case circuit breaker rated 65 kAIC at 480/600V. Business Impact: enhances short-circuit protection and safety coordination with existing equipment. Application: critical for facilities requiring stringent protection and fast isolation. Feature: NEMA 3R weatherproofing (optional). Business Impact: enables reliable outdoor or semi-exposed installations, reducing indoor cooling load. Application: substations, exterior equipment pads, and outdoor switchgear areas. Feature: Certifications CSA Certified and UL Listed. Business Impact: supports compliance with national and regional electrical codes, de-risking procurement. Application: regulated industries and facilities with supplier qualification requirements. Additional Notes: Catalog notes indicate other ratings are available, enabling tailored configurations to match site-specific voltage, protection, and coordination needs. This flexibility is valuable for long-term asset management and compatibility with existing Eaton Autovar families.
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FAQs
Yes. The 125MCSR4313 is designed as a wall-mounted, three-phase, 480V capacitor bank with 125 kVAR capacity and 150A rating, compatible with Eaton Autovar families and standard LV switchgear. Optional MCCB enables seamless protection coordination, while its NEMA 3R option supports outdoor or harsh indoor environments. Verify existing bus arrangement, space, and clearance during planning to ensure straightforward retrofit or new-install integration.
Key specs include 480V voltage, 150A amperage rating, and 125 kVAR total capacity, arranged as 5 x 25 kVAR steps in a three-phase bank. These allow precise reactive power correction to improve power factor, reduce losses, and lower demand charges. The unit supports a coordinating 65 kAIC MCCB option for enhanced protection and faster fault isolation.
Yes, with optional NEMA 3R weatherproofing. This makes the 125MCSR4313 suitable for outdoor installations such as exterior switchgear pads or outdoor plant areas, reducing indoor space requirements and enabling centralized power quality improvements in harsh environments.
The unit is CSA Certified and UL Listed, indicating compliance with recognized safety and performance standards. These certifications facilitate procurement in regulated industries, support code-compliant installations, and reduce supplier qualification risk for project teams evaluating power factor correction solutions.
ROIs are driven by improved power factor, reduced energy losses, and lower demand charges in motors- and HVAC-heavy facilities. The modular 5 x 25 kVAR design supports scalable maintenance, easier component replacement, and faster commissioning. Optional MCCB options and established Eaton support help maintain reliability and predictable lifecycle costs.