Eaton LW3700W Molded Case Circuit Breaker - UL Listed

Part Number: LW3700W
Manufacturer
Eaton
Part number
LW3700W

Quick Summary

The Eaton LW3700W molded case circuit breaker protects electrical panels by interrupting overcurrent in industrial power systems. Facilities face downtime from misconfigured protection settings and space-constrained installations, complicating maintenance and safety. UL Listed certification confirms safety compliance across global markets, while the Series C design supports interchangeability and fast replacement. This combination, plus the rugged frame and high interrupt rating, delivers reliable protection for critical electrical distribution. Engineers value the LW3700W for compatibility with L-frame configurations, absence of terminals enabling tailored terminations, and verified UL safety. Its robust rating supports 700 A continuous operation and safe switching in demanding industrial environments, helping reduce downtime. From manufacturing floors to utility-scale distribution panels, LW3700W provides reliable protection in both 690 VAC and 250 VDC networks. With Eaton's support documents and application notes, engineers can optimize wiring, select compatible accessories, and streamline maintenance planning.

Product Information

Extended Description

LW3700W Eaton: Eaton Series C complete molded case circuit breaker, L-frame, LW, Complete breaker, Interchangeable thermal-magnetic trip type, Three-pole, 700A, 690 Vac, 250 Vdc, 45 kAIC at 415 Vac, Without terminals, World
Product Name
Eaton Series C complete molded case circuit breaker
Catalog Number
LW3700W
UPC
786679027714
Product Length/Depth
18 in
Product Height
7 in
Product Width
8 in
Product Weight
35 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
Amperage Rating
700 A
Voltage rating
690 Vac, 250 Vdc
Trip Type
T207
Circuit breaker type
LW
Circuit breaker frame type
Complete breaker
Terminals
Without terminals
Frame
L
Class
World
Interrupt rating
45 kAIC at 415 Vac
Number of poles
Three-pole
Feature: The LW3700W provides a 700 A amperage rating, enabling protection of high‑current feeders and large motors without nuisance trips that disrupt production lines for critical power distribution. Business impact: This yields reduced downtime, lower maintenance expense, and extended equipment life by preserving steady process control under peak load conditions. Application: Ideal for motor feeders and large feeders in heavy manufacturing and process industries. Feature: Housing supports a voltage rating of 690 Vac and 250 Vdc, delivering versatile protection for mixed‑voltage DC and AC distributions in modern plants. Business impact: It simplifies design and stocking, lowers the number of devices required, and accelerates commissioning in multi‑voltage panels. Application: Suitable for AC/DC protection in mixed‑voltage panels across process and automation environments. Feature: The unit offers a 45 kAIC interrupt rating at 415 Vac, allowing rapid fault clearance and safeguarding downstream equipment from severe fault currents. Business impact: This capability improves safety margins, reduces potential equipment damage, and supports compliance with stringent short‑circuit considerations in critical facilities. Application: Essential in substations, data centers, and distribution panels with high fault currents. Feature: Three‑pole LW frame with T207 trip provides precise, selectivity‑driven protection and straightforward coordination with upstream breakers in three‑phase networks. Business impact: Users gain predictable protection curves, faster troubleshooting, and smoother integration with existing protection schemes during upgrades. Application: Three‑phase industrial installations requiring coordinated protection. Feature: Terminals are supplied separately (Without terminals), enabling tailored termination options and compatibility with a wide range of lugs, adapters, and accessories. Business impact: This flexibility reduces installation time, inventory complexity, and project risk when retrofitting legacy systems. Application: Retrofit projects and upgrades with varying terminal configurations. Feature: UL Listed certification confirms safety compliance and global acceptance, with Eaton documenting standardization in specification sheets for procurement. Business impact: The warranty (25-000) offers protection within one year from installation or 18 months from shipment, supporting total cost of ownership and service planning. Application: Global deployments where safety certification and service support are required.

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FAQs

LW3700W is specified as without terminals, which means you must select compatible lug or terminal accessories and mounting hardware before installation. Plan for field wiring terminations and ensure the chosen lugs align with the LW frame. Check Eaton’s accessory catalogs and application notes to verify the correct plug-in adapters or lug kits, and confirm panel cutouts and mounting clearances match the 18 in length, 7 in height, and 8 in width of the unit.
The LW3700W provides a 45 kAIC interrupt rating at 415 Vac, enabling rapid fault clearance and robust protection for downstream equipment. Its three-pole LW frame and T207 interchangeable thermal-magnetic trip support selective coordination with upstream devices, reducing unnecessary outages. Designers should review the Series C time-current curves in Eaton’s TD and MT catalogs to ensure proper selectivity with neighboring protective devices.
Yes. LW3700W is rated for 690 Vac and 250 Vdc, enabling protection across both AC and DC sections within mixed-voltage panels. This versatility simplifies design and stocking, lowers the number of devices required, and accelerates commissioning in facilities that utilize diverse voltage levels for drives, controls, and DC systems. Always verify that upstream protections are coordinated with the LW3700W trip characteristics.
LW3700W carries UL Listed certification, signifying conformity with recognized safety standards for electrical protection equipment. This certification supports global acceptance and regulatory compliance in many regions. For additional guidance, consult Eaton’s specification sheets and catalog PDFs which document standardization, warranty terms, and recommended applications to support procurement and installation decisions.
The LW3700W benefits from Eaton’s warranty policy, with coverage under the 25-000 term: one year from installation or 18 months from shipment, whichever occurs first. This reduces lifecycle risk and supports ROI by protecting against early failures in critical distribution paths. Regular inspection of trip units, terminal integrity when accessories are added, and adherence to Eaton’s application notes help maintain long-term performance.