Eaton / Cutler-Hammer LM3500 Molded Case Circuit Breaker
- 500A
- 3 Pole
- Unit Mount
Quantity
Eaton / Cutler-Hammer LM3500 - 500A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Engineered for industrial power systems, the Eaton LM3500 delivers 500A of thermal-magnetic circuit protection. As a Series C L-Frame device, it offers reliable long-time and instantaneous (LI) trip functions for demanding environments. This 3-pole breaker is designed for unit mounting in Eaton PRL4 panelboards and legacy Westinghouse enclosures. It features a 14kAIC rating at 600VAC and includes load-side lugs. This specific unit has been superseded by the LD3500 series.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | LM3500-R |
| Series | LM |
| Amperage | 500A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 25kA @ 240VAC, 18kA @ 480VAC, 14kA @ 600VAC, 10kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Eaton Pow-R-Line 4 (PRL4) Panelboards, Westinghouse Switchboards |
| Wire Gauge | (2) 250-500 kcmil (Al/Cu) |
| Max Wire | 500 kcmil |
| Min Wire | 250 kcmil |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Adjustable Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | UL 489, NEMA AB-1, CSA |
| Approval | UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Interchangeable Trip Unit |
Product FAQs
6 answersWhat is the direct replacement for the legacy LM3500 circuit breaker?
The LM3500 is a legacy Westinghouse and Eaton Series C L-Frame device that has been superseded by the LD3500 series. The LD3500 serves as the modern equivalent for these 500A applications.
Which panelboards and enclosures accept the LM3500?
This unit-mount L-Frame breaker is engineered for installation in Eaton Pow-R-Line 4 (PRL4) panelboards and legacy Westinghouse switchboards.
Does the LM3500 use a standard 500A frame?
No, the LM3500 is built on a larger 800A Series C L-Frame but is equipped with a 500A trip unit. It requires L-Frame mounting hardware and physical space within the panelboard.
What are the wire size requirements for the LM3500 lugs?
The standard load-side lugs accommodate two conductors per phase, accepting either aluminum or copper wire sizes from 250 kcmil to 500 kcmil.
How does the trip unit operate on the LM3500?
It utilizes a thermal-magnetic trip unit (LI) that provides fixed thermal protection for long-time overloads and an adjustable magnetic dial to fine-tune the instantaneous short-circuit response.
Is the LM3500 rated for direct current (DC) systems?
Yes, in addition to standard AC voltages up to 600VAC, this breaker is rated for 250VDC applications with a 10kA interrupting capacity.
SuperClub
Join free. Get 500 SuperPoints.
Earn points on eligible purchases and redeem them at checkout.
100 SuperPoints = $1 off.
Warranties
Add an extra year of protection
60-Day Warranty
Your purchase includes 60 days of SuperBreakers warranty coverage.
Add a 1-year warranty extension in your cart.
Get a Quote
Don’t see what you’re looking for?
We source obsolete and hard-to-find parts every day.
Shipping
Free Shipping Policy
Parcel shipments with item value over $99 qualify for free economy shipping within the continental US. Please call to confirm special handling instructions. We do not charge a handling fee or require a minimum amount on any order. SuperBreakers does not ship on customer accounts.
Same Day Shipping
We strive to ship out your items the same day the order is placed. In rare circumstances SuperBreakers may reserve up to 5 business days to consolidate orders for complete shipment.
Expedited Shipments
Orders being shipped via Next Day Air, 2 Day Shipping or 3 Day Shipping must be received by 3 PM EST to guarantee same-day shipments. Expedited orders only ship on normal business days. Shipments will NOT be sent out on Saturdays and Sundays.
International Shipping
All International orders require a $1,000 minimum order threshold. Due to the special nature of these shipments, we require that these be placed with a SuperBreakers representative. Additional shipping and instructions will apply. All International Orders are Non-Cancel and Non-Refundable.