Eaton / Cutler-Hammer KS320350D Molded Case Circuit Breaker
- 350A
- 3 Pole
- Unit Mount
Quantity
Eaton / Cutler-Hammer KS320350D - 350A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
Built for industrial applications, the KS320350D delivers 350 amps of reliable power distribution and circuit protection. This 3-pole K-frame device utilizes a fixed thermal and adjustable magnetic trip unit to safeguard against overloads and short circuits. It is engineered to fit Eaton Series C panelboards and motor control centers. With a high interrupting capacity of 65 kAIC at 240VAC, this unit mount MCCB is an excellent choice for upgrading commercial electrical infrastructure.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Series | KS |
| Amperage | 350A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC |
| Frame Type | KS |
|---|---|
| Terminal Type | Lugs |
| For Use With | Eaton Series C Panelboards, Switchboards, Motor Control Centers |
| Wire Gauge | 250-500 kcmil |
| 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 | Line and Load Lugs Included |
| Standards | CSA C22.2 No. 5, NEMA AB 1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Non-Interchangeable Trip |
Product FAQs
5 answersWhat does the "D" suffix mean in the KS320350D catalog number?
In this catalog number, the "D" suffix indicates that the circuit breaker is supplied with both line and load lugs included from the factory.
What is the magnetic trip adjustment range for this 350A breaker?
The adjustable magnetic trip function can be set between 5 and 10 times the continuous current rating. For this 350A breaker, that provides an instantaneous trip range of 1750A to 3500A.
What do the "LI" trip functions on the KS320350D stand for?
The "LI" designation indicates that the thermal-magnetic trip unit provides Long-Time (thermal) and Instantaneous (magnetic) protection. The long-time function protects against overloads, while the instantaneous function clears short circuits.
What is the difference between the Eaton KS and KD circuit breaker frames?
The KS frame is a legacy Series C design that has been officially superseded by the KD frame. Sourcing the exact KS320350D replacement allows facilities to maintain their original system certifications without the need to retrofit the panel.
Which trip unit is utilized in the KS320350D?
This complete breaker includes a factory-installed 350A thermal-magnetic trip unit, which corresponds to the KT3350T trip unit used across Series C K-frame breakers.
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.