Eaton KT3400T Eaton Series C e...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1,342.01
$1,240.33
B-Line KT3400T Eaton Series C electronic molded case circuit breaker trip unit

Eaton KT3400T Eaton Series C electronic molded case circuit breaker trip unit

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Model: KT3400T
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$1,342.01
$1,240.33
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Eaton Series C electronic molded case circuit breaker trip unit

KT3400T - spec sheet

Manufacturer Resources

Spec Sheet

Product Specs

Amperage Rating:
400A
Frame Size:
K-frame
Number Of Poles:
Three-pole
Series:
Series C
Trip Type:
Thermal magnetic
Department:
Electrical
Product Length:
6.9 IN
Product Height:
5.4 IN
Product Weight:
1.95 LB
Product Width:
4.2 IN
Product Group:
Circuit Protection
Product Subgroup:
Circuit Breakers
Product Type:
Trip Unit

Eaton KT3400T – Frequently Asked Questions

1) What amperage and frame does the Eaton KT3400T trip unit cover?
The KT3400T is a 400 amp, three-pole trip unit for Eaton Series C K-frame molded case breakers. The frame designation matters more than the amp rating when you order: a K-frame trip unit will not mount in a J-frame or L-frame breaker, so confirm the host breaker is a Series C K-frame before buying.
2) Is the KT3400T a thermal magnetic or an electronic trip unit?
The trip type on the KT3400T is thermal magnetic. That means overload protection comes from a bimetal element and short circuit protection from a magnetic element, rather than from a solid-state sensing board. If your spec calls for adjustable electronic trip functions, a thermal magnetic unit is not a substitute for that requirement.
3) Will a 400A K-frame trip unit work on a 250A or 600A Eaton breaker?
No. The KT3400T is fixed at a 400A rating, so it is not a way to change a 250A K-frame to a different rating or to serve a 600A L-frame. You need the trip unit matched to the rating you want and to the frame already in the panel, and a K-frame unit only fits K-frame breakers.
4) How big and how heavy is the KT3400T trip unit for panel space planning?
The KT3400T measures 6.9 x 5.4 x 4.2 inches (length, height, width) and weighs 1.95 lb. Useful numbers if you are checking gutter clearance in an existing enclosure or shipping a spare to a remote site as part of an MRO stock.
5) What part number do I give my electrical distributor for a 400A Eaton K-frame trip unit?
Order by Eaton manufacturer part number KT3400T. It is sold as a single model with no finish or option variations to specify, so the part number alone identifies the 400A three-pole K-frame Series C trip unit.
6) Can I use the KT3400T to re-rate an existing Eaton K-frame breaker instead of replacing the whole breaker?
A trip unit like the KT3400T is the interchangeable rating element of a Series C K-frame breaker, so swapping it is how the frame gets its 400A three-pole rating rather than buying a complete breaker. Eaton's spec sheet for the KT3400T lists the breaker frames and ratings it applies to, and that document should be the final check before you order against a specific installed breaker.
How fast can I get the Eaton KT3400T delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Eaton KT3400T come with a warranty?
Absolutely. The Eaton KT3400T is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Eaton KT3400T?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Eaton KT3400T from ZenSupply?
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