Eaton HKW3400 Series C molded case circuit breaker, K-frame, front view

Eaton HKW3400 MCCB, K-frame 400A, angled view

Images are for reference only. The revision received may differ slightly.

Eaton

HKW3400 Eaton Series C Molded Case Circuit Breaker, K-Frame, 400A, 600V

$4,536.00

SKU: HKW3400

In stock (25 available)

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✓ 30-day returns

Shipping

In-stock items ship within 48 hours, worldwide via DHL, FedEx or UPS.

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Returns

30-day returns on unopened parts in original packaging.

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Warranty

12-month warranty on every component. Tested before dispatch.

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Product Details

The Eaton HKW3400 is a Series C complete molded case circuit breaker in the K-frame, 400A three-pole, rated 600 Vac / 250 Vdc. It features adjustable thermal and adjustable magnetic trip units for precise overload and short-circuit protection, with a 70 kAIC interrupting rating at 415 Vac.

Key Features

400A, three-pole, 600 Vac / 250 Vdc
Adjustable thermal + adjustable magnetic trip
70 kAIC interrupting capacity @ 415 Vac
K-frame Series C — direct replacement for legacy Cutler-Hammer K-frame breakers

Specifications

Catalog Number	HKW3400
Product Type	Molded case circuit breaker
Series	Eaton Series C
Frame	K-frame
Rated Current	400 A
Rated Voltage	600 Vac / 250 Vdc
Poles	3
Trip Type	Adjustable thermal, adjustable magnetic
Interrupting Rating	70 kAIC @ 415 Vac
Certifications	IEC Rated
UPC	786679010389
Dimensions (D x H x W)	4.1 x 5.5 x 5.5 in
Weight	13.7 lb

Typical Applications

Feeder and branch circuit protection in commercial and industrial distribution panels, HVAC and pump panels, machinery disconnects, and retrofit upgrades of existing K-frame installations.

All parts supplied by Museum Technology are genuine Eaton products, sourced through authorized channels and inspected before dispatch. In-stock items ship within 48 hours with worldwide delivery, backed by a 12-month warranty. Contact us for volume pricing or for part numbers you cannot find listed.

Documentation

Datasheets, manuals and certificates are available for this part. Tell us which documents you need and we will send them with your quotation.

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Frequently Asked Questions

Is this part genuine?

Yes. Every component we sell is a genuine OEM part, inspected and tested before dispatch.

How fast will my order ship?

In-stock items ship within 48 hours of payment confirmation via DHL, FedEx or UPS, with tracking provided.

What warranty is included?

A 12-month warranty from the date of delivery, covering failures under normal operating conditions.

Can you source obsolete variants of this part?

Yes. Send us the full part number — a nameplate photo helps — and we will confirm availability and lead time.

What Happens Next

Place your orderor request a quote for volume and obsolete parts.
We verify & testyour part before it leaves our warehouse.
Tracked deliveryworldwide within 48 hours for stock items.

What We Check Before Shipping

✓ Part number and revision match your order
✓ Visual inspection: housing, terminals and labels
✓ Functional test on the bench where applicable
✓ Firmware / hardware revision verified for controllers
✓ Anti-static and shock-proof packaging

Buyer Information

Payment

Major credit cards, PayPal and bank transfer. Net terms available for approved business accounts.

Taxes & Duties

Calculated at checkout. DDP (duties paid) quotations available on request for international orders.

Bulk Pricing

Ordering 5+ units? Send your BOM via the quote form for tiered volume pricing.

About Us

We supply genuine industrial automation spare parts — circuit breakers, PLC, DCS and sensors — from 40+ manufacturers, backed by a 12-month warranty and worldwide delivery. Learn more about us →