ROCKWELLMotor protection circuit breaker

140G-K6H3-D40-SD-AA

Name: 140G-K6H3-D40-SD-AA
Brand: ROCKWELL
SKU: 140G-K6H3-D40-SD-AA

The Allen Bradley 140G-K6H3-D40 circuit breaker is a high-performance, 400A, 3-pole molded case circuit breaker designed for industrial applications. It offers 65 kA at 480V and is ideal for demanding environments.

Product Model140G-K6H3-D40-SD-AA

Product ID105682

Stock on Request

Last updated: 8/29/2026

Quantity

Key Features

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1. High Current CapacityThe 140G-K6H3-D40 circuit breaker handles 400A, making it suitable for high-current applications in industrial settings.
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2. Reliability in Demanding EnvironmentsDesigned to withstand rigorous industrial conditions, this circuit breaker ensures long-term performance and minimal downtime.
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3. Advanced Protection FeaturesWith 65 kA at 480V, this breaker provides robust protection against electrical surges and faults, ensuring the safety of your equipment and personnel.
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4. Ease of InstallationThe 140G-K6H3-D40 is designed for easy installation, reducing setup time and minimizing the need for specialized tools.
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Technical Specifications

Detailed engineering parameters based on manufacturer documentation

Specifications may be subject to change without notice

Parameter

Value

Parameter

Value

Number of poles

Number of auxiliary contacts as change-over contact

With integrated under voltage release

Integrated earth fault protection

Complete device with protection unit

Yes

Rated permanent current Iu

400

5. Backward CompatibilityAllen Bradley products are known for their backward compatibility, ensuring that this circuit breaker can integrate seamlessly with older systems, extending its useful life and maximizing its value.

Type of control element

Toggle

Rated impulse withstand voltage (Uimp)

Frame size

400

Current range

80% MCCB

Voltage for reverse-fed circuit breaker, max

690V AC per IEC

Protection typeâElectronic I (instantaneous trip units)

I3 = 1...10 x In (600...4800 A)

Insulation voltage (Ui)

Rated 1000V per IEC

Electrical life cycle

7000 (400 A)/5000 (600 A) @ 415V AC

Protection typeâElectronic L (long time trip units)

I1 = 0.4...1 x In (160...400 A), t1 = 3, 6, 9, 18 s

Protection typeâElectronic S (short time trip units)

I2 = 1...10 x In (240...4000 A), t2 = 0.05, 0.1, 0.25, 0.5 s

Operating current (In), max

400A @ 60Â°C (140 ?F) per IEC

Interrupting rating

65kA @ 480V AC, 50/60 Hz per NEMA, UL, CSA

Rated ultimate short-circuit breaking capacity (Icu)

IEC 60947-2: 70kA @ 400...415V AC, 50/60 Hz

Rated service short-circuit breaking capacity (Ics)

IEC 60947-2: 100% Icu @ 750V DC, 3-poles in series, thermal-magnetic trip units only

Protection type

Electronic LSI-long and short time, high instantaneous

Motor drive integrated

With switched-off indicator

Motor drive optional

Yes

Position of connection for main current circuit

Front side

Type of electrical connection of main circuit

Screw connection

Suitable for DIN rail (top hat rail) mounting

DIN rail (top hat rail) mounting optional

Degree of protection (IP)

IP40

Weight

0.999

Mechanical life operations

20000

Vibration

2...13.2 Hz Â±1 mm, 13.2...100 Hz Â±0.7 G

Shock

Peak acceleration: 150 m/s2 peak, pulse duration 11 ms

Factory option

Shunt-trip, 110...127V AC @ 110...125V DC

Height

205

Device construction

Built-in device fixed built-in technique

Width

140

Depth

108.5

Storage temperature

-40

Wire temperature rating

Al or Cu 75Â°C

Operational voltage (Ue)

90% of voltage rating @ 3000 m (9840 ft) altitude

Rated uninterrupted current (Iu)

98% of current rating @ 3000 m (9840 ft) altitude

Ambient temperature without derating

104

Repairable

NOT_REPAIRABLE

Preferred Availability

false

Quick Turnaround

false

Dimension Height

0.0

Lead Time

Dimension Width

0.0

Dimension Length

0.0

Stock Status

NON_STOCKED

Weight Unit