ROCKWELLMotor protection circuit breaker

140G-KC0F3-D40

Name: 140G-KC0F3-D40
Brand: ROCKWELL
SKU: 140G-KC0F3-D40

The Allen-Bradley 140G-KC0F3-D40 is a 400A, 3-pole molded case circuit breaker with adjustable thermal and magnetic trip units, ideal for industrial control panels and motor protection.

Product Model140G-KC0F3-D40

Product ID108262

Stock on Request

Last updated: 8/29/2026

Quantity

Key Features

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1. High Interrupting CapacityThe Allen-Bradley 140G-KC0F3-D40 boasts an impressive interrupting capacity of 65kA at 600V AC, ensuring it can handle high short-circuit currents effectively.
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2. Adjustable Trip UnitsEquipped with adjustable thermal and magnetic trip units, this circuit breaker provides customizable protection settings to match your specific application needs.
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3. Reliable ProtectionDesigned for industrial applications, the 140G-KC0F3-D40 offers robust protection against overloads, short circuits, and ground faults, ensuring the safety of your electrical system.
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4. Versatile Mounting OptionsAlthough not suitable for DIN rail mounting, the circuit breaker’s front-side screw connections provide flexibility in installation, making it easy to integrate into various electrical systems.

Technical Specifications

Detailed engineering parameters based on manufacturer documentation

Specifications may be subject to change without notice

Parameter

Value

Parameter

Value

Number of poles

With integrated under voltage release

False

Rated short-circuit breaking capacity lcu at 400 V, 50 Hz

120 kA

Integrated earth fault protection

False

Complete device with protection unit

True

Rated permanent current Iu

400 A

5. Durable ConstructionBuilt with a durable construction and rated for 75°C wire temperature, the 140G-KC0F3-D40 can withstand harsh industrial environments and maintain its performance over time.

Type of control element

Toggle

Rated impulse withstand voltage (Uimp)

8 kV

Frame size

400 A

Thermal trip current (Ir)

280 A

Magnetic trip current (Im)

2000 A

Electrical life cycle

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

Intermediate point (Irms)

30 kA @ rated current up to 400 A, rated voltage 480V AC

Threshold current (Irms)

10 ka @ rated current up to 400 A, rated voltage 600V AC

Interrupting rating (Irms)

65 kA @ rated current up to 400 A, rated voltage 480V AC

Intermediate point (Ip)

35 kA @ rated current up to 400 A, rated voltage 480V AC

Interrupting rating (Ip)

43.9 @ rated current up to 400 A, rated voltage 480V AC

Threshold current (Ip)

21 kA @ rated current up to 400 A, rated voltage 600V AC

Threshold current (I2t)

1.5x103 @ rated current up to 400 A, rated voltage 600V AC

Intermediate point (I2t)

2.4x103 @ rated current up to 400 A, rated voltage 480V AC

Interrupting rating (I2t)

2.8x103 @ rated current up to 400 A, rated voltage 600V AC

Rated service short-circuit breaking capacity (Ics(% Icu)) per IEC 60947-2 rating

100% @ 690V AC, 50/60 Hz

Interrupting rating per UL 489/CSA C22.2, No. 5

65kA @ 600V, 50/60 Hz

Rated ultimate short-circuit breaking capacity (Icu) per IEC 60947-2 rating

85kA @ 500V AC, 50/60 Hz

Protection type

T/M-adjustable thermal/adjustable magnetic TMA

Motor drive integrated

False

With switched-off indicator

False

Motor drive optional

True

Position of connection for main current circuit

Front side

Type of electrical connection of main circuit

Screw connection

Insulation voltage

Rated 1000V per IEC

Suitable for DIN rail (top hat rail) mounting

False

DIN rail (top hat rail) mounting optional

True

Degree of protection (IP)

IP40

Weight

0.999

Mechanical life operations

240 /h

Factory option

None

Height

205 mm

Device construction

Built-in device fixed built-in technique

Width

140 mm

Depth

108.5 mm

Storage temperature

-40 Â°F

Wire temperature rating

Al or Cu 75 Â°C

Operational voltage (Ue)

90% @ 3000 metre (9840 ft) altitude

Rated uninterrupted current (Iu)

98% @ 3000 metre (9840 ft) altitude

Ambient temperature without derating

104 Â°F

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