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Allen Bradley 140U MCB 140U-KTH3-D40

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140U-KTH3-D40

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The 140U-KTH3-D40, a molded case circuit breaker from Allen Bradley's 140U MCB series, operates effectively at a rated current of 400 Amps. It incorporates advanced electronic protection mechanisms, ensuring reliable performance in various industrial applications, with a three-pole design ideal for diverse connectivity needs.

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Rockwell Disclaimer: The product is used surplus. DO Supply is not an authorized surplus dealer or affiliate for the Manufacturer of this product. The product may have older date codes or be an older series than that available direct from the factory or authorized dealers. Because DO Supply is not an authorized distributor of this product, the Original Manufacturer's warranty does not apply. While many Allen-Bradley PLC products will have firmware already installed, DO Supply makes no representation as to whether a PLC product will or will not have firmware and, if it does have firmware, whether the firmware is the revision level that you need for your application. DO Supply also makes no representations as to your ability or right to download or otherwise obtain firmware for the product from Rockwell, its distributors, or any other source. DO Supply also makes no representations as to your right to install any such firmware on the product. DO Supply will not obtain or supply firmware on your behalf. It is your obligation to comply with the terms of any End-User License Agreement or similar document related to obtaining or installing firmware.

Technical specifications for 140U-KTH3-D40

ManufacturerAllen Bradley
Product TypeMolded Case Circuit Breaker
Product Line140U MCB
Part Number140U-KTH3-D40
Weight2.50 lbs (1.13 kg)
Rated Operational Current400 A
Protection TypeElectronic (LSI — Long, Short, High Instant)
Pole Type3 Poles
Internal Control Module1 Alarm Contact
Thermal Trip Adjustment Range200 to 400 A
Magnetic Trip Adjustment Range400 to 3200 A
Min. Operating Temperature-25°C
Max. Operating Temperature60°C
Min. Storage Temperature-40°C
Max. Storage Temperature80°C
Min. Relative Humidity5% (non-condensing)
Max. Relative Humidity95% (non-condensing)
Installation Altitude1000 m
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The Allen Bradley 140U-KTH3-D40 is a molded case circuit breaker tailored for robust electrical protection. This device is designed to handle a rated operational current of 400 Amps, making it suitable for high-demand applications. The circuit breaker is configured with three poles, enhancing its adaptability in multiple wiring scenarios.

In terms of safety features, the 140U-KTH3-D40 employs electronic (LSI) protection to effectively respond to long, short, and high instantaneous currents. The thermal trip settings allow for adjustments in the range of 200 to 400 Amps, allowing the user to customize the device to suit specific operational requirements. Additionally, the magnetic trip can be fine-tuned from 400 to 3200 Amps, accommodating various load conditions.

The environmental ratings of this circuit breaker are noteworthy. It can operate effectively in temperatures ranging from -25°C to 60°C and can withstand storage temperatures between -40°C and 80°C. The minimal relative humidity level for operation is 5% (non-condensing), while it can tolerate up to 95% relative humidity as a maximum.

For installation purposes, the device is suitable for altitudes up to 1000 meters. The internal control module includes one alarm contact, providing added functionality for monitoring circuit status. Overall, the 140U-KTH3-D40 circuit breaker is engineered for reliability and versatility in various industrial environments.