140U-K3D3-D20
The 140U-K3D3-D20 molded case circuit breaker is an Allen-Bradley Bulletin 140U circuit breaker that has a Size K frame. It also has 3 poles and a thermal-magnetic type of trip unit, and it supports internal control modules that can be field-installed. The 140U-K3D3-D20 molded case circuit breaker provides an industrial system with fixed thermal circuit protection and adjustable magnetic circuit protection. This means that the magnetic trip rating can be changed, but the thermal trip rating cannot. The 140U-K3D3-D20 molded case circuit breaker operates at a current rating of 200 Amps.
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Technical specifications for 140U-K3D3-D20
| Brand | Allen-Bradley / Rockwell Automation |
|---|---|
| Series | 140U MCB |
| Part Number | 140U-K3D3-D20 |
| Description | UL Molded Case Circuit Breaker |
| Frame | K |
| Current Rating | 200 Amps |
| Interrupting Rating | 35 Kilo-Amps (KA) |
| Protection Type | Fixed Thermal/AdjustableMagnetic Trip Unit |
| Number of Poles | 3 |
| Rated Operating Voltage | 480 Volts AC |
| Type of Control | Toggle Lever |
| Terminals | End Cap Bolt-On |
| Operating Temperature | -8 to 60 Degrees Celsius |
The Allen-Bradley 140U-K3D3-D20 UL listed Molded Case Circuit Breaker is a device that is intended to provide short-circuit and thermal overload protection to industrial control panel and industrial applications. The 140U-K3D3-D20 Circuit Breaker belongs to the 400 Amps rated K-Frame circuit breaker family, and it is designed with a high interrupting rating that is 6 times higher than the interrupting rating of the conventional circuit breakers in its class. This circuit breaker has a very compact design that helps it to save panel space and operation costs, and it also serves as the main disconnect means for a control panel. The 140U-K3D3-D20 Circuit Breaker can be used in feeder circuit applications and also in heating, air conditioning, and refrigeration (HACR) applications.
The 140U-K3D3-D20 Circuit Breaker has a rated operating voltage of 480 Volts AC and a maximum trip current rating of 200 Amps. It has a maximum interrupting of 35 Kilo-Amps (at 480 Volts AC) and a rated impulse withstand of 6000 Volts. This circuit has a factory-rated mechanical lifespan of 100,000 operations and an electrical lifespan of 10,000 operations. The 140U-K3D3-D20 Circuit Breaker has a release unit made up of a fixed thermal and adjustable magnetic trip unit (electromechanical). This trip unit offers a fixed thermal trip rating of 200 Amps and an adjustable instantaneous trip setting between 1000 and 2000 Amps. The 140U-K3D3-D20 Circuit Breaker provides thermal overload protection by using a bimetallic heat element and it uses an electromagnetic device for instantaneous trip action. It comes with standard bolt-on screws (terminal lugs are sold separately), and it has a lever-type toggle handle for control (its positions are ON, OFF, or TRIP).
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The Allen-Bradley 140U-K3D3-D20 Circuit Breaker is a UL listed and 489 listed Molded Case Circuit Breaker with a K-Frame rating. It has a 35 kilo-Amps (KA) Interrupting Rating at 480 Volts AC and a Continuous Current Rating of 200 Amps.