Allen‑Bradley 140MT‑C‑KRY Lockable Operating Knob

Product Specification

Allen Bradley 140MT-C-KRY Lockable Operating Knob

About Us

SWAN Electric is a supplier of industrial automation spare parts located in China.We specialize in PLC modules,Analog I/O

module,power supply,HMI touchscreen panel, discontinued spare part,cable CPU processor, Servo-drive,Inverter,Base terminal unit,Communication

Module,Switch Module,control board. At the same time, we have established close cooperative relationships with multiple PLC and DCS product

maintenance service providers.

Advantage

High performance: Allen Bradley modules are designed with advanced technology and design to ensure high performance and stability.

Reliability: Allen Bradley modules are rigorously tested and certified for outstanding reliability and durability.

Flexibility: A variety of types and specifications of modules are available, which can be selected and configured according to actual needs.

Easy maintenance: Powered Plug-in (RIUP) function is provided for easy maintenance and replacement of modules.

Security: CIP safety bridging and routing functions are supported, providing solutions with functional safety up to SIL 3.

Key Features

Technical Specifications

140MT Motor Circuit Protector System Overview

The 140MT-C-KRY is part of the Bulletin 140MT motor circuit protector family, which provides magnetic short-circuit protection rated up to 40A . These protectors are designed for integration into three-component motor starters when combined with contactors and overload relays . Key system benefits include:

• Tap Conductor Ratings: Allow smaller conductors in group motor installations, reducing material costs 

• Coordinated Protection: Tested with contactors and overload relays to provide high short-circuit protection 

• Compact Design: Fits within standard motor control panel layouts

Applications

The 140MT-C-KRY is suited for industrial motor control environments requiring safe and lockable isolation:

• Motor Control Centers (MCCs): Provides lockable disconnection for motor feeder circuits

• Industrial Machinery: Enables safe lockout/tagout (LOTO) compliance during maintenance

• Panel Building: Serves as a control interface for motor circuit protectors

• Process Industries: Used in chemical, food and beverage, and manufacturing plants where safe isolation is required

• Group Motor Installations: Supports tap conductor ratings for cost-effective multi-motor setups 

Key Benefits

Important Notes

• Locking Feature: The knob can be locked only in the OFF position using one padlock with a 4 to 6 mm shackle 

• Compatibility: This accessory is designed for 140MT motor circuit protectors and 140UT circuit breakers; verify your device model before ordering 

• Color Variant: A black version (140MT-C-KN) is also available for applications where red/yellow is not preferred 

• Country of Origin: Reported as either Switzerland (CH)  or Germany (DE)  depending on production batch

• Accessory Classification: This is a mechanical locking accessory, not an electronic component 

FAQ

Q1: What devices is the 140MT-C-KRY compatible with?

A: The 140MT-C-KRY is designed for use with 140MT motor circuit protectors (rated up to 40A) and 140UT circuit breakers .

Q2: Can the 140MT-C-KRY be locked?

A: Yes, it is a padlockable operating knob. It can accommodate one padlock with a shackle size of 4 to 6 mm and can be locked in the OFF position .

Q3: What is the purpose of the red and yellow color?

A: The red and yellow color scheme provides high visual contrast, making the operating state of the motor circuit protector clearly identifiable and enhancing workplace safety.

Q4: What is the difference between 140MT-C-KRY and 140MT-C-KN?

A: Both are lockable operating knobs. The key difference is the color: 140MT-C-KRY is red/yellow, while 140MT-C-KN is black .

Q5: Is the 140MT-C-KRY used with 140MP circuit breakers?

A: The available information specifically states compatibility with 140MT motor circuit protectors and 140UT circuit breakers. Verify compatibility with 140MP devices through Rockwell Automation documentation.

Q6: Where is the 140MT-C-KRY manufactured?

A: The country of origin is reported as either Switzerland  or Germany , depending on the production batch.

Q7: Does the 140MT-C-KRY include the circuit breaker itself?

A: No. This is an accessory knob only. It is designed to replace or supplement the existing operating knob on a 140MT or 140UT device .

Q8: What is the weight of the 140MT-C-KRY?

A: The approximate weight is 8 grams including packaging .