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Allen Bradley Guardmaster Safety Relays 440T-MRKSE110E

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440T-MRKSE110E

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The Allen Bradley 440T-MRKSE110E is a single-key rotary interlock switch designed for safety applications. With a robust construction and a current rating of 20 amperes, it supports various system configurations and provides reliable switching functionality.

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Not an Authorized Distributor: DO Supply is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All of our products come with DO Supply's 2-year warranty.
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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 440T-MRKSE110E

ManufacturerAllen Bradley
Product TypeSingle-Key Rotary Interlock Switch
Product LineGuardmaster Safety Relays
Part Number440T-MRKSE110E
Weight0.69 lbs (0.31 kg)
UPC662073005834
Safety Contacts Configuration2 Normally Open (NO) contacts and 2 Normally Closed (NC) contacts
Current Rating20 Amperes
Mounting StyleEnclosure mount
Degree of ProtectionIP65
Auxiliary Contact Configuration1 Normally Closed (NC) contact
Applicable Wire Gauge8 to 2 American Wire Gauge (AWG)
Rated Insulation Voltage690 Volts AC
Rated Impulse Withstand Voltage6 kilovolts
Maximum Shear Force To Key15.1 kilonewtons
Maximum Torque To Key14 Newton-meter
Mechanical EnduranceUp to 100,000 operations
Rated Phase3-phase
Operating Temperature RangeFrom -10 to 50°C (From 14 to 122°F)
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The 440T-MRKSE110E from Allen Bradley is a single-key rotary interlock switch, primarily used in safety-interlock applications. Rated for a current capacity of 20 amperes, this device ensures efficient operation across various systems. It features a contact setup consisting of 2 Normally Open (NO) contacts and 2 Normally Closed (NC) contacts, which contributes to its versatility. An auxiliary NC contact is also included for enhanced functionality.

Designed for enclosure mounting, this switch meets an IP65 rating, making it ideal for situations that require protection against dust and water exposure. It accepts wire gauges ranging from 8 to 2 AWG, facilitating compatibility with different wiring setups. The switch is rated for insulation voltage up to 690 volts AC and has a significant impulse withstand capability of 6 kilovolts.

Mechanical robustness is a key feature, with a maximum shear force to key of 15.1 kilonewtons and the ability to endure up to 100,000 operations, highlighting its durability in demanding environments. This interlock switch operates efficiently within a temperature span of -10 to 50°C (14 to 122°F), making it suitable for varied operational conditions. The design supports three-phase applications, aligning with typical industrial requirements. Overall, the 440T-MRKSE110E provides reliable performance in crucial safety interlock situations.