D23MR40A - Cutler-Hammer Relay

D23MR40A - Cutler-Hammer Relay

The D23MR40A Type M Relay is a 4-pole industrial control relay designed for use in electrical control systems, machinery, motor control applications, and other equipment requiring a 120 VAC coil and 10-amp switching capacity. Manufactured by Cutler Hammer, this open-style relay features reversible contacts and is rated for 300V AC maximum, making it suitable for maintaining and servicing compatible control circuits where matching original specifications is important.

Relays such as the D23MR40A are commonly found in industrial control panels, manufacturing equipment, process control systems, and legacy electrical installations that continue to operate reliably in demanding environments. When you're replacing an existing relay, maintaining the correct pole configuration, coil voltage, and contact arrangement helps ensure the equipment functions as originally designed. Built for long-term service, the D23MR40A provides the form, fit, and functional characteristics needed for many existing control applications. This relay is also associated with catalog numbers D23MB, D26MPR, D26MPL, and D26MPS, which may appear on equipment labels, wiring diagrams, maintenance records, or parts lists.

Key Features and Benefits

• 4-pole Type M control relay
• Rated 10 amperes, up to 300V AC maximum
• 120 VAC, 60-cycle control coil
• Reversible contact design for compatible control applications
• Open-style enclosure configuration
• Suitable for industrial control panels and machinery controls
• Helps maintain original equipment specifications during relay replacement projects
• Compact design for installation in existing panel layouts
• Built to last in properly maintained electrical control systems
• Associated with catalog numbers D23MB, D26MPR, D26MPL, and D26MPS
  

Technical Specifications

• Part Number: D23MR40A
  
• Manufacturer: Cutler Hammer
  
• Type: M Relay
  
• Sub-Category: Relay
  
• Poles: 4
  
• Amperes: 10A
  
• Maximum Voltage Rating: 300V AC
  
• Coil Voltage: 120 VAC
  
• Frequency: 60 Hz
  
• Contact Style: Reversible Contacts
  
• Enclosure Type: Open
  
• Dimensions:
  • Height: 2.38 in.
  • Width: 3.50 in.
  • Depth: 3.68 in.

Material Compliance and Certifications

The D23MR40A should be installed and maintained by qualified personnel in accordance with applicable electrical codes, equipment manufacturer requirements, and facility maintenance standards. Users should verify compatibility with their specific application, including voltage, current, coil requirements, and control circuit configuration. Any certifications, listings, or compliance requirements should be confirmed based on the equipment in which the relay is being used.

Where It Works Best

The D23MR40A Type M Relay is commonly used in:

• Industrial control panels
• Motor control systems
• Manufacturing and production equipment
• Material handling systems
• Process control applications
• Machine control circuits
• Auxiliary control functions
• Legacy electrical equipment requiring a compatible Type M relay replacement
• Facilities maintaining existing control assemblies and automation systems

Its combination of a 4-pole configuration, 120 VAC coil, and reversible contacts makes it a practical choice for maintaining compatible control equipment while preserving the original operating characteristics of the system.