Overview
The Eaton Cutler-Hammer D23MR402 is a general-purpose Type M latched relay from the D23/D26 series, designed for dependable control circuit switching in industrial and commercial environments. This relay maintains its state without continuous power, making it ideal for applications requiring reduced power consumption and reliable logic switching in motor control, HVAC systems, automation sequences, and emergency shutdown circuits.
Key Features
- Latched Design: Maintains contact state after de-energization, minimizing continuous coil power draw
- Type M Construction: Reversible and convertible contact configuration for flexible circuit design
- Series A2 Rating: Proven reliability across industrial control applications
- 4-Pole Configuration: Simplifies complex logic switching and multi-circuit control
- Compact Form Factor: Drop-in compatible with standard control panel layouts
Technical Specifications
- Contact Configuration: 4 Pole, Type M
- Contact Rating: 10 A @ 300 VAC (typical for D23 series)
- Maximum Current: 50 A (relay holding)
- Coil Voltage: 120 VAC (standard; verify coil voltage on specific unit)
- Coil Frequency: 50–60 Hz
- Contact Type: Reversible (convertible between N.O. and N.C.)
- Series Designation: A2
- Mounting: DIN rail compatible control panel
- Operating Temperature: Standard industrial range (consult datasheet)
- Certifications: UL recognized, cUL approved
Typical Applications
- HVAC System Control: Fan, compressor, and damper switching
- Motor Control Circuits: Reversing, soft-start, and sequential motor control
- Automation & PLC Logic: Remote on/off switching and latching logic
- Emergency Shutdown & Safety Interlocks: Redundant safety logic circuits
- Lighting Control: Multi-circuit lighting switching in industrial facilities
- Refrigeration Units: Solenoid valve and compressor control
Compatibility & Replacements
Compatible With
- Standard 120 VAC industrial control voltages
- DIN rail and panel-mount control systems
- PLC discrete output modules (24 VDC trigger compatible with auxiliary relay)
- HVAC and motor control panels
- Automation systems requiring latching logic
Replaces / Drop-In Replacement For
- D23MB (base unit, same electrical specs)
- D23MD (with front deck accessory)
- D26MR variants (D26MPR, D26MPL, D26MPS) in compatible applications
- Other Eaton Type M relays of equivalent series and contact rating
Works With
- Industrial PLC platforms (Allen-Bradley, Siemens, Mitsubishi, Omron)
- 24 VDC auxiliary relays and interposing relays
- Standard DIN-rail control modules and terminal blocks
- Discrete I/O modules and safety relay networks
- No software integration required; hardwired logic control
