Why Choose the ABB MCRA040AR1 Mini Contactor Relay?
The ABB 1SAH102177R9900, type MCRA040AR1, is a compact four-pole mini contactor relay designed for control functions and the switching of small electrical loads in residential, commercial and industrial applications. Part of ABB’s MCRA..R range, it provides high switching performance in a space-saving format for electrical control panels and automation systems.
The MCRA040AR1 features four normally open contacts (4NO) and an AC-operated control circuit. Its special screw terminals are designed for connection with ring-tongue ferrules, providing a secure wiring solution for control and signalling circuits.
With a rated control circuit voltage of 24 V AC at 50/60 Hz, the MCRA040AR1 is designed for switching control signals and small loads up to 6 A at 240 V AC in AC-15 applications. The contactor relay is suitable for rail or wall mounting and supports additional front- or side-mounted auxiliary contact blocks when extra contacts are required.
Key Advantages
- Compact four-pole mini contactor relay for control applications.
- Four normally open (4NO) contacts for multiple switching functions.
- 24 V AC, 50/60 Hz control circuit for AC-operated systems.
- Suitable for switching control signals and small loads up to 6 A at 240 V AC (AC-15).
- Special screw terminals support secure connection with ring-tongue ferrules.
- Suitable for rail or wall mounting and expandable with additional auxiliary contacts.
Key Features
- ABB MCRA..R mini contactor relay range.
- MCRA040AR1 product type.
- Four-pole contactor relay.
- 4NO contact configuration.
- 24 V AC rated control circuit voltage at 50 Hz.
- 24 V AC rated control circuit voltage at 60 Hz.
- AC-operated control circuit.
- Designed for switching loads up to 6 A at 240 V AC (AC-15).
- Special screw terminals for ring-tongue ferrules.
- Supports up to six additional front- or side-mounted auxiliary contacts.
- Suitable for rail or wall mounting.
Compact Control Switching for Electrical Systems
Mini contactor relays such as the ABB MCRA040AR1 provide multiple electrically operated contacts for switching control signals and small electrical loads. The four normally open contacts allow several control circuits to change state simultaneously when the 24 V AC control circuit is energised.
The ABB MCRA..R range combines compact four-pole construction with ring-tongue terminal connections and flexible mounting options. Additional auxiliary contact blocks can be installed at the front or side, allowing the contact arrangement to be expanded by up to six additional contacts where required.
Typical Applications
- Industrial machinery control circuits.
- Automation and control panels.
- Residential building control systems.
- Commercial building electrical controls.
- Switching of control signals and small electrical loads.
- OEM machinery and compact electrical assemblies.
