Why Choose the ABB 1SAH100533R9900 Mini Contactor Relay?
The ABB 1SAH100533R9900, also designated MCRK040ATD, is a compact four-pole mini contactor relay designed for switching control signals and small loads in industrial machinery, automation equipment and building-control systems. Its space-efficient construction makes it well suited to control panels where dependable operation is required within a limited installation area.
This DC-operated contactor relay incorporates four normally open auxiliary contacts and screw terminals for straightforward panel wiring. The contact arrangement supports signal distribution, control sequencing and auxiliary-load switching across a broad range of low-voltage control applications.
The MCRK040ATD features a 24 V DC control coil with 2 W holding and pull-in consumption. It can switch AC-15 control loads up to 6 A at 240 V AC and is suitable for mounting on a DIN rail or directly onto a mounting surface.
Key Advantages
- Compact four-pole mini contactor relay for space-constrained panels.
- Four normally open contacts for flexible signal switching.
- 24 V DC control coil suits industrial automation systems.
- Standard screw terminals simplify wiring and maintenance.
- High mechanical durability supports long-term operation.
- Suitable for DIN-rail or wall mounting.
Key Features
- ABB MCRK mini contactor relay series.
- 4NO auxiliary-contact configuration.
- 24 V DC control voltage.
- Coil holding and pull-in consumption of 2 W.
- 6 A AC-15 rating at 240 V AC.
- Rated auxiliary-circuit voltage of 690 V AC and 440 V DC.
- Standard screw-terminal connections.
- IP20 terminal protection.
Reliable Control-Signal Switching for Automation Systems
A mini contactor relay uses an electromagnetic coil to change the state of its auxiliary contacts. Applying the rated 24 V DC control voltage energises the MCRK040ATD and closes its four normally open contacts, allowing multiple control signals or auxiliary loads to be switched simultaneously.
The four-contact arrangement supports signal distribution, control sequencing and electrical interlocking. Compact dimensions, screw terminals and flexible mounting make the relay suitable for densely populated control panels and machine-control assemblies.
Typical Applications
- Industrial machinery control circuits.
- Electrical-panel relay logic and sequencing.
- Automation and process-control systems.
- Building-control and HVAC equipment.
- Signal distribution and auxiliary-load switching.
- OEM machinery and compact control assemblies.
