CM-MPS.21S ABB Compact Motor Protection Switch Integrated Overload Short-Circuit Protection Industrial Control Panels
The ABB CM-MPS.21S is a compact, multifunctional motor protection switch designed to provide reliable thermal overload and short-circuit protection for three-phase motors up to 3 kW. As part of ABB’s CM-MPS series, the CM-MPS.21S integrates switching, isolation, and motor protection in a single DIN-rail mountable device, eliminating the need for separate contactors and thermal relays. This model CM-MPS.21S features adjustable current settings (0.1–1.6 A), manual ON/OFF control, clear trip indication, and compliance with IEC/EN 60947 standards, making it ideal for use in HVAC systems, pumps, compressors, and small industrial machinery. With its space-saving design and tool-free installation, the CM-MPS.21S simplifies panel wiring while enhancing operational safety and maintenance efficiency.
Product Specifications: ABB CM-MPS.21S
| Manufacturer |
ABB |
| Product Type |
Motor Protection Switch (MPS) |
| Model Number |
CM-MPS.21S |
| Pole Configuration |
3-pole |
| Rated Operational Voltage (Ue) |
Up to 415 V AC |
| Adjustable Current Range |
0.1 – 1.6 A |
| Motor Power (at 400 V, 3-phase) |
Up to 0.75 kW |
Product Images

Related Products
| CM-MPS.21S |
CM-MPS.52S |
| CM-MPS.22S |
CM-MPS.53S |
| CM-MPS.23S |
CM-MPS.61S |
| CM-MPS.31S |
CM-MPS.62S |
| CM-MPS.32S |
CM-MPS.63S |
| CM-MPS.33S |
CM-MPS.71S |
| CM-MPS.41S |
CM-MPS.72S |
| CM-MPS.42S |
CM-MPS.73S |
| CM-MPS.43S |
CM-MPS.81S |
| CM-MPS.51S |
CM-MPS.82S |