Overview
The Moeller Power Start Switch M25 is a compact motor control starter manufactured by Eaton Cutler-Hammer for direct-on-line (DOL) motor starting applications. The M25 series provides dependable power switching for three-phase AC motors in industrial, manufacturing, and automation settings. This unit simplifies motor control implementation and is suitable for replacement or system integration in existing electrical installations.
Key Features
- Direct-on-line (DOL) motor starting for three-phase applications
- Compact, rail-mountable design for integration into control panels
- Temperature-compensated overload protection for motor safety
- Short-circuit release mechanism to prevent damage during electrical faults
- Modular construction compatible with Eaton Moeller ecosystem
- Multiple voltage and frequency variants available (24 VDC, 230V 50Hz, 230V 60Hz configurations)
Technical Specifications
The Moeller Power Start Switch M25 comes in several configurations depending on supply voltage and frequency. Common specifications for M25 variants include:
- Current Rating: Up to 25 A (standard M25 frame size)
- Switching Power: Varies by configuration (typical range 5.5 kW – 11 kW)
- Supply Voltage Options: 24 VDC, 230 V AC 50 Hz, 230 V AC 60 Hz
- Phase: Three-phase (3P)
- Mounting: DIN rail / top-hat rail adapter compatible
- Operating Temperature Range: -25 °C to +50 °C
- Protection Features: Thermal overload, short-circuit release
- Control Wire: Max. 6 conductors up to 2.5 mm external diameter
Typical Applications
- Industrial pump and fan motor control
- Compressor startup and protection
- Manufacturing equipment motor switching
- HVAC and climate control systems
- Conveyor and material handling applications
- Machine tool automation and panel integration
Compatibility & Replacements
Compatible With
- Eaton Moeller control systems and panels
- DIN rail-mounted industrial control cabinets
- Three-phase AC motor circuits (230 V – 415 V range)
- Standard industrial electrical networks and switchgear
- Moeller MSFA and PKZ auxiliary modules (where applicable)
Replaces / Drop-In Replacement For
The M25 series is compatible with other Moeller/Eaton motor starters in the mid-current frame size range. Verify exact model compatibility with your system integrator or distributor before ordering, as specific replacement models depend on your supply voltage and control circuit configuration.
Works With
- Eaton Moeller overload relays and auxiliary blocks
- Standard three-phase AC power systems (50 Hz / 60 Hz)
- Control circuits operating at 24 VDC or line voltage
- DIN rail mounting systems and enclosure solutions
- Compatible with industrial control panel designs per IEC 60947 standards
