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ABB MO325-2.5 (1SAM160000R1007) Manual Motor Starter 

1. Key Parameters

• Product Model: MO325-2.5
• Order Code: 1SAM160000R1007
• Product Series: ABB Manual Motor Starters (MO Series, Low-Voltage Motor Control & Protection)
• Core Function: Manually starts/stops small AC motors; provides thermal overload protection (prevents motor overheating); delivers magnetic short-circuit protection; enables local motor control without external contactors; supports auxiliary signaling for remote status monitoring
• Electrical Specifications:

  Parameter	Details	Performance Metrics
  Motor Compatibility	- Voltage Rating: 230V AC (single-phase); 400V AC (three-phase) - Current Rating: 2.5A (full load, FL); 10A (locked rotor, LRA) - Power Rating: Up to 0.75kW (230V AC, 1-phase); Up to 2.5kW (400V AC, 3-phase)	Covers 80% of small industrial motors (pumps, fans, small conveyors)
  Protection Features	- Overload Protection: Thermal bimetal (trip class 10); Trip current: 1.05×FL (no trip); 1.2×FL (trip ≤2h); 6×FL (trip ≤5s) - Short-Circuit Protection: Magnetic coil; Trip current: ≥10×FL (≤0.1s response) - Phase Loss Protection: Optional (via auxiliary contact, for 3-phase motors)	Prevents 95% of motor failures caused by overheating or short circuits
  Control Function	- Manual Operation: Toggle lever (ON/OFF/TRIP reset); Mechanical interlock (prevents accidental restart after trip) - Auxiliary Contacts: 1× NO (normally open) + 1× NC (normally closed); Rating: 6A AC 250V (for signaling/alarm)	Enables remote status monitoring (e.g., motor running/tripped) via PLC/HMI
  Electrical Endurance	10,000 ON/OFF cycles (at rated current); 100 short-circuit trips (at 10×FL)	Ensures 5+ years of reliable operation in typical industrial cycles (10 cycles/day)
  Insulation Level	Class F (155℃); Dielectric strength: 2kVrms (1min, between live parts and ground)	Withstands high-temperature motor environments (e.g., 40℃ cabinet + 60℃ motor heat)

• Mechanical Specifications:
  • Housing Material: Flame-retardant thermoplastic (UL94 V-0); Impact resistance: IK08
  • Dimensions (W×H×D): 35mm × 85mm × 65mm (DIN rail-mountable; fits compact control panels)
  • Mounting: 35mm standard DIN rail (TS 35/7.5); Screw-mount optional (via adapter)
  • Weight: Approximately 120g
  • Terminals:
    - Power Input/Output: 6× screw terminals (16mm² max wire size, for motor/power connections)
    - Auxiliary Contacts: 4× screw terminals (2.5mm² max wire size, for signaling)
  • LED Indicators (Optional): Red (motor ON); Yellow (overload trip); Green (power present) [available on MO325-2.5/L version]
• Environmental Ratings:
  • Operating Temperature Range: -25℃~+60℃ (-13℉~140℉)
  • Storage Temperature Range: -40℃~+85℃ (-40℉~185℉)
  • Humidity Tolerance: ≤95% RH (non-condensing, 40℃; suitable for damp industrial areas)
  • Vibration Resistance: 10~500Hz, 1g acceleration (IEC 60068-2-6; No lever displacement or trip)
  • EMC Immunity: Complies with IEC 61000-4-2 (ESD: ±8kV contact); IEC 61000-4-4 (EFT: ±2kV) | Resists noise from nearby motors/VFDs |
• Compliance Standards: IEC 60947-2 (low-voltage switches), EN 60947-4-1 (motor starters), UL 508 (industrial control), CE, RoHS, CSA C22.2 No. 14 (Canadian safety)

2. Key Features

• Integrated Control & Protection: Combines manual ON/OFF control, thermal overload protection, and magnetic short-circuit protection in one device—eliminates the need for separate components (e.g., circuit breaker + contactor + overload relay), reducing panel wiring by 50% and cabinet space by 40%.
• Class 10 Overload Trip Curve: Thermal bimetal trip class 10 (trips ≤10s at 6×FL) matches the thermal characteristics of most small AC motors—prevents motor overheating from locked rotors (e.g., a jammed fan) while avoiding false trips from normal startup inrush currents.
• Mechanical Interlock & Trip Reset: Toggle lever locks in the "TRIP" position after an overload/short-circuit—requires manual reset to restart, preventing accidental motor activation after a fault (e.g., a jammed pump restarting automatically when unjammed) and enhancing operator safety.
• Dual Voltage/Phase Compatibility: Works with 230V AC single-phase (e.g., small fans) and 400V AC three-phase (e.g., compact conveyors) motors—eliminates the need for separate starters for different motor types, simplifying inventory and reducing costs.
• Auxiliary Contacts for Remote Monitoring: 1× NO + 1× NC auxiliary contacts enable remote status tracking (e.g., "motor running" via NO contact to PLC input, "overload tripped" via NC contact to HMI alarm)—provides visibility into motor status without opening the control panel.
• Compact 35mm DIN Rail Design: Slim form factor fits densely packed control panels—ideal for machines with multiple small motors (e.g., a packaging line with 5+ fans/pumps) and saves space compared to bulkier contactor-based systems.
• Global Safety Compliance: Meets IEC, UL, CSA, and CE standards—certified for use in 100+ countries (e.g., EU, North America, Asia), eliminating the need for regional-specific versions and simplifying international equipment deployment.

3. Application Fields

• Small Industrial Motors: Primary application—control/protection of low-power AC motors:
  • Manufacturing Workshops: Controls 0.75kW single-phase fans (230V AC) and 2.5kW three-phase small conveyors (400V AC) in assembly lines; overload protection prevents fan motor burnout from dust buildup, while auxiliary contacts send "conveyor running" status to the plant PLC.
  • Commercial HVAC Systems: Manually starts/stops 1kW single-phase air handlers (230V AC) and 2kW three-phase chilled water pumps (400V AC) in office buildings; short-circuit protection safeguards against wiring faults, while the trip interlock prevents accidental restart after a power surge.
• Water & Wastewater Equipment: Control of small pumps and mixers:
  • Residential Water Booster Pumps: Protects 0.5kW single-phase booster pumps (230V AC) from overheating due to low water levels (which cause dry running); the trip reset lever ensures operators address the low-water issue before restarting.
  • Wastewater Treatment Skids: Controls 2.5kW three-phase mixer motors (400V AC) in small aeration tanks; optional phase loss protection (via auxiliary contacts) alerts operators to a missing phase, preventing motor damage from single-phasing.
• Food & Beverage Machinery: Control of small processing motors:
  • Cafeteria Refrigeration Units: Starts/stops 0.37kW single-phase condenser fans (230V AC) in commercial fridges; compact design fits the fridge’s internal control panel, while flame-retardant housing complies with food safety facility fire codes.
  • Bakery Dough Mixers: Protects 1.5kW three-phase mixer motors (400V AC) from overload during heavy dough mixing; class 10 trip curve avoids false trips from mixer startup inrush, ensuring consistent dough preparation.
• Retail & Commercial Equipment: Motor control for small appliances:
  • Warehouse Conveyor Belts: Controls 2kW three-phase small conveyors (400V AC) for package sorting; auxiliary contacts connect to a warehouse HMI, showing "conveyor active" or "tripped" status to floor staff.
  • Laundry Facility Dryers: Manually starts 0.75kW single-phase dryer fan motors (230V AC); short-circuit protection safeguards against lint-induced wiring faults, while the -25℃~+60℃ temperature range withstands dryer heat.

4. Precautions

• Motor Rating Compatibility (Critical): Use only with motors ≤2.5kW (400V AC 3-phase) or ≤0.75kW (230V AC 1-phase)—overloading (e.g., a 3kW motor on MO325-2.5) causes the starter to trip continuously or fail to protect the motor, leading to burnout. Verify motor power/current against the starter’s ratings.
• Installation & Wiring:
  • Power Disconnection: Turn off plant power before wiring—live terminals carry 230V/400V AC, posing lethal shock risks. Use insulated tools and lockout/tagout procedures during installation.
  • Terminal Torque: Tighten power terminals to 2.5 N·m (for 16mm² wire) and auxiliary terminals to 0.8 N·m (for 2.5mm² wire)—under-tightening causes high contact resistance (overheating), while over-tightening damages terminal threads (loose connections over time).
• Protection Configuration:
  • Overload Trip Adjustment: Do not modify the thermal bimetal (factory-calibrated for 2.5A FL)—tampering (e.g., bending the bimetal) disables overload protection, leading to unprotected motor operation and potential fire risks.
  • Phase Loss Protection (3-Phase Motors): For 3-phase applications, connect the optional phase loss module (ABB accessory) to auxiliary contacts—without phase loss protection, a missing phase causes single-phasing (motor overheating), which the standard thermal protection may not detect in time.
• Operation & Maintenance:
  • Trip Reset Procedure: After a trip, first identify and resolve the fault (e.g., unjam a pump, fix a shorted wire) before resetting the lever—restarting without fault correction causes repeated tripping and accelerates starter wear.
  • Lever Operation: Use the lever’s full travel (ON → OFF → TRIP) for switching—partial lever movement (e.g., "half-ON") causes arcing at terminals, damaging contacts and reducing the starter’s electrical endurance.
• Environmental Limitations:
  • Temperature & Humidity: Do not operate above +60℃ or in condensing humidity—high temperatures (>60℃) degrade the thermal bimetal’s accuracy (false trips or no trips), while condensation causes terminal corrosion (intermittent connections). Install in ventilated panels away from heat sources (e.g., large motors).
  • Dust & Contamination: Keep the starter free of dust, oil, or metal shavings—contamination between terminals causes leakage current (false trips) or short circuits. Use dust-tight enclosures in manufacturing workshops with high particulate levels.
• Replacement & Lifespan:
  • End-of-Life Indicators: Replace the starter if: (1) it trips repeatedly without a fault, (2) terminals show signs of overheating (discoloration), or (3) the lever becomes stiff/unresponsive—these indicate worn contacts or damaged bimetal, reducing protection reliability.
  • Genuine ABB Accessories: Use only ABB-approved auxiliary modules (e.g., phase loss, LED indicators)—non-genuine accessories may have incompatible current ratings, causing auxiliary contact failure or starter damage

The structure and details of the product：

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