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ABB UA50-30-00RA 1SBL351024R80 3-Pole Contactor 

1. Key Parameters

• Product Model: UA50-30-00RA (Ordering Part Number: 1SBL351024R80)
• Product Series: ABB UA-Series 3-Pole AC Contactors (Medium-Power Load Switching)
• Core Function: Switches 3-phase AC power to medium-power loads (e.g., motors, heaters); provides advanced arc suppression during contact operation; enables remote control via low-voltage coil signals; integrates with overload relays for comprehensive motor protection; supports cyclic switching in industrial-duty scenarios
• Electrical & Switching Specifications:

  Parameter	Details	Performance Metrics
  Main Contacts (Power Circuit)	- Configuration: 3 Normally Open (NO) poles (3-phase) - Rated Operational Current (Ie): 50A (AC-3 duty, 400V); 80A (AC-1 duty, resistive loads) - Rated Making Current: 500A (peak, 400V) - Rated Breaking Current: 250A (rms, 400V) - Rated Voltage (Ue): 690V AC (max) - Duty Cycle: AC-3 (motor starting/running/stopping—120 starts/hour)	AC-3 duty rating suits heavy-duty motor applications; 50A capacity covers motors up to 22kW (400V), 37kW (690V), ideal for medium-scale industrial machinery
  Auxiliary Contacts (Control Circuit)	- Configuration: 0 Normally Open (NO) + 0 Normally Closed (NC) (expandable via add-on contact blocks: e.g., UA-CA5 series) - Rated Current (Auxiliary): 10A (AC-15, 230V); 6A (DC-13, 24V) - Voltage Rating (Auxiliary): 250V AC / 60V DC	Expandable auxiliary contacts enable custom control logic (e.g., interlocks, status feedback) without replacing the contactor, enhancing flexibility for diverse applications
  Coil Specifications	- Voltage Ratings (Selectable): 24V DC, 110V AC, 230V AC, 400V AC - Coil Power Consumption: 9VA (no-load); 50VA (pick-up) - Coil Resistance: 12Ω (24V DC); 1.1kΩ (230V AC) - Dielectric Strength: 3kV AC (coil to frame, 1 minute)	Wide voltage range supports global electrical systems; low no-load power consumption reduces standby energy waste in 24/7 operations (e.g., continuous-duty pumps)

• Mechanical & Environmental Specifications:

  Parameter	Details	Performance Metrics
  Mechanical Design	- Dimensions: 100mm (W) × 140mm (H) × 105mm (D) - Mounting Type: 35mm DIN rail (EN 50022) or panel mount (via adapter) - Housing Material: Flame-retardant thermoplastic (UL 94 V0) with glass-fiber reinforcement - Weight: Approximately 650g - Arc Suppression: Multi-chamber ceramic arc chutes (high-temperature resistance)	Glass-fiber reinforced housing enhances mechanical strength; ceramic arc chutes withstand high temperatures during arcing, extending contact lifespan to 1 million+ AC-3 operations
  Environmental Ratings	- Operating Temperature Range: -30℃~+70℃ (-22℉~158℉) - Storage Temperature Range: -40℃~+85℃ (-40℉~185℉) - Humidity Tolerance: 5%~95% RH (non-condensing, 40℃) - Vibration Resistance: 10~500Hz, 1.5g acceleration (IEC 60068-2-6) - Shock Resistance: 35g (11ms half-sine, IEC 60068-2-27) - EMC Compliance: EN 61000-6-2 (immunity: Level 3)	Extreme temperature range (-30℃~+70℃) suits harsh industrial environments (e.g., foundries, cold storage); Level 3 EMC immunity resists interference from VFDs, motors, and power transients

• Compliance Standards: CE, UL 508, CSA C22.2 No.14, IEC 60947-4-1, RoHS, EN 61000-6-3 (emission: Class B) |

2. Core Features

• Heavy-Duty AC-3 Performance: 50A rated current at 400V (AC-3) and 120 starts/hour—specifically engineered for medium-power motor control (up to 22kW), handling frequent starts/stops in demanding applications (e.g., 15kW compressors, 22kW water pumps) without contact degradation.
• Advanced Arc Suppression: Multi-chamber ceramic arc chutes—withstand high temperatures (up to 800℃) during contact opening/closing, rapidly extinguishing arcs to reduce contact erosion and extend service life to 1 million+ AC-3 operations, lowering maintenance frequency.
• Expandable Auxiliary Contacts: Supports add-on contact blocks (e.g., UA-CA5-10, UA-CA5-01) for 1NO/1NC or 2NO/2NC configurations—adapts to custom control logic (e.g., emergency stop interlocks, "motor running" LEDs) without replacing the entire contactor, reducing system cost.
• Global Voltage Compatibility: Coil options for 24V DC to 400V AC—suits diverse electrical systems (e.g., 400V AC in European factories, 230V AC in commercial buildings, 24V DC in industrial control cabinets), simplifying global inventory management.
• Rugged Reinforced Housing: UL 94 V0 thermoplastic with glass-fiber reinforcement—resists mechanical stress from vibration, wiring torque, and harsh handling; -30℃~+70℃ operating range ensures reliability in extreme environments (e.g., arctic pipelines, desert power plants).
• Low Energy Consumption: 9VA no-load coil power—minimizes standby energy waste in systems where contactors remain energized for extended periods (e.g., continuous-duty ventilation fans), reducing operational costs by 15%~20% vs. standard contactors.
• Seamless Protection Integration: Compatible with ABB TA/TMAX overload relays (e.g., TA42DU-50)—forms a complete motor protection system (overcurrent, overload, phase loss) that meets IEC 60947-4-1 safety standards, ensuring motor reliability and operator safety.

3. Application Fields

• Industrial Manufacturing: Medium-power machinery control:
  • Compressor Systems: Controls 15kW~22kW 3-phase rotary screw compressors—high making current (500A) tolerates startup inrush; ceramic arc chutes withstand frequent switching during load-based compressor cycling.
  • Conveyor Lines: Switches power to 11kW~18.5kW 3-phase conveyor motors—vibration resistance (1.5g) prevents contact chatter in heavy-industry environments (e.g., steel mills, automotive plants); expandable auxiliaries integrate with line interlocks.
• Water & Wastewater Utilities: Pump and blower control:
  • Booster Pumps: Manages 18.5kW~22kW 3-phase water booster pumps—wide temperature range (-30℃~+70℃) suits outdoor pump stations; humidity tolerance (95% RH) withstands damp conditions without corrosion.
  • Aeration Blowers: Controls 15kW~18.5kW 3-phase blowers in wastewater treatment—EMC immunity resists interference from variable-speed drives; AC-3 duty handles continuous on/off cycling for aeration control.
• Energy & Power Generation: Auxiliary system control:
  • Power Plant Auxiliaries: Switches 22kW~37kW 3-phase fan motors (boiler draft fans)—690V AC rating fits high-voltage industrial grids; ceramic arc chutes ensure reliability in high-temperature plant environments.
  • Solar PV Inverters: Connects 3-phase output from medium-scale inverters (up to 37kW) to the grid—EMC compliance avoids interference with inverter electronics; low no-load power reduces standby energy loss.
• Commercial & Institutional Facilities: Large-scale HVAC and heating:
  • Chiller Plants: Controls 18.5kW~22kW 3-phase chiller compressors—400V AC coil option fits commercial HVAC electrical systems; expandable auxiliaries trigger maintenance alerts for filter changes or refrigerant leaks.
  • Industrial Heaters: Switches 3-phase resistive heaters (up to 80A AC-1)—high AC-1 current rating suits heating applications (e.g., warehouse space heaters, process heating); flame-retardant housing meets fire safety standards.
• 
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