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AEG 43506698 Industrial Grade Thermal Overload Relay

  • Product Introduction: This is an adjustable industrial grade thermal overload relay of AEG with the model 43506698, with a rated current adjustment range of 1-1.6 A, designed for overload and phase failure protection of small-power three-phase/asynchronous motors in industrial control systems. It adopts a bimetallic strip thermal sensing structure, manual/automatic reset, and phase failure protection function, with high protection accuracy and reliable action, and is a core motor protection component for small-power motor control in industrial automation systems such as fans, pumps and conveyors.
  • Technical Specifications:
    • Rated Current Adjustment Range: 1 A to 1.6 A (continuous adjustable), rated operating current 1.6 A (at 40°C).
    • Protection Functions: Motor overload protection, phase failure protection, thermal imbalance protection, manual/automatic reset optional.
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Detailed content

    • Sensing Structure: Bimetallic strip thermal sensing, temperature compensation design, protection accuracy ±5% of set current.
    • Tripping Time: 2 hours at 1.05×set current (no trip), 2 minutes at 1.2×set current, 10 seconds at 6×set current (instant trip).
    • Electrical Rating: AC 690 V, 50/60 Hz; Contact Capacity: 1 NC auxiliary contact, AC 250 V / 5 A, DC 30 V / 2 A.
    • Connection Method: Screw terminal, suitable for 0.5-1.5 mm² wire, torque value 0.5 N·m; Mounting Method: DIN rail mounting + panel mounting, snap-in design.
    • Reset Method: Manual reset (with reset button) + automatic reset (removable pin), reset time ≥5 minutes (automatic).
    • Enclosure Material: PA66 flame-retardant engineering plastic, UL94 V-0 flame retardant grade, IP20 protection rating.
    • Working Temperature: -25°C to +60°C; Storage Temperature: -40°C to +85°C; Humidity: 5% to 95% (non-condensing).
    • Dimensions: 30mm × 70mm × 65mm (W×H×D); Net Weight: 0.09 kg; Auxiliary Contact: 1 normally closed (NC).
  • Functional Features:
    • 1-1.6 A continuous adjustable rated current is specially designed for the overload protection of small-power motors, and the precise adjustment range can be perfectly matched with the rated current of small motors such as fans and micro pumps, with high protection accuracy (±5%).
    • Bimetallic strip thermal sensing structure with temperature compensation design ensures that the protection action is not affected by the ambient temperature change, and the tripping time is standardized in accordance with IEC standards, avoiding misoperation or delayed operation in different temperature environments.
    • Integrated phase failure and thermal imbalance protection functions effectively protect the three-phase motor from damage caused by phase failure operation and three-phase current imbalance, and the protection is more comprehensive than single overload protection relays.
    • Manual/automatic dual reset mode meets different on-site control requirements: the manual reset mode is suitable for fault troubleshooting and on-site confirmation, and the automatic reset mode is suitable for unmanned operation occasions, with strong flexibility.
    • Standardized tripping time characteristic (no trip at 1.05×set current, instant trip at 6×set current) ensures that the motor has sufficient starting current and is quickly protected when a short circuit or severe overload occurs, balancing motor starting and protection.
    • 1 NC auxiliary contact with 5 A AC contact capacity can be directly connected to the motor contactor coil circuit, realizing the interlock tripping of the contactor when the relay acts, and the wiring structure is simple and reliable.
    • PA66 flame-retardant enclosure with UL94 V-0 flame retardant grade meets the fire safety requirements of industrial control cabinets, and the compact structural design saves the installation space of the control cabinet, suitable for dense installation.
    • Standard 35mm DIN rail snap-in mounting and screw terminal wiring simplify on-site installation and wiring, the torque value of the terminal is standardized, and the connection is firm and anti-loose, avoiding poor contact caused by vibration.
    • The relay is designed with a test button for on-site simulation of overload fault, which is convenient for debugging the motor protection circuit without actual overload of the motor, improving on-site debugging efficiency.
    • Wide working temperature range (-25°C to +60°C) and strong environmental adaptability ensure stable protection performance in various industrial environments such as high temperature, low temperature and dust, with low failure rate.
  • Application Scenarios: Widely used for the overload and phase failure protection of small-power three-phase/asynchronous motors (1-1.6 A rated current) in industrial control systems such as factory automation production lines, building ventilation systems, water treatment micro-pumps, and light conveyor belts. It is the essential motor protection component for small-power motor control in occasions such as office building central air conditioning fans, workshop exhaust fans, and small liquid transfer pumps, and is suitable for all industrial and civil occasions that require reliable protection of small-power motors with rated current of 1-1.6 A.

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