The SUA143 series relays are designed for voltage monitoring in single-phase AC or DC systems and can be used for undervoltage or overvoltage monitoring without requiring an external supply voltage. The device features a compact 45mm enclosure and is equipped with one alarm relay with two changeover contacts. In overvoltage mode, the relay operates in N/O mode (de-energized) under normal conditions and energizes when the voltage exceeds the set threshold. In undervoltage mode, the relay operates in N/C mode (energized) under normal conditions and de-energizes when the voltage falls below the set threshold. The device has a release delay of approximately 120 ms and a hysteresis of approximately 3% to prevent nuisance tripping due to voltage fluctuations.
Product Specifications
Model: SUA143
Order No.: B932800
Brand: BENDER
Product Type: Voltage Relay
System Compatibility: Single-phase AC or DC systems
Supply Voltage: No external supply required
Rated Voltage (Ue): DC/AC 120…300V, 40…400Hz
Overload Capacity: DC/AC 300V
Response Value: DC/AC 120…300V, 40…400Hz
Power Consumption: ≤ 3.0 VA
Relay Contacts: AC 250V 5A
Enclosure Width: 45 mm
Operating Temperature: -15…+50 °C
Weight: ≤ 170 g
Product Standard: IEC 60255-6
Applications
Monitoring of power supply for motors and electrical installations, load monitoring, switching on and off at specific voltage levels, monitoring of stand-by and emergency supply systems, and supply voltage monitoring of portable loads.
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