Description
The Theben SUL 181 d Time Switch is a single-channel analogue timer for automatically switching compatible electrical loads according to a daily schedule. Its blue programming dial allows switching periods to be set in 15-minute increments, making it suitable for applications that require regular, repeated ON/OFF control.
Designed for DIN-rail installation, the SUL 181 d operates on a 110–230V AC supply. Its quartz-controlled clock and rechargeable power reserve help maintain timekeeping during temporary power interruptions.
Key Product Features
– Brand: Theben
– Model: SUL 181 d
– Product type: Analogue time switch
– Operating voltage: 110–230V AC
– Frequency: 50–60Hz
– Channels: 1
– Programming: Daily schedule
– Switching segments: 96
– Minimum switching interval: 15 minutes
– Timekeeping: Quartz-controlled
– Power reserve: Up to 200 hours at 230V, approximately 100 hours at 110V
– Rated switching capacity: 16A at 250V AC with resistive load conditions (cos φ = 1); 4A at cos φ = 0.6
– Installation: DIN rail, three modules wide
– Protection rating: IP20
– Manual modes: Continuous ON, AUTO, and continuous OFF
Applications of the Theben SUL 181 d
The SUL 181 d can be used in compatible installations that require scheduled switching, such as:
– Lighting circuits
– Ventilation equipment
– Electrical control panels
– Building services
– Pumps and other compatible electrical equipment
– Scheduled operation of electrical loads
Application suitability depends on the connected load, wiring arrangement, and switching capacity. For loads with high starting currents, check whether an appropriately rated contactor is required.
Why Choose the Correct Theben Time Switch?
Selecting the correct timer involves more than matching its appearance. Confirm the model number, supply voltage, terminal arrangement, and switching capacity before replacing an existing unit. The standard SUL 181 d (110–230V AC) is different from the SUL 181 d 24V variant.
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