German Engineering · Since 1921

Precision Automated. Control Perfected.

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German Precision, Globally Trusted.

Theben is not a newcomer. Founded in 1921 in Haigerloch, Germany, this engineering house has spent over a century building the invisible systems that make buildings smarter, safer, and more efficient. Their time switches and automation controls are found in Europe's most demanding commercial and residential projects — and now, through KHO, in Indonesia's most prestigious addresses.

"Theben doesn't just control time. It controls the rhythm of a building — when lights rise, when systems breathe, when energy rests."

Theben SUL 181 D

The Classic That Never Misses a Beat

Simple to set. Impossible to fool. The SUL 181 d is Theben’s benchmark analogue time switch — a quartz-controlled daily programmer built for one purpose: switching your electrical circuits on and off at exactly the right time, every single day, without fail.

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Key Features

Quartz-Controlled Accuracy

Driven by a quartz-controlled stepper motor with a time accuracy of ≤ ±1 second per day at 25°C. Set it once, trust it completely.

200-Hour Power Reserve

Built-in NiMH rechargeable battery maintains the clock and program settings for up to 200 hours during a power outage

96 Switching Segments

Up to 96 individual switching points programmable in 15-minute intervals

3-Position Manual Override

Switch between Continuous ON, AUTO, or Continuous OFF at any time.

DuoFix Spring Terminals

Tool-free wiring via Theben's DuoFix spring terminal system. Accepts wire or strand (with or without wire end sleeve) at 0.5–2.5 mm²

Switching Status Display

Visible switching status at a glance — always know the current state of your circuit.

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