Brennenstuhl Mechanical Timer MMZ 20 – Compact 24-Hour Switch Timer for Indoor Use
The Brennenstuhl MMZ 20 is a mechanical day timer designed for straightforward indoor scheduling of electrical devices. It operates without batteries or electronics, relying on a purely mechanical program disc to control switching cycles.
96 switch times per day allow precise on/off scheduling in 15-minute increments
24-hour program disc with manual override for immediate on/off control
Plug-in design (between-socket mounting) requires no permanent installation
24-month manufacturer warranty provides long-term reliability for everyday use
What sets the MMZ 20 apart
Unlike electronic timers, the MMZ 20 functions entirely without power — it keeps time mechanically and never loses its program during a power outage. The compact plug-in form factor fits standard sockets without occupying additional space.
Ideal for...
Homeowners and renters who need a simple, reliable way to automate lighting, heating, or small appliances on a daily schedule — particularly useful for lamps, fans, and holiday lighting where manual switching is inconvenient.
Application of Brennenstuhl MMZ 20
Insert the timer into a standard wall socket
Set the desired on/off times by pressing the program pins on the 24-hour disc
Plug the device to be controlled into the timer's output socket
Switch to AUTO mode — the timer will execute the program automatically
Brennenstuhl is a German manufacturer specializing in electrical protection and scheduling devices, including timers, surge protectors, and extension cords. The brand focuses on practical, durable solutions for household and light-commercial electrical applications.
The MMZ 20 is a mechanical 24-hour day timer used to automate the on/off switching of electrical devices such as lamps, fans, and small appliances based on a pre-set program.
Up to 96 switch times per day, each adjustable in 15-minute increments, allowing fine-grained scheduling across the full 24-hour cycle.
The timer weighs 0.16 kg and is designed as a compact plug-in unit (between-socket mounting). No additional dimensions are specified by the manufacturer beyond the standard socket fit.
One Brennenstuhl MMZ 20 mechanical timer unit. No batteries or additional accessories are required — the timer operates entirely mechanically.
Brennenstuhl provides a 24-month manufacturer warranty on the MMZ 20, covering defects in materials and workmanship under normal indoor use.
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