−12%

Legrand LEG 412656 AlphaRex D21 astro 24V AC Astro time switch, 1K

was CHF227.–
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Delivered between 11.3.2026 and 25.3.2026
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Product details

The AlphaRex³ D21 digital astro timer from Legrand is a highly advanced solution for the automated control of lighting systems. It offers a variety of features that enable precise and flexible programming. With an operating voltage of 24 V and the ability to combine both astro and weekly timer functions, this device is ideal for use in various applications. Programming can be done directly on the device or via a PC using the AlphaSoft software, ensuring user-friendly handling. The timer is designed for mounting on a DIN rail and offers an accuracy of +/- 0.1 sec/day as well as a backup time of up to 5 years. With 56 programmable switching programs and various functions such as holiday program and random program, the AlphaRex³ D21 is a versatile and reliable choice for the timed control of electrical devices.

  • Astro function for automatic adjustment to sunrise and sunset
  • Programming directly on the device or via PC with AlphaSoft
  • Permanent ON/OFF, holiday program, and random program available
  • Backlighting and PIN code lock for additional security
  • Zero-cross switching for gentle switching of loads.

Key specifications

Type of time switch
Digital timer
Switching cycle
Weekly program
Mounting type
Top-hat rail
Documents
Assembly instructions.pdf
Item number
32099639

General information

Manufacturer
Legrand
Category
Timers
Manufacturer no.
412656
Release date
16.11.2022

Timer properties

Type of time switch
Digital timer
Switching cycle
Weekly program
Number of programmes
56x
Mounting type
Top-hat rail

Safety

Protection type (IP code)
IP20

Power supply

Electric current
16 A
Nominal voltage
24 V

Smart home features

Smart Home
Not compatible
Requires Smart Home Hub
No

Scope of delivery

Scope of delivery
1

Origin

Country of origin
Germany, Italy

Sustainability

Manufacturer commitment
SBTi

Voluntary climate contribution

CO₂-Emission
Climate contribution

Product dimensions

Length
60 mm
Width
35.60 mm
Height
83 mm

Package dimensions

Length
9.50 cm
Width
8 cm
Height
6 cm
Weight
162 g

30-day right of return
24 Months Warranty (Bring-in)

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Reviews & Ratings

Warranty score

How often does a product of this brand in the «Timers» category have a defect within the first 24 months?

Source: Digitec Galaxus
  • Legrand
    Not enough data
  • 1.Renkforce
    0.3 %
  • 2.Max Hauri
    0.4 %
  • 3.Hager
    0.6 %
  • 3.Theben
    0.6 %

Warranty case duration

How many working days on average does it take to process a warranty claim from when it arrives at the service centre until it’s back with the customer?

Source: Digitec Galaxus
  • Legrand
    Not enough data
  • 1.Brennenstuhl
    0 days
  • 1.intertechno
    0 days
  • 1.Max Hauri
    0 days
  • 1.Schönenberger
    0 days

Return rate

How often is a product of this brand in the «Timers» category returned?

Source: Digitec Galaxus
  • Legrand
    Not enough data
  • 1.Steffen
    0.7 %
  • 2.Max Hauri
    0.8 %
  • 3.Theben
    1.2 %
  • 4.Elbro
    1.3 %
Source: Digitec Galaxus