TB388B Wall mounting daily program Analog Time Controls

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TB388B Wall mounting daily program Analog Time Controls

The TB388B/438B analog time switches are the affordable cost alternative for applications that require more than 20A and wide voltage 110-230 VAC. Unit is mounted in a metal enclosure.


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Common functions TB388B
■ Analogue time switch ■ Metal enclosure with IP40,prevent electromagnetic interference
■ 24-Hour or 7-day applications TB438
■ Finger-safe terminals ■ Metal enclosure withdouble layer protection, Rain-proof
■ 1 channel
■ Switching status display Applications
■ Quartz controlled Billboard or Showcase lighting
■ Shortest switching time:15 minutes Air-condition or Commercial Refrigeration
■ 96 switching segments Pumps/Motor/Geyser/Fan Control
■ With power reserve (Nickel metal hydride battery replacement ) Hydroponic Systems
■ Clock hands for time display Wastewater Treatment Systems
■ Simple summer/winter time correction Generator Exercising
Boilers / Heater Control
Pool & Spa

Technical data

Type TB388B TB438B
Operating voltage  110-230VAC
Frequency  50-60 Hz
Number of channels 1
Width 107mm 123mm
Installation type  Wall mounting
Type of connection Screw terminals
Drive Quartz-controlled stepper motor
Program  Daily program
Power reserve 300 hours
Max. switching capacity at 250 V AC, cos φ = 1 20 A
Max. switching capacity at 250 V AC, cos φ = 0.6 12 A
Incandescent/halogen lamp load 2300W
Motor load(cos∅=0.7) AC110.750W   AC220V.1500W
Fluorescent lamp load (conventional) parallel-corrected 1300VA 70uF
Shortest switching time  15 min
Programmable every  15 min
Time accuracy at 25 °C  ≤ ± 2 s/day(Quartz)
Switch type SPDT
Contact type  Not potential-free
Number of switching segments 96
Power consumption 3 VA
Test approvals CE
Housing and insulation material High-temperature resistant, self-extinguishing thermoplastic
Type of protection IP 40 IP 55
Protection class II in accordance with EN 60730-1
Ambient temperature –10 °C … +50 °C