Selec CH403B Cooling Controller – 2½ Digit LED Display

Product Summary:
The Selec CH403B is a compact cooling controller featuring a 2½ digit LED display, capacitive touch keypad, defrost management, and ON-OFF control. Designed for NTC input, it is perfect for refrigeration systems requiring precise temperature control and reliability.

Key Features:

• 2½ digit single display (7-segment LED)

• Capacitive touch keypad

• ON-OFF control with a single setpoint

• NTC sensor input

• Defrost management with restart time delay

• High-accuracy ±0.25% FS or ±1°C

• Relay outputs: 10A / 20A options

• Panel mountable, IP65 front panel protection

• Available in multiple output variants

• Supply voltage: 230V AC

Applications:

• Cold storage units

• Food and beverage cooling systems

• Industrial refrigeration

• Display cabinets and chillers

• HVAC equipment

Product Benefits:

• Easy-to-read LED display with precision resolution

• Capacitive touch keypad ensures durability and hygiene

• Compact size fits most standard panels

• Reliable performance with built-in defrost mode

• Ideal for demanding cooling environments with IP65 frontal protection

FAQs:
Q1: Can the Selec CH403B controller be used with other types of sensors besides NTC?
A1: No, the CH403B is specifically designed for NTC type sensors.

Q2: What is the restart time delay used for?
A2: The restart time delay prevents short cycling by adding a timed delay before restarting the system after power recovery.

Q3: Does it have dual relay output options?
A3: Yes, the CH403B-3-NTC model variant includes dual relay outputs (20A + 5A).