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Electrical Time Switches, Timers & Control Relays

ABB TIME RELAY MULTI FUNCTION 0.05s-100h 2C/O 12-240V AC/DC CT-MFD.21

Product Code: CT-MFD.21

The CT-MFD.21 is a multifunction electronic time relay from the CT-D timer range. It provides 7 timing functions with 7 time ranges from 0.05 s to 100 h. This time relay operates with a rated control supply voltage of 12 - 240 V AC / DC and has a 2 c/o (SPDT) output with contacts rated at 250 V / 5 A. A control input works with voltage-related (non-floating) triggering.

Technical Specifications

Connecting Capacity Flexible 1 x 0.5 - 2.5mm² Flexible 2 x 0.5 - 1.5mm² Rigid 1 x 0.5 - 4mm² Rigid 2 x 0.5 - 1.5mm²
Recommended Screwdriver 0.8 x 4, Pozidriv 1
Brand ABB
Ambient Temperature Range (°C) -20 to 60
Degree of Protection Housing: IP50, Terminals: IP20
Dimensions (mm) 17.5W x 80H x 63D
Outputs 2 x Change-over (SPDT) Contacts
Overvoltage Category III
Pollution Degree 3
Rated Control Supply Voltage AC/DC (V) 24 - 240
Rated Frequency (Hz) 50/60
Rated Impulse Withstand Voltage (kV) Input Circuit: 4kV
Rated Insulation Voltage (V) Input/Output Circuit: 300V, Output Circuit 1/2: 300V
Rated Operational Current AC-12 230V (A) 5
Rated Operational Current AC-15 230V (A) 3
Rated Operational Current DC-12 24V (A) 5
Rated Operational Current DC-13 24V (A) 1
Rated Operational Voltage (V) Auxiliary Circuit: 250V
Relay Type ON-Delay OFF-Delay Impulse ON Impulse OFF Flasher Starting with ON Flasher Starting with OFF Pulse Former
Standards and Approvals IEC/EN 63000, IEC/EN 61812-1, UL 508
Storage Temperature Range (°C) -40 to 85
Terminal Type Screw
Tightening Torque (Nm) 0.5 - 0.8
Time Ranges 0.05s - 100h
Weight (kg) 0.066
Wire Stripping Length (mm) 7

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