CT-MFC.21

Name: CT-MFC.21
Brand: ABB
SKU: CT-MFC.21

The ABB CT-MFC.21 is a multifunctional time relay designed for control automation systems. It features 2 changeover contacts, a timing range of 0.05 seconds to 100 hours, and operates on 12-240VAC/DC. This reliable and efficient relay is suitable for various applications, ensuring precise timing control.

Product ModelCT-MFC.21

Stock on Request

Last updated: 8/29/2026

Quantity

Key Features

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1. Versatile Timing RangeThe CT-MFC.21 offers a wide timing range from 0.05 seconds to 100 hours, making it suitable for a variety of applications.
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2. Dual Changeover ContactsEquipped with 2 changeover contacts, this relay provides flexible control options for your automation needs.
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3. Wide Voltage CompatibilityOperating on 12-240VAC/DC, this relay is compatible with a broad range of voltage requirements, ensuring it can be easily integrated into different systems.
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4. Reliable PerformanceDesigned with IP50 and IP20 terminals, this relay offers reliable performance in various environmental conditions, from -20°C to 60°C.
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Technical Specifications

Detailed engineering parameters based on manufacturer documentation

Specifications may be subject to change without notice

Parameter

Value

Parameter

Value

Product Net Width

17.5 mm

Product Net Height

80 mm

Product Net Depth / Length

63 mm

Product Net Weight

0.066 kg

Timer Relay Type

ON-Delay OFF-Delay Impulse ON Impulse OFF Flasher Starting with ON Flasher Starting with OFF Pulse Former

Time Range

0.05 s ... 100 h

5. Compliance with International StandardsThe CT-MFC.21 meets international standards such as CAN/CSA C22.2 No. 14, EN 50581, IEC 61812-1, and UL 508, ensuring it meets the highest safety and performance standards.

Rated Control Supply Voltage (Us)

12 ... 240 V AC/DC

Rated Operational Voltage

Auxiliary Circuit 250 V

Rated Frequency (f)

50 / 60 Hz DC

Output

2 c/o (SPDT) contacts

Terminal Type

Screw Terminals

Rated Operational Current AC-12 (Ie)

(230 V) 4 A

Rated Operational Current AC-15 (Ie)

(230 V) 3 A

Rated Operational Current DC-12 (Ie)

(24 V) 4 A

Rated Operational Current DC-13 (Ie)

(24 V) 1 A

Minimum Switching Capacity

12 V 100 mA

Rated Impulse Withstand Voltage (Uimp)

Input Circuit 4 kV

Rated Insulation Voltage (Ui)

Input Circuit / Output Circuit 300 V Output Circuit 1 / Output Circuit 2 300 V

Degree of Protection

Housing IP50 Terminals IP20

Overvoltage Category

III

Pollution Degree

Short-Circuit Protective Devices

Output Circuit NC - F Type Fuses 6 A Output Circuit NO - F Type Fuses 6 A

Connecting Capacity

Flexible 1x 0.5 ... 2.5 mmÂ² Flexible 2x 0.5 ... 1.5 mmÂ² Rigid 1x 0.5 ... 4 mmÂ² Rigid 2x 0.5 ... 1.5 mmÂ²

Tightening Torque

0.5 ... 0.8 NÂ·m

Wire Stripping Length

7 mm

Recommended Screw Driver

0.8 x 4 Pozidriv 1

Mounting Position

1 ... 6

Mounting on DIN Rail

TH35-15 (35 x 15 mm Mounting Rail) acc. to IEC 60715 TH35-7.5 (35 x 7.5 mm Mounting Rail) acc. to IEC 60715

Standards

CAN/CSA C22.2 No.14 IEC/EN 63000 IEC 61812-1 UL 508

Maximum Operating Voltage UL/CSA

Output Circuit 300 V AC

Contact Rating UL/CSA

(NO:) B300 (NC:) C300

Connecting Capacity UL/CSA

Flexible 1x 18-14 AWG Flexible 2x 18-16 AWG Rigid 1x 20-12 AWG Rigid 2x 20-16 AWG

Tightening Torque UL/CSA

4.43 ... 7.08 inÂ·lb

Pilot Duty UL/CSA

NC B300 NO C300

Flammability According to UL94

V-2

Ambient Air Temperature

Operation -20 ... +60 Â°C Storage -40 ... +85 Â°C

Maximum Operating Altitude Permissible

Without Derating 2000 m

Object Classification Code

ETIM 7

EC001439 - Timer relay

ETIM 8

EC001439 - Timer relay

ETIM 9

EC001439 - Timer relay

eClass

V11.0 : 27371605

UNSPSC

39122329

E-Number (Finland)

2712826

E-Number (Norway)

4189317

E-Number (Sweden)

4030217

Manufacturer ID

1SVR508020R1100