CT-ARS.21S

Name: CT-ARS.21S
Brand: ABB
SKU: CT-ARS.21S

Compact OFF-delay time relay with 7 time ranges (0.05 s - 10 min) and universal voltage (24-240 V AC/DC). Ideal for industrial applications with 2 c/o contacts and easy-to-set potentiometers.

Product ModelCT-ARS.21S

Material Number1SVR730120R3300

Product ID86939

Stock on Request

Last updated: 8/29/2026

Quantity

Key Features

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1. Universal Voltage Compatibility DescriptionThe CT-ARS.21S operates on a wide voltage range of 24-240 V AC/DC, making it suitable for various industrial applications worldwide.
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2. Compact and Durable Design DescriptionWith a compact width of 22.5 mm, this time relay is designed to fit seamlessly into any control panel while providing a robust and reliable performance.
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3. Easy Time Delay Adjustment DescriptionThe device features easy-to-set front-face potentiometers with direct reading scales, allowing for accurate and quick adjustment of the time delay.
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4. OFF-Delay Functionality DescriptionThe CT-ARS.21S offers an OFF-delay function without auxiliary voltage, which means it does not require continuous control supply voltage for timing. This feature ensures reliable operation even during power outages.

Technical Specifications

Detailed engineering parameters based on manufacturer documentation

Specifications may be subject to change without notice

Parameter

Value

Parameter

Value

Product Net Width

22.5 mm

Product Net Height

85.6 mm

Product Net Depth / Length

103.7 mm

Product Net Weight

0.124 kg

Timer Relay Type

True OFF-Delay

Time Range

0.05 s ... 10 min

5. High Reliability and Versatility DescriptionWith 7 time ranges from 0.05 seconds to 10 minutes, this time relay is versatile and can be used in a variety of applications, including those requiring precise timing control.

6. Integrated Status Indication DescriptionThe device includes a green LED for status indication, displaying when the control supply voltage is applied, ensuring easy monitoring of its operational state.

7. Sealable Transparent Cover Option DescriptionAn optional sealable transparent cover is available for protection against unauthorized changes to the time values, enhancing security and reliability in critical applications.

8. Approvals and Certifications DescriptionThe CT-ARS.21S meets various international standards, including UL 508, CAN/CSA C22.2 No.14, and CE certification, ensuring compliance with global regulatory requirements.

9. Integrated Marker Label DescriptionAn integrated marker label is provided for easy identification and labeling of the device, facilitating maintenance and troubleshooting.

10. Accessory Options DescriptionThe device is compatible with various accessories such as an adapter for screw mounting on panels, a sealable transparent cover, and a marker label, enhancing its usability and customization options.

Rated Control Supply Voltage (Us)

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) 1.5 A

Minimum Switching Capacity

12 V 100 mA

Rated Impulse Withstand Voltage (Uimp)

Input Circuit 4 kV Output Circuit 1 / Output Circuit 2 4 kV

Rated Insulation Voltage (Ui)

Input Circuit / Output Circuit 500 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 10 A

Electrical Durability

AC-12 100000 cycle

Mechanical Durability

30000000 cycle

Connecting Capacity

Flexible with Ferrule 1x 0.5 ... 2.5 mmÂ² Flexible with Ferrule 2x 0.5 ... 1.5 mmÂ² Flexible with Insulated Ferrule 1x 0.5 ... 2.5 mmÂ² Flexible with Insulated Ferrule 2x 0.5 ... 1.5 mmÂ² Flexible 1x 0.5 ... 2.5 mmÂ² Flexible 2x 0.5 ... 1.5 mmÂ² Rigid 1x 0.5 ... 4 mmÂ² Rigid 2x 0.5 ... 2.5 mmÂ²

Tightening Torque

0.6 ... 0.8 NÂ·m

Wire Stripping Length

8 mm

Recommended Screw Driver

0.8 x 4 4.5 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/EN 61812-1 UL 508

Maximum Operating Voltage UL/CSA

Output Circuit 300 V AC

Contact Rating UL/CSA

B300

Connecting Capacity UL/CSA

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

Tightening Torque UL/CSA

7.08 inÂ·lb

Pilot Duty UL/CSA

B300

Flammability According to UL94

V-0

Ambient Air Temperature

Operation -25 ... +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)

2712207

E-Number (Norway)

4187962

E-Number (Sweden)

4033119

Manufacturer ID

1SVR730120R3300