CT-ARS.21P

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

The ABB CT-ARS.21P is a reliable single-function electronic time relay designed for industrial applications. It provides a true OFF-delay function without the need for auxiliary voltage, ensuring precise timing in various environments.

Product ModelCT-ARS.21P

Material Number1SVR740120R3300

Product ID87772

Stock on Request

Last updated: 8/29/2026

Quantity

Key Features

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1. True OFF-Delay FunctionThe CT-ARS.21P offers a true OFF-delay function without requiring auxiliary voltage, making it ideal for applications where continuous control supply voltage is not always available.
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2. Versatile Time RangesWith 7 time ranges from 0.05 seconds to 10 minutes, the CT-ARS.21P can be easily adjusted to meet the specific timing needs of your industrial setup.
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3. Precise AdjustmentThe front-face operating elements, including a rotary switch and fine adjustment potentiometer, ensure precise time delay settings with direct reading scales for accurate control.
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4. Universal CompatibilityCompatible with 24-240 V AC/DC supply voltages, the CT-ARS.21P can be used worldwide, making it a versatile solution for various industrial applications.

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

0.115 kg

Timer Relay Type

True OFF-Delay

Time Range

0.05 s ... 10 min

5. Compact DesignThe compact dimensions of the CT-ARS.21P, measuring 22.5 mm in width, 85.6 mm in height, and 103.7 mm in depth, make it easy to integrate into any industrial setup without taking up excessive space.

6. Durable ConstructionThe housing material is classified as UL 94 V-0, ensuring the highest fire protection standards, and the tool-free mounting on DIN rail simplifies installation and maintenance.

7. Reliable ContactsEquipped with 2 c/o (SPDT) contacts, the CT-ARS.21P provides reliable switching operations, ensuring consistent performance in demanding industrial environments.

8. Easy InstallationThe CT-ARS.21P supports both screw connection technology and Easy Connect Technology (Push-in terminals), offering flexibility in installation methods to suit different user preferences.

9. Status IndicationA single LED indicator provides status information, ensuring that the operation of the timer is easily monitored and understood.

10. Comprehensive ApprovalsThe CT-ARS.21P meets various international standards, including UL 508, CAN/CSA C22.2 No.14, and CB scheme, ensuring compliance with global regulatory requirements.

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

Screwless 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 2x 0.5 ... 1.5 mmÂ² Flexible with Insulated Ferrule 2x 0.5 ... 1.5 mmÂ² Flexible 2x 0.5 ... 1.5 mmÂ² Rigid 2x 0.5 ... 1.5 mmÂ²

Wire Stripping Length

8 mm

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 2x 18-16 AWG Rigid 2x 20-16 AWG

Pilot Duty UL/CSA

B300

Flammability According to UL94

V-0

Ambient Air Temperature

Operation -40 ... +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)

2712226

E-Number (Norway)

4187963

E-Number (Sweden)

4033138

Manufacturer ID

1SVR740120R3300