CT-APS.21S

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

The ABB CT-APS.21S is a single-function electronic time relay with OFF-delay function, offering 10 time ranges from 0.05 s to 300 h. It operates on 24-240V AC/DC and features 2 c/o (SPDT) contacts rated at 250V/4A.

Product ModelCT-APS.21S

Material Number1SVR730180R0300

Product ID86837

Stock on Request

Last updated: 8/29/2026

Quantity

Key Features

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1. Versatile Time RangesThe CT-APS.21S provides 10 time ranges from 0.05 seconds to 300 hours, making it suitable for a wide range of industrial applications.
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2. Wide Voltage CompatibilityThis time relay operates on a continuous rated control voltage of 24-240V AC/DC, ensuring compatibility with various supply voltages worldwide.
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3. Reliable ContactsEquipped with 2 c/o (SPDT) contacts rated at 250V/4A, providing reliable and efficient switching performance.
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4. Durable ConstructionBuilt with high-quality materials and designed for mechanical durability of 30 million cycles, ensuring long-lasting performance in harsh industrial environments.
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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

22.5 mm

Product Net Height

85.6 mm

Product Net Depth / Length

103.7 mm

Product Net Weight

0.146 kg

Timer Relay Type

OFF-Delay

Time Range

0.05 s ... 300 h

5. Easy InstallationFeatures screw connection technology with double-chamber cage connection terminals, making it easy to install and maintain on DIN rails.

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) 2 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 -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)

2712208

E-Number (Norway)

4187952

E-Number (Sweden)

4033120

Manufacturer ID

1SVR730180R0300