CT-ERS.21P

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

The ABB CT-ERS.21P is a reliable electronic time relay designed for industrial applications. It provides an ON-delay function with 10 time ranges, from 0.05 seconds to 300 hours, and features precise adjustment via front-face operating elements.

Product ModelCT-ERS.21P

Material Number1SVR740100R0300

Product ID87145

Stock on Request

Last updated: 8/29/2026

Quantity

Key Features

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1. Versatile Time RangesThe CT-ERS.21P offers 10 time ranges, from 0.05 seconds to 300 hours, making it suitable for a variety of industrial applications.
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2. Precise AdjustmentThe relay features precise adjustment via front-face operating elements, ensuring accurate time delay settings.
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3. Tool-Free MountingThe unit can be easily mounted and demounted from a DIN rail without any tools, enhancing convenience and efficiency.
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4. High Fire Protection ClassificationThe housing material is classified as UL 94 V-0, ensuring the highest level of fire protection in hazardous 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

0.121 kg

Timer Relay Type

ON-Delay

Time Range

0.05 s ... 300 h

5. Universal Supply VoltageThe relay operates on a universal range of supply voltages (24-240 V AC/DC), making it compatible with various industrial power systems worldwide.

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) 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 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)

2712221

E-Number (Norway)

4187947

E-Number (Sweden)

4033133

Manufacturer ID

1SVR740100R0300