1SVR508110R0000 ABB CT-AHC.12 Time Relay OFF-delay 1c/o
ABB CT-AHC.12 electronic OFF-delay time relay with one changeover output, 24–48 V DC or 24–240 V AC control supply and seven selectable time ranges from 0.05 s to 100 h.
The ABB CT-AHC.12 is a compact and reliable electronic OFF-delay time relay designed for precise timing and sequencing in industrial control and automation systems. As part of the established ABB CT-C timer relay range, it provides dependable delay-on-break operation for control panels, machinery and electrical automation applications.
This single-function timer relay provides seven selectable time ranges covering 0.05 s to 100 h, allowing the required delay to be set accurately for a wide range of control applications. Its front-mounted adjustment controls and compact housing simplify installation, commissioning and operation.
With a rated control supply voltage of 24–48 V DC or 24–240 V AC and one changeover relay output, the CT-AHC.12 provides flexible switching capability for industrial control circuits. Its compact 17.5 mm wide housing is well suited to installations where control panel space is limited.
Key Advantages
Compact OFF-delay electronic time relay for industrial automation applications.
Seven selectable time ranges from 0.05 s to 100 h.
24–48 V DC or 24–240 V AC control supply for flexible installation.
One changeover (1 c/o) relay output for versatile switching applications.
Adjustable timing for straightforward configuration of delayed switching sequences.
Compact 17.5 mm wide housing for space-efficient control panels.
Key Features
ABB CT-C timer relay range.
OFF-delay (delay-on-break) timing function.
1 c/o (SPDT) relay output.
24–48 V DC / 24–240 V AC rated control supply.
0.05 s to 100 h time range across seven selectable ranges.
250 V / 4 A rated output contact capability.
Voltage-related, non-floating control input.
DIN rail mounting for straightforward control panel installation.
Compact housing with screw terminals for industrial wiring.
Reliable Timing for Industrial Automation
Time relays such as the ABB CT-AHC.12 provide controlled delays within electrical automation systems. The OFF-delay function keeps the relay output energised for a defined period after the control signal is removed, helping coordinate contactors, motors, valves, indicators and other control equipment.
The CT-C range is designed for practical industrial control applications where accurate and repeatable timing is required. The CT-AHC.12 combines selectable time ranges, adjustable delay settings and a compact DIN rail-mounted housing for straightforward integration into control cabinets and electrical automation systems.
Typical Applications
Industrial automation and control panels.
Motor and contactor sequencing systems.
Machine control and production equipment.
Delayed switching of valves and actuators.
Lighting and signalling control systems.
Process control and electrical sequencing applications.
Technical Specifications
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Mounting Type
DIN rail
Device Type
Single-function timer
Timing Function
Off-delay
Timing Range
0.05 s – 100 h
Switching Current (A)
4 A
Series
CT-C Time Relays
Product type
Electronic time relay
Timing function
OFF-delay
Control supply voltage
24–240 V AC / 24–48 V DC
Time range
0.05 s–100 h
Number of time ranges
7
Output
1 c/o (SPDT) contact
Rated operational current AC-12
4 A at 230 V AC
Rated operational current AC-15
3 A at 230 V AC
Rated operational current DC-12
4 A at 24 V DC
Rated operational current DC-13
2 A at 24 V DC
Rated frequency
50 / 60 Hz / DC
Protection rating
IP50
Operating temperature
-20–+60 °C
Storage temperature
-40–+85 °C
Mounting type
DIN rail mounting
Terminal type
Screw terminals
Dimensions (H × W × D)
70 × 17.5 × 63 mm
Weight
approx. 0.053 kg
Frequently Asked Questions
What is the ABB CT-AHC.12 used for?
The CT-AHC.12 is an electronic OFF-delay time relay used to introduce a controlled time delay into industrial automation and electrical control circuits.
What time range does the CT-AHC.12 provide?
The relay provides seven selectable time ranges covering 0.05 s to 100 h.
What control supply voltage does the CT-AHC.12 require?
The CT-AHC.12 operates with a rated control supply of 24–48 V DC or 24–240 V AC.
How many outputs does the CT-AHC.12 have?
The timer relay has one changeover (1 c/o) SPDT relay output with a rated contact capability of up to 250 V / 4 A.
How large is the ABB CT-AHC.12?
The CT-AHC.12 has a compact housing measuring approximately 70 × 17.5 × 63 mm, making it suitable for space-conscious DIN rail control panel installations.
Trusted by Automation Engineers Worldwide
ABB CT-C time relays are widely used in industrial control and automation systems where reliable, adjustable timing and dependable switching performance are required.
Mounting Type
DIN rail
Device Type
Single-function timer
Timing Function
Off-delay
Timing Range
0.05 s – 100 h
Switching Current (A)
4 A
Series
CT-C Time Relays
Product type
Electronic time relay
Timing function
OFF-delay
Control supply voltage
24–240 V AC / 24–48 V DC
Time range
0.05 s–100 h
Number of time ranges
7
Output
1 c/o (SPDT) contact
Rated operational current AC-12
4 A at 230 V AC
Rated operational current AC-15
3 A at 230 V AC
Rated operational current DC-12
4 A at 24 V DC
Rated operational current DC-13
2 A at 24 V DC
Rated frequency
50 / 60 Hz / DC
Protection rating
IP50
Operating temperature
-20–+60 °C
Storage temperature
-40–+85 °C
Mounting type
DIN rail mounting
Terminal type
Screw terminals
Dimensions (H × W × D)
70 × 17.5 × 63 mm
Weight
approx. 0.053 kg
No documents available for this product.
UK delivery
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This productManufacturer Lead Time
Estimated Delivery 4 - 5 Days
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