ABB CT-SDE electronic timer relay with star-delta change-over function, 0.3–30 s timing range and 110–130 V AC control supply for industrial motor starting applications.
£58.94
The ABB CT-SDE is a compact and reliable electronic timer relay from the ABB CT-E timer relay range, designed for accurate star-delta motor starting control in industrial automation, electrical control panels and OEM equipment. It provides a dedicated star-delta change-over timing function for controlled motor starting sequences.
The CT-SDE offers a simple and efficient timing solution with a compact 22.5 mm housing, DIN rail mounting capability and screw terminal connections. Its single-function design provides straightforward configuration for repeat industrial applications requiring reliable star-delta switching control.
With an adjustable time range of 0.3–30 s, a rated control supply voltage of 110–130 V AC and a 1 c/o relay output rated at 250 V / 4 A, the ABB CT-SDE provides dependable timing control for motor starting systems and industrial automation applications.
Electronic timer relays such as the ABB CT-SDE provide accurate timing functions for controlling star-delta motor starting sequences. By managing the transition between star and delta connections, the timer relay supports controlled motor starting in industrial applications.
The ABB CT-E timer relay range is designed for OEM equipment manufacturers, panel builders and industrial automation engineers requiring compact, reliable and easy-to-integrate timing solutions.
| Manufacturer | ABB |
|---|---|
| Series | CT-E Timer Relays |
| Model | CT-SDE |
| Ordering code | 1SVR550210R4100 |
| Product type | Electronic timer relay |
| Timing function | Star-delta change-over |
| Time range | 0.3–30 s |
| Rated control supply voltage | 110–130 V AC |
| Output | 1 c/o (SPDT) contact |
| Rated operational current AC-12 | 4 A at 230 V |
| Rated operational current AC-15 | 3 A at 230 V |
| Rated operational current DC-12 | 4 A at 24 V |
| Rated operational current DC-13 | 2 A at 24 V |
| Terminal type | Screw terminals |
| Mounting type | DIN rail mounting |
| Protection rating | IP20 |
| Dimensions (W × H × D) | 22.5 × 78 × 78.5 mm |
| Weight | approx. 0.068 kg |
The ABB CT-SDE is an electronic timer relay used for star-delta motor starting control applications in industrial automation systems.
The CT-SDE provides a star-delta change-over timing function for controlling motor starting sequences.
The ABB CT-SDE has an adjustable time range of 0.3–30 s.
The CT-SDE operates with a rated control supply voltage of 110–130 V AC.
The CT-SDE features a 1 c/o (SPDT) relay output rated for industrial control switching applications.
ABB CT-E timer relays are widely used in industrial automation and control systems to provide accurate timing functions, reliable switching and compact integration into electrical panels.
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LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...