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ABB 1SVR730100R0300
CT-ERS.21S TIME RELAY ON-DELAY
Product Description
The CT-ERS.21S operates with a rated control supply voltage of 24 to 240 V AC/DC and includes a 2 c/o (SPDT) output, with contact ratings of 250 V at 4 A. This time relay is designed for a variety of applications, providing versatility with its ten selectable time ranges. The device features screw terminal connections and is housed in a unit with a degree of protection rated at IP50 for the housing and IP20 for the terminals.
With dimensions of 22.5 mm in width, 85.6 mm in height, and 103.7 mm in depth, the relay is compact, weighing 0.13 kg. It maintains a reliable performance across a significant operational temperature range from -40 °C to +60 °C, and can be stored at temperatures between -40 °C and +85 °C. The maximum permissible operating altitude without derating is 2000 meters.
The relay is compliant with several standards including CAN/CSA C22.2 No.14 and IEC/EN 61812-1, ensuring it meets rigorous safety and operational requirements. Additionally, it features environmental compliance with RoHS directives, confirming its adherence to sustainable manufacturing practices. The CT-ERS.21S is suitable for various industrial applications where precise timing control is essential.
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Offer details
- Offer from:
- Trusted supplier — United Kingdom, member since 2021
- Availability:
- 4 pcs.Updated at: 31-10-2025In-Stock
- Warranty:
- Not specified
- Condition:
- New Factory Sealed
Specifications
- Brand
- ABB
- American Recovery and Reinvestment Act (ARRA) Compliant
- Contact Manufacturer
- Buy American Act (BAA) Compliant
- Contact Manufacturer
- Minimum Order Quantity
- 1 piece
- Timer Relay Type
- ON-Delay
- Time Range
- 0.05 s ... 300 h
- Rated Control Supply Voltage (Us)
- 24 ... 240 V AC/DC
Available Offers
(2)| Condition | Availability | Supplier | Warranty | Action | |
|---|---|---|---|---|---|
| Condition New Factory Sealed | Availability 4 pcs. Updated at: 31-10-2025In-Stock | Supplier United KingdomTrusted supplier — member since 2021 | Warranty Not specified | ||
| Condition New Factory Sealed | Availability 3 pcs. Updated at: 06-10-2026In-Stock | Supplier PolandTrusted supplier — member since 2023, 50–99 employees | Warranty 24 months |
Documents
Data Sheet
Datasheet for ABB 1SVR730100R0300, including specifications and features.
CAD Models
3D CAD model and technical drawings, ready for your design software.
Product data updated: 31-10-2025

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