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CNB2011024 Lovato LATCHING RELAY 1M 20A AC1 1P+NC 24V
Lovato CNB2011024 is a single-module latching relay with 20 A conventional thermal current, 24 V AC control voltage, manual control and a two-pole 1NO+1NC contact configuration for pulse-operated switching applications.
£38.00
Why Choose the Lovato CNB2011024 Latching Relay?
The Lovato CNB2011024 is a compact modular latching relay designed for switching electrical loads using pulse-operated control. Part of the Lovato CNB series, it provides a 20 A conventional thermal current, a 24 V AC control voltage and a 1NO+1NC contact configuration in a space-saving single-module format.
Unlike a conventional contactor that requires continuous coil energisation to maintain its switched state, the CNB2011024 changes state in response to a control impulse and mechanically retains that state until the next switching command. This operating principle makes latching relays particularly useful for lighting, building control and other installations where loads need to be controlled from one or more momentary pushbuttons.
The CNB2011024 features manual control, mounts on a standard 35 mm DIN rail and occupies only 1 DIN module. With a rated insulation voltage of 440 V, a rated impulse withstand voltage of 4 kV and a mechanical life of 3,000,000 cycles, it provides a practical switching solution for professional modular electrical installations.
Key Advantages
- 20 A conventional thermal current for compatible electrical loads.
- 24 V AC control voltage for low-voltage control circuits.
- 1NO+1NC contact configuration provides normally open and normally closed switching functions.
- Latching operation retains the selected switching state without continuous coil energisation.
- Integrated manual control provides local operation when required.
- Compact 1 DIN module construction saves distribution-board space.
- Long 3,000,000-cycle mechanical life for dependable switching service.
Key Features
- Lovato CNB series latching relay.
- 2-pole configuration.
- 1NO + 1NC contacts.
- 20 A IEC conventional free-air thermal current Ith.
- 24 V AC auxiliary supply voltage Us.
- 440 V rated insulation voltage Ui.
- 4 kV rated impulse withstand voltage Uimp.
- Manual control included.
- 5–20 ms average closing and opening operating times.
- 35 mm DIN rail mounting.
- IP20 frontal protection.
- Compact 1-module construction.
Efficient Pulse-Operated Switching
A latching relay changes its contact state when an electrical control impulse is applied and retains that state after the impulse has ended. A subsequent command changes the state again, allowing a load to be controlled without continuously energising the relay coil. This operating principle can reduce control-circuit energy consumption and is particularly useful where switching commands originate from momentary pushbuttons.
The Lovato CNB2011024 combines this latching operation with a 1NO+1NC contact arrangement, manual control and compact DIN rail construction. Its 24 V AC control circuit makes it suitable for compatible extra-low-voltage control systems, while its modular format enables straightforward integration into distribution boards and building-control panels.
Typical Applications
- Lighting control circuits operated by momentary pushbuttons.
- Commercial and residential building control systems.
- Industrial control and automation panels.
- Multi-point switching installations.
- DIN rail electrical distribution boards.
- Circuits requiring 24 V AC pulse-operated switching.
Technical Specifications
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| Poles | 2-pole | |
|---|---|---|
| Device Type | Accessory | |
| HS Code | 85365080 | |
| Manufacturer | Lovato Electric | |
| Series | CNB | |
| Model | CNB2011024 | |
| Product type | Latching relay | |
| Operating voltage type | AC | |
| Manual control | Yes | |
| Number of poles | 2 | |
| Contact configuration | 1NO + 1NC | |
| Number of DIN modules | 1 | |
| IEC conventional free-air thermal current Ith at ≤40 °C | 20 A | |
| Auxiliary rated supply voltage Us | 24 V AC | |
| Rated insulation voltage Ui | 440 V | |
| Rated impulse withstand voltage Uimp | 4 kV | |
| Minimum switching capacity | ≥10 V, ≥100 mA | |
| Average power dissipation per pole at Ith | 1.7 W | |
| Average inrush coil consumption at ≤20 °C | 18/13 W | |
| Pick-up voltage range | 85–110% Us | |
| Average NO closing time | 5–20 ms | |
| Average NO opening time | 5–20 ms | |
| Mechanical life | 3,000,000 cycles | |
| Electrical life AC-1 | 200,000 cycles | |
| Electrical life AC-3 | 300,000 cycles | |
| Operating temperature | -5 to +55 °C | |
| Storage temperature | -30 to +80 °C | |
| Maximum operating altitude | 2,000 m | |
| Mounting | 35 mm DIN rail | |
| Coil terminal conductor section | 1–2.5 mm² | |
| Power terminal conductor section | 1–10 mm² | |
| Maximum coil terminal tightening torque | 0.6 Nm | |
| Maximum power terminal tightening torque | 1.2 Nm | |
| Terminal tool | PZ2 | |
| Frontal protection rating | IP20 | |
| Pollution degree | 3 | |
| Conformity | IEC/EN/BS 60947-1, IEC/EN/BS 60947-4-1, IEC/EN/BS 60947-5-1, IEC/EN/BS 61095, IEC/EN/BS 60669-1, IEC/EN/BS 60669-2-2 | |
| Weight | approx. 140 g | |
| EAN | 8013975242766 |
Frequently Asked Questions
What is the Lovato CNB2011024?
The CNB2011024 is a modular latching relay with a 20 A conventional thermal current rating, 24 V AC control voltage and 1NO+1NC contact configuration.
What control voltage does the CNB2011024 require?
The Lovato CNB2011024 has an auxiliary rated supply voltage Us of 24 V AC.
What contacts does the CNB2011024 have?
The CNB2011024 has two poles arranged as 1 normally open (NO) and 1 normally closed (NC) contact.
What is the current rating of the Lovato CNB2011024?
The CNB2011024 has an IEC conventional free-air thermal current Ith of 20 A at temperatures up to 40 °C.
Does the CNB2011024 require continuous coil power to remain switched?
No. As a latching relay, it changes state in response to a control impulse and mechanically retains its switched state after the control impulse has ended.
Does the Lovato CNB2011024 have manual control?
Yes. The CNB2011024 incorporates manual control, allowing local operation of the latching mechanism.
How is the CNB2011024 installed?
The CNB2011024 occupies 1 DIN module and mounts on a standard 35 mm DIN rail in compatible distribution boards and electrical control panels.
Trusted Modular Switching from Lovato Electric
Lovato Electric modular switching devices provide practical solutions for building, commercial and industrial control systems where reliable switching, compact DIN rail installation and straightforward integration with electrical control circuits are required.
