Why Choose the Lovato CNB2011230 Latching Relay?
The Lovato CNB2011230 is a compact modular latching relay designed for pulse-operated switching in electrical control and building automation applications. Part of the Lovato CNB series, it combines a 20 A conventional thermal current, 230 V AC control supply and 1NO+1NC contact configuration within a space-saving single-module enclosure.
Unlike a conventional contactor that requires continuous coil energisation to maintain its operating state, the CNB2011230 changes state following a control impulse and retains that state until the next switching command. This latching operation makes it particularly useful for lighting and building-control circuits operated from one or more momentary pushbuttons.
The CNB2011230 includes manual control, mounts on a standard 35 mm DIN rail and occupies only 1 DIN module. A rated insulation voltage of 440 V, rated impulse withstand voltage of 4 kV and mechanical endurance of 3,000,000 cycles support dependable operation in professional modular electrical installations.
Key Advantages
- 20 A conventional thermal current for compatible electrical loads.
- 230 V AC control supply for mains-voltage control applications.
- 1NO+1NC contact arrangement provides normally open and normally closed switching functions.
- Latching operation retains the selected state without continuous coil energisation.
- Integrated manual control provides convenient local operation.
- Compact 1 DIN module design saves space in distribution boards.
- 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.
- 230 V AC auxiliary rated supply voltage Us.
- 440 V rated insulation voltage Ui.
- 4 kV rated impulse withstand voltage Uimp.
- Manual control included.
- 5–20 ms average NO closing and opening 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 the selected state after the impulse has ended. A subsequent control command changes the state again, allowing electrical loads to be switched without continuously energising the relay coil. This principle is particularly useful for installations using momentary pushbuttons at multiple control points.
The Lovato CNB2011230 combines this latching operation with a 1NO+1NC contact arrangement, manual control and compact DIN rail construction. Its 230 V AC control supply makes it suitable for compatible mains-voltage control circuits, while its modular format allows straightforward integration into distribution boards and building-control panels.
Typical Applications
- Lighting 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 230 V AC pulse-operated switching.
