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SG21NA300R Lovato SURGE PROTECTION DEVICE TYPE 2 1P+N+R.C.
Lovato SG21NA300R is a 1P+N Type 2 surge protection device with a replaceable plug-in cartridge, 20 kA rated discharge current, 300 V AC maximum continuous operating voltage and remote status contact for 230 V AC electrical systems.
£71.99
Why Choose the Lovato SG21NA300R Type 2 Surge Protection Device?
The Lovato SG21NA300R is a compact and reliable Type 2 surge protection device (SPD) designed to protect low-voltage AC electrical installations against transient overvoltages caused by indirect lightning events, induced surges and electrical switching operations. As part of the Lovato Electric SG2 series, it uses replaceable plug-in cartridges to simplify maintenance and restoration of surge protection after a cartridge reaches end of life.
Designed for 1P+N electrical systems, the SG21NA300R has a rated discharge current In of 20 kA and provides a maximum discharge current Imax of 50 kA L-N and 65 kA N-PE. Its voltage protection level Up of less than 1.5 kV helps limit potentially damaging transient voltages reaching downstream electrical and electronic equipment.
With a rated system voltage of 230 V AC and maximum continuous operating voltage Uc of 300 V AC, the SG21NA300R is suitable for single-phase AC distribution systems. The device also includes frontal operating/end-of-life indication and a remote contact, allowing SPD condition to be monitored from electrical control or building management systems.
Key Advantages
- Type 2 surge protection for low-voltage AC power systems.
- 1P+N configuration suitable for single-phase installations with neutral.
- 20 kA rated discharge current In for effective transient surge protection.
- Maximum discharge current Imax of 50 kA L-N / 65 kA N-PE.
- <1.5 kV voltage protection level Up on both L-N and N-PE paths.
- Replaceable plug-in cartridge design simplifies maintenance.
- Integrated remote contact and frontal operating/end-of-life indication.
Key Features
- Lovato Electric SG2 series.
- Type 2 surge protection device.
- 1P+N pole configuration.
- 230 V AC rated system voltage.
- 300 V AC maximum continuous operating voltage Uc.
- 20 kA rated discharge current In (8/20 µs).
- 50 / 65 kA maximum discharge current Imax (L-N / N-PE).
- <1.5 / <1.5 kV voltage protection level Up (L-N / N-PE).
- Integrated thermal protection.
- Frontal status indication and remote auxiliary contact.
- Replaceable plug-in surge protection cartridge.
- Compact two-module DIN rail design.
Reliable Protection Against Transient Overvoltages
Type 2 surge protection devices such as the Lovato SG21NA300R are designed to divert transient surge currents away from sensitive electrical equipment while limiting the voltage appearing across the protected installation. They are commonly used to protect against indirect lightning effects and switching-generated overvoltages within low-voltage distribution systems.
The SG2 series combines high surge discharge capability with replaceable plug-in cartridges, thermal protection and clear status indication. The SG21NA300R additionally incorporates remote signalling, making it suitable for installations where the condition of the surge protection device needs to be monitored from a control system or remote location.
Typical Applications
- Single-phase electrical distribution boards.
- Residential and commercial electrical installations.
- Industrial control and distribution panels.
- Building services and automation systems.
- Electrical installations containing sensitive electronic equipment.
- AC power systems requiring Type 2 transient overvoltage protection.
Technical Specifications
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| Device Type | Surge protection device | |
|---|---|---|
| SPD Type | Type 2 | |
| Remote Signal | Yes | |
| HS Code | 85365080 | |
| Manufacturer | Lovato Electric | |
| Series | SG2 | |
| Model | SG21NA300R | |
| Product type | Surge protection device (SPD) | |
| SPD type / class | Type 2 | |
| Application | AC power lines | |
| Operating voltage type | AC | |
| Pole configuration | 1P+N | |
| Rated system voltage | 230 V AC | |
| Maximum continuous operating voltage Uc | 300 V AC | |
| Rated discharge current In (8/20 µs) | 20 kA | |
| Maximum discharge current Imax (8/20 µs), L-N / N-PE | 50 / 65 kA | |
| Voltage protection level Up, L-N / N-PE | <1.5 / <1.5 kV | |
| Follow current If, N-PE | 100 A RMS | |
| Response time, L-N / N-PE | <25 / 100 ns | |
| Maximum short-circuit current at 50 Hz | 50 kA with line fuse ≤250 A / 25 kA with 315 A line fuse | |
| Thermal protection | Yes | |
| Status indication | Frontal operating / end-of-life indication | |
| Remote status output | Yes, auxiliary contact | |
| Cartridge type | Plug-in / replaceable | |
| Number of DIN modules | 2 | |
| Mounting type | DIN rail | |
| Weight | 270.9 g | |
| EAN | 8013975232736 | |
| Compliance | IEC/EN 61643-11 |
Frequently Asked Questions
What is the Lovato SG21NA300R used for?
The SG21NA300R is used to protect 1P+N AC electrical systems against transient overvoltages caused by indirect lightning effects, induced surges and electrical switching events.
What is the rated discharge current of the SG21NA300R?
The device has a rated discharge current In (8/20 µs) of 20 kA.
What is the maximum discharge current of the SG21NA300R?
The maximum discharge current Imax is 50 kA L-N and 65 kA N-PE.
Does the SG21NA300R have a remote contact?
Yes. The SG21NA300R includes a remote auxiliary contact for signalling the operating or end-of-life status of the surge protection device.
Can the surge protection cartridge be replaced?
Yes. The SG21NA300R uses a plug-in cartridge design, allowing the surge protection cartridge to be replaced without replacing the complete DIN rail base assembly.
Trusted Surge Protection from Lovato Electric
Lovato Electric SG2 surge protection devices provide dependable Type 2 protection for low-voltage AC distribution systems, combining high surge discharge capability with replaceable cartridges, clear status indication and practical remote monitoring options.
