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SA0B3NA320R Lovato SURGE PROTECTION DEVICE TYPE 1-2 3P+N

SA0B3NA320R Lovato SURGE PROTECTION DEVICE TYPE 1-2 3P+N

Lovato SA0B3NA320R is a 3P+N Type 1+2 monoblock surge protection device with 12.5 kA impulse current per pole, 320 V AC maximum continuous operating voltage and remote status signalling for three-phase electrical distribution systems.

SKU: SA0B3NA320R
Price
List Price £481.84 ex VAT
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£481.84
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Why Choose the Lovato SA0B3NA320R Type 1+2 Surge Protection Device?

The Lovato SA0B3NA320R is a high-performance Type 1+2 surge protection device (SPD) designed to protect three-phase AC electrical installations against transient overvoltages caused by direct and indirect lightning events and induced surges. As part of the Lovato Electric SA0B monoblock series, it combines Type 1 and Type 2 surge protection in a single compact device for installation in low-voltage distribution systems.

Designed for 3P+N electrical systems, the SA0B3NA320R provides an IEC impulse current Iimp of 12.5 kA per pole and a maximum discharge current Imax of 50 kA L-N. Its monoblock construction makes it particularly suitable for primary and intermediate distribution boards where robust surge protection and efficient use of panel space are important.

The SA0B3NA320R is suitable for 230/400 V AC three-phase systems and has a maximum continuous operating voltage Uc of 320 V AC. It also incorporates frontal operating/end-of-life indication and a remote changeover contact, allowing the SPD status to be monitored locally or remotely as part of an electrical control or building management system.

Key Advantages

  • Combined Type 1 and Type 2 surge protection in a monoblock device.
  • 3P+N configuration for three-phase electrical distribution systems with neutral.
  • 12.5 kA Iimp impulse current per pole for protection against high-energy lightning surges.
  • 50 kA maximum discharge current Imax on L-N paths.
  • Low <1.5 kV voltage protection level Up.
  • Integrated remote status contact and frontal operating/end-of-life indication.

Key Features

  • Lovato Electric SA0B monoblock series.
  • Type 1+2 surge protection device.
  • 3P+N pole configuration.
  • 230/400 V AC system application.
  • 320 V AC maximum continuous operating voltage Uc.
  • 12.5 kA Iimp (10/350 µs) impulse current.
  • 20 kA rated discharge current In (8/20 µs) L-N.
  • 50 kA maximum discharge current Imax (8/20 µs) L-N.
  • Integrated thermal protection.
  • Frontal status indication with remote changeover contact.
  • Compact four-module DIN rail mounting.

Reliable Protection Against Lightning and Transient Overvoltages

Surge protection devices such as the Lovato SA0B3NA320R divert damaging transient currents away from electrical equipment, helping limit the voltage reaching connected installations. Its combined Type 1+2 design provides protection against high-energy lightning currents as well as transient overvoltages caused by indirect lightning and switching events.

The SA0B monoblock series is designed for installations where coordinated surge protection is required within a compact electrical distribution system. With high impulse and discharge current capability, thermal protection and remote status signalling, the SA0B3NA320R provides dependable protection from the main distribution board through to downstream electrical equipment.

Typical Applications

  • Main three-phase electrical distribution boards.
  • Intermediate distribution panels.
  • Commercial and industrial electrical installations.
  • Buildings equipped with external lightning protection systems.
  • Installations exposed to direct or indirect lightning surges.
  • EV charging infrastructure and three-phase power distribution systems.

Technical Specifications

HS Code 85365080
Manufacturer Lovato Electric
Series SA0B
Model SA0B3NA320R
Product type Surge protection device (SPD)
SPD type / class Type 1+2
Application AC power lines
Pole configuration 3P+N
Rated system voltage 230/400 V AC
Maximum continuous operating voltage Uc 320 V AC
Impulse current Iimp (10/350 µs), L-N / N-PE 12.5 kA
Rated discharge current In (8/20 µs), L-N / N-PE 20 / 50 kA
Maximum discharge current Imax (8/20 µs), L-N / N-PE 50 / 100 kA
Total discharge current (10/350 µs) 100 kA
Voltage protection level Up, L-N / N-PE <1.5 / <1.5 kV
TOV withstand L-N, 5 s 334 V
TOV safe fail L-N, 120 min 438 V
TOV withstand N-PE, 200 ms 1,200 V / 300 A
Response time L-N / N-PE <25 / 100 ns
Maximum short-circuit current at 50 Hz 50 kA
Thermal protection Yes
Status indication Frontal operating / end-of-life indication
Remote status output Yes, changeover contact
Remote contact rating 3 A at 125 V AC; 0.5 A at 250 V AC
Number of DIN modules 4
Mounting type DIN rail
Maximum flexible conductor section 25 mm²
Maximum rigid conductor section 35 mm²
Protection rating IP20
Operating temperature -40 to +85 °C
Maximum altitude 2,000 m
Weight approx. 600 g
EAN 8013975233948
Standards IEC/EN/BS 61643-11
Device Type Surge protection device
SPD Type Type 1+2
Remote Signal Yes

Frequently Asked Questions

What is the Lovato SA0B3NA320R used for?

The SA0B3NA320R protects 3P+N three-phase AC electrical systems against transient overvoltages caused by direct and indirect lightning events and induced electrical surges.

Is the SA0B3NA320R a Type 1 or Type 2 surge protector?

It is a combined Type 1+2 surge protection device, providing both lightning current and transient overvoltage protection within a single monoblock unit.

What is the impulse current rating of the SA0B3NA320R?

The device has an IEC impulse current Iimp (10/350 µs) rating of 12.5 kA per pole.

Does the SA0B3NA320R provide remote status indication?

Yes. The SA0B3NA320R includes a remote changeover contact for signalling its operating status, together with frontal operating and end-of-life indication.

Where is the SA0B3NA320R typically installed?

The SPD is DIN rail mounted and is typically installed in main or intermediate electrical distribution boards protecting three-phase AC installations against lightning and transient overvoltages.

Trusted Surge Protection from Lovato Electric

Lovato Electric SA0B surge protection devices combine Type 1 and Type 2 protection in a robust monoblock format, providing high-energy surge protection, local status indication and remote monitoring for modern low-voltage electrical distribution systems.

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