/12.5kA Iimp Type 1+2 SPD
HS1 TYPE1+2 AC LDSP1s12.5
12.5kA Iimp Type 1+2 SPD | 230Vac Uc 275-440V | HS1 Surge Arrester

The HS1 Type 1+2 AC Surge Protective Device delivers combined lightning and surge protection for low‑voltage AC systems. With an impulse discharge current (Iimp) of 12.5kA (10/350µs), a maximum discharge current (Imax) of 50kA (8/20µs), and a rapid response time ≤25ns, it is engineered for high‑exposure environments. Compliant with IEC 61643‑11 and available in five flexible pole configurations (2+0, 3+0, 4+0, 1+1, 3+1).

/HS2 TYPE1+2 AC LDSP1s7 Surge Protective Device
HS2 TYPE1+2 AC LDSP1s7
7kA Iimp Type 1+2 AC SPD | 20kA In 50kA Imax Plug‑in Modular

The HS2 Type 1+2 AC Surge Protective Device is a combined lightning and surge arrester compliant with IEC/EN standards. With Iimp 7kA (10/350µs), In 20kA, and Imax up to 50kA (8/20µs), it features a plug‑in modular design, built‑in thermal disconnection, visual green/red status indication, and optional remote signaling. Built‑in safety fuse and DIN‑rail mounting make it ideal for low‑voltage distribution systems in buildings, industrial plants, and data centers.

/HS3 TYPE2 Surge Protective Device
HS3 TYPE2 LDSP1-120
120kA Imax Type 2 AC SPD | 60kA In 8/20μs Uc 275‑440V

The HS3 Type 2 AC Surge Protective Device (SPD) is a high‑performance surge arrester engineered for low‑voltage power distribution systems. With Imax 120kA (8/20μs), In 60kA, and Uc options from 275V to 440V, it features integrated thermal disconnection, red fault display, optional remote signaling, and 35mm DIN‑rail mounting. Compliant with IEC 61643‑11, it is ideal for industrial plants, commercial buildings, data centers, and critical infrastructure requiring robust Type 2 surge protection.

/HS4 TYPE2 AC LDSP1-40 Surge Protective Device
HS4 TYPE2 AC LDSP1-40
40kA Imax Type 2 AC SPD | 20kA In 8/20μs Uc 275‑440V

The HS4 Type 2 AC Surge Protective Device (SPD) is a high‑performance surge arrester for low‑voltage power distribution systems. With Imax 40kA (8/20μs), In 20kA, and Uc options from 275V to 440V, it utilizes varistor voltage‑limiting technology for low residual voltage. Features include pluggable design, internal thermal disconnection, green/red status indication, and optional remote signaling. Compliant with IEC 61643‑11 / EN 61643‑11, it is ideal for protecting sensitive electronic equipment in residential, commercial, and light industrial installations.

Select Your Surge Protective Device

Type 1+2 and Type 2 SPDs available, with impulse discharge current (10/350μs) from 7kA to 12.5kA. Nominal discharge current (8/20μs) up to 60kA, max. discharge current up to 120kA. Protects low-voltage AC systems from lightning and surge damage.

  • High Discharge Capacity (Up to 120kA Imax)
  •  Type 1+2 / Type 2 Options
  •  Thermal Disconnection & Fault Indication
  • Modular, DIN Rail Mount

Surge Protective Device Parameter Overview

Model Type Uc (Vac) In (8/20μs) Imax (8/20μs) Imp (10/350μs) Up (kV) Poles Configuration
HS1-12.5-275 1+2 275 20kA 50kA 12.5kA ≤1.5 1P,2P,3P,4P,1+1,3+1
HS2-7-275 1+2 275 20kA 50kA 7kA ≤1.5 1P,2P,3P,4P,1+1,3+1
HS3-120-275 2 275 60kA 120kA - ≤2.0 1P,2P,3P,4P,1+1,3+1
HS4-40-275 2 275 20kA 40kA - ≤1.5 2P,4P,1+1,3+1
Quality testing and certification

Quality You Can Rely On

Our SPDs comply with IEC 61643-11 and EN 61643-11 standards. Partner factories are ISO9001 certified, and every unit is tested for residual voltage, response time, and thermal stability before shipment.

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Regarding the Q&A on Surge Protective Device
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What is the difference between Type 1+2 and Type 2 SPD?

Type 1+2 (HS1, HS2) is installed at the main incoming panel, especially if the building has a lightning protection system or is in a high-lightning area. Type 2 (HS3, HS4) is installed in sub-distribution boards to protect sensitive equipment from switching and indirect lightning surges.

Do I need an external backup fuse for the HS series SPD?

Yes, always install a backup fuse (e.g., 125A gG for HS3) between the main breaker and the SPD. This protects the SPD and the installation in case of a short-circuit failure of the SPD itself.

How do I know if my SPD has failed?

The HS series SPD has a green/red mechanical indicator on the front. Green means OK. Red means the internal thermal disconnection has activated, and the module must be replaced. Some models also offer remote signaling contacts for panel alarms.

Can I use a 275V SPD on a 400V system?

No. Match the SPD’s maximum continuous operating voltage (Uc) to your system voltage. For a 230/400V system (phase-to-neutral 230V, phase-to-phase 400V), choose a 275V Uc SPD for L-N protection and 440V Uc for L-L or L-PE protection.

What is the meaning of “1+1” or “3+1” configuration?

These refer to the protection mode. “1+1” means one L-N MOV plus one N-PE spark gap (for TT systems). “3+1” means three L-N MOVs plus one N-PE spark gap (for TN-C-S or TT systems). Contact us with your system earthing arrangement (TN, TT, IT) for a specific recommendation.

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