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

Name: 40kA Imax Type 2 AC SPD | 20kA In 8/20μs Uc 275‑440V
Brand: Hongxi
SKU: 00251
Rating: 4.9 (176 reviews)

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.

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Describe Display
Specifications

Describe Display

The HS4 TYPE2 AC LDSP1‑40 series is a 20kA In, 40kA Imax Type 2 AC surge protector with thermal safety, fault display, and optional remote signaling, delivering reliable overvoltage protection for low‑voltage systems.

Type 2 AC surge protection device – designed for main distribution boards and sub‑distribution panels.
Nominal/Maximum discharge current: 20kA / 40kA (8/20μs).
Varistor voltage limiting technology – low residual voltage, fast response.
Pluggable design with internal thermal disconnection devices – safe and easy module replacement.
Operating/fault indication (green/red) and optional remote signal.
Conforms to IEC 61643‑11, EN 61643‑11, GB/T 18802.11.

Ideal for protecting power supplies in residential buildings, commercial complexes, data centers, and industrial control panels against induced lightning surges and switching overvoltages.

Normal Operating & Installation Conditions

Ambient Temperature: -40°C to +85°C (wide industrial range).
Relative Humidity: ≤95% (non‑condensing).
Altitude: ≤2000m (standard).
Pollution Degree: 2 (typical for protected indoor environments).
Installation Type: Fixed, 35mm DIN rail mounting required.
Minimum Wire Size: 2.5mm²; Maximum 25mm² (screw terminal/busbar compatible).
External Backup Protection: SCB or gG fuse rated ≤63A required to meet Isccr 25kA.
Earthing Systems: Compatible with TT, TN‑S, TN‑C‑S, and IT systems (with appropriate configuration).

Quality & Compliance

Certified to IEC 61643‑11 / EN 61643‑11 / GB/T 18802.11 – Class II surge protection for low‑voltage installations.
High discharge capacity: In 20kA / Imax 40kA (8/20μs) – robust protection against induced surges.
Integrated thermal disconnection – ensures safe failure mode, prevents fire hazard.
Pluggable module design – tool‑free replacement, no rewiring required.
Green/Red status indicator + optional remote signaling – easy monitoring and integration.
Low residual voltage – superior protection for sensitive IT equipment, PLCs, and power supplies.
RoHS-compliant, UL94‑V0 enclosure – environmentally friendly, flame‑retardant materials.
Manufactured under an ISO 9001:2015 quality management system.

Specifications

Key Electrical Specifications

Product Series	LDSP1‑40 – Type 2 Surge Protection Device
AC Operating Voltage (Un)	230Vac
Maximum Continuous Operating Voltage (Uc)	275Vac	320Vac	385Vac	440Vac
Temporary Overvoltage TOV‑5s (Ut)	335Vac	335Vac	500Vac	580Vac
Temporary Overvoltage TOV‑120min (disconnection)	440Vac	440Vac	650Vac	770Vac
Nominal Discharge Current (8/20μs) In	20kA
Maximum Discharge Current (8/20μs) Imax	40kA
Voltage Protection Level Up	≤1.5kV	≤1.6kV	≤1.8kV	≤2.0kV
Short‑circuit Current Rating (Isccr) with backup SCB or FUSE	25kA
Thermal Disconnection Device	Integrated
Max. Backup Fuse	63A gG Fuse

Mechanical & Installation Data

Wiring Method	Screw terminal 2.5‑25mm² (busbar wiring possible)
Normal/Fault Display	Green / Red
Remote Signal	Optional
Max Remote Signal Load Voltage/Current	250V/0.5A (AC), 30V/3A (DC)
Max Cross‑sectional Area Remote Signal Wire	1.5mm²
Installation	35mm DIN rail
Operating Temperature Range (Tu)	-40°C to +85°C
Protection Level	IP20
Enclosure Material	Thermoplastic, UL94‑V0

Pole Configuration Options & Total Discharge Capacity

Model (Uc)	Protection Mode	In per pole (kA)	Total Imax (kA)	Up (kV)
LDSP1‑40‑275	2+0 (L, N→PE)	20kA	80kA	≤1.5kV/≤1.5kV
	4+0 (L, N→PE)	20kA	160kA	≤1.5kV/≤1.5kV
	1+1 (L→N, N→PE)	20kA	40kA	≤1.5kV/≤1.5kV
	3+1 (L→N, N→PE)	20kA	40kA	≤1.5kV/≤1.5kV
LDSP1‑40‑320	2+0 (L, N→PE)	20kA	80kA	≤1.6kV/≤1.5kV
	4+0 (L, N→PE)	20kA	160kA	≤1.6kV/≤1.5kV
	1+1 (L→N, N→PE)	20kA	40kA	≤1.6kV/≤1.5kV
	3+1 (L→N, N→PE)	20kA	40kA	≤1.6kV/≤1.5kV
LDSP1‑40‑385	2+0 (L, N→PE)	20kA	80kA	≤1.8kV/≤1.5kV
	4+0 (L, N→PE)	20kA	160kA	≤1.8kV/≤1.5kV
	1+1 (L→N, N→PE)	20kA	40kA	≤1.8kV/≤1.5kV
	3+1 (L→N, N→PE)	20kA	40kA	≤1.8kV/≤1.5kV
LDSP1‑40‑440	2+0 (L, N→PE)	20kA	80kA	≤2.0kV/≤1.5kV
	4+0 (L, N→PE)	20kA	160kA	≤2.0kV/≤1.5kV
	1+1 (L→N, N→PE)	20kA	40kA	≤2.0kV/≤1.5kV
	3+1 (L→N, N→PE)	20kA	40kA	≤2.0kV/≤1.5kV

Note: All configurations support 35mm DIN rail mounting. Remote signaling and plug‑in modules are optional — consult our sales team for custom voltage or special assembly requirements.