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The LDSP1-40 series is designed for Type 2 SPD AC power protection against transient overvoltages caused by indirect lightning effects and electrical switching operations.
Its MOV voltage-limiting design provides an In rating of 20kA and an Imax rating of 40kA per protection path. The pluggable construction allows the protection module to be serviced without replacing the complete base assembly, subject to the installation instructions.
For buyers comparing an AC surge protector Type 2 SPD, the LDSP1-40 combines four Uc ratings, multiple protection modes, visual status indication and optional remote monitoring in a compact DIN-rail format.
Type 2 / T2 / Class II AC surge protection
In 20kA and Imax 40kA, 8/20μs
275Vac, 320Vac, 385Vac and 440Vac options
Pluggable MOV protection modules
Compact 18mm module width
Internal thermal disconnection device
Green/red operating and fault indication
Optional remote signalling contact
2+0, 4+0, 1+1 and 3+1 configurations
35mm DIN-rail installation
IP20 thermoplastic enclosure
Maximum backup fuse stated as 63A gG
Parameter | LDSP1-40 Series |
|---|---|
Product Type | Type 2 AC Surge Protective Device |
SPD Classification | Type 2 / T2 / Class II |
Protection Technology | Metal Oxide Varistor, MOV |
Product Structure | Pluggable design |
Nominal AC Operating Voltage, Un | 230Vac |
Maximum Continuous Operating Voltage, Uc | 275 / 320 / 385 / 440Vac |
Nominal Discharge Current, In | 20kA, 8/20μs |
Maximum Discharge Current, Imax | 40kA, 8/20μs |
Voltage Protection Level, Up | ≤1.5kV to ≤2.0kV, depending on model |
Short-Circuit Current Rating, Isccr | 25kA |
Thermal Disconnection Device | Internal; source table states “Insertion” |
Maximum Backup Fuse | 63A gG fuse |
Normal/Fault Indication | Green / Red |
Remote Signalling | Optional |
Remote Contact Rating | 250Vac / 0.5A; 30Vdc / 3A |
Maximum Remote-Signal Wire Size | 1.5mm² |
Main Terminal Capacity | 2.5–25mm² |
Wiring Method | Screw terminal; busbar wiring may be used |
Installation | 35mm DIN rail |
Operating Temperature | −40°C to +85°C |
Protection Degree | IP20 |
Enclosure Material | Thermoplastic material; supplied catalog states UL94-V0 |
Approximate Dimensions per Module | 73 × 18 × 65mm |
Standards Referenced in Supplied Catalog | IEC 61643-11, EN 61643-11, GB/T 18802.11 |
Catalog Model | Un | Uc | TOV, 5s | TOV, 120min | In | Imax | Up |
|---|---|---|---|---|---|---|---|
LDSP1-275 | 230Vac | 275Vac | 335Vac | 440Vac | 20kA | 40kA | ≤1.5kV |
LDSP1-320 | 230Vac | 320Vac | 335Vac | 440Vac | 20kA | 40kA | ≤1.6kV |
LDSP1-385 | 230Vac | 385Vac | 500Vac | 650Vac | 20kA | 40kA | ≤1.8kV |
LDSP1-440 | 230Vac | 440Vac | 580Vac | 770Vac | 20kA | 40kA | ≤2.0kV |
Select the Uc rating according to the maximum continuous voltage expected across the SPD terminals, the electrical network and the earthing arrangement. Final model selection should be confirmed against the project data and applicable installation requirements.
The LDSP1-40 is available in direct-to-PE and coordinated L-N/N-PE configurations. Use the complete ordering model to specify both the Uc rating and protection mode.
Model | Protection Mode | In | Imax Total | Up: L→PE | Up: L→N | Up: N→PE |
|---|---|---|---|---|---|---|
LDSP1-40-275/2+0 | L,N→PE | 20kA | 80kA | ≤1.5kV | / | ≤1.5kV |
LDSP1-40-275/4+0 | L,N→PE | 20kA | 160kA | ≤1.5kV | / | ≤1.5kV |
LDSP1-40-275/1+1 | L→N,N→PE | 20kA | 40kA | / | ≤1.5kV | ≤1.5kV |
LDSP1-40-275/3+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 |
LDSP1-40-320/4+0 | L,N→PE | 20kA | 160kA | ≤1.6kV | / | ≤1.5kV |
LDSP1-40-320/1+1 | L→N,N→PE | 20kA | 40kA | / | ≤1.6kV | ≤1.5kV |
LDSP1-40-320/3+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 |
LDSP1-40-385/4+0 | L,N→PE | 20kA | 160kA | ≤1.8kV | / | ≤1.5kV |
LDSP1-40-385/1+1 | L→N,N→PE | 20kA | 40kA | / | ≤1.8kV | ≤1.5kV |
LDSP1-40-385/3+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 |
LDSP1-40-440/4+0 | L,N→PE | 20kA | 160kA | ≤2.0kV | / | ≤1.5kV |
LDSP1-40-440/1+1 | L→N,N→PE | 20kA | 40kA | / | ≤2.0kV | ≤1.5kV |
LDSP1-40-440/3+1 | L→N,N→PE | 20kA | 40kA | / | ≤2.0kV | ≤1.5kV |
In is 20kA for each listed model.
The primary product rating is Imax 40kA per protection path.
Imax Total is retained exactly as stated in the supplied selection table.
The / symbol is retained from the source and means that no value is provided for that protection path.
Do not market the 4+0 configuration as a 160kA SPD; the series-level rating remains Imax 40kA per protection path.
The LDSP1-40 40kA Type 2 AC surge protective device is suitable for:
Low-voltage distribution boards
Sub-distribution panels
Commercial electrical panels
Industrial control cabinets
Machinery distribution panels
Building electrical systems
AC output distribution in solar installations
Equipment power-supply panels
This is an AC product and should not be used as a photovoltaic DC surge protective device.
YQNT supports OEM, ODM, and private-label production for electrical distributors, panel builders, electrical brands, and project suppliers.
Customization for the LDSP1-40 series may include:
Private-label logos and model markings
Customized rating labels and nameplates
Packaging, barcodes and instruction materials
Uc and protection-mode combinations
Optional remote-signalling configurations
Datasheets, catalogs and product documentation
Selected appearance options, subject to the confirmed product platform
For an accurate proposal, provide the system voltage, required Uc, protection mode, remote-signal requirement, target market, branding details and estimated quantity.
Yes. The LDSP1-40 is a Type 2 AC surge protective device with In 20kA and Imax 40kA. It is intended for low-voltage AC distribution systems.
The LDSP1-40 is a compact pluggable series rated at In 20kA and Imax 40kA. The LDSP1-100 is an integrated, higher-discharge-capacity series rated at In 50kA and Imax 100kA.
The supplied catalog lists 275Vac, 320Vac, 385Vac and 440Vac versions. The Uc rating must be selected according to the system voltage and earthing arrangement.
The series is available in 2+0, 4+0, 1+1 and 3+1 configurations. The correct mode depends on the phase arrangement and protection paths required by the installation.
Yes. The supplied product documentation describes the LDSP1-40 as a pluggable design. A replacement module must match the base, voltage rating and electrical specification.
Yes. An optional changeover contact is listed for remote status monitoring. The supplied contact rating is 250Vac/0.5A or 30Vdc/3A.
The supplied catalog states a maximum backup fuse of 63A gG. Final coordination must consider the installation and applicable electrical requirements.
Need a pluggable 40kA Type 2 SPD for a distribution-board or control-panel project?
Send us your system and purchasing requirements. We will confirm the suitable voltage model, protection mode, remote-signalling option, and available customization before quotation.
