275V AC 3P T2 SPD Residential Surge Protection Device | LKX-C40
1. Product Overview
The LKX-C40 is a Type 2 Surge Protective Device (SPD) designed for 275V AC, 3-phase power distribution systems. Built with high-duty MOV components, it provides reliable protection against transient overvoltages caused by switching operations, indirect lightning, and industrial electrical disturbances.
Ideal for industrial and commercial distribution cabinets, the LKX-C40 ensures safer operation of electrical equipment and supports OEM customization, making it suitable for system integrators, panel builders, and electrical solution providers.
2. Key Features & Benefits
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Type 2 SPD for AC low-voltage distribution systems
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Nominal discharge current (In): 20kA (8/20 μs)
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Maximum discharge current (Imax): 40kA (8/20 μs)
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Stable 275V AC operating voltage for 3-phase systems
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Pluggable module design for quick replacement & maintenance
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Visual status indicator (Green / Red) for real-time monitoring
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Optional remote signaling contact for system alarm integration
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Fast response time ≤25 ns, protecting sensitive equipment
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Made with UL94-V0 flame-retardant material
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DIN-rail mounting, ideal for OEM integration
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Suitable for industrial plants, commercial buildings, control panels
3. Applications
The LKX-C40 is designed for a wide range of industrial and commercial power distribution environments, including:
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Industrial distribution cabinets
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Commercial electrical switchboards
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Building power protection systems
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HVAC & automation control panels
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Low-voltage distribution networks
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OEM power system assemblies
4. Technical Specifications
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Technical Data |
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POLE |
2P/2+0,3p/3+0 |
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Technology |
MOV(Metal Oxide Varistors) |
GDT |
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Protection mode(s) |
L-PE/N-PE |
NPE |
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Nominal voltage (A.C.) [Un] |
220V |
300V |
380V |
400V |
225V |
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Max.continuous operating voltage (A.C.) [Ucpv] |
275V |
320V |
385V |
420V |
225V |
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Nominal discharge current(8/20μs) [In] |
20kA |
20kA |
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Max.discharge current (8/20μs) [lmax] |
40kA |
40kA |
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Protection level [Up] |
≤1.5kV |
≤1.6kV |
≤1.8kV |
≤2.0kV |
≤1.5kV |
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Response time [tA] |
≤25ns |
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Temporary overvoltage(TOV) withstand - 5 sec [Ut] |
335V |
440V |
440V |
620V |
335V |
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Admissible short-circuit current [lsccr] |
25kA |
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Max, backup fuse |
63AgL/Gg |
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📄 Mechanical Data Table
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Mechanical Data |
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Current |
AC system |
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SPD configuration |
Single/Three phase |
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Pluggable |
Available |
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Mounting |
35mm DlN rail |
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Housing material |
Thermoplastic,UL 94 V-O |
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Operating temperature |
-40℃...+80℃ |
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Protection rating |
IP20 |
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Remote Signaling |
Green/Red |
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Wiring for remote signaling |
Optional |
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Max.Voltage/Current for remote signaling |
Max 1.5mm solid/flexible |
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Standards compliance |
250V/0.1A;125V/0.2A;75V/0.5A |
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Certification |
CE, CB, RoHS,TUV |
5. Installation & Operating Conditions
For optimal safety and performance:
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Install on a 35mm DIN rail inside distribution cabinets
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Ensure correct wiring: L / N / PE for 3-phase AC systems
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Recommended to be installed by qualified electricians
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Use appropriate backup protection (e.g., 63A gG fuse)
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Ensure grounding resistance meets local electrical standards
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Operating temperature: –40°C to +80°C
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Indoor installation is recommended for stable performance
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Replace the pluggable protection module if the indicator turns red
This information helps ensure correct installation and builds professional trust for OEM clients.
6. Call to Action
Looking for a reliable OEM surge protection solution for industrial and commercial power systems?
Need custom branding, large-batch OEM, or technical support?
👉 Contact us today for quotations, samples, or OEM cooperation!
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