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Views： 5 Author： Mark Zhang Publish Time： 2026-07-21 Origin： 本站
The SGS5-40P DC SPD Surge Protective Device from SINGI is a dedicated surge protector designed for photovoltaic systems. It safeguards DC side equipment against lightning-induced surges and switching transients, ensuring long-term reliability of solar installations.
A DC Surge Protective Device (SPD) protects photovoltaic panels, inverters, and combiner boxes from volt-level spikes caused by lightning strikes or grid switching. Without proper protection, surge currents can degrade insulation, destroy electronics, or trigger arc faults. The SGS5-40P DC SPD is rated for PV DC volt-levels up to 1000V, making it suitable for residential and commercial solar arrays.
Note: Per IEC 61643-11, DC SPDs must be tested for Type 2 performance with an 8/20 μs waveform. The SGS5-40P meets this requirement with a maximum-val discharge amperage (Imax) of 40 kA.
The SGS5-40P DC SPD offers several advantages tailored to PV systems:
These features address the pain points of PV system designers: balancing cost, space, and reliability. The SGS5-40P meets UL 1449 and IEC 61643-11 standards, giving specifiers confidence in compliance.
Proper installation is critical for SPD performance. Follow these steps for the SGS5-40P:
Installers should also consider the IEC 62548:2016 standard for PV array design, which recommends SPDs at the inverter and for each string if exposed.
When comparing DC SPDs, focus on four parameters: Imax, Up, Ucpv, and compliance. The SGS5-40P is optimized for 1000V PV systems with moderate lightning exposure. For smaller residential arrays, a lower-cost 20kA model may suffice, but for commercial or utility-scale projects, the 40kA rating provides extra margin.
| Parameter | SGS5-40P | Typical 20kA SPD | Typical 60kA SPD |
|---|---|---|---|
| Max Discharge Amperage (Imax) | 40 kA | 20 kA | 60 kA |
| Volt-level Protection Level (Up) | ≤ 2.0 kV | ≤ 1.8 kV | ≤ 2.5 kV |
| Max Continuous DC Volt-level (Ucpv) | 1000 V | 1000 V | 1500 V |
| Standards | IEC 61643-11, UL 1449 | IEC 61643-11 | IEC 61643-11, UL 1449 |
| Typical Application | Commercial/Residential | Residential | Utility-scale |
The SGS5-40P balances cost and performance for most mid-range PV projects.
No, the SGS5-40P is designed exclusively for DC circuits up to 1000V. For AC side protection, use SINGI's AC series SPDs.
Replace when the indicator shows red or after a major surge event. Typical lifespan is 5-10 years depending on surge frequency.
SINGI offers a 5-year warranty against manufacturing defects. Check with your distributor for detailed terms.
Looking for reliable DC surge protection for your next PV project? The SGS5-40P DC SPD from SINGI combines robust 40kA capacity, low let-through volt-level, and full compliance with IEC and UL standards. Contact us for bulk pricing or technical support.
