
GSP9-C40PV 1500V DC Surge Protective Device
GSP9-C40PV 1500V DC Surge Protective Device is a high-performance PV DC SPD designed to protect solar photovoltaic systems from lightning surges and transient overvoltages.
With T1+T2 (Class I+II) surge protection technology, a maximum discharge current of 40kA, and a fast response time of ≤25ns, the GSP9-C40PV provides reliable protection for photovoltaic combiner boxes, solar inverters, and DC distribution cabinets.
Featuring a pluggable modular design, double thermal disconnection protection, and 35mm DIN rail installation, it delivers safe, efficient, and easy-to-maintain surge protection for modern solar energy systems.
•High Voltage PV Protection: Designed for 1500V DC photovoltaic systems, providing reliable surge protection for modern high-voltage solar installations.
•T1+T2 Surge Protection: Combines Class I and Class II surge protection to handle lightning impulses and transient overvoltage events.
•High Discharge Capacity: Supports 20kA nominal discharge current and 40kA maximum discharge current to effectively absorb surge energy.
•Fast Response Performance: Provides a response time of ≤25ns to quickly limit dangerous voltage spikes and protect sensitive DC equipment.
•Reliable Thermal Protection: Equipped with double thermal disconnection devices to improve safety and ensure reliable fault isolation.
•Pluggable Modular Design: Features replaceable modules for easier maintenance and reduced system downtime.
•PV System Compatibility: Suitable for photovoltaic combiner boxes, solar inverters, DC distribution cabinets, and other solar DC applications.
•DIN Rail Installation: Supports standard 35mm DIN rail mounting for quick and convenient installation in electrical cabinets.
•Visual Status Indicator: Green indicator shows normal operation, while red indicates module failure and replacement requirement.
•Optional Remote Monitoring: Supports optional remote alarm terminals for real-time SPD status monitoring.
Features
Application
This DC surge protective device is applied low voltage standard IEC/EN 61643-11 to protect against DC power line system and other equipment from over voltage and instantaneous over voltage damage. Widely used in photovoltaic comber box, power inverter, DC distribution cabinet etc. It has advantages of large discharge current, fast respond time, low residual voltage. Max. PV voltage up to UCPV ≤1000V DC.
Main Features
- High discharge capacity, quick response, module pluggable;
- Fast response time, din rail installation;
- Double thermal disconnection devices, provide more reliable protection;
- Green window means normal, red means defect, need to change module;
- Remote alarm terminal optional.
- T1+T2 surge protection.
Dimension Details (Remote terminal optional) Unit: mm

Wiring Diagram (2P&3P)

Technical Parameter
| Model | GSP9-C40PV | ||
| Test standard | IEC/EN 61643-11;GB 18802.11 | ||
| SPD type | T1+T2/I+ IIC | ||
| Max. PV operating voltage(Uc) | 1500V DC | ||
| Nominal discharge current(8/20μs) | 20KA | ||
| Max.discharge current(8/20μs) | 40kA | ||
| limp current(10/350μs) | 6.25kA | ||
| Poles | 3P | ||
| Voltage protection level Up PV | ≤5.6kV | ||
| Response time Ta | 25ns | ||
| Connection wire specification | 4mm²(L/N);6mm²(PE) | ||
| Mounting | 35mm Din Rail | ||
| Matched fuse or circuit breaker | 32A | ||
| Type of remote signaling contact(Optional) | C+NC:Normally closed C+NO:Normally open C:Common contact | ||
| Max.Voltage/Current for remote signaling | 1A/2A/3A 125V AC | ||
| Wiring for remote signaling | 1.5mm² max. | ||
| Operating temperature | -40°C to +85°C | ||





