



GSP9-C40 Surge Protective Device
GSP9-C40 Surge Protective Device (SPD) is a high-performance surge protection solution designed to protect low-voltage electrical systems and equipment from lightning surges and transient overvoltages.
Featuring T1+T2 (Class I+II) surge protection, a maximum discharge current of 40kA, and a fast response time of ≤25ns, the GSP9-C40 effectively reduces surge damage risks in power distribution systems, photovoltaic applications, industrial equipment, and commercial electrical installations. :contentReference[oaicite:1]{index=1}
With a pluggable modular design, visual status indication, and DIN rail installation, the GSP9-C40 provides reliable protection, easy maintenance, and flexible integration for modern electrical systems.
•High Surge Discharge Capacity: Supports up to 40kA maximum discharge current and 20kA nominal discharge current to effectively handle transient surge events.
•T1+T2 Combined Protection: Provides Class I+II surge protection for low-voltage electrical systems against lightning impulses and switching overvoltages.
•Fast Response Performance: With a response time of ≤25ns, the SPD quickly reacts to surge events and helps protect sensitive electrical equipment.
•Reliable Thermal Protection: Equipped with dual thermal disconnection devices to improve operational safety and provide reliable fault isolation.
•Pluggable Modular Design: Features replaceable modules for convenient maintenance and reduced system downtime.
•Visual Status Indicator: Green indicates normal operation while red indicates module failure and replacement is required.
•Flexible Installation Options: Available in 1P, 2P, 3P, 4P, 1P+N-PE, and 3P+N-PE configurations for different power distribution systems.
•DIN Rail Mounting Design: Supports standard 35mm DIN rail installation for easy integration into distribution panels.
•Remote Signaling Function: Optional remote alarm contacts allow real-time monitoring of SPD operating status.
•Wide Application Range: Suitable for power distribution systems, solar PV installations, industrial equipment, and commercial electrical protection applications.
Features
Application
This AC surge protective device is applied low voltage standard IEN/61643-11 to protect against AC power line system and other equipment from over voltage and instantaneous over voltage damage.It has advantages of large discharge current, fast respond time and low residual voltage.
Main Features
- High discharge capacity,quick response,pluggable.
- Fast response time ,din rail installation.
- Double thermal disconnection devices, providing more reliable protection.
- Green window means normal ,red means defect ,need to change module.
- Remote alarm terminal optional.
- Voltage can be customized.
Dimension Details

Technical Parameter
| Model | GSP9-C40 | ||
| Test standard | IEC/EN 61643-11;GB 18802.11 | ||
| SPD type | T1+T2/I+ IIC | ||
| Max. PV operating voltage(Uc) | 275V/1500V DC | ||
| Nominal discharge current(8/20μs) | 20KA | ||
| Max.discharge current(8/20μs) | 40kA | ||
| limp current(10/350μs) | 5kA | ||
| Voltage protection level Up | ≤1.5kV(275V AC) ≤1.8kV(275V AC) | ||
| Response time Ta | 25ns | ||
| Poles | 1P 2P 3P 4P 4P 1P+N-PE 3P+N-PE | ||
| Matched fuse or circuit breaker | 4mm²(L/N);6mm²(PE) | ||
| Connection wire specification | 35mm Din Rail | ||
| Mounting | 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 | ||
| Shell material | UL94-V0 fireproof material | ||





