EXPD DC Surge Protector 1500V 40kA
EXPD DC Surge Protector is designed for photovoltaic DC systems up to 1500VDC with 40kA maximum discharge current. Built with high-energy MOV technology and nanosecond response, it protects PV combiner boxes, inverters, controllers, and DC distribution systems from lightning-induced surges.
Rated Voltage: 500V – 1500V DC
Max Discharge Current: 40kA
Protection Level: 2.4kV
Response Time: ≤25ns
Protection Mode: DC+ / DC- / PE
Mounting: 35mm DIN Rail
Product Information
high-Performance photovoltaic dc surge protector: expd Series dc Spd up to 1500v 40ka
The expd DACS SPD has become very popular in the PV industry by being installed into combiner boxes, inverters, DC controllers, and/or DC distribution cabinets of photovoltaic DC electrical systems.
It is designed for a DC electrical system with a continuous maximum operating voltage rating at 500V-1500V DC and continuous maximum discharge rating at 40kA.
The EXPD uses high-energy MOV technology to provide response times of less than a nanosecond for protection against both lightning induced surges and switching induced surges.
Technical Data
| Parameter | EXPD Series DC SPD |
|---|---|
| Model Range | EXPD-500 / 600 / 800 / 1000 / 1200 / 1500 |
| Nominal Discharge Current (In) | 20kA |
| Maximum Discharge Current (Imax) | 40kA |
| Voltage Protection Level (Up) | 2.4kV |
| Response Time | ≤25ns |
| Protection Class | IP20 |
| Enclosure Material | PBT / PA66 |
| Failure Indication | Visual indicator (green/red) |
| Ambient Temperature | -40°C to +80°C |
| Protection Mode | DC+ / DC- / PE |
| Mounting | 35mm DIN rail |
| Cable Cross Section | 16–35mm² flexible conductor |
| Standards | IEC 61643-1 / GB18802.1 / GB50057 |
The EXPD DC SPD is designed for installation in photovoltaic combiner boxes, inverter DC inputs, controllers, and DC distribution cabinets. It provides fast surge diversion within nanoseconds to protect sensitive PV electronics.
The device is installed on standard 35mm DIN rail systems and supports both single-core and multi-core copper conductors for flexible installation.
OEM/ODM Supply – Certified PV Surge Protection Manufacturer
EXPD – Industrial Grade DC Surge Protection for Global PV Systems
Designed to afford high reliability in Photovoltaic protection applications, the EXPD series DC SPD features a replaceable modular design, fast fault response time, and IEC compliant surge protection capabilities, thus providing long term reliability of PV Power Systems.
This product is widely used by solar EPC contractors, combiner box manufacturers, and inverter integrators requiring certified surge protection components with OEM/ODM customization capability.
How to Select a DC SPD for PV Systems
Key technical selection criteria for EXPD photovoltaic surge protection devices.
1. Voltage Selection (500V–1500V)
Match SPD voltage rating with PV string Voc under worst-case conditions.
2. Surge Capacity Selection
20kA In / 40kA Imax ensures protection for lightning-prone environments.
3. Installation Location
Install near inverter DC input or combiner box for optimal protection.
4. Wiring Requirements
Keep grounding and wiring as short as possible to reduce surge impedance.
Commonly Asked Questions
What does EXPD DC SPD mean?
A photovoltaic surge protection device that protects DC systems from lightning and other types of surges caused by switches.
Where can I find EXPD?
Within PV combiner boxes, as well as inverter DC inputs and DC panels.
What standards are met/exceeded?
IEC 61643-1, GB18802.1, and GB50057 standards.
Will it work for 1500V systems?
Absolutely, this device is designed to support PV Systems up to 1500V DC.
