Select the SPD configuration according to the photovoltaic DC system voltage, required pole arrangement and surge-protection design. Pole count alone does not determine whether a configuration is suitable; the DC circuit topology, grounding arrangement and manufacturer wiring diagram should also be checked before installation.
DC SPD
1000V DC Type 2 Surge Protective Device, 1P–4P – UH-DG-SP01
Model UH-DG-SP01
UH-DG-SP01 is a Type 2 DC surge protective device designed to limit transient overvoltages on the DC side of photovoltaic systems. The 1000V DC platform is available in 1P, 2P, 3P and 4P configurations 20kA and 40kA discharge-current options, DIN-rail mounting and a 2.4kV protection level.
- Type 2 DC Protection
- 20kA / 40kA Options
- 1P to 4P
SPD Type
Type 2 / T2
Main Operating Voltage Uc
1000V DC
Pole Options
1P / 2P / 3P / 4P
Discharge Current
20kA / 40kA
Protection Level
2.4kV
Response Time
25 ns
Select the SPD voltage and pole configuration according to the PV DC circuit and use the specified wiring and protective-earth connection.
Overview
Product Overview
UH-DG-SP01 is a Type 2 DC surge protective device developed for transient-overvoltage protection on the DC side of photovoltaic installations. The modular SPD-40 platform supports 1P, 2P, 3P and 4P configurations, allowing the pole arrangement to be selected according to the PV DC circuit and protection architecture.
The main UHCCY configuration is rated for 1000V DC and is available with supplier-listed 20kA and 40kA discharge-current options. A DIN-rail modular housing, fast response and removable protection modules make the device suitable for PV combiner boxes, inverter-side DC protection and related solar distribution assemblies.
Features
Key Product Features
Type 2 DC Protection
20kA / 40kA Options
1P to 4P
Type 2 PV Surge Protection
UH-DG-SP01 is designed as a Type 2 surge protective device for limiting transient overvoltages on photovoltaic DC circuits.
1000V DC Platform
The primary UHCCY configuration supports photovoltaic DC systems requiring a 1000V DC SPD platform.
Four Pole Configurations
The SP01-40 family is available in 1P, 2P, 3P and 4P versions for different DC protection layouts and equipment configurations.
20kA / 40kA Options
The supplier offers 20kA and 40kA discharge-current configurations within the SPD-40 family.
Fast Surge Response
The supplier specifies a response time of approximately 25 ns for the SPD-40 platform.
Modular DIN-Rail Construction
The modular housing is designed for standard DIN-rail installation inside PV combiner boxes, inverter protection panels and DC distribution enclosures.
Technical Data
Technical Specifications
Review the complete technical parameters for product selection and project verification.
Electrical Characteristics
| Parameter | Value |
|---|---|
| SPD Type | Type 2 / T2 |
| Main Operating Voltage Uc | 1000V DC |
| Pole Options | 1P / 2P / 3P / 4P |
| Discharge Current | 20kA / 40kA |
| Protection Level | 2.4kV |
| Response Time | 25 ns |
| Application | PV DC Surge Protection |
Materials & Construction
| Parameter | Value |
|---|---|
| Housing Material | PA66 Flame-Retardant Engineering Plastic, supplier stated |
| Conductive Material | Copper, supplier stated |
| Construction | Modular SPD |
| Installation | DIN Rail |
Additional Electrical Data
| Parameter | Value |
|---|---|
| Leakage Current | ≤20 μA, supplier listed |
| Response Time | 25 ns |
| Voltage Configuration | 1000V DC main version |
Selection
Choose the Correct UH-DG-SP01 Configuration
| Model | Poles | Main Voltage | Type | Discharge Current Options |
|---|---|---|---|---|
| UH-DG-SP01-1P | 1P | 1000V DC | T2 | 20 / 40kA |
| UH-DG-SP01-2P | 2P | 1000V DC | T2 | 20 / 40kA |
| UH-DG-SP01-3P | 3P | 1000V DC | T2 | 20 / 40kA |
| UH-DG-SP01-4P | 4P | 1000V DC | T2 | 20 / 40kA |
Applications
Where This Product Is Used
Solar PV Systems
Protection, connectivity and distribution components for photovoltaic arrays, string circuits and related solar DC systems.
UH-DG-SP01 is intended for photovoltaic DC systems requiring protection against transient overvoltages caused by lightning-related effects and switching disturbances. Typical applications include PV combiner boxes, DC distribution panels, inverter DC inputs and commercial or utility-scale solar arrays. SPD selection should be coordinated with the system voltage, earthing arrangement and overall lightning and surge protection concept.
Installation
Installation Guidance
1. Confirm that the selected UH-DG-SP01 voltage rating and pole configuration are suitable for the photovoltaic DC system before installation.
2. Fully isolate the photovoltaic array and DC circuit before installing or servicing the surge protective device.
3. Mount UH-DG-SP01 securely on the DIN rail inside the PV combiner box, DC distribution panel or inverter protection enclosure.
4. Connect the DC conductors and protective-earth connection strictly according to the wiring diagram for the selected 1P, 2P, 3P or 4P configuration.
5. Keep the SPD connection conductors as short and direct as practical to minimize additional inductive voltage during surge discharge.
6. Coordinate the SPD with the required upstream protective device and the overall DC surge-protection design.
7. Verify conductor polarity, terminal tightness, protective-earth continuity and module seating before energizing the photovoltaic system.
8. Inspect the SPD status regularly and replace any failed or end-of-life protection module according to the product instructions.
9. UH-DG-SP01 provides transient overvoltage protection only. It does not replace DC circuit breakers, fuses or isolators required for overcurrent and isolation functions.
10. Installation and maintenance should be performed by qualified electrical personnel in accordance with the applicable photovoltaic system requirements.
Important Notes
Select the SPD voltage and pole configuration according to the PV DC circuit and use the specified wiring and protective-earth connection.
FAQ
Frequently Asked Questions
What is UH-DG-SP01 used for?
UH-DG-SP01 is a Type 2 DC surge protective device designed to limit transient overvoltages on photovoltaic DC circuits and divert surge current through the system's surge-protection path.
Which pole configurations are available?
UH-DG-SP01 is available in 1P, 2P, 3P and 4P configurations based on the LONG TAI SPD-40 product platform.
What voltage is UH-DG-SP01 rated for?
The main UHCCY configuration is specified for 1000V DC photovoltaic systems. The supplier also lists 500V DC configurations for parts of the SPD-40 family, which can be treated as project-specific options when required.
Is the SPD rated 20kA or 40kA?
The supplier lists 20kA and 40kA discharge-current configurations. UHCCY should distinguish the exact In and Imax values only after the corresponding technical datasheet or product marking for the selected configuration is confirmed.
What does Type 2 mean?
Type 2 identifies an SPD tested for protection against transient surge currents typically associated with induced lightning effects and switching overvoltages. For photovoltaic DC applications, the applicable product requirements are addressed by IEC 61643-31.
What is the protection level?
The supplier lists a 2.4kV protection level for the SPD-40 platform. The exact value for the ordered voltage and pole configuration should be verified against the final product marking or datasheet.
Does UH-DG-SP01 replace a DC fuse or circuit breaker?
No. A surge protective device limits transient overvoltage and diverts surge current. DC fuses and circuit breakers perform different overcurrent-protection functions and should be selected separately as required by the PV system design.
Can UH-DG-SP01 be used in a PV combiner box?
Yes. PV combiner boxes are one of the intended applications for this type of DC SPD, provided its voltage, pole configuration and surge-protection parameters match the complete photovoltaic system design.
Need More Information About This Product?
Contact UHCCY for technical details, product selection, samples, pricing, and OEM/ODM requirements.