The SUNTREE Electric Group Co., Ltd SRD-30 DC Fuse is a thermal DC fuse and holder assembly specifically engineered to protect photovoltaic (PV) systems from overcurrent and fault conditions. It is widely used in DC combiner boxes, solar inverters, and DC distribution panels of solar installations to ensure safety, reliability, and compliance with international electrical standards.

Features & Benefits

High-Voltage DC Protection : Safely handles up to 1100 V DC, ideal for residential, commercial, and industrial PV arrays.
Thermal Fuse Technology : Rapidly interrupts overcurrent or short-circuit conditions to prevent damage to PV panels and downstream components.
Wide Current Range : Available in 1 A to 30 A, compatible with various PV string sizes and inverter systems.
Quick Replacement Design : Plug-in fuse holder allows easy maintenance and fast replacement without tools.
Fault Indicator (Optional) : Some models feature a visible window to quickly identify blown fuses, reducing downtime.
DIN-Rail Mountable : Easy integration into DC combiner boxes, distribution panels, or retrofitted systems.
Certified Safety Standards : Complies with CE, IEC, and TUV certifications, ensuring reliability and global safety compliance.
Compact & Durable Construction : Robust build suitable for harsh indoor environments, ensuring long-term protection.
Protects Entire DC Circuit : Prevents overload and short-circuits from damaging inverters, controllers, or other electrical components.

Use Cases

Solar DC Combiner Boxes : Protects individual PV strings, isolating faults without shutting down the entire array.
Solar Inverters & Controllers : Safeguards sensitive inverter components from overloads and short circuits.
Off-Grid & Hybrid Solar Systems : Ensures reliable protection in standalone or hybrid setups with batteries and solar panels.
Rooftop & Commercial Installations : Maintains operational continuity for residential, commercial, and industrial PV arrays.
Telecom & Remote Power Sites : Provides critical DC circuit protection for remote solar-powered equipment.
Retrofit & Maintenance Projects : Easily integrates into existing PV systems for upgrades or replacements.
Industrial PV Arrays : Suitable for high-capacity solar installations requiring robust DC overcurrent protection.

Value Propositions

Enhanced Solar System Safety : Protects PV panels, inverters, and DC circuits from overloads and short circuits.
Reliable Performance : Thermal fuse design ensures fast and precise interruption during fault conditions.
Versatile Compatibility : Suitable for a wide range of PV string sizes and system voltages up to 1100 V DC.
Easy Installation & Maintenance : DIN-rail mountable and plug-in fuse design for quick replacement and minimal downtime.
Cost-Effective Protection : Prevents costly damage to expensive PV components, extending system lifespan.
Globally Certified Quality : CE, IEC, and TUV approvals provide confidence in international safety and performance standards.
Durable & Robust Design : Built to withstand indoor environmental conditions and long-term operation.
Supports Continuous Operation : Minimises downtime by isolating faulted circuits without affecting the entire system.

Local Market Positioning in Tanzania

Ideal for Growing Solar Adoption : Supports Tanzania’s increasing use of residential, commercial, and off-grid solar PV systems.
Reliable Protection for Harsh Environments : Designed to withstand local temperature variations and indoor installation conditions.
Compatible with Local PV Systems : Fits standard DC combiner boxes and inverters commonly used in Tanzanian solar projects.
Reduces Maintenance Costs : Easy-to-replace fuse holders minimise downtime and service labour for local technicians.
Supports Off-Grid & Remote Installations : Perfect for rural areas and telecom sites where reliable DC protection is critical.
Certified & Trusted Quality : CE, IEC, and TUV certifications provide assurance to local installers and procurement teams.
Enhances System Longevity : Prevents damage to PV panels, inverters, and batteries, increasing ROI for local solar projects.
Flexible for Residential & Commercial Use : Suitable for rooftop systems, commercial solar farms, and hybrid solar setups.

Technical Specification

Specification	Details
Product Name	SUNTREE SRD-30 DC Fuse Thermal Electrical Fuse Holder
Rated Voltage	1100 V DC
Rated Current	1 A – 30 A (various options available)
Short-Circuit Breaking Capacity	Up to 33 kA
Pole Configuration	Single Pole (1P)
Mounting Type	DIN-Rail (TH35-7.5)
Operating Temperature	-30 °C to +70 °C
Protection Degree	IP20
Material	High-quality insulating plastic and metal components
Applications	PV Combiner Boxes, Inverters, Off-Grid Systems, Commercial & Industrial PV
Protection Class	IP20
Fault Indicator	Optional (visible window for blown fuse detection)