SUNTREE DC Protection Devices are designed to protect photovoltaic (PV) systems, batteries, DC distribution circuits, and other high-voltage DC applications against overcurrent, short circuits, electrical surges, and unsafe maintenance conditions.
This category includes PV DC fuses, DC circuit breakers, DC MCCBs, DC isolators, and DC surge protection devices (SPDs). Each product performs a different protection function, so the correct choice depends on the system voltage, current, and type of protection required.
| Product | Type | Main Function | Voltage / Current | Typical Application |
|---|---|---|---|---|
| SRD-50H | PV DC Fuse | Overcurrent & short-circuit protection | 1500V DC, 2A–50A | High-voltage PV systems |
| SRD-30 | PV DC Fuse | Overcurrent & short-circuit protection | 1100V DC, 1A–30A | PV strings and DC circuits |
| SISO-40 | DC Isolator | Safe DC circuit isolation | DC application | Solar panels and PV maintenance |
| SUP2H-PV | DC SPD | Surge & transient overvoltage protection | Up to 800V DC | PV systems and DC distribution |
| SUP2H1-PV | DC SPD | Surge & transient overvoltage protection | Up to 1200V DC | High-voltage PV systems |
| SL7N-63 | DC Circuit Breaker | Overload & short-circuit protection | 550–1000V DC, 6A–63A | PV and DC distribution circuits |
| SM8 HPV | DC MCCB | High-current overcurrent & short-circuit protection | Up to 1500V DC, 100A–630A | Large PV and industrial DC systems |
| Device | What It Protects Against | How It Works | Where It Is Used |
| SRD-50H PV Fuse | Overcurrent & short circuit | Fuse element interrupts excessive current | 1500V PV strings and high-voltage solar systems |
| SRD-30 PV Fuse | Overcurrent & short circuit | Disconnects the circuit when current exceeds the fuse rating | PV strings and DC combiner boxes |
| SISO-40 DC Isolator | Unsafe energized circuits during maintenance | Provides manual isolation of a DC circuit | Solar arrays, PV systems and DC equipment |
| SUP2H-PV SPD | Voltage surges | Diverts transient surge energy away from protected equipment | PV strings and DC distribution |
| SUP2H1-PV SPD | High-voltage surges | Provides Type 2 surge protection for DC systems | High-voltage PV installations |
| SL7N-63 DC Circuit Breaker | Overload & short circuit | Automatically trips when abnormal current is detected | PV and DC distribution circuits |
| SM8 HPV DC MCCB | High-current overload & short circuit | Interrupts high fault currents in larger DC systems | Large-scale PV and industrial DC applications |
Choose the SUNTREE SRD-30 or SRD-50H PV DC Fuse when you need string-level overcurrent and short-circuit protection in a photovoltaic system. The SRD-30 is rated up to 1100V DC, while the SRD-50H is designed for systems up to 1500V DC.
Choose the SUNTREE SISO-40 DC Isolator when you need to manually isolate a DC circuit for maintenance, inspection, or emergency shutdown.
Choose the SUNTREE SUP2H-PV or SUP2H1-PV DC SPD when the system requires protection against transient overvoltage and electrical surges. The SUP2H-PV is available for lower-voltage PV applications, while the SUP2H1-PV supports higher-voltage DC systems.
Choose the SUNTREE SL7N-63 DC Circuit Breaker for 6A–63A DC circuits where automatic overload and short-circuit protection is required.
For high-current PV and industrial DC systems, the SUNTREE SM8 HPV DC MCCB is the appropriate solution, supporting applications up to 1500V DC and 630A.
SUNTREE DC protection products can be used in:
For a complete PV protection system, different devices can be used together. For example, a DC fuse or circuit breaker provides overcurrent protection, a DC SPD protects against voltage surges, and a DC isolator allows the circuit to be safely disconnected for maintenance.
The correct combination should always be selected according to the maximum DC voltage, operating current, short-circuit current, number of strings, and system configuration.
DC protection devices are electrical components designed to protect direct-current circuits against overcurrent, short circuits, voltage surges, and unsafe operating conditions. They are widely used in photovoltaic and battery systems.
A PV DC fuse uses a fuse element that melts and interrupts the circuit when excessive current occurs. A DC circuit breaker automatically trips and can generally be reset after the fault has been cleared.
A DC isolator is used to manually disconnect a DC circuit from its power source. It is particularly useful for safely isolating PV circuits during maintenance and servicing.
Both are Type 2 DC Surge Protection Devices, but they are designed for different voltage levels and pole configurations. The SUP2H-PV is a 2P SPD for applications up to 800V DC, while the SUP2H1-PV is a 3P SPD designed for higher-voltage applications up to 1200V DC.
For a 1500V PV system, the SUNTREE SRD-50H PV DC Fuse and SUNTREE SM8 HPV DC MCCB are among the suitable products in this category, depending on the required current and protection arrangement.
What are DC Protection Devices?
What is the difference between a PV fuse and a DC circuit breaker?
What is a DC isolator used for?
What is the difference between SUP2H-PV and SUP2H1-PV?
Which DC protection device is suitable for a 1500V solar system?
