LUNZO s.r.o. (Czechia) · info@lunzo.ie · +420 603 337 330 · Mon–Sun 8:00–17:00 Irish time · support in English · Contact Us

Menu Close
Empty basket
Your basket is currently empty.
Empty basket
0
Choose category
Home page Home page Hobbies & Garden Solar equipment Solar circuit breakers and protection
Home page

Price

Solar circuit breakers and protection

The safe operation of a photovoltaic system is ensured by protective devices that shield the panels, wiring, inverter and batteries from short circuits, overloads and overvoltage. These include direct-current (DC) circuit breakers, fuses and their holders, surge protectors and disconnectors for safely isolating the system. Solar circuit breakers and protection are chosen according to the voltage and current of the installation, and in photovoltaics it is essential that they are designed directly for direct current, which is harder to extinguish than alternating current.

Filter
Best Sellers
sort
Price: Low to High
Price: High to Low
28 products
Solar Miniature Circuit Breaker DC 2P 40 A 250 V 77 x 35 mm Photovoltaic MCB EACBDC-63 Overload and Short-Circuit Protection for Direct Current Installations Solar Miniature Circuit Breaker DC 2P 40 A 250 V 77 x 35 mm Photovoltaic MCB EACBDC-63 Overload and Short-Circuit Protection for Direct Current Installations
€15.24
Solar Miniature Circuit Breaker DC 2P 20 A 250 V 77 x 35 mm Photovoltaic MCB EACBDC-63 Overload and Short-Circuit Protection for Direct Current Circuits Solar Miniature Circuit Breaker DC 2P 20 A 250 V 77 x 35 mm Photovoltaic MCB EACBDC-63 Overload and Short-Circuit Protection for Direct Current Circuits
€23.10
Solar Miniature Circuit Breaker DC 2P 10 A 250 V 77 x 35 mm Photovoltaic MCB EACBDC-63 Overload and Short Circuit Protection for Direct Current Circuits Solar Miniature Circuit Breaker DC 2P 10 A 250 V 77 x 35 mm Photovoltaic MCB EACBDC-63 Overload and Short Circuit Protection for Direct Current Circuits
€19.17
Solar Miniature Circuit Breaker DC 2P 25 A 250 V 77 x 35 mm Photovoltaic MCB EACBDC-63 Overload and Short-Circuit Protection for Direct Current Circuits Solar Miniature Circuit Breaker DC 2P 25 A 250 V 77 x 35 mm Photovoltaic MCB EACBDC-63 Overload and Short-Circuit Protection for Direct Current Circuits
€25.28
Solar Miniature Circuit Breaker DC 2P 32 A 250 V 77 x 35 mm Photovoltaic MCB EACBDC-63 Overload and Short-Circuit Protection for Direct Current Installations Solar Miniature Circuit Breaker DC 2P 32 A 250 V 77 x 35 mm Photovoltaic MCB EACBDC-63 Overload and Short-Circuit Protection for Direct Current Installations
€24.85
Solar Miniature Circuit Breaker DC 2P 16 A 250 V 77 x 35 mm Photovoltaic MCB EACBDC-63 Protection Against Overload and Short Circuit for Direct Current Systems Solar Miniature Circuit Breaker DC 2P 16 A 250 V 77 x 35 mm Photovoltaic MCB EACBDC-63 Protection Against Overload and Short Circuit for Direct Current Systems
€17.42
Solar Miniature Circuit Breaker DC 2P 63 A 250 V 77 x 35 mm Photovoltaic MCB EACBDC-63 Protection Against Overload and Short Circuit for Direct Current Distribution Systems Solar Miniature Circuit Breaker DC 2P 63 A 250 V 77 x 35 mm Photovoltaic MCB EACBDC-63 Protection Against Overload and Short Circuit for Direct Current Distribution Systems
€20.92
TOMZN Solar Circuit Breaker MCCB 1P 250 A 43 x 165 x 80 mm Overload Protection Resistance up to 105 °C Safety Element for Photovoltaic PV Systems TOMZN Solar Circuit Breaker MCCB 1P 250 A 43 x 165 x 80 mm Overload Protection Resistance up to 105 °C Safety Element for Photovoltaic PV Systems
€67.21
Waterproof Circuit Breaker 100 A with Manual Reset 12-48 V Overload Protection Plastic and Metal Black for Car Radio Boat Caravan and Solar System Waterproof Circuit Breaker 100 A with Manual Reset 12-48 V Overload Protection Plastic and Metal Black for Car Radio Boat Caravan and Solar System
€27.90
Waterproof Circuit Breaker 200 A with Manual Reset 12-48 V Overload Protection Plastic and Metal Black for Car Radio Boat Caravan and Solar System Waterproof Circuit Breaker 200 A with Manual Reset 12-48 V Overload Protection Plastic and Metal Black for Car Radio Boat Caravan and Solar System
€24.41
Waterproof Circuit Breaker 50 A with Manual Reset 12-48 V Overload Protection Plastic and Metal Black for Car Radio Boat Caravan and Solar System Waterproof Circuit Breaker 50 A with Manual Reset 12-48 V Overload Protection Plastic and Metal Black for Car Radio Boat Caravan and Solar System
€25.28
Waterproof Circuit Breaker 60 A with Manual Reset 12-48 V Overload Protection Plastic and Metal Black for Car Radio Boat Caravan and Solar System Waterproof Circuit Breaker 60 A with Manual Reset 12-48 V Overload Protection Plastic and Metal Black for Car Radio Boat Caravan and Solar System
€30.96
Solar Miniature Circuit Breaker DC 2P 50 A 250 V 77 x 35 mm Photovoltaic MCB EACBDC-63 Power Protection Against Overload and Short Circuit for Direct Current Systems Solar Miniature Circuit Breaker DC 2P 50 A 250 V 77 x 35 mm Photovoltaic MCB EACBDC-63 Power Protection Against Overload and Short Circuit for Direct Current Systems
€22.66
DIN Rail Dual Automatic Power Switch ATS 4P 230 V AC 125 A for Solar PV Systems and Uninterruptible Power Inverters DIN Rail Dual Automatic Power Switch ATS 4P 230 V AC 125 A for Solar PV Systems and Uninterruptible Power Inverters
€84.67
Solar Miniature Circuit Breaker DC 2P 6 A 250 V 77 x 35 mm Photovoltaic MCB EACBDC-63 Overload and Short Circuit Protection for Direct Current Circuits Solar Miniature Circuit Breaker DC 2P 6 A 250 V 77 x 35 mm Photovoltaic MCB EACBDC-63 Overload and Short Circuit Protection for Direct Current Circuits
€19.17
TOMZN 2P DC 1000 V MCCB Solar Circuit Breaker 160 A 82 x 166 mm Pressed Case Overload Protection Safe Power Control for PV Systems TOMZN 2P DC 1000 V MCCB Solar Circuit Breaker 160 A 82 x 166 mm Pressed Case Overload Protection Safe Power Control for PV Systems
€85.98
TOMZN 2P DC 1000 V MCCB Solar Circuit Breaker 125 A 64 x 150 mm Overload Protection Moulded Case Safe Power Management for PV Systems TOMZN 2P DC 1000 V MCCB Solar Circuit Breaker 125 A 64 x 150 mm Overload Protection Moulded Case Safe Power Management for PV Systems
€68.08
Waterproof Circuit Breaker 70 A with Manual Reset 12-48 V Overload Protection Plastic and Metal Black for Car Radio Boat Caravan and Solar System Waterproof Circuit Breaker 70 A with Manual Reset 12-48 V Overload Protection Plastic and Metal Black for Car Radio Boat Caravan and Solar System
€23.97
2P Parallel DC Fuse Holder Set 37 x 79 mm 1000 V 32 A for Solar Photovoltaic Systems Basic PV Protection gpV 2P Parallel DC Fuse Holder Set 37 x 79 mm 1000 V 32 A for Solar Photovoltaic Systems Basic PV Protection gpV
€18.30
DC Fuse Holder 18 x 85.5 mm Single Pole 1000 V for Solar Photovoltaic Systems TOPV-30 High Voltage Protection FV gpV DC Fuse Holder 18 x 85.5 mm Single Pole 1000 V for Solar Photovoltaic Systems TOPV-30 High Voltage Protection FV gpV
€13.93
DC Fuse Holder 18 x 85.5 mm Single Pole with LED 1000 V for Solar Photovoltaic Systems TOMZN TOPV-30 High Voltage Base Protection FV gpV DC Fuse Holder 18 x 85.5 mm Single Pole with LED 1000 V for Solar Photovoltaic Systems TOMZN TOPV-30 High Voltage Base Protection FV gpV
€14.37
DC Fuse Holder 36 x 85.5 mm 2-Pole 1000 V for Solar Photovoltaic Systems TOMZN TOPV-30 High Voltage Base Protection FV gpV DC Fuse Holder 36 x 85.5 mm 2-Pole 1000 V for Solar Photovoltaic Systems TOMZN TOPV-30 High Voltage Base Protection FV gpV
€16.55
DC Fuse Holder 36 x 85.5 mm 2-Pole with LED 1000 V for Solar Photovoltaic Systems TOMZN TOPV-30 High Voltage Base Protection PV DC Fuse Holder 36 x 85.5 mm 2-Pole with LED 1000 V for Solar Photovoltaic Systems TOMZN TOPV-30 High Voltage Base Protection PV
€14.37
TOMZN Solar Circuit Breaker MCCB 2P 125 A 43 x 165 x 80 mm Overload Protection Resistance up to 105 °C Safety Element for Photovoltaic PV Systems TOMZN Solar Circuit Breaker MCCB 2P 125 A 43 x 165 x 80 mm Overload Protection Resistance up to 105 °C Safety Element for Photovoltaic PV Systems
€61.97
TOMZN Solar Circuit Breaker MCCB 2P 250 A 43 x 165 x 80 mm Overload Protection Resistance up to 105 °C Safe Power Management for PV Systems TOMZN Solar Circuit Breaker MCCB 2P 250 A 43 x 165 x 80 mm Overload Protection Resistance up to 105 °C Safe Power Management for PV Systems
€79.43
Waterproof Circuit Breaker 120 A with Manual Reset 12-48 V Overload Protection Plastic and Metal Black for Car Radio Boat Caravan and Solar System Waterproof Circuit Breaker 120 A with Manual Reset 12-48 V Overload Protection Plastic and Metal Black for Car Radio Boat Caravan and Solar System
€19.61
Waterproof Circuit Breaker 150 A with Manual Reset 12-48 V Overload Protection Plastic and Metal Black for Car Radio Boat Caravan and Solar System Waterproof Circuit Breaker 150 A with Manual Reset 12-48 V Overload Protection Plastic and Metal Black for Car Radio Boat Caravan and Solar System
€19.61
Waterproof Circuit Breaker 40 A with Manual Reset 12-48 V Overload Protection Plastic and Metal Black for Car Radio Boat Caravan and Solar System Waterproof Circuit Breaker 40 A with Manual Reset 12-48 V Overload Protection Plastic and Metal Black for Car Radio Boat Caravan and Solar System
€19.61

Solar circuit breakers and protection

A photovoltaic system works with high direct voltage and considerable currents, so a short circuit, overload or lightning strike can damage the components and even cause a fire. Protective devices limit these risks — they break the circuit in the event of a fault, divert overvoltage to earth and allow the system to be safely disconnected during maintenance. They form the quiet but indispensable layer of every reliable installation.

The range covers several groups. DC circuit breakers and fuses protect the cables and inverter against overcurrent and short circuits and break the circuit before overheating occurs. Surge protectors divert the voltage spikes that arise during a storm or switching and protect sensitive electronics. Disconnectors and load-break switches are used to isolate the panels from the rest of the system, both manually and for safety. The range often also includes fuse holders, busbars and accessories for DIN-rail mounting.

It is essential to choose components designed for direct current. A DC arc does not extinguish at the zero crossing as with alternating voltage, so DC breakers and fuses have a different design and a higher rated voltage, usually in the order of hundreds of volts. The choice is driven by the rated voltage and current matching the panel string, the breaking capacity and the number of poles; for surge protectors, additionally their type according to the required protection level.

Protective devices are placed on both the DC and the AC side of the system and are often combined in distribution boards. A well-designed set protects the investment in the panels and inverter, reduces the fire risk and makes inspections and maintenance easier. In larger installations, the protection is chosen in line with the design and applicable standards. Well-chosen solar circuit breakers and protection are therefore just as important as the production components themselves.