In the most basic sense, when a transient voltage occurs on the protected circuit, an DC SPD limits the transient voltage and diverts the current back to its source or ground.
To work, there must be at least one non-linear component of the DC SPD, which under different conditions transitions between a high and low impedance state.
At normal operating voltages, the DC SPDs are in a high-impedance state and do not affect the system. When a transient voltage occurs on the circuit, the DC SPD moves into a state of conduction (or low impedance) and diverts the surge current back to its source or ground. This limits or clamps the voltage to a safer level. After the transient is diverted, the DC SPD automatically resets back to its high-impedance state.

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Product Description

China DC SPD(Surge Protective Device) Factory
DC SPD(Surge Protective Device)supplier, protect against lightning surge voltages in solar system (photovoltaic power supply system).
These units must be installed in parallel on the DC networks to be protected and provide common and different modes protection.
DC SPD installed location are recommended at both ends of the DC power supply line (solar panel side and inverter/converter side), ely if the line rounting is external and long.
High energy MOVs equipped with specific thermal disconnectors and related failure indicators.
Product Parameter (Specification)
Model DC SPD 2P 40KA 500V
Pole 2P 2P
Uoc max (V DC) 500V 1000V
Uc (V DC) 500V 1000V
ln(8/20)us(kA) 20 20
lmax(8/20)us(kA) 40 40
Up (kV) 2.5 3.2
Maximum working voltage 250VAC/30VDC
Maximum working current 1A(250VAC)
Wiring capacity Hard wire:4--25
Flexible wire:4--16
Striping length 10
Terminal screwa M5
Torque(Nm) Main circuit:3.5
Remote singal control:0.25
Protection class All profile:IP40
Connection port:IP20
Installation environment No obvious shock and cibration
Altitude ≤2000
Working Temperature ﹣3.0---+70
Installation installed with H35-7.5/DIN35 steel mounting rail
Q:When I can receive quotation and detail information after send the enquiry?
A: Reply will be sent in 24hours.
Q:What's the difference between you and other suppliers?
A:We have our own design box with PC/ABS material.
Q:Do you provide samples ? is it free or extra ?
A:Yes, we could offer the sample for free charge but do not pay the cost of freight.
Q:Can I get a sample for test before place order?
A:Of course! Q:How's the delivery?Because I really need them is urgently?
A:Samples cost 2-3 days. Bulk order cost 12-15 days.
Q:If i want to release order, what's the payment method you accept ?
A:We accept T/T, Western union, Trade Assurance.
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