What is the response time of the C40 series DC SPD?

The response time is less than 25ns, ensuring rapid protection against surge voltage.

Can the C40 series SPD be used in photovoltaic systems?

Yes, it is designed for PV DC systems and other DC applications with parallel installation.

What is the protection level (Up) range?

Depending on the model, the voltage protection level ranges from ~350V up to 3.5kV.

Is remote monitoring supported?

Yes, the SPD provides an optional remote signaling contact for SCADA/BMS integration.

What is the installation method?

The device uses pluggable modules with standard 35mm DIN-rail mounting, ensuring easy installation and replacement.

DC Surge Protective Device for PV (48V–1000V)

DC Surge Protective Device (DC SPD) — C40 Series (48V / 220V / 500V / 600V / 1000V)

The C40 series DC surge protective device (SPD) is engineered for photovoltaic DC buses and other DC networks. It uses parallel installation to provide reliable surge suppression without affecting normal system operation.

Key Features

Wide clearance & creepage distance; withstands high voltage; suitable for high-altitude areas.
Pluggable modular cartridge; standard 35mm DIN-rail mounting.
High-quality lightning-proof components for stable performance.
Hot-melt + over-current dual protection circuit.
Status window: green = normal, red = replacement required.
Low residual voltage, fast response <25ns, strong discharge capability.
Optional remote signaling contact for SCADA/BMS.

Main Technical Parameters — C40 Series

Model	Max Continuous Operating Voltage Uc (DC)	Nominal Discharge Current I_n (8/20 μs)	Max Discharge Current I_max (8/20 μs)	Voltage Protection Level Up	Response Time	Operating Environment	Cross Section of L/N	Protection Class	Outline Size (mm)
C40-48	48V DC	20 kA	40 kA	~ 350 V	<25 ns	−40 °C ~ +80 °C	≥ 10 mm²	IP20	36 × 66 × 90
C40-220	220V DC	20 kA	40 kA	~ 1.8 kV	<25 ns	−40 °C ~ +80 °C	≥ 10 mm²	IP20	36 × 66 × 90
C40-500	500V DC	20 kA	40 kA	~ 2.5 kV	<25 ns	−40 °C ~ +80 °C	≥ 10 mm²	IP20	36 × 66 × 90
C40-600	600V DC	20 kA	40 kA	~ 2.8 kV	<25 ns	−40 °C ~ +80 °C	≥ 10 mm²	IP20	36 × 66 × 90
C40-1000	1000V DC	20 kA	40 kA	~ 3.5 kV	<25 ns	−40 °C ~ +80 °C	≥ 10 mm²	IP20	54 × 66 × 90

Notes: Values follow the supplied datasheet. Update cells if your latest engineering data differs.

Drawings

Dimension

Wiring Diagram (Parallel)

FAQ

Which systems is the C40 series designed for?

Photovoltaic DC buses and other DC networks from 48V to 1000V. Select the model by matching Uc.

How do I choose among C40-48 / 220 / 500 / 600 / 1000?

Choose by the max continuous voltage Uc of your DC bus, then verify surge ratings (In/Imax) and target a low Up.

Where should the SPD be installed?

Install at the DC combiner/distribution panel with parallel wiring, short leads, and a reliable PE bar. Follow the diagram.

Is the module replaceable and is remote signaling available?

Yes. The cartridge is pluggable for quick replacement; an optional alarm contact can be wired to SCADA/BMS.

What environmental and wiring requirements apply?

Operating temperature −40°C ~ +80°C, cross-section of L/N ≥10mm², enclosure IP20.

How should surge protection be coordinated?

Coordinate with upstream over-current protection (e.g., DC fuse/breaker) and inverter limits to ensure selectivity and safety.

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DC Surge Protective Device for PV (48V–1000V) | DC SPD In 20kA / Imax 40kA