DC Surge Protective Device (SPD)
DC surge protective devices clamp transient overvoltages on the PV DC side, protecting strings, combiner boxes, and inverters from lightning and switching surges. This page helps you select pole configuration, voltage rating, and discharge capacity.
What Is a DC SPD A DC surge protective device (SPD) limits transient
overvoltages on the DC side of a solar system by diverting surge current to ground, protecting downstream equipment such as inverters and combiner boxes. TYPLE’s TPU7-40 is a Type 2 (Class II) DC SPD rated for DC 500 / 600 / 1000 / 1500 V, with nominal discharge current (In) of 20 kA and maximum discharge current (Imax) of 40 kA. It is engineered to align with IEC 61643-31; component-level certificates are available through TYPLE’s qualified supply-chain partners.
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TYPLE is a Wenzhou-based manufacturer of PV combiner boxes and DC protection components for solar and energy storage systems.
Get Your Quote Within 24 Hours
TYPLE is a Wenzhou-based manufacturer of PV combiner boxes and DC protection components for solar and energy storage systems.
Applications
Combiner box integration: string-level surge protection inside the DC box. Inverter input: protects the inverter DC stage. High-lightning regions: Type 2 protection for exposed rooftop and ground-mount arrays.
DC SPD Series
- Poles: 2P / 3P
- Rated working voltage (Ue): DC 500 / 600 / 1000 / 1500 V
- Voltage protection level (Up): 2.2 / 3.6 / 5.3 kV
- Nominal discharge current In (8/20 µs): 20 kA
- Maximum discharge current Imax (8/20 µs): 40 kA
- Classified test: Class II (Type 2)
- Mounting: 35 mm DIN rail
- Engineered to align with IEC 61643-31. Component-level certificates available through qualified supply-chain partners
OEM & Customization
TYPLE supplies DC SPDs for OEM combiner box integration, with pole configuration and voltage rating matched to your system, delivered with short lead times from the Liushi low-voltage supply hub.
Frequently Asked Questions
In most outdoor installations yes â a DC SPD protects the array and inverter from lightning-induced and switching surges, a leading cause of PV electronics failure.
The TPU7-40 is rated for DC 500, 600, 1000, and 1500 V, covering common residential, commercial, and utility PV string voltages.
It provides a nominal discharge current (In) of 20 kA and a maximum discharge current (Imax) of 40 kA at 8/20 µs.
