Description
Safely extinguishing direct-current switching arcs in high-voltage PV circuits.
DEHN DG YPV SCI 1000 is a German-engineered Type 2 solar DC surge protective device (SPD) operating at 1,000 V DC, featuring patented SCI (Short-Circuit Interruption) arc-extinction technology and fault-tolerant Y-circuit topology, engineered to protect hybrid solar inverters against catastrophic lightning overvoltages without DC fire risks.
Patented SCI Arc-Extinction Technology
Combined disconnect and short-circuit mechanism prevents dangerous DC switching arcs and eliminates inverter fire hazards.
1,000 V Maximum DC Continuous Operating Voltage (Ucpv)
Specifically engineered for modern residential and commercial high-voltage solar string configurations.
Fault-Tolerant Y-Circuit Topology
Prevents damage to protective modules during insulation faults in the PV generator circuit.
Pluggable Protection Cartridges with Visual Indicator
Allows fast, tool-free module replacement during routine maintenance without disconnecting string wiring.
More product details
When a standard DC surge arrester fails at the end of its service life, continuous direct current maintains an open plasma arc that can ignite electrical combiner boxes. DEHN's patented SCI technology creates an intentional internal short circuit that safely extinguishes the arc before isolating.
- Combined thermal disconnect and integrated internal bypass fuse safely quench DC arcs.
- Fault-tolerant Y-circuit prevents SPD failure even in the event of an earth fault on the solar array.
- Verified short-circuit current rating ($I_{scpv}$) up to 10 kA DC without backup fusing.
Fast cartridge replacement with mechanical status flags.
Inspecting surge protection status during annual O&M audits requires clear mechanical flags that work without electrical power. Green/Red mechanical status window clearly indicates protective module readiness. Modular plug-and-play cartridges allow replacement without rewiring DC terminal blocks. Standard 35 mm DIN-rail mount (54 mm / 3U width) fits standard DC string combiner enclosures.
Holds a flag on each path
Green is ready. Red is the spent path. No FM contact sits on this part number.
Fits IEC 60364-7-712 PV systems
The test is EN 50539-11. The circuit is type 2.
Stops at 4 kV on the protection level
UP is 4 kV or less. The Y circuit takes three paths.
Technical data
German-engineered lightning and overvoltage protection eliminating direct-current fire risks in solar arrays.
1000 V DC surge arrester with integrated SCI short-circuit arc-extinction technology.
Engineered by DEHN in Germany, the DG YPV SCI 1000 provides high-reliability Type 2 surge protection for 1000 V DC solar arrays. Its patented three-step DC disconnection mechanism with integrated combined fuse and spark-gap (SCI technology) safely extinguishes direct-current switching arcs without fire risk or inverter downtime.
- Max Operating
- 1,000 V DC
- Max Discharge
- 25.0 kA
- Zero Arc Risk
- SCI Tech
- Combiner Mount
- DIN-Rail
Protection
- SPD type
- Type 2 according to EN 50539-11
- Max. PV voltage (UCPV)
- 1000 V
- Short-circuit current rating (ISCPV)
- 1000 A
- Nominal discharge current In (8/20 µs, DC± → PE)
- 12.5 kA
- Max. discharge current Imax (8/20 µs)
- 25 kA
- Voltage protection level (UP)
- ≤ 4 kV
Design
- Configuration
- Multipole, fault-resistant Y circuit of three protective paths
- Disconnection
- Three-step d.c. switching device (patented SCI principle)
- Status indication
- Green / red indicator flag per protective circuit
- Remote signalling
- None on this part numberthe FM version 950 535 adds a floating changeover contact
- Supply form
- Prewired complete unit
Application
- PV systems
- All PV systems according to IEC 60364-7-712
- Designed for
- String inverter systems with system current up to 1000 A
- Tested to
- EN 50539-11
Approvals and logistics
- Approvals
- KEMA, UL
- Manufacturer part number
- 950 530
- EAN
- 4013364152960
- Weight
- 300 g
Project fit
Where this model fits.
Scenarios that show which projects the DEHN DG YPV SCI 1000 (type 2 DC surge arrester, 1000 V PV) belongs in, what to verify before quoting, and when another model is the better pick.
DC Surge Protection for Residential & Commercial Inverters (up to 1000 V DC)
String combiner boxes, hybrid inverter DC inputs, and rooftop junction boxes requiring certified Type 2 surge protection under IEC 60364-7-712.
Premium German lightning protection engineering eliminating DC arc fire hazards.
- Confirm this model against the adjacent rating in the same family
Documents
DEHN DG YPV SCI 1000 datasheet (DE, Art.-Nr. 950530) DEHN Surge Protection Catalogue (Edition 2)Product questions
What is the benefit of the Y-circuit configuration over traditional 2-pole SPDs?
The Y-circuit prevents SPD damage if an insulation ground fault occurs on the solar array. Traditional 2-pole surge arresters fail catastrophically if one PV pole develops an earth fault, because full string voltage concentrates across the remaining varistor. The DEHN 3-pole Y-circuit distributes voltage across multiple varistors, allowing the system to maintain protection even during ground faults.