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DC Protection Devices
WDCM DC Miniature Circuit Breaker
Overcurrent and short-circuit protection for the DC side of a PV installation, in one, two and four pole versions. Pole count is what sets the working voltage here — 250V, 500V and 1000V respectively — because the poles are wired in series to share the arc, and a DC arc has no zero crossing to help extinguish it.
Technical overview
Core specifications
Rated current In6, 8, 10, 13, 16, 20, 25, 32, 40, 50, 63A
Poles1P, 2P, 4P
Rated voltage Ue250VDC (1P), 500VDC (2P), 1000VDC (4P)
Rated breaking capacity6,000A
Type of tripThermo-magnetic
Thermal release1.05–1.30 × In
Magnetic release10 In ± 20%
Impulse withstand Uimp (1.5/50)4,000V
Dielectric test voltage3kV for 1 min at industrial frequency
Electrical life4,000 cycles
Mechanical life10,000 cycles
Terminal capacity25mm² max
Terminal connectionCable, pin-type busbar or fork-type busbar
Tightening torque2.5N·m max
Ingress protectionIP20
Ambient temperature−5°C to +40°C, 95% humidity max
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Technical files
Datasheet, dimensions and certificate scope
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PDF · Product datasheet DWG/PDF · Dimensions & installation PDF · Certificate scope
Request Technical Files Typical use
- PV string protection
- Combiner box protection
- Inverter input isolation
Compliance references
- IEC / EN 60947-2
Customisation scope
- Pole configuration
- Rated current selection
- Marking
- Packaging
Related products
Other products supplied for the same installations.
DC Protection Devices
WENC PV DC Combiner Box
A populated DC combiner box for the string side of a rooftop or ground-mount array — fuses on both polarities, an isolating DC breaker for maintenance, and a 1000V surge protector, in an IP65 enclosure rated for outdoor UV exposure.
View specifications →
DC Protection Devices
WPV-FU Photovoltaic Fuse Link
gPV fuse links in the two sizes the PV market actually uses: 10 × 38 for 1000V systems and 10 × 85 for 1500V. Both interrupt in under a millisecond and are rated for the full-range duty a string fuse has to cover.
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DC Protection Devices
WPV32 Photovoltaic Fuse Holder
DIN-rail holders for the matching PV links, at 1000V and 1500V. The 1000V version carries a blown-fuse indicator, which is what makes a fault findable on an array without pulling every holder.
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