01
Higher-current PV string circuits
Use the VOPV-63 version with a coordinated gPV 14 × 51 mm fuse link for photovoltaic circuits up to the confirmed 1000 V DC rating.
VOPV Series
RT18-63 / VOPV-63
14 × 51 mm fuse isolation and circuit protection for higher-current photovoltaic DC and low-voltage AC circuits.
690 V AC / 1000 V DCVersion voltage
8–50 ARated-current range
14 × 51 mmFuse-link size
100 kA / 50 kABreaking capacity
01 / PRODUCT VIEWA modular 14 × 51 mm fuse-combination unit offered as the RT18-63 AC platform and the VOPV-63 photovoltaic DC platform, with current options up to 50 A and front-access fuse isolation. The larger 14 × 51 mm platform extends the fuse range to 50 A while retaining a modular DIN-rail format, helping panel builders standardize higher-current AC and photovoltaic DC protection assemblies.
02 / TECHNICAL DATA
RT18-63 / VOPV-63 technical data
Use these ratings for initial model comparison. Confirm the circuit voltage, fuse-link utilization category, operating current, prospective fault current and controlled documentation before ordering.
Electrical ratings and installation dimensions
Version voltage690 V AC / 1000 V DC
Rated-current range8–50 A
Fuse-link size14 × 51 mm
Breaking capacity100 kA / 50 kA
Product versionsRT18-63 (AC) / VOPV-63 (PV DC)
RT18-63 rated voltageAC 500 / 690 V, 50 Hz
VOPV-63 rated voltageDC 1000 V
Rated-current options8, 10, 12, 15, 16, 20, 25, 30, 32, 35, 40, 45, 50 A
RT18-63 breaking capacity100 kA
VOPV-63 breaking capacity50 kA
RT18-63 / VOPV-63 dimension reference
Dimension drawing
Request the current dimension drawing for this model.
Configure RT18-63 / VOPV-63
Choose the electrical version first, then confirm fuse current and pole arrangement.
04 / APPLICATIONS
Applications for RT18-63 / VOPV-63
02
PV combiner and inverter protection
The 50 A platform supports selected combiner-box, array and inverter-side DC protection arrangements after circuit coordination.
03
Low-voltage AC equipment protection
Use the RT18-63 version with the correct fuse-link category for compatible AC distribution, motor or semiconductor-protection applications.
05 / RESOURCES
RT18-63 / VOPV-63 controlled documents
Request documents matched to the selected electrical version, fuse link, pole arrangement and destination market.
What is the difference between RT18-63 and VOPV-63?
RT18-63 is the AC version rated up to AC 500/690 V with a stated 100 kA breaking capacity. VOPV-63 is the photovoltaic DC version rated up to DC 1000 V with a stated 50 kA breaking capacity.
Which fuse-link size does the unit accept?
Both versions use the cylindrical 14 × 51 mm fuse-link format.
What current ratings are listed?
The supplied data lists 8, 10, 12, 15, 16, 20, 25, 30, 32, 35, 40, 45 and 50 A options.
How is this model different from RT18-32 / VOPV-32?
The 63 platform uses a larger 14 × 51 mm fuse format, supports listed currents up to 50 A, and occupies 27 mm per pole. The 32 platform uses 10 × 38 mm links, supports up to 32 A, and occupies 18 mm per pole.
Can the fuse carrier be operated under load?
No. The product marking states that it must not be operated under load. The circuit must be safely isolated and verified before service.
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