The resistors offer IP20 or IP65 protection. Standard tolerance is ± 10 per cent, with a maximum permissible operating voltage of UL 600V and/or UL 1000V,
Vishay has released the Draloric VACR Series of compact aluminium-housed resistors with power ratings 50W to 500W. The new devices will serve in industrial, motor drive, railway, renewable energy, and other high-power systems as braking, chopper, pre-discharging, and voltage-limiting resistors applications.
The resistors offer IP20 or IP65 protection. Standard tolerance is ± 10 per cent, with a maximum permissible operating voltage of UL 600V and/or UL 1000V, depending on model. With short-term loads, the VACR resistors are characterized by up to an eleven-fold overload (on-time 6 per cent with a 120s cycle duration). E24 series resistance values are standard, with other values available on request.
The VACR resistors come in a completely housed construction that provides enhanced humidity protection and features low weight up to 1.1kg. Multiple construction and heatsink mounting options are available for higher power ratings. The devices can be ordered either in horizontal or vertical arrangements. Their compact enclosure ranges in size from 160mm x 40mm x 20mm to 337mm x 60mm x 30mm, depending on power rating, says the company.
