Aluminium House Resistor

CONSTRUCTION

Aluminium housed Resistor are wound with Nickel Copper or Nickel Chromium wire for obtaining required resistance on a ceramic core fitted with end caps. The winded assembly is then encapsulated in a anodised Heat sink using high temperature moulding compound.

FEATURES

APPLICATION

These Resistors are applied where high wattage dissipation is required in a small space. The metal heat sink ensures good heat dispersal & allows a low hot-spot temperature. Major application include Induction furnace, Medical equipments, Humidity Chambers etc.

SPECIFICATION
Power Rating            -    5 Watts to 250 Watts
Terminations            -    Lugs for 5 - 50W , Screws for 100 - 250W
Temp Coeff              -    ± 50 PPM to 200 PPM
Tolerance               -    ± 10%, Closer tolerances available.
Dielectric Voltage      -    1000 VAC for 5W & 10W, 1500 VAC for 25 W & 200W
                             2000 VAC for 250 W
Overload                -    5 x wattage rating for 5 sec.
Insulation Resistance -      > 20 M Ohms
Operating temp.         -    -55°C to 250°C
Deratings               -    Deratings required for reduced chassis
                             mounted area and for high ambient temperatures.