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 an anodised Heat sink using high temperature moulding compound.
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 an anodised Heat sink using high temperature moulding compound.
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 applications include Induction furnace, Medical equipment’s application’s , Humidity chambers etc.
| 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 |
| Operating Temp | -55°C to 250°C |
| Deratings | Deratings required for reduced chassis mounted area and for high ambient temperatures. Derate to zero Power Linearly at 250°C ambient. Derating necessary for unmounted resistors at ambient temperatures of 25°C, 5W & 10W - 40%, 25W-50% 50W & above 60%. |
R = Length, S = Width, T = Thickness
value & wattages lower & higher than specified available.
Non - inductive type available.
ORDERING PROCESS/ NOMENCLATURE
ONICS
AHR 50 100R K 0919
ONICS – BRAND NAME
AHR – MODEL NAME
50 – WATTAGE OF THE RESISTOR
100R – RESISTANCE VALUE
K – TOLERANCE +/-10%, IF TOLERANCE +/-5% USES J INSTEAD OF K
09 – MOTH OF MANUFACTURING
19- YEAR OF MANUFACTURING