Coltan Tantalite Ore

We are offering coltan tantalite ore.
mineral type:tantalite
substrate: alumina
resistor: thick film
coating: glass
terminals: solder plated - phosphor bronze
thermal conductivity:20 wattsmeter°c
temperature coefficient: 1 ohm 450 ppm°c
1 to 100ω 100 ppm°c
101ω and up 50 ppm°c
electrical tolerance: ±1% and ±5% (other tolerances available)
power rating: based on 25°c free air
resistance range: 0.5 ohm to 10m ohm. Consult factory for other values
maximum operating voltage: 350 vac, 500 vdc through glass, 1000 vac, 1500 vdc through substrate
overload: five times rated power, as long as the one second average dissipation does not exceed the wattage rating.
Δr: ±2%, 2000 hours
derating: 100% @ 25°c to 0% @ 350°c.