Description
Electrical Specifications
– Ohmic values
Serie E24. For out of range or not standard ohmic values, consult ATE Technical Dept.
– Tolerance
Standard 5%. Available on request up to 1%.
– Temperature coefficient
±30 ppm R > 20 Ohm
±50 ppm 1 Ohm < R < 20 Ohm
±100 ppm 0.1 Ohm < R < 1 Ohm
– Dielectric strength
1500 Vac per il tipo RB10
2500 Vac per i tipi RB25 e RB50
3500 Vac per i tipi RB75, RB101, e RB150
4500 Vac per i tipi RB100 E RB250
– Insulation resistance
10000 MOhm minimum
1000 MOhm after moisture test
– Overload
5s at 5 times rated power
-Non inductive
Models of equivalent physical and electrical specifications are also available with non inductive Ayrton-Perry winding
Mecanical Specifications
-Terminal strength
10 lb. pull test; 3 Nm x RB100 and 4 Nm x RB250 max torque
– Solderability
Satisfactory when tested in accordance with method 208 of MIL-STD-202.
The use of high temperature solder is recommended when resistors work near the maximum specified ratings
Materials
– Core
Ceramic steatite or alumina centerless ground
– Resistive Element
Copper-nickel alloy or nickel-chrome alloy with specific temperature coefficient
– End caps
Stainless steel
– Encapsulant
High temperature thermosetting compound
-Housing
Aluminium with hard anodic finish
– Standard terminals
Copperweld RB10 to RB150
Stainless steel for RB100 and RB250
Derating
ATE RB resistors have and operative temperature range from -55°C to +250°C
Derating is required for reduced chassis area and for high ambient temperature