RB Series :: ATE Electronics s.r.l.

RB Series

Fixed power wirewound resistors aluminium housed 10 W to 250 W

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Dissipatore ad alta conducibilità termica.
Profilo del radiatore progettato per la massima dissipazione del calore,
sia con ventilazione naturale che forzata.
Trattamento superficiale che garantisce un’ottima resistenza agli urti ed
agli agenti chimici esterni.
Protezione dell’elemento resistivo realizzato con resina termoindurente
che, per l’elevata conduttività termica e la minima distorsione, è adatta a
sopportare alte temperature.
Avvolgimento realizzato con uniformità di passo e massima copertura
dell’intero supporto, per ottenere un alto fattore dissipativo.
Supporto rettificato per permettere la massima uniformità di avvolgimento.
Marcatura sulla sommità del radiatore per una facile identificazione dopo
il montaggio.
Realizzazione di tutte le connessioni mediante puntatura elettrica.

 

Extruded aluminium housing provides superior heat conduction.

Housing deep finned for maximum heat dissipation at natural or forced air convection.

Gold anodized finish for maximum resistance to environmental conditions.

Special thermosetting compound with high thermal conductivity.

Winding designed to give maximum core coverage and uniformity for even heat dissipation.

Core centerless ground for maximum winding uniformity.

Marking at top surface for easy identification after mounting.

Complete welded construction terminal to terminal.

 

 

 

These resistors meet or exceed the requirements of MIL-PRF-18546 G specifications.

 

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 for RB10

2500 Vac for RB25 and RB50

3500 Vac for RB75, RB101, e RB150

4500 Vac for 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

 

 

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Mechanical 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

 

 

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Derating

 

ATE RB resistors have an operative temperature range from -55°C to +250°C

Derating is required for reduced chassis area and for high ambient temperature

 

 

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