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RTOP

Vishay Sfernice

Document Number: 50045

Revision 14-Jan-04

For technical questions, contact sfer@vishay.com

MECHANICAL SPECIFICATIONS

Mechanical Protection

Insulated case

Substrate

Alumina on insulated base

Resistive Element

Cermet

End Connection

V connections: screw M4 x 6

Tightening Torque Connections 1 Nm

Tightening Torque Heatsink 2 Nm

ENVIRONMENTAL SPECIFICATIONS

Temperature Range

- 55°C to + 125°C

Climatic Category

55/125/56

Power Resistors for Mounting onto a Heatsink

Thick Film Technology

FEATURES

• 1% tolerance available

• High power rating

• Wide ohmic value range

• Non inductive

• Easy mounting

• Low thermal radiation of the case

• Standard Isotop case (SOT 227 B)

This series of thick film power resistors include modules which can incorporate up to 2 different resistor values in the same SOT

227B package. Two types of terminations are available along with a 4 terminal device for measurement applications in the case

of the single resistor version. This product range benefits from Vishay Sfernice’s experience in thick film power resistor technol-

ogy i.e high power: volume ratio, low tolerance or individual resistors and excellent overload capabilities (due to the trimming

technique).

V Connections

RTOP

• Tolerances unless otherwise specified: ± 0.3mm

DIMENSIONS in millimeters

Resistance Range

0.046 to 1MΩ

Standard Tolerance

± 1% to ± 10%

Power Rating

50W to 200W at + 25°C

Temperature Coefficient

Standard

± 300 ppm/˚C (R < 1)

± 150 ppm/˚C (R > 1)

Insulation Resistance

ELECTRICAL SPECIFICATIONS