C&H Technology RTOP User Manual

6121 Baker Road,
Suite 108
Minnetonka, MN 55345

www.chtechnology.com

Phone [phone]

Fax [phone]

1-800-274-4284

Thank you for downloading this document from C&H Technology, Inc.

Please contact the C&H Technology team for the following questions -

Technical ● Application ● Assembly ● Availability ● Pricing

Phone – 1-800-274-4284

E-Mail – [e-mail]

www.chtechnology.com - SPECIALISTS IN POWER ELECTRONIC COMPONENTS AND ASSEMBLIES

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www.chtechnology.com

RTOP

Vishay Sfernice

Power Resistor for Mounting onto a Heatsink

Thick Film Technology

FEATURES

• 1 % tolerance available

• High power rating = 200 W

• Wide ohmic value range = 0.046 to 1 MΩ

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

RoHS

COMPLIANT

DIMENSIONS in millimeters

RTOP

• Tolerances unless otherwise specified: ± 0.3 mm

MECHANICAL SPECIFICATIONS

Mechanical Protection
Substrate

Alumina on insulated base

Resistive Element
End Connections
Tightening Torque Connections
Tightening Torque Heatsink
Weight

Insulated case

Cermet
V connections: screw M4 x 6
1 Nm
2 Nm
30 g max.

V Connections

12.6
25

12.6

10

4

16

Ø 4.2

39

30

ELECTRICAL SPECIFICATIONS

Resistance Range 0.046 to 1 MΩ

Standard Tolerance ± 1 % to ± 10 %

Power Rating

50 W to 200 W

at + 25 °C

Temperature Coefficient

ENVIRONMENTAL SPECIFICATIONS

Temperature Range
Climatic Category

www.vishay.com For technical questions, contact: [e-mail]
1 Revision: 14-Nov-08

- 55 °C to + 125 °C
55/125/56

(- 55 °C to + 125 °C)

Insulation Resistance > 10

Standard

± 300 ppm/°C (R < 1)
± 150 ppm/°C (R > 1)

6

MΩ

Document Number: 50045