Rev Date: 11/18/2020

6

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This specification may be changed at any time without prior notice.

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Please confirm technical specifications before you order and/or use.

RHC Series

High Power Thick Film Chip Resistor

Stackpole Electronics, Inc.

Resistive Product Solutions

The 102°C heat rise shown here would indicate there will be additional thermal reduction techniques needed to keep this

part under 105°C total hot spot temperature if this part is to be used at 0.75 watts of power. However, this same part at

the usual power rating for this size would have a heat rise of around 72°C. This additional heat rise may be dealt with

using wider conductor traces, larger solder pads and land patterns under the solder mask, heavier copper in the

conductors, via through PCB, air movement, and heat sinks, among many other techniques. Because of the variety of

methods customers can use to lower the effective heat rise of the circuit, resistor manufacturers simply specify power

ratings with the limitations on ambient air temperature and total hot spot temperatures and leave the details of how to best

accomplish this to the design engineers. Design guidelines for products in various market segments can vary widely so

it would be unnecessarily constraining for a resistor manufacturer to recommend the use of any of these methods over

another.

Note:

The final resistance value can be affected by the board layout and assembly process, especially the size of the mounting pads

and the amount of solder used. This is especially notable for resistance values ≤ 50mΩ.

This should be taken into account when designing.

RoHS Compliance

Stackpole Electronics has joined the worldwide effort to reduce the amount of lead in electronic components and to meet the various

regulatory

requirements now prevalent, such as the European Union’s directive regarding “Restrictions on Hazardous Substances”

(RoHS 3). As part of this ongoing program, we periodically update this document with the status regarding the availability of our

compliant components. All our standard part numbers are compliant to EU Directive 2011/65/EU of the European Parliament as

amended by Directive (EU) 2015/863/EU as regards the list of restricted substances.

RoHS Compliance Status

RHC

High Power Thick Film

Surface Mount Chip Resistor

SMD

YES(1)

100% Matte Sn over Ni

Jul-04

04/27

Lead-Free

Mfg. Effective Date

(Std Product Series)

Lead-Free

Effective Date

Code

(YY/WW)

Note (1): RoHS Compliant by means of exemption 7c-I.

Standard

Product

Series

Description

Package /

Termination

Type

Standard

Series

RoHS

Compliant

Lead-Free Termination

Composition