FDG, FDK, FDP

www.vishay.com

Vishay Draloric

Revision: 28-Mar-17

3

Document Number: 21046

THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT

DESCRIPTION

Vitreous wirewound resistors are best suited for the use in

demanding environmental conditions. Their rugged design

and durable coatings enable these resistors to withstand

extreme environmental stress. The vitreous coating is

designed for high stability and a long lifetime in humid

environments. The coating is resistant to all cleaning

chemicals commonly used in the electronic industry.

Production is strictly controlled and follows an extensive set

of instructions established for reproducibility. The winding is

done with specific materials on a specially developed fine

requirements

against

mechanical

resistance,

thermal

shocks, dielectric strength, and insulation resistance at high

temperatures. With different diameters and turn spacings, a

large ohmic value range can be offered. The glaze is fired

layer by layer, several times, at a high temperature

(> 600 °C). The resistors are marked with resistance and

tolerance, and in addition the FDG, FDK and FDP are

marked with the failure rate level. Product quality is verified

by resistance measurement, performed on 100 % of the

individual resistors.

Established reliability products within a package unit are

from the same production lot and carry the same date code.

Resistance is measured on the lead wires at a distance of

6 mm from the resistor body. If a greater length of lead wire

is used in the application, the user may need to consider the

additional wire resistance, particularly with low resistance

products.

MATERIALS

Vishay acknowledges the following systems for the

regulation of hazardous substances:

• IEC 62474, Material Declaration for Products of and for the

Electrotechnical Industry, with the list of declarable

• The

Global

Automotive

Declarable

Substance

List

• The REACH regulation (1907/2006/EC) and the related list

supply chain

The products do not contain any of the banned substances

as per IEC 62474, GADSL, or the SVHC list, see

comply with the following directives:

• 2000/53/EC End-of-Life Vehicle Directive (ELV) and

Annex II (ELV II)

• 2011/65/EU

Restriction

of

the

Use

of

Hazardous

Substances

Directive

(RoHS)

with

amendment

2015/863/EU

• 2012/19/EU Waste Electrical and Electronic Equipment

Directive (WEEE)

Vishay pursues the elimination of conflict minerals from its

supply

chain,

see

the

Conflict

Minerals

Policy

at

ASSEMBLY

The resistors are axial leaded for soldering. The terminals of

the resistors are completely lead (Pb)-free. The special tin

plating used, provides compatibility with lead (Pb)-free and

lead-containing soldering processes.

Special lead forms may be available on request, please

These components are high dissipation power resistors,

customers are advised to use a high melting point solder.

APPLICATION INFORMATION

The

power

dissipation

of

the

resistor

generates

a

temperature rise with respect to the ambient. The

permissible dissipation is derated for temperatures above

70 °C, as shown in the derating diagram, in order to avoid

overheating of the resistor. The heat dissipated from the

resistor may affect adjacent components, hence proper

clearance will be required in order to avoid overheating.

The resistive wire is hermetically encapsulated. All materials

used are non-flammable and inorganic.

These resistors do not feature a limited lifetime when

operated within the permissible limits. However, resistance

value drift increasing over operating time may result in

exceeding a limit acceptable to the specific application,

thereby establishing a functional lifetime.

RELATED PRODUCTS

For the related G200 product family, without CECC

approval, see the datasheet:

• “G200 - Axial Vitreous Leaded Wirewound Resistors”



www.vishay.com/doc?21002

In lower continuous power applications and less demanding

environmental conditions the cement coated alternatives,

like the AC series or the Z300 series, might be suitable, see

the datasheets:

• “AC Series - Cemented Leaded Wirewound Resistors”



www.vishay.com/doc?28730

• “Z300 - Industrial Axial Cemented Leaded Wirewound

Resistors”



www.vishay.com/doc?21007

For precision applications, there is the cement coated PAC

series, see the datasheet:

• “PAC Series - Cemented Leaded Wirewound Precision

Resistors”



www.vishay.com/doc?28731

Notes

www.gadsl.org