FDG, FDK, FDP
www.vishay.com
DESCRIPTION
Vishay Draloric
ASSEMBLY
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.
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
inquire at ww1resistors@vishay.com.
These components are high dissipation power resistors,
customers are advised to use a high melting point solder.
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
ceramic body (Al2O3). The ceramic meets the highest
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.
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.
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.
RELATED PRODUCTS
For the related G200 product family, without CECC
approval, see the datasheet:
MATERIALS
Vishay acknowledges the following systems for the
regulation of hazardous substances:
• “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:
• IEC 62474, Material Declaration for Products of and for the
Electrotechnical Industry, with the list of declarable
substances given therein (1)
• The Global Automotive Declarable Substance List
(GADSL) (2)
• “AC Series - Cemented Leaded Wirewound Resistors”
www.vishay.com/doc?28730
• The REACH regulation (1907/2006/EC) and the related list
(3)
of substances with very high concern (SVHC)
supply chain
for its
• “Z300 - Industrial Axial Cemented Leaded Wirewound
Resistors”
www.vishay.com/doc?21007
The products do not contain any of the banned substances
as per IEC 62474, GADSL, or the SVHC list, see
www.vishay.com/how/leadfree. Hence the products fully
comply with the following directives:
• 2000/53/EC End-of-Life Vehicle Directive (ELV) and
Annex II (ELV II)
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
• 2011/65/EU Restriction of the Use of Hazardous
Substances
2015/863/EU
Directive
(RoHS)
with
amendment
• 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
www.vishay.com/doc?49037.
Notes
(1)
The IEC 62474 list of declarable substances is maintained in a dedicated database, which is available at http://std.iec.ch/iec62474
The Global Automotive Declarable Substance List (GADSL) is maintained by the American Chemistry Council, and available at
www.gadsl.org
(2)
(3)
The SVHC list is maintained by the European Chemical Agency (ECHA) and available at http://echa.europa.eu/candidate-list-table
Revision: 28-Mar-17
Document Number: 21046
3
For technical questions, contact: ww1resistors@vishay.com
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
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