G200
www.vishay.com
Vishay Draloric
Revision: 28-Mar-17
3
Document Number: 21002
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
DESCRIPTION
Vitreous wirewound resistors are best suited for the use in
demanding environmental conditions. Their rugged design
and durable coating 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
ceramic body (Al
2
O
3
). 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. Product quality is verified by testing procedures,
performed on all individual resistors.
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
substances given therein
(1)
• The Global Automotive Declarable Substance List
(GADSL)
(2)
• The REACH regulation (1907/2006/EC) and the related list
of substances with very high concern (SVHC)
(3)
for its
supply chain
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)
• 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
www.vishay.com/doc?49037
.
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
inquire at ww1resistors@vishay.com
.
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
40 °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 products approved to CECC 40201-801: FDG, FDK,
FDP with established reliability and failure rate level E7, see
the datasheet:
• “FDG, FDK, FDP - Axial Vitreous Leaded Wirewound
Resistors with CECC Approval, Available with Established
Reliability”
www.vishay.com/doc?21046
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
(1)
The IEC 62474 list of declarable substances is maintained in a dedicated database, which is available at http://std.iec.ch/iec62474
(2)
The Global Automotive Declarable Substance List (GADSL) is maintained by the American Chemistry Council, and available at
www.gadsl.org
(3)
The SVHC list is maintained by the European Chemical Agency (ECHA) and available at http://echa.europa.eu/candidate-list-table
