GBS, GBS E
Vishay Draloric
www.vishay.com
DESCRIPTION
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 fitted with lugs 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 lugs may be available on request, please inquire at
ww1resistors@vishay.com.
3D-Models are available on request, please inquire at
ww1resistors@vishay.com.
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 corrugated ribbons and turn
spacings, low ohmic values can be offered. With this
construction, rapid cooling is also possible. The glaze is
fired layer by layer, several times, at a high temperature
(> 600 °C). The resistors are marked with resistance,
tolerance, and winding material.
Different mounting accessories are available for fixing, see
the datasheet: www.vishay.com/doc?21015.
The slider of the adjustable type should be only moved after
removal of voltage and sufficient loosening of the screw.
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 GBS series meets single lot / date code packaging
requirements.
MATERIALS
All materials used are non-flammable and inorganic.
Vishay acknowledges the following systems for the
regulation of hazardous substances:
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.
• 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)
RELATED PRODUCTS
In lower continuous power applications and less demanding
environmental conditions the cement coated alternative, like
the ZBS series might be suitable, see the datasheet:
• The REACH regulation (1907/2006/EC) and the related list
(3)
of substances with very high concern (SVHC)
supply chain
for its
“Cemented Wirewound Resistors with Corrugated Ribbon”
www.vishay.com/doc?21011
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.
For high ohmic values, there is the vitreous coated GWS
series, see the datasheet:
Hence the products fully comply with the following
directives:
“Vitreous Wirewound Resistors with Lugs”
www.vishay.com/doc?21003
• 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.
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: 25-Jul-2019
Document Number: 21004
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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