VR25, VR37, VR68
www.vishay.com
Vishay BCcomponents
Revision: 25-Sep-15
3
Document Number: 28907
For technical questions, contact: filmresistorsleaded@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
Production is strictly controlled and follows an extensive
set of instructions established for reproducibility. A
homogeneous film of metal alloy is deposited on a high
grade ceramic body and conditioned to achieve the desired
temperature coefficient. Plated steel termination caps are
firmly pressed on the metalized rods. Mostly, a special laser
is used to achieve the target value by smoothly cutting a
helical groove in the resistive layer without damaging the
ceramics. Connecting wires of electrolytic copper plated
with 100 % pure tin are welded to the termination caps.
The resistor elements are covered by a light blue
protective coating designed for electrical, mechanical, and
climatic protection. Four or five color code rings designate
the resistance value and tolerance in accordance with
IEC 60062.
Yellow and gray are used instead of gold and silver because
metal particles in the lacquer could affect high-voltage
properties.
The result of the determined production is verified by an
extensive testing procedure performed on 100 % of the
individual resistors. Only accepted products are stuck
directly on the adhesive tapes in accordance with
IEC 60286-1 or for the radial versions in accordance to
IEC 60286-2.
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 suitable for processing on automatic
insertion equipment and cutting and bending machines.
Excellent solderability is proven, even after extended
storage. They are suitable for automatic soldering using
wave or dipping.
The resistors are completely lead (Pb)-free, the pure tin
plating provides compatibility with lead (Pb)-free and
lead-containing soldering processes. The immunity of the
plating against tin whisker growth, in compliance with
IEC 60068-2-82, has been proven under extensive testing.
The encapsulant is resistant to cleaning solvent specified in
IEC 60115-1. The suitability of conformal coatings, if
applied, shall be qualified by appropriate means to ensure
the long-term stability of the whole system.
APPROVALS
These resistors meet the safety requirements of:
• UL1676 (510 k to 11 M); file no: E171160
• IEC 60065, clause 14.2
• DIN EN 60065, clause 14.1.a)
• VDE 0860, clause 14.1.a)
• CQC, China
RELATED PRODUCTS
For a correlated range of Metal Film Resistors see the
datasheet:
“High Ohmic / High Voltage Metal Film Leaded Resistors”,
www.vishay.com/doc?30260
For product that offers high power dissipation and metal
oxide film technology see the datasheet:
“High Power Metal Oxide Leaded Resistors”,
www.vishay.com/doc?20128
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.
