SMM0204_15 Datasheet, PDF (4/11 Pages) Vishay Siliconix – Thin Film Mini-MELF Resistors

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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 (Al₂O₃) and conditioned to achieve the
desired temperature coefficient. Nickel plated steel
termination caps are firmly pressed on the metallized rods.
A special laser is used to achieve the target value by
smoothly cutting a helical groove in the resistive layer
without damaging the ceramic. The resistor elements are
covered by a protective coating designed for electrical,
mechanical and climatic protection. The terminations
receive a final pure tin on nickel and copper plating for
enhanced temperature cycling stability. Four or five color
code rings designate the resistance value and tolerance in
accordance with IEC 60062 ⁽¹⁾.
The result of the determined production is verified by an
extensive testing procedure performed on 100 % of the
individual resistors. This includes full screening for the
elimination of products with a potential risk of early field
failures (feasible for R  10 ) according to EN 140401-803,
2.1.2.2. Only accepted products are laid directly into the
blister tape in accordance with IEC 60286-3, Type 2a ⁽¹⁾.
ASSEMBLY
The resistors are suitable for processing on automatic SMD
assembly systems. They are suitable for automatic
soldering using wave, reflow or vapor phase as shown in
IEC 61760-1 ⁽¹⁾. The encapsulation is resistant to all
cleaning solvents commonly used in the electronics
industry, including alcohols, esters and aqueous solutions.
The suitability of conformal coatings, potting compounds
and their processes, if applied, shall be qualified by
appropriate means to ensure the long-term stability of the
whole system.
The resistors are completely lead (Pb)-free, the pure tin
plating provides compatibility with lead (Pb)-free and lead
containing soldering processes. Solderability is specified for
2 years after production or requalification, however,
excellent solderability is proven after extended storage in
excess of 10 years. The permitted storage time is 20 years.
The immunity of the plating against tin whisker growth has
been proven under extensive testing.
SMM0204
Vishay Draloric
All products comply with the IEC 62474, Material
Declaration for Products of and for the Electrotechnical
Industry.
The dedicated database ⁽²⁾, that list declarable substances,
ensures full compliance 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)
• 2012/19/EU Waste Electrical and Electronic Equipment
Directive (WEEE)
APPROVALS
The resistors are qualified according to AEC-Q200.
Resistors approved according to EN 140401-803 are
available by using the related ordering code.
RELATED PRODUCTS
MELF resistors of other sizes are available:
Thin Fim Micro-MELF Resistors SMM0102
(www.vishay.com/doc?20003)
Thin Fim MELF Resistors SMM0207
(www.vishay.com/doc?20005)
Resistors are available with established reliability in
accordance with EN 140401-803 Version E. Please refer to
datasheet “MELF Resistors with Established Reliability”
(www.vishay.com/doc?28707).
MS1 .... ESCC high-reliability thin film MINI-MELF resistors
are the premium choice for design and manufacture of
equipment, where matured technology and proven reliability
are of utmost importance. They are regularly used in
communication and research satellites and fit equally well
into aircraft and military electronic systems.
Approval of the MS1 .... ESCC products is granted by the
European Space Components Coordination and registered
in the ESCC Qualified Parts List, REP005. 
(www.vishay.com/doc?28790).
Notes
(1) _{The quoted IEC standards are also released as EN standards with the same number and identical contents.}
(2) _{IEC 62474 database can be found at: http://std.iec.ch/iec62474.}
Revision: 17-Apr-15
4
Document Number: 20004
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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