CMA0204_10 Datasheet, PDF (4/10 Pages) Vishay Siliconix – High Pulse Load MELF Resistors

High Pulse Load MELF Resistors
CMA 0204
Vishay Beyschlag
DESCRIPTION
Production of the CMA 0204 specialty MELF resistors with
advanced pulse load capability is strictly controlled and
follows an extensive set of instructions established for
reproducibility. A homogeneous and dense carbon film is
deposited on a high grade ceramic body (85 % Al₂O₃). Nickel
plated steel termination caps are firmly pressed on the
coated rods. A special laser is used to achieve the target
value by smoothly cutting a helical groove in the resistive
layer without damaging the ceramics. The resistors are
covered by protective coating designed for electrical,
mechanical and climatic protection.The terminations receive
a final pure tin on nickel plating. Four color code rings
designate the resistance value and tolerance in accordance
with IEC 60 062 ⁽³⁾.
The result of the determined production is verified by an
extensive testing procedure performed on 100 % of the
individual resistors. Only accepted products are laid directly
into the blister tape in accordance with IEC 60 286-3 ⁽³⁾.
ASSEMBLY
The resistors are suitable for processing on automatic
SMD assembly systems. They are suitable for automatic
soldering using wave, reflow or vapour phase as shown in
IEC 61760-1⁽³⁾. Excellent solderability is proven, even after
extended storage in excess of 10 years. The encapsulation
is resistant to all cleaning solvents commonly used in the
electronics industry, including alcohols, esters and aqueous
solutions. The resistors are completely lead (Pb)-free, the
pure tin plating provides compatibility with lead (Pb)-free
soldering processes. The immunity of the plating against tin
whisker growth has been proven under extensive testing.
All products comply with the GADSL ⁽¹⁾ and the
CEFIC-EECA-EICTA ⁽²⁾ list of legal restrictions on
hazardous substances. This includes full compliance with
the following directives:
• 2000/53/EC End of Vehicle life Directive (ELV) and Annex II
(ELV II)
• 2002/95/EC Restriction of the use of Hazardous
Substances Directive (RoHS)
• 2002/96/EC Waste Electrical and Electronic Equipment
Directive (WEEE)
APPROVALS
Where applicable the resistors are tested in accordance with
EN 140401-803 (superseding CECC 40401-803) which
refers to EN 60115-1, EN 140400 and the variety of
enviromental text procedures of the IEC 60068 ⁽³⁾ series.
Vishay BEYSCHLAG has achieved “Approval of
Manufacturer” in accordance with IEC QC 001002-3,
clause 2. The release certificate for “Technology Approval
Schedule” in accordance with CECC 240001 based on
IEC QC 001002-3, clause 6 is granted for the Vishay
BEYSCHLAG manufacturing process.
Notes
(1) _{Global Automotive Declarable Substance List, see www.gadsl.org.}
(2) _{CEFIC (European Chemical Industry Council), EECA (European Electronic Component Manufacturers Association), EICTA (European trade}
organisation representing the information and communications technology and consumer electronics), see www.eicta.org/index.php?id=995
→ issues → environment policy → chemicals → chemicals for electronics.
(3) _{The quoted IEC standards are also released as EN standards with the same number and identical contents.}
Document Number: 28717
Revision: 01-Mar-10
For technical questions, contact: [e-mail]
www.vishay.com
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