ACAS0612_13 Datasheet, PDF (5/8 Pages) Vishay Siliconix – Precision Thin Film Chip Resistor Array

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DESCRIPTION
The production of the components 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 (96 % Al₂O₃) ceramic substrate
using a mask to separate the adjacent resistors and
conditioned to achieve the desired temperature coefficient.
Specially designed inner contacts are realized on both
sides. A special laser is used to achieve the target value by
smoothly cutting a meander groove in the resistive layer
without damaging the ceramics.
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 plating.
The result of the determined production is verified by an
extensive testing procedure and optical inspection
performed on 100 % of the individual chip resistors. Only
accepted products are laid directly into the paper tape in
accordance with IEC 60286-3 ⁽³⁾.
ASSEMBLY
The resistors are suitable for processing on automatic
SMD assembly systems. They are suitable for automatic
soldering using reflow or vapour phase as shown in
IEC 61760-1 ⁽³⁾. The encapsulation is resistant to all
cleaning solvents commonly used in the electronics
ACAS 0612 - Precision
Vishay Beyschlag
industry, including alcohols, esters and aqueous solutions.
The suitability of conformal coatings, if applied, shall be
qualified by appropriate means to ensure the long-term
stability of the whole system. The resistors are RoHS
compliant; the pure tin plating provides compatibility with
lead (Pb)-free and lead-containing soldering processes. The
permitted storage time is 20 years, whereas the solderability
is specified for 2 years after production or requalification.
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 Life Vehicle Directive (ELV) and
Annex II (ELV II)
• 2011/65/EC Restriction of the use of Hazardous
Substances directive (RoHS)
• 2002/96/EC Waste Electrical and Electronic Equipment
Directive (WEEE)
TESTS
Where applicable, the resistors are tested in accordance
with EN 140401-801 which refers to EN 60115-1 and
EN 140400.
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  policy 
environmental policy group  chemicals  jig  Joint Industry Guide (JIG-101 Ed 2.0).
(3) _{The quoted IEC standards are also released as EN standards with the same number and identical contents.}
FUNCTIONAL PERFORMANCE
Standard Mode
Precision Mode
100
80
60
40
20
0
- 55
0
50 ₇₀ 85 100 125 150
180
Ambient Temperature in °C
For permissible resistance change please refer to table MAXIMUM RESISTANCE CHANGE AT RATED POWER
Derating
Revision: 12-Apr-13
5
Document Number: 28751
For technical questions, contact: [e-mail]
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