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Document Number: 28770

280

Revision: 06-Nov-09

ACAS 0606 AT, ACAS 0612 AT - Precision

Vishay Beyschlag

Precision Thin Film Chip Resistor Array

Superior Moisture Resistivity

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

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

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

solvents commonly used in the electronics 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

and

the

list

of

legal

restrictions

on

hazardous substances. This includes full compliance with

the following directives:

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

The chip resistor array is AEC-Q200 qualified.

Where applicable, the resistors are tested in accordance with

EN 140401-801 which refers to EN 60115-1 and EN 140400.

Notes

→ policy →

environmental policy group

→ chemicals → jig → Joint Industry Guide (JIG-101 Ed 2.0)

FUNCTIONAL PERFORMANCE

100

- 55

Ambient Temperature in °C

155

0

050

70

Derating

Power Mode

Standard Mode

20

40

60

80

100

125

180

For permissible resistance change please refer to table MAXIMUM RESISTANCE CHANGE AT RATED POWER, above