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參數(shù)資料
| 型號： | UMA0204 |
| 廠商： | Vishay Intertechnology,Inc. |
| 英文描述： | Ultra Precision MELF Resistor |
| 中文描述： | 超精密晶圓電阻 |
| 文件頁數(shù)： | 3/8頁 |
| 文件大?。?/td> | 109K |
| 代理商： | UMA0204 |
UMA 0204
Vishay Beyschlag
Ultra Precision MELF Resistor
Document Number: 28715
Revision: 25-Feb-04
For technical questions contact: ff3bresistors@vishay.com
www.vishay.com
3
DESCRIPTION
P
of
homogeneous film of metal alloy is deposited on a high grade
ceramic body (85 % Al
2
O
3
) and conditioned to achieve the
desired
temperature
stability.
terminations are firmly pressed on the metallised rods. A
special laser is used to achieve the target value by smoothly
cutting in the resistive layer without damaging the ceramics.
A further conditioning is applied in order to stabilise the
trimming result. 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. Five colour rings designate the resistance
value and tolerance in accordance with
Additional colour dots near the fourth ring are used to identify
the temperature coefficient.
roduction is strictly controlled and follows an extensive set
instructions
established
for
reproducibility.
A
Nickel
plated
steel
IEC 60062
.
The result of the determined production is verified by an
extensive testing procedure under strict temperature control,
performed on 100 % of the individual resistors. Only
accepted products are laid directly into the antistatic blister
tape in accordance with
IEC 60286-3
.
ASSEMBLY
The resistors are suitable for processing on automatic SMD
assembly systems. They are suitable for automatic soldering
using reflow or vapour phase. 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
CEFIC-EECA-EICTA list of legal restrictions on hazardous
substances. This includes full compatibility with the
European RoHS directive.
APPROVALS
The resistors are tested in accordance with
which refers to
EN 60115-1, EN 140400
enviromental test procedures of the
Approval of conformity is indicated by the
package label.
EN 140401-803
and the variety of
IEC 60068
CECC
logo on the
series.
Vishay
Manufacturer"
release certificate for
accordance with
granted for the Vishay BEYSCHLAG manufacturing process.
BEYSCHLAG
in accordance with
"Technology Approval Schedule"
CECC 240001
based on
has
achieved
"Approval
EN 100114-1
of
. The
in
is
EN 100114-6
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