MMU 0102, MMA 0204, MMB 0207 - Precision
Precision MELF Resistors
Vishay Beyschlag
TEMPERATURE COEFFICIENT AND RESISTANCE RANGE
DESCRIPTION
RESISTANCE
TCR
25 ppm/K
TOLERANCE
0.25 %
0.1 %
MMU 0102
MMA 0204
MMB 0207
15 to 1 M
33 to 1 M
47 to 332 k
100 to 221 k
22 to 100 k
47 to 100 k
100 to 100 k
22 to 511 k
43 to 511 k
10 to 332 k
22 to 332 k
43 to 332 k
0.5 %
0.25 %
0.1 %
-
-
15 ppm/K
Notes
33 to 1 M
• Resistance ranges printed in bold are preferred TCR/tolerance combinations with optimized availability.
• Resistance values to be selected from E24 and E192 series, for other values please contact the factory.
• Approval to EN 140401-803, “Version A”, is not available for 15 ppm/K; 0.5 %.
(1)
All products comply with the GADSL
and the
DESCRIPTION
(2)
CEFIC- EECA-EICTA
list of legal restrictions on
hazardous substances. This includes full compliance with
the following directives:
Production is strictly controlled and follows an extensive set
of instructions established for reproducibility. A homo-
geneous 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 metallised 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.
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 color code rings designate the
resistance value and tolerance in accordance with
2000/53/EC End of Vehicle life Directive (ELV) and Annex II
(ELV II)
2011/65/EU Restriction of the use of Hazardous
Substances Directive (RoHS)
2002/96/EC Waste Electrical and Electronic Equipment
Directive (WEEE)
APPROVALS
The resistors are approved within the IECQ-CECC Quality
Assessment System for Electronic Components to the detail
specification EN 140401-803 which refers to EN 60115-1,
EN 140400 and the variety of environmental test procedures
of the IEC 60068 (3) series.
IEC 60062 (3)
.
The result of the determined production is verified by an
extensive testing procedure performed on 100 % of the
individual resistors. This includes pilse load screening (for R
10 ) and additional non-linearity screening (for R 30 )
for the elimination of products with a potential risk of early life
failures 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 II (3) or bulk case in accordance with
Conformity is attested by the use of the CECC logo (
) as
the mark of conformity on the package label.
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
IEC 60286-6 (3)
.
Vishay Beyschlag manufacturing process.
ASSEMBLY
The resistors are qualified according to AEC-Q200.
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). 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.
RELATED PRODUCTS
For thin film products with a wider resistance, see the
datasheet:
• “Professional MELF Resistors”
(www.vishay.com/doc?28713)
For products with tighter precision specification, see the
datasheet:
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.
• “High Precision MELF resistors”
(www.vishay.com/doc?28715)
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).
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, if applied, shall be qualified by
appropriate means to ensure the long-term stability of the
whole system.
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.
www.vishay.com
44
For technical questions, contact: melf@vishay.com
Document Number: 28714
Revision: 05-Mar-12
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
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