Document Number: 28713

www.vishay.com

Revision: 05-Mar-12

17

MMU 0102, MMA 0204, MMB 0207 - Professional

Professional MELF Resistors

Vishay Beyschlag

This document is subject to change without notice.

Notes

• Resistance ranges printed in bold are preferred TCR/tolerance combinations with optimized availability.

• Resistance values to be selected for ± 5 % and ± 2 % tolerance from E24, for ± 1 % tolerance from E24 and E96 and for ± 0.5 % tolerance

from E24 and E192.

DESCRIPTION

Production 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

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.

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.

Four or five color code rings designate the resistance value

The result of the determined production is verified by an

extensive testing procedure performed on 100 % of the

individual resistors. This includes pulse 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

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

production or requalification, however, excellent solderability

is proven after extended storage in excess of 10 years. The

permitted storage time is 20 years.

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.

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.

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)

 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

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

Vishay Beyschlag manufacturing process.

The resistors are qualified according to AEC-Q200.

RELATED PRODUCTS

For products with precision specification see the datasheet:

• “Precision MELF Resistors”

• “High Precision MINI-MELF Resistor”

Resistors are available with established reliability in

accordance with EN 140401-803 Version E. Please refer to

datasheet “MELF Resistors with Established Reliability”

Notes

 issues  environment policy  chemicals  chemicals for electronics.

TEMPERATURE COEFFICIENT AND RESISTANCE RANGE

DESCRIPTION

RESISTANCE

TCR

TOLERANCE

MMU 0102

MMA 0204

MMB 0207

± 100 ppm/K

± 5 %

-

-

0.1

 to 0.2 

± 50 ppm/K

± 5 %

0.22

 to 0.91 

0.22

 to 0.91 

0.22

 to 0.91 

± 2 %

1

 to 9.1 

-0.2

 to 0.91 

± 1 %

10

 to 2.21 M

1

 to 10 M

1

 to 15 M

± 0.5 %

10

 to 221 k

10

 to 2.21 M

-

± 25 ppm/K

± 1 %

10

 to 221 k

10

 to 511 k

-

± 0.5 %

10

 to 221 k

10

 to 511 k

10

 to 1 M

Jumper

10 m; I

10 m, I

10 m; I