Document Number: 28713

www.vishay.com

Revision: 05-Mar-12

21

MMU 0102, MMA 0204, MMB 0207 - Professional

Professional MELF Resistors

Vishay Beyschlag

This document is subject to change without notice.

TEST AND REQUIREMENTS

All tests are carried out in accordance with the following

specifications:

EN 60115-1, generic specification

EN 140400, sectional specification

EN 140401-803, detail specification

The components are approved in accordance with the

IECQ-CECC-system, where applicable. For the full test

schedule refer to the documents listed above. The testing

also

covers most of the requirements specified by

EIA/IS-703 and JIS-C-5202.

The tests are carried out under standard atmospheric

category LCT/UCT/56 (rated temperature range: Lower

category temperature, upper category temperature; damp

heat, steady state, test duration 56 days) is valid.

Unless otherwise specified the following values apply:

Temperature: 15 °C to 35 °C

Relative humidity: 45 % to 75 %

Air pressure: 86 kPa to 106 kPa (860 mbar to 1060 mbar).

The components are mounted for testing on printed-circuit

boards in accordance with EN 140400, 2.3.3, unless

otherwise specified.

The requirements stated in the Test Procedures and

Requirements table are based on the required tests and

permitted

limits

of

EN 140401-803.

However,

some

additional tests and a number of improvements against those

minimum requirements have been included. The stated

requirements for long-term tests are typically fulfilled with a

statistical safety of at least

+ 5 s.

x

TEST PROCEDURES AND REQUIREMENTS

EN

60115-1

CLAUSE

IEC

TEST

METHOD

TEST

PROCEDURE

REQUIREMENTS

PERMISSIBLE CHANGE (

R)

STABILITY

CLASS 0.25

OR BETTER

STABILITY

CLASS 0.5

OR BETTER

STABILITY

CLASS 1

OR BETTER

STABILITY

CLASS 2

OR BETTER

Stability for

product types:

MMU 0102

10

 to 221k

1

 to < 10 

< 1



> 221 k



MMA 0204

10

 to 332 k

1

 to < 10 

< 1



> 332 k



MMB 0207

10

 to 1 M

1

 to < 10 

< 1



> 1 M



4.5

-

Resistance

-

± 1 %

R; ± 0.5 % R

± 2 %

R;± 1 % R

± 5 %

R

± 1 %

R

4.8.4.2

-

Temperature

coefficient

At (20/- 55/20) °C

and

(20/125/20) °C

±

50 ppm/K; ± 25 ppm/K

4.25.1

-

Endurance

at 70 °C:

Standard

operation

mode

U =



U

1.5 h on; 0.5 h off;

70 °C; 1000 h

± (0.15 %

R + 10 m

)±(0.5 % R + 10 m)

70 °C; 8000 h

±

(0.3 % R + 10 m)± (1 % R +10 m)

Endurance

at 70 °C:

Power

operation

mode

U =



U

1.5 h on; 0.5 h off;

70 °C; 1000 h

±

(0.25 % R + 10 m)

± (0.5 %

R + 10 m

)

70 °C; 8000 h

±

(0.5 % R + 10 m)±(1 % R + 10 m)

4.25.3

-

Endurance at

upper

category

temperature

125 °C; 1000 h

± (0.15 %

R +5 m

) ± (0.25 % R +5 m)± (0.5 % R +5 m)+ (1 % R +5 m)

155 °C; 1000 h

±

(0.3 % R +5 m)±(0.5 % R +5 m)± (1 % R +5 m)+ (2 % R +5 m)

4.24

78 (Cab)

Damp heat,

steady state

(40 ± 2) °C;

56 days;

(93 ± 3) % RH

±

(0.15 % R +10 m) ±(0.5 % R + 10 m)±(1 % R + 10 m)± (1 % R +10 m)

P

P