MMA 0204 HT Professional

www.vishay.com

Vishay Beyschlag

Revision: 08-Jul-15

3

Document Number: 28780

THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT

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

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. 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 and tolerance in

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

ASSEMBLY

The resistors are suitable for processing on automatic SMD

assembly systems. They are suitable for automatic

soldering using wave, reflow or vapor phase as shown in

after 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

IEC 62474,

Material

Declaration for Products of and for the Electrotechnical

Industry.

ensures 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)

• 2012/19/EU Waste Electrical and Electronic Equipment

Directive (WEEE)

Solderability is specified for 2 years after production or

requalification. The permitted storage time is 20 years.

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

Manufacture” 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

A wider range of TCR, tolerance and resistance values, plus

the option of values from a different E series is available with

products approved to EN 140401-803, Version A, without

established reliability, nominal failure rate level E0 (Quality

factor



• “Professional MELF Resistors”



• “Precision MELF Resistors”



• “High Precision MELF Resistor”



For products with superior pulse load capability, see the

datasheets:

• “High Pulse Load Carbon Film MINI-MELF Resistor”

• “High

Pulse

Load

Carbon

Film

MELF

Resistor”

Notes