CMB 0207

www.vishay.com

Vishay Beyschlag

Revision: 11-Feb-16

3

Document Number: 28755

For technical questions, contact: melf@vishay.com

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

DESCRIPTION

Production of the CMB 0207 specialty MELF resistor is

strictly

controlled

and

follows

an

extensive

set

of

instructions established for reproducibility. A homogeneous

and dense carbon film is deposited on a high grade ceramic

body (Al2O3). Nickel plated steel termination caps are firmly

pressed on the coated rods. Products with a resistance of

15

 or lower are made without trimming, whereas a special

laser is used to achieve a target value of 16

 or above

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 matte tin on nickel plating. Four or five

color code rings designate the resistance value and

tolerance in accordance with IEC 60062 (1).

The result of the determined production is verified by an

extensive testing procedure performed on 100 % of the

individual resistors. Only accepted products are laid directly

into the blister tape in accordance with IEC 60286-3,

Type 2a (1).

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

IEC 61760-1 (1)

. 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.

The resistors are completely lead (Pb)-free, the pure matte

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,

potting

compounds

and

their

processes, if applied, shall be qualified by appropriate

means to ensure the long-term stability of the whole system.

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MATERIALS

Vishay acknowledges the following systems for the

regulation of hazardous substances:

• IEC 62474, Material Declaration for Products of and for the

Electrotechnical Industry, with the list of declarable

substances given therein (2)

• The

Global

Automotive

Declarable

Substance

List

(GADSL) (3)

• The REACH regulation (1907/2006/EC) and the related list

of substances with very high concern (SVHC) (4) for its

supply chain

The products do not contain any of the banned substances

as per IEC 62474, GADSL, or the SVHC list, see

www.vishay.com/how/leadfree.

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Hence the products fully comply with the following

directives:

• 2000/53/EC End-of-Life Vehicle Directive (ELV) and

Annex II (ELV II)

• 2011/65/EU

Restriction

of

the

Use

of

Hazardous

Substances

Directive

(RoHS)

with

amendment

2015/863/EU

• 2012/19/EU Waste Electrical and Electronic Equipment

Directive (WEEE)

Vishay pursues the elimination of conflict minerals from its

supply

chain,

see

the

Conflict

Minerals

Policy

at

www.vishay.com/doc?49037.

APPROVALS

Where applicable the resistors are tested in accordance with

EN 140401-803 which refers to EN 60115-1, EN 60115-8

and the variety of environmental test procedures of the

IEC 60068 (1) series.

Vishay

Beyschlag

has

achieved

“Approval

of

Manufacturer” in accordance with IECQ 03-1. The release

certificate

for

“Technology

Approval

Schedule”

in

accordance with CECC 240001 based on IECQ 03-3-1 is

granted for the Vishay Beyschlag manufacturing process.

The resistors are qualified according to AEC-Q200.

RELATED PRODUCTS

• “Professional Thin Film MELF Resistors”



(www.vishay.com/doc?28713)

• “Precision Thin Film MELF Resistors”



(www.vishay.com/doc?28714)

• “High Pulse Load Carbon Film MINI-MELF Resistors of

case size 0204” (www.vishay.com/doc?28717)

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Notes

(1) The quoted IEC standards are also released as EN standards with the same number and identical contents.

(2) The IEC 62474 list of declarable substances is maintained in a dedicated database, which is available at http://std.iec.ch/iec62474.

(3) The Global Automotive Declarable Substance List (GADSL) is maintained by the American Chemistry Council and available at

www.gadsl.org.

(4) The SVHC list is maintained by the European Chemical Agency (ECHA) and available at http://echa.europa.eu/candidate-list-table.