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LEAD
FREE - ECOLOGICALLY FRIENDLY RESISTORS |
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The directive 2002/95/EC of European Parliament and
of the council dated 27th Jan, 2003 restricts the use of some hazardous
substances in electrical & electronic equipment from 1st July,
2006. |
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The substance which is restricted are as far as resistors
are concerned is as follows : |
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·
LEAD (Pb) |
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We are pleased to inform our customers particularly
in Europe that HTR is now ready to supply lead free - ecologically
friendly, so called “Green” resistors as soon as the customer
requires it. |
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OUR RESISTOR TERMINATIONS CAN BE |
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- Electroplated
Tin/Solder terminations (regular supply)
OR
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Lead free terminations which will be double coated
with pure tin having a high grade of whisker protection or electroplated
with pure tin having an underlayer of Nickel which provides a
very high grade of whisker protection.
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Our lead free resistor
terminations have been extensively tested for good solderability
with the existing tin/lead solders available in the market. |
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However, for the full compliance with the notification
it will be necessary for the manufacturer of electrical/electronic
products - our customers to not only use lead free components but
also to use lead free solders with their relevant fluxes. |
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These lead free solders will be alloys of tin/silver/copper
OR tin/silver/bismuth. |
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At HTR our lead free resistors are also
tested for solderability using a lead free alloy having composition
Tin-96.4%, Silver 3.2% & Copper 0.4%. As per recent studies it appears that the Tin/Silver/Copper alloy
gives the best results in terms of reliability but this solder has a
higher temperature to be used which is approximately 270°C as against
235°C for tin/lead solder and therefore the manufacturer of
electrical/electronic products will have to reset his soldering
process taking this into account which may involve change of soldering
equipment/parts and solder profile. |
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We at HTR are now ready to supply lead free terminations
on request. |
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In case a lead free part is required
instead of a standard supply part all the customr has to do is insert
a "*" after the type. |
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At HTR the "*" symbol is the sign for a
lead free part. |
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