Lead-Free Initiative

The history of soldering goes back some 5,000 years, but fundamental soldering has always used Sn-Pb series solder that consists of tin and lead. However, lead pollution ground water has been recognized as an environmental problem and complete elimination of the use of lead is called for. Realizing that protection of our environment is our task in the 21st century, SMIC has earnestly extended our research in this area and developed Lead-Free "ECO SOLDER ". Please contact us for any problem that relates to Lead-Free soldering. We are thoroughly prepared to introduce Lead-Free soldering system as we have a comprehensive technology base and have constructed support systems in various phases with ECO Soldering Solution.

* SMIC, ECO SOLDER, ECO Soldering Solution, ECOtronics and logotypes are trademarks or registered trademarks of Senju Metal Industry Co., Ltd.

JIS Z 3282 / ISO9453: Chemical composition of lead-free solders

ClassSymbolSMIC Item
12
Sn 96.5
Ag 3
Cu 0.5		Sn 96.5
Ag 3
Cu 0.5		A30C5M705
Chemical Composition Mass％
SnPbSbBiCuAuInAgAlAsCdFeNiZn
Remain0.05
max		0.10
max		0.10
max		0.3
to
0.7		0.05
max		0.10
max		2.8
to
3.2		0.001
max		0.03
max		0.002
max		0.02
max		0.01
max		0.001
max

ECO SOLDER

Lead-Free ECO SOLDER developed by SMIC offers high soldering reliability compared with the Sn-Pb series solder of the past and is available in a wide product lineup according to the required soldering temperature.E series（antioxident type）and automatic feeding type for solder bath are also available.Product availability may be limited for certain alloycompositions. Please select the appropriate product from the ECO SOLDER Products Guide below.

ECO SOLDER Products Guide

ECO
SOLDER		Alloy composition (wt%)Temp. (°C)Form
Solidus
line		PeakLiquidus
line		BARCOREBALLPASTEPRE
FORM
M-series: Solidus line temp. 200 to 250 °C
M705Sn-3.0Ag-0.5Cu217219220Available Available Available Available Available
M30Sn-3.5Ag221223223Available Available Available Available Available
M31Sn-3.5Ag-0.75Cu218219219Available Available Available Available Available
M714Sn-3.8Ag-0.7Cu217219225Available Available Available Available Available
M715Sn-3.9Ag-0.6Cu217219226Available Available Available Available Available
M710Sn-4.0Ag-0.5Cu217219229Available Available Available Available Available
M34Sn-1.0Ag-0.5Cu217219227Available Available Available Available Available
M771Sn-1.0Ag-0.7Cu217219224Available Available Available Available Available
M35Sn-0.3Ag-0.7Cu217219227Available Available Available Available Available
M20Sn-0.75Cu227229229Available Available Available Available Available
M24MTSn-0.7Cu-Ni-P-Ge228230230Available Available 　　Available
M24APSn-0.6Cu-Ni-P-Ge227228228Available Available 　　Available
M40Sn-1.0Ag-0.7Cu-Bi-In211222222　Available 　Available 　
M47Sn-0.3Ag-0.7Cu-0.5Bi-Ni216228228　Available 　Available 　
M773Sn-0.7Cu-0.5Bi-Ni225229229Available Available 　Available 　
M53Sn-3.0Ag-3.0Bi-3.0In198214214　Available 　Available Available
M794Sn-3.4Ag-0.7Cu-3.2Bi-3.0Sb-Ni-x209221221  
M731Sn-3.9Ag-0.6Cu-3.0Sb221224226Available Available 　Available Available
M716Sn-3.5Ag-0.5Bi-8.0In197208214　Available 　Available 　
M10Sn-5.0Sb240243243Available Available Available Available Available
M14Sn-10Sb245248266Available Available Available Available Available
M709Sn-0.5Ag-6.0Cu217226378Available 　　　　
M760Sn-5.0Cu-0.15Ni228229365Available 　　　　
M711Sn-0.5Ag-4.0Cu217226344Available 　　　　
M60Sn-2.3Ag-Ni-Co221222225　　Available 　　
M770Sn-2Ag-Cu-Ni218220224　　Available Available 　
M758Sn-3Ag-3Bi-0.8Cu-Ni205215215　　Available Available Available
M84Sn-3.0Ag-0.5Cu-Ni219223324　Available 　　　
M85Sn-0.3Ag-2.0Cu-Ni218231332　Available 　　　
M86Sn-0.3Ag-0.7Cu-Ni220232330　Available 　　　
L-series: Solidus line temp. under 200 °C
L20Sn-58Bi139141141Available Available Available Available Available
L23Sn-57Bi-1.0Ag138140204Available Available Available Available Available
  • Peak temp. : Max. endothermic reaction point on DSC curve.
  • Some alloy compositions may not be available in certain forms with special product size and grade.
  • For inquiries regarding alloy compositions not listed above, please contact our sales representative or through our web site.
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