LEAD-FREE SOLDER PASTE

Since the RoHS regulation has been in force, electronic assemblies for most applications must be manufactured lead-free. SAC305 has become the standard alloy in this regard. Currently, it is the optimal and most widely used alloy for most applications. Its silver content of 3% ensures good wetting properties. To optimize costs, other alloys with lower silver content are used as well, but more commonly in the consumer sector.

Melting point of lead-free solder paste

In the production process, the high melting range of the SAC305 alloy can sometimes be problematic. The required high peak temperatures can lead to a thermal overload in the production of some parts. Therefore, for temperature-critical components, the use of low-temperature solder pastes can be necessary.

Solder paste recommendations

Most of our solder pastes are no-clean solder pastes. That means that the flux residues can remain at the solder joint after soldering. Our general recommendation is the NP303-COSMO-LH-T4 solder paste or NP303-COSMO-LH-T5 depending on the stencil thickness. If cleaning does become necessary, with these solder pastes, the flux residues can easily be removed.

Advantage of lead-free solder paste

The big advantage is that the solder paste no longer contains lead, a toxic heavy metal. Especially if disposed improperly, lead enters the environment and damages the nervous system, impairs the formation of blood, causes gastrointestinal health problems, kidney damage, and is reprotoxic.

Clear filters
Flux classification
Applications
Powder size
Alloys

Alloy: Sn 96,5 / Ag 3,0 / Cu 0,5 / SAC305

NP303-COSMO-LH-T4

Halide free type 4 SMD solder paste with excellent wetting properties

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NP303-COSMO-LH-T5

Halide free type 5 SMD solder paste for extremely fine structures with excellent wetting properties

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Solder paste lead free - GENMA Europe GmbH

NP303-COSMO-ZQ-C

Our top product – ROL1 SMD solder paste with the best printing and soldering properties

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Solder paste lead free - GENMA Europe GmbH

NP303-CQS-1

Halide free SMD solder paste with excellent printing and soldering properties

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Solder paste lead free - GENMA Europe GmbH

NP303-CQS-2

ROL0 SMD solder paste with higher viscosity and excellent printing and soldering properties

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Solder paste lead free - GENMA Europe GmbH

NP303-ZYA-1

Type 5 SMD solder paste for extremely fine structures

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NP303-TP100-T6

Type 6 SMD solder paste for extremely fine structures with excellent wetting properties

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NP303-GM855-T4-D

Solder paste with optimized wetting properties for oxidized- and nickel surfaces

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Solder paste lead free - GENMA Europe GmbH

NP303-PLD155-GQ

Our special SMD solder paste for pin-in-paste applications

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Solder paste lead free - GENMA Europe GmbH

NP303-WS4070-T4

Type 4 solder paste with water soluble flux

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Solder paste lead free - GENMA Europe GmbH

NP303-WS4070-T5

Type 5 solder paste with water soluble flux

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Solder paste lead free - GENMA Europe GmbH

NP303-WS4070-T6

Type 6 solder paste with water soluble flux

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Solder paste lead free - GENMA Europe GmbH

NP303-WS7157-GT7

Type 7 solder paste with water soluble flux

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Solder paste lead free - GENMA Europe GmbH

NP303-WS7157-GT8

Type 8 solder paste with water soluble flux

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Solder paste lead free - GENMA Europe GmbH

NP303-LD155-GQ

SMD solder paste with very little flux residues

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Solder paste can and cartridge lead free - GENMA Europe GmbH

NP303-MF155-GQ

High thixotropic SMD solder paste with good printing and dispensing properties

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Dispenser solder paste in cartridges - GENMA Europe GmbH

NP303-LHY-LS T5

SMD dispenser solder paste for laser or reflow soldering

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winDot S-005-NP303 T5

SMD Jet dispenser solder paste Type 5 for jet dispensing

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winDot B-005-NP303 T6

Jetting solder paste Type 6 for jet dispensing

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winDot F-005-NP303 T7

SMD jet dispenser solder paste. Type 7. Dot diameters of 130µm possible

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Alloy: Sn 90,0 / Ag 3,5 / In 6,0 / Bi 0,5

Solder paste lead free - GENMA Europe GmbH

NP406-MGM555-GK

Indium SMD solder paste for highest reliability with a significant lower melting point than SAC305

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Solder paste lead free - GENMA Europe GmbH

NP406-MGM555-GQ

Indium SMD solder paste for highest reliability with a significant lower melting point than SAC305

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Alloy: Sn 98,3 / Ag 1,0 / Cu 0,7 / SAC107

Solder paste lead free - GENMA Europe GmbH

NP110-COSMO-ZQ-C

Silver-reduced SMD solder paste with excellent printing and soldering properties

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Alloy: Sn 42 / Bi 58

SB58-COSMO-NH-T4

Low-temperature solder paste for the second reflow solder process or extremely temperature-sensitive components

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Alloy: Sn 42,6 / Bi 57 / Ag 0,4

Solder paste lead free - GENMA Europe GmbH

SB6-HLGQ-MSD

SMD Low-temperature solder paste for pin-in-paste applications with a second reflow solder process or for very temperature-sensitive components

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Alloy: Sn 91 / Ag 4 / Cu 1 / Bi 3 / Sb 1

Solder paste lead free - GENMA Europe GmbH

SAB43-LHS-GQ-1

SMD solder paste with high reliability and higher melting temperature

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