Proven wave soldering technology for through-hole and mixed-technology assemblies. Reliable solder joint quality for both leaded and lead-free processes.
Sunandmountain wave soldering systems deliver consistent solder joint quality across high-mix production runs. From compact SA-350 to wide-body SA-610, each system features dual-wave configuration, precise preheat control, and nitrogen inertion options for lead-free soldering. Selective wave soldering available for thermally sensitive or mixed-technology assemblies.
Full-Size Wave Soldering Machines
S&M wave soldering machines (SA-350, SA-450, SA-610) deliver consistent solder joint quality at throughputs of 2000-4000 boards per hour, with nitrogen models reducing dross formation by up to 60% compared to air atmosphere for through-hole assembly in consumer electronics, automotive, and industrial control applications.
SA-350 Wave Soldering
Max PCB width: 350mm
Compact dual-wave system for small-to-medium production runs. Ideal for prototype and batch assembly.
SA-450 Wave Soldering
Max PCB width: 450mm
Mid-range dual-wave system for medium-volume production. Enhanced preheat zone for improved thermal stability.
SA-610 Wave Soldering
Max PCB width: 610mm
Wide-body dual-wave system for large-panel production. Extended preheat and cooling zones for lead-free processes.
Selective Soldering
S&M selective wave soldering (SM-LI, SM-LII) solders individual through-hole components on mixed-technology boards without touching surrounding SMD areas, achieving wetting angles below 30 degrees and solder joint heights repeatable to ±0.5mm on complex PCB assemblies with minimum flux contamination to adjacent components.
SM-LII Selective Wave Soldering
Mini-wave selective
Targeted solder application for THT and mixed assemblies. Programmable mini-nozzle for precise solder placement without affecting nearby SMD components.
SMEMA Compliant Interface
All Sunandmountain Wave Soldering systems support standard SMEMA 1.0/2.0 signal communication (DC24V input/output) for seamless line integration with any SMEMA-compliant SMT equipment.
Find Your Wave Soldering System
Match your wave soldering configuration to three variables: board size (350, 450, or 610mm tunnel width), atmosphere requirement (air for standard THT, nitrogen for premium joints), and whether selective soldering is needed for mixed-technology boards with SMD on the same panel. All S&M wave solder machines are SMEMA-compliant for direct integration into existing SMT lines.
Frequently Asked Questions: Wave Soldering Machines
What’s the difference between wave soldering and selective soldering?
Standard wave soldering floods an entire PCB surface with molten solder — effective for through-hole components on one side of the board. Selective soldering uses a programmable mini-nozzle to solder individual through-hole components without touching surrounding SMD areas. If your board has mixed technology (SMT + through-hole), selective soldering prevents thermal shock and component damage that full-wave exposure would cause.
When is nitrogen atmosphere required for wave soldering?
Nitrogen (N2) atmosphere in wave soldering reduces oxidation of the solder wave and PCB pads, resulting in shinier, more reliable solder joints with fewer dross particles. N2 is recommended when: (1) using no-clean flux where oxidation affects probe testability, (2) producing LED modules where oxidation causes brightness loss, (3) assembling automotive electronics where cosmetic solder joint appearance is quality-critical, or (4) any application requiring IPC Class 3 solder joint reliability. Standard air wave is sufficient for most consumer electronics THT assembly.
What board sizes do S&M wave solder machines support?
S&M wave soldering machines cover three tunnel widths: SA-350 (350mm, ideal for small-to-medium boards used in consumer electronics and automotive modules), SA-450 (450mm, the most common size for EMS contract manufacturers), and SA-610 (610mm, for large PCB panels used in power electronics, industrial controls, and LED lighting). All models support board thickness from 0.6mm to 3.2mm and feature adjustable conveyor speed from 0.5 to 6.0 m/min.
What is the typical throughput for a wave soldering system?
Throughput depends on board size, solder pot temperature, and preheat settings. For a standard SA-450 operating at 260-280C with 1.8m/min conveyor speed, typical throughput is 300-600 boards per hour for boards in the 200x250mm range. The SA-610 with its wider tunnel can process 400-800 boards/hour at the same speed. Selective soldering (SM-LI/SM-LII) is slower — 80-150 boards/hour per soldering station — but eliminates the need for a full wave process on mixed-technology boards.
How do I integrate a wave solder machine into an existing SMT line?
All S&M wave solder systems are SMEMA 1.0/2.0 compliant (DC24V signal interface) for seamless upstream and downstream equipment communication. Standard line integration includes: conveyor height alignment to adjacent equipment (typically 850-950mm), optional in/out rail extensions for board buffering, and JSON-based MES integration for production data collection. Pre-heating zones (top and bottom IR) are independently controlled and support profiles for HASL, lead-free (SAC305), and high-temperature alloys.