SMT reflow soldering equipment for EMS and OEM factories
Reflow Ovens for Stable SMT Soldering and Higher Line Uptime
S&M reflow ovens are built for factories that need repeatable temperature profiles, stable conveyor speed, and practical line integration. The range covers air reflow ovens, nitrogen reflow ovens, dual-track reflow ovens, mesh-belt and wide-body models, vacuum reflow, and custom configurations.
What Is a Reflow Oven?
A reflow oven solders surface-mount components by heating solder paste through controlled thermal zones. In a typical SMT line, solder paste is printed on the PCB, components are placed by pick-and-place machines, and the assembled board passes through the reflow oven.
The key is not simply reaching a high temperature. The oven must keep a stable preheat, soak, reflow, and cooling profile so the solder joints are repeatable across shifts, board sizes, and production batches.
What Is a Reflow Oven Used For?
SMT Soldering
For soldering chip components, ICs, connectors, LEDs, modules, and other surface-mount parts after solder paste printing and placement.
High-Mix EMS Production
For factories that change products often and need recipe storage, repeatable conveyor speed, and controlled heating zones.
Demanding Electronics
For automotive, industrial control, power electronics, communication, LED, and consumer electronics boards that need stable solder joints.
Different Types of S&M Reflow Ovens
This section is based on real S&M product pages. It does not include product types that are not currently listed on the website.
Air Reflow Ovens
DS-0802, DS-1003, DS-1204, VS-0802, VS-1003, VS-1204
For standard SMT soldering where nitrogen is not required.
Nitrogen Reflow Ovens
DS-0802-N, DS-1003-N, DS-1204-N, VS-0802-N, VS-1003-N, VS-1204-N
For low-oxidation lead-free soldering and more demanding wetting requirements.
Dual-Track Reflow Ovens
DS-0802D, DS-1003D, DS-1204D, VS-0802D, VS-1003D, VS-1204D
For parallel board transport and higher throughput in matched SMT lines.
Dual-Track Nitrogen
DS-0802D-N, DS-1003D-N, DS-1204D-N, VS-0802D-N, VS-1003D-N, VS-1204D-N
For high-throughput lines that also need nitrogen process support.
Mesh Belt / Wide-Body
For wider or special board transport requirements where standard chain transport is not the best fit.
Vacuum / Custom Reflow
VTS-1013-N, Custom Reflow Oven Solutions
For void reduction, special profiles, custom PCB width, or line-specific engineering requirements.
Air reflow oven for standard SMT soldering.
Nitrogen reflow oven for low-oxidation lead-free process.
Vacuum reflow oven for demanding solder joint quality.
Air vs Nitrogen vs Vacuum Reflow
| Requirement | Air Reflow | Nitrogen Reflow | Vacuum Reflow |
|---|---|---|---|
| Best for | Standard SMT production | Lead-free boards needing better wetting and oxidation control | Boards where void reduction and solder joint reliability are critical |
| Cost level | Lower operating cost | Higher process cost due to N₂ consumption | Higher equipment/process complexity |
| Typical model groups | DS / VS air models | DS-N / VS-N nitrogen models | VTS-1013-N |
| Decision point | Choose when standard profile control is enough | Choose when oxidation, wetting, or dross-related quality risk matters | Choose when voiding and high-reliability solder joints drive the project |
How to Choose a Reflow Oven
PCB and Product Mix
- Maximum PCB width and length
- Board thickness and weight
- Component height
- Thermal mass and product mix
Process Requirement
- Air, nitrogen, or vacuum process
- Lead-free solder paste
- Required temperature profile
- Void and wetting targets
Line Throughput
- Target UPH
- Conveyor speed
- Single-track or dual-track layout
- SMEMA line integration
Selection Table
| Customer Requirement | Recommended S&M Product Group | Model Options |
|---|---|---|
| Standard SMT soldering, compact or mid-volume line | 8-zone air reflow oven | DS-0802 / VS-0802 |
| More thermal capacity and wider process window | 10-zone or 12-zone air reflow oven | DS-1003 / DS-1204 / VS-1003 / VS-1204 |
| Lead-free production with better oxidation control | Nitrogen reflow oven | DS-0802-N / DS-1003-N / DS-1204-N / VS-N series |
| Higher throughput with parallel board transport | Dual-track reflow oven | DS-D / VS-D air or nitrogen series |
| Large board or special transport requirement | Mesh belt / wide-body reflow oven | VS-1003W / VS-1204W |
| Void-sensitive or high-reliability assemblies | Vacuum reflow oven | VTS-1013-N |
| Special PCB size, layout, or utility requirement | Custom reflow oven | Custom Reflow Oven Solutions |
Current model program · air, nitrogen, dual-track, wide-body and vacuum
Reflow Oven Product Program
Use this program to narrow the model family before engineering checks the final oven against PCB size, thermal process, target UPH, factory layout and utilities. The PDF provides a current two-page selection overview; individual model pages contain the detailed specifications.
| Program | Representative models | Choose when |
|---|---|---|
| DS air | DS-0802, DS-1003, DS-1204 | Standard lead-free SMT reflow without nitrogen. |
| DS nitrogen | DS-0802-N, DS-1003-N, DS-1204-N | Oxidation control or nitrogen processing is required. |
| DS dual-track | DS-0802D / DS-1003D / DS-1204D and N versions | Two-lane transport matches board mix and throughput. |
| VS standard | VS-0802 / VS-1003 / VS-1204 and N versions | A broad air or nitrogen model range is needed. |
| VS dual-track | VS-0802D / VS-1003D / VS-1204D / VS-1303D-N | Parallel transport or extended heating-zone options are required. |
| Wide / extended | VS-1003W, VS-1204W, VS-1504-N | Wide products, mesh-belt transport or extended-zone processing. |
| Vacuum | VTS-1013-N | Voiding control requires an independent vacuum stage. |
Selection path
S&M Reflow Oven Models
DS-0802 / VS-0802
8-zone air reflow ovens for compact SMT lines and small-to-medium batch production.
DS-1003 / VS-1003
10-zone air reflow ovens for stronger thermal control and regular EMS/OEM production.
DS-1204 / VS-1204
12-zone air reflow ovens for longer profiles and more demanding boards.
DS-0802-N / VS-0802-N
8-zone nitrogen reflow for compact lead-free production with N₂ process support.
DS-1003-N / VS-1003-N
10-zone nitrogen reflow for stable wetting and lower oxidation risk.
DS-1204-N / VS-1204-N / VS-1504-N
12 to 15-zone nitrogen ovens for demanding thermal profiles and higher process stability.
DS-0802D / DS-1003D / DS-1204D
Dual-track air reflow for parallel transport and higher line throughput.
DS-0802D-N / DS-1003D-N / DS-1204D-N
Dual-track nitrogen reflow when both throughput and N₂ process support are required.
VS-1003W / VS-1204W
Mesh-belt and wide-body options for wider or special board handling requirements.
VTS-1013-N
12-zone nitrogen vacuum reflow for void-sensitive and reliability-focused applications.
Custom Reflow Oven
Custom zone count, PCB width, conveyor layout, utilities, and optional configurations.
Key Technical Data Confirmed From Product Pages
| Model Group | Confirmed Data | Notes |
|---|---|---|
| DS air series | Top/bottom 8, 10, or 12 heating zones; two-stage, three-stage, or four-stage cooling; PC + PLC + PID control. | Model examples: DS-0802, DS-1003, DS-1204. |
| DS nitrogen series | Top/bottom 8, 10, or 12 heating zones; each heating zone has N₂ filling port; full-zone N₂ filling supported. | Model examples: DS-0802-N, DS-1003-N, DS-1204-N. |
| Standard DS transport data | PCB width 50–400 mm, optional 50–610 mm; component height top 22 mm / bottom 25 mm; conveyor speed 400–2000 mm/min. | Common data confirmed on DS air and DS nitrogen product pages. |
| VTS-1013-N vacuum reflow | Heating zone length 3420 mm; independent vacuum zone; PCB size 70×50 mm to 300×350 mm; approx. 3400 kg. | For vacuum-assisted reflow and high-reliability solder joints. |
| VTS-1013-N transport | Conveyor speed 200–2400 mm/min; conveyor height 900 ± 20 mm; process edge standard 5 mm, customizable. | Max component height: top 25 mm / bottom 15 mm. |
| Custom reflow oven | Zone count, PCB width, conveyor configuration, utilities, and optional configuration defined per project. | Use when standard DS/VS/VTS models do not fit the board or line layout. |
Exact configuration can change by order. For quotation, confirm PCB size, thermal profile requirement, nitrogen or vacuum requirement, target UPH, line direction, voltage, and destination country.
Where It Fits in the SMT Line
Typical SMT production line:
For mixed SMT + THT production:
Common Problems This Equipment Solves
- Temperature profile is unstable across different PCB sizes or shifts.
- Lead-free soldering has wetting problems, oxidation, or insufficient solder joint consistency.
- Line throughput is limited by single-track transport or slow conveyor speed.
- Large boards or special transport requirements do not fit a standard reflow oven.
- Void-sensitive products need vacuum-assisted reflow.
- Multiple suppliers make it difficult to match loaders, conveyors, reflow oven, AOI, buffers, and unloaders.
Why Choose S&M for Reflow Ovens?
S&M manufactures soldering equipment and PCB handling equipment in-house. That matters because a reflow oven is not an isolated machine. It must match the line height, board width, conveyor direction, target UPH, upstream printer and placement machines, downstream AOI, buffers, and unloaders.
- Real model range covering air, nitrogen, dual-track, mesh-belt, wide-body, vacuum, and custom reflow.
- Standard 50–400 mm PCB width with optional wider configurations on selected models.
- PC + PLC + PID control on confirmed DS series pages.
- Integration with PCB loaders, unloaders, conveyors, buffers, wave soldering, and curing equipment.
- International-quality build standard with local pricing and full in-house production.
FAQ
What is a reflow oven used for?
A reflow oven is used to solder surface-mount components onto PCBs by heating solder paste through controlled thermal zones.
How do I choose between 8-zone, 10-zone, and 12-zone reflow ovens?
Choose by PCB size, thermal mass, solder paste profile, throughput target, and required process window. Larger or more demanding boards usually need more heating and cooling control.
When should I choose nitrogen reflow?
Choose nitrogen reflow when lead-free soldering quality, wetting stability, oxidation control, or solder joint consistency is a key concern.
When is vacuum reflow necessary?
Vacuum reflow is used when void reduction and high-reliability solder joints are important, such as power electronics, automotive electronics, and other demanding assemblies.
What information is needed for a quotation?
Send maximum PCB size, component height, solder paste type, product mix, target UPH, line direction, nitrogen or vacuum requirement, voltage, factory layout, and destination country.
Can S&M configure the oven for my existing SMT line?
Yes. Send the line layout, upstream and downstream machine information, conveyor height, board flow direction, target UPH, and PCB size range. S&M can recommend a practical configuration.
Need Help Choosing the Right Reflow Oven?
Send your PCB size, component height, solder paste process, target UPH, line layout, and nitrogen or vacuum requirement. S&M will recommend a practical reflow oven configuration for your production line.