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Low Temperature Solder Flux Coated Washer
Low Temperature Solder Flux Coated Washer

This product is made of a bismuth-based alloy that melts at a low temperature (138°C) and comes in a washer form with optimally coated flux. It melts at a specific temperature to form a highly reliable joint.

Features and Advantages

Low Temperature Soldering

Enables soldering at a lower temperature (138°C) than conventional methods, making it ideal for assembling heat-sensitive components such as sensors, LEDs, and batteries.

Integrated Structure

No need to apply flux separately, as the washer itself is coated with flux. Soldering can be performed simultaneously with bolt fastening or other methods, simplifying the process.

Consistent Soldering Quality

Precisely controlled amounts of solder and flux prevent under- or over-application, resulting in more uniform and higher-quality solder joints compared to conventional solder paste or wire.

High Reliability

Ensures perfect mechanical and electrical bonding for components requiring durable joints, providing high reliability.

Automation-Friendly

Melts and bonds automatically at a specific temperature, making it suitable for both manual and automated assembly processes, thereby enhancing productivity.

Main Applications

  • Components requiring temperature limitation in automotive and aerospace industries
  • Electronic device assembly (e.g., PCBs, sensors, semiconductor packaging, etc.)
  • Assembly and bonding of heat-sensitive parts with temperature constraints (e.g., lithium-ion batteries, OLED panels, plastics, thin-film materials, sensors, etc.)
  • Soldering processes for battery terminals, sensors, connectors
  • Joints requiring high reliability
Selecting the appropriate product based on the intended application or required specifications (e.g., melting point, coating thickness, material, etc.) is important.
Let us know your specific requirements and we’ll be happy to provide more tailored recommendations!

Size

Specification
Type Specification Remark
Rectangle Type S (Side)
Min = 0.5 mm
Max = 100 mm

T (Thickness)
Min = 0.05 mm
Max = 5 mm
Disc Type D (Diameter)
Min = 0.5 mm
Max = 100 mm

T (Thickness)
Min = 0.05 mm
Max = 5 mm
Window Type IS (In Side)
Min = 0.5 mm
Max = 99 mm

OS (Out Side)
Min = 1.5 mm
Max = 100 mm

T (Thickness)
Min = 0.05 mm
Max = 5 mm
Washer Type OD (Outside Diameter)
별도 협의
ID (Inside Diameter)
별도 협의

T (Thickness)
Min=0.05mm
Max=10mm

Alloy

Alloy
    Sn Ag Cu Bi Pb Melting P.
Lead - Free SAC305 96.5 3.0 0.5 - - 217 - 219
Sn96.5Ag3.5 96.5 3.5 - - - 217
SACX(SAC0807) 98.5 0.8 0.7 - - 217 - 228
SACX(SAC0307) 99.0 0.3 0.7 - - 219 - 229
SAC357 95.8 3.5 0.7 - - 217
SAC387 95.5 3.8 0.7 - - 217
SAC405 95.5 4.0 0.5 - - 217 - 218
Low - T SnBi57.6Ag0.4 42 0.4 - 57.6 - 138
Tin - Lead Sn63PB37 63.0 - - - 37.0 183
Sb62Pb36Ag2 62.0 2.0 - - 36.0 179 - 182
Sn62.8Pb36.8Ag0.4 62.0 0.4 - - 36.8 179 - 183