Sn95.5Ag4.0Cu0.5

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Sn95.5Ag4.0Cu0.5 (SAC 405) Solder Balls

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SAC405 Solder Balls (Sn95.5Ag4.0Cu0.5)

SAC405 (Sn95.5Ag4.0Cu0.5) solder balls are a high-silver, lead-free tin-silver-copper alloy used for BGA and CSP ball attach where added joint strength is required. EasySpheres supplies SAC405 solder spheres in multiple diameters for prototype and production applications, in conformance with IPC J-STD-006, with a Certificate of Conformance on every order.

SAC405 Solder Sphere Specifications

  • Alloy: Sn95.5Ag4.0Cu0.5 (SAC405), lead-free
  • Applications: BGA and CSP ball attach, BGA rework, high-reliability assemblies
  • Melting range: 217 °C solidus, 220 °C liquidus
  • Stock diameters: 0.050 mm to 0.889 mm range; listed SAC405 diameters on this page: 0.200, 0.250, 0.350, 0.400, 0.450, 0.600, 0.635, 0.760, and 0.889 mm, each with its own part number
  • Dimensional tolerance: Maximum dimensional tolerance ±4% (typical measured ±0.50% for 0.050 to 0.450 mm, ±1% for 0.500 to 0.550 mm, ±0.83% for 0.600 to 0.889 mm); sphericity deviation less than 1.5%; inspection illuminance greater than 270 lux.
  • Quality: Alloy purity in conformance with IPC J-STD-006 (composition per J-STD-006C); Certificate of Conformance ships with every order.
  • Compliance: RoHS-compliant (Directive 2011/65/EU as amended by (EU) 2015/863) and REACH-compliant; declarations available on request.
  • Packaging: Medical-grade, ESD-safe containers designed to resist the surface darkening caused by transit tumbling, reducing machine-vision faults in automated ball placement systems; QR-coded for lot conformance traceability and shipping accuracy.
  • Shelf life: Two years from the date of shipment from the EasySpheres facility (product held sealed in controlled inert storage until shipped).
  • Minimum order: 10,000 spheres

EasySpheres warrants this product to be defect free, with alloy purity in compliance of IPC-JSTD-006 guidelines.

Size deviation shall not be greater than:
± 0.010% for sizes .0.004" ~ 0.018" (0.100mm~0.450mm)
± 0.015% for Sizes 0.020" ~ 0.022" (0.500mm~0.550mm)
± 0.020% for Sizes 0.024" ~ 0.035" (0.600mm~0.889mm)

Shelf life of 1 year is guaranteed by EasySpheres from date of purchase.

Frequently Asked Questions

What is SAC405 solder?

SAC405 is the lead-free tin-silver-copper alloy Sn95.5Ag4.0Cu0.5: 95.5% tin, 4.0% silver, and 0.5% copper. It is used for BGA and CSP ball attach where a higher-silver alloy is specified.

What is the melting range of SAC405?

SAC405 has a solidus of 217 °C and a liquidus of 220 °C, a narrow near-eutectic range similar to SAC305.

How does SAC405 differ from SAC305?

SAC405 contains 4.0% silver versus 3.0% in SAC305; both contain 0.5% copper. The higher silver content can add joint strength and creep resistance, typically at higher alloy cost. Choose SAC305 for most BGA assembly and rework; choose SAC405 where the design specifies it.

Which SAC405 diameters are available?

This page lists SAC405 spheres from 0.200 mm to 0.889 mm with corresponding part numbers. EasySpheres stocks diameters across the 0.050 to 0.889 mm range; contact EasySpheres for a size not listed.

Does SAC405 ship with a Certificate of Conformance?

Yes. Every SAC405 order ships with a Certificate of Conformance covering alloy composition, solidus and liquidus, size distribution, and sphericity.

Why Buy Solder Spheres from EasySpheres

Ordering and Support FAQs

Can I order SAC405 solder spheres in small quantities?

Yes. EasySpheres supplies SAC405 solder spheres with a minimum order of 10,000 spheres and scales to production volumes. Request a quote for larger requirements.

How quickly do SAC405 solder spheres ship?

Most in-stock orders placed before 2:00 PM Pacific ship the same day; other orders ship within 24 hours. EasySpheres maintains a greater-than-95% on-time delivery record.

What documentation ships with SAC405 solder spheres?

A Certificate of Conformance ships with every order, covering alloy composition, solidus and liquidus, size distribution, and sphericity. The technical data sheet and SDS are available on the product page, and standard quality documentation is available on request.

What is the shelf life of SAC405 solder spheres?

The stated shelf life is two years from the date of shipment from the EasySpheres facility. Prior to shipment the product is retained in its original sealed packaging within a controlled inert storage environment designed to minimize exposure to moisture, oxygen, and contaminants.

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