Sn96.5Ag3.0Cu0.5 (SAC 305) Solder Balls
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* In Stock items ordered by 2:00 Pacific Time Ship same day !
* Selected sizes chosen below are in STOCK and will ship immediately.
Buy in Quantity and Save!
* For 1,000,000 Spheres you receive an 88% discount against base price.
* Much larger discounts are available based on quantity ordered.
* Ask for a custom quote for more than 5,000,000.
SAC305 Solder Balls (Sn96.5Ag3.0Cu0.5)
SAC305 (Sn96.5Ag3.0Cu0.5) solder balls are the industry-standard lead-free tin-silver-copper alloy for BGA and CSP ball attach, BGA rework, and high-reliability electronics. EasySpheres supplies precision SAC305 solder spheres in diameters from 0.050 mm to 0.889 mm for prototype and production applications, in conformance with IPC J-STD-006, with a Certificate of Conformance on every order.
SAC305 Solder Sphere Specifications
- Alloy: Sn96.5Ag3.0Cu0.5 (SAC305), lead-free
- Applications: BGA and CSP ball attach, BGA rework (lead-free reballing), wafer-level and flip chip bumping, high-reliability electronics
- Melting range: 217 °C solidus, 219 °C liquidus
- Stock diameters: 0.050 mm to 0.889 mm; see the product listing for diameters and part numbers. Also available in tape and reel, 0.300 mm to 0.760 mm.
- 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%.
- Quality: Alloy purity in conformance with IPC J-STD-006; Certificate of Conformance ships with every order; standard quality documentation available on request.
- 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 surface darkening from transit tumbling; QR-coded for lot traceability.
- 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 the best solder alloy for high-reliability BGA packages?
SAC305 is the most widely specified lead-free alloy for high-reliability BGA packages, balancing mechanical strength, thermal-cycling performance, and RoHS compliance. Where the design calls for higher silver content, SAC405 is the alternative.
What is the melting point of SAC305 solder?
SAC305 has a melting range of 217 °C solidus to 219 °C liquidus, typical of near-eutectic tin-silver-copper alloys.
Where can I buy SAC305 solder spheres in small quantities?
From EasySpheres, from 10,000 spheres, in diameters from 0.050 mm to 0.889 mm, with most in-stock orders shipping the same day when placed before 2:00 PM Pacific.
Which solder alloy is best for thermal-cycling reliability?
SAC305 is commonly used where thermal-cycling reliability is required. The final choice still depends on the operating conditions and the assembly specification.
SAC305 vs SAC405 solder balls: which should I use?
Choose SAC305 for most BGA ball attach and rework. SAC405 (Sn95.5Ag4.0Cu0.5) carries 4.0% silver, which can add strength for demanding applications, typically at higher cost. Select based on the design requirement.
Is SAC305 available in tape and reel?
Yes. EasySpheres supplies SAC305 in tape and reel from 0.300 mm to 0.760 mm on EIA-481-compatible 13-inch reels, standard 20,000 spheres per reel.
Why Buy Solder Spheres from EasySpheres
- Fast shipping: most in-stock orders placed before 2:00 PM Pacific ship the same day, otherwise within 24 hours, with a greater-than-95% on-time delivery record.
- Small quantities welcomed: minimum order 10,000 spheres, with volume supply for production requirements.
- Certificate of Conformance with every shipment; technical data sheet and SDS available on the product page.
- Two-year shelf life from the date of shipment; product is held in sealed packaging in a controlled inert storage environment until it ships.
- Full lot traceability with QR-coded packaging.
- Serving approximately 1,500 customers worldwide since 2005 across semiconductor packaging, aerospace, defense, medical electronics, EMS, and BGA rework.
- Internal quality system aligned with ISO 9001:2015 principles (not externally certified); standard quality documentation available on request.
Ordering and Support FAQs
Can I order SAC305 solder spheres in small quantities?
Yes. EasySpheres supplies SAC305 solder spheres with a minimum order of 10,000 spheres and scales to production volumes. Request a quote for larger requirements.
How quickly do SAC305 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 SAC305 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 SAC305 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.
