SAC 405 Alloy: Maximum Reliability for Automotive
High-performance soldering for critical applications and high reliability
SAC 405 alloy (Sn95.5/Ag4/Cu0.5) represents the premium solution for automotive applications and high-reliability sectors. With 4% silver, it guarantees superior mechanical strength, excellent thermal cycling resistance and exceptional durability in extreme conditions.
Why Choose SAC 405
Technical advantages of the highest silver content alloy
SAC 405 Technical Specifications
Characteristics of Sn95.5/Ag4/Cu0.5 alloy
| Property | Value | Unit | Notes |
|---|---|---|---|
| Composition | Sn95.5/Ag4/Cu0.5 | % | 4% silver for maximum reliability |
| Melting Point | 217-221 | °C | Solidus-liquidus range |
| Tensile Strength | 45-50 | MPa | Superior to SAC 305 |
| Elongation | 35-40 | % | Excellent ductility |
| Creep Resistance | Excellent | - | 20% better than SAC 305 |
SAC 405 Applications
Sectors requiring maximum reliability
Critical Automotive
Engine ECUs, ABS, airbags, ADAS. Components subjected to vibrations, thermal shocks and extreme cycles (-40°C/+150°C).
Aerospace & Defense
Avionics, critical systems, onboard electronics. Aerospace certifications and resistance to extreme conditions.
Critical Medical
Implantable devices, critical diagnostic instrumentation. Reliability for life-critical applications.
Severe Industrial
High temperature environments, vibrations, thermal cycles. Oil&gas, railway, power generation.
SAC 405 vs SAC 305: Technical Comparison
When to choose SAC 405 instead of SAC 305
| Characteristic | SAC 405 (4% Ag) | SAC 305 (3% Ag) | SAC 405 Advantage |
|---|---|---|---|
| Mechanical Strength | 45-50 MPa | 38-42 MPa | +15-20% stronger |
| Creep Resistance | Excellent | Good | +20% better long-term |
| Thermal Cycles | Superior | Good | +30% more cycles before failure |
| Cost | High | Medium | Justified for critical applications |
| Ideal Applications | Automotive, Aerospace | General electronics | For maximum reliability |
Recommendation: SAC 405 for critical automotive (ECU, airbag, ADAS), aerospace, implantable medical. SAC 305 for consumer and standard industrial electronics. The additional cost of 15-25% is justified for critical applications.
Frequently Asked Questions about SAC 405
Everything you need to know about the high-reliability alloy
Request Consultation for SAC 405
Our experts help you evaluate if SAC 405 is the right choice for your critical application
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