High Reliability Solder Paste for Automotive Electronics

TENSAN TS-506 – High-Reliability Solder Paste for Automotive Electronics – Full Technical Data & Supplier Insights

For automotive PCB assemblies, solder joint integrity under thermal cycling, vibration, and humidity is non‑negotiable. TENSAN, a Vietnam‑based manufacturer, offers the TS-506 solder paste for automotive electronics – a proven alloy‑flux system that meets the stringent demands of engine control units, LED lighting, and sensor modules. This page delivers all technical specifications, process guidelines, and practical answers to help you evaluate whether TENSAN is the right supplier for your production line.

Why This Solder Paste for Automotive Electronics?

Automotive applications require solder pastes that survive extreme environments while maintaining stable electrical performance. The TS-506 combines a Sn98.5Ag1.0Cu0.5 alloy with a specially formulated flux that delivers:

• Wide reflow window – tolerant to oven variations, critical for mixed‑component boards.
• Superior wetting – ensures consistent fillets on OSP, ENIG, and bare copper.
• Low voiding – reduces thermal stress points under large ground pads and BGAs.
• Long stencil life – maintains print definition over 8+ hours, minimising downtime.
• Clear, non‑corrosive residues – safe for probe testing and conformal coating.

These features make it an ideal solder paste for automotive electronics, where every joint must pass strict visual and X‑ray inspection.

Complete Technical Specifications

Flux Performance Data

The flux system is engineered to resist electrochemical migration – a key concern for automotive electronics.

Application Guidelines for Consistent Quality

To achieve the best results with TS-506, follow these proven procedures – especially critical for automotive‑grade assemblies.

 Storage and Thawing

Storage: Keep sealed at 2°C – 10°C. Never freeze.Thawing: Return to room temperature for at least 4 hours before opening. This prevents moisture condensation, which can cause spattering.

 Printing Parameters

• Squeegee: 60° angle, stainless steel recommended.
• Pressure: ~200 g/cm² – adjust until the stencil is cleanly wiped.
• Speed: Depends on board complexity and stencil thickness.

Packaging, Labeling, and Shelf Life

• Standard packaging: 500 g jars; also available in 100 g syringes.
• Label information: Alloy, model (TS-506), batch number, net weight, expiry date.
• Shelf life: 6 months from manufacture date when stored at 2°C – 10°C.Each batch is fully traceable – a mandatory requirement for automotive supply chains.

Safety and Handling (MSDS Summary)

• Health: Flux fumes may irritate eyes and respiratory tract – use fume extraction.
• Skin contact: Wash immediately with soap and water.
• Storage: Keep away from strong oxidisers and acids.
• Disposal: Follow local regulations; recycle where possible.

FAQ – Solder Paste for Automotive Electronics

Q1: Why choose TS-506 as your solder paste for automotive electronics instead of a higher‑silver alloy like SAC305?

A: While SAC305 offers slightly higher thermal fatigue resistance, SAC105 (Sn98.5Ag1.0Cu0.5) provides a better balance for many automotive applications. The lower silver content reduces intermetallic compound growth, which can improve ductility and drop‑shock performance – valuable for under‑hood modules. Moreover, TS‑506’s flux is optimised to suppress voiding under BGAs, a common failure site in automotive ECUs. Combined with its excellent SIR values even at 85°C/85%RH, it meets the reliability standards of AEC‑Q100‑compliant assemblies. Cost‑effectiveness is an added bonus without compromising process yield.

Q2: How does TENSAN ensure batch‑to‑batch consistency for this solder paste for automotive electronics?

A: TENSAN performs 100% incoming inspection on raw materials and conducts in‑process checks during mixing and milling. Every batch of TS‑506 undergoes a full suite of tests per JIS.Z.3284 and IPC‑TM‑650: viscosity, powder particle distribution, flux content, copper mirror corrosion, and surface insulation resistance. A Certificate of Analysis (CoA) accompanies each shipment, listing all measured values and test conditions. This rigorous quality system allows you to trace every jar back to its production date and raw material lots – a critical feature for automotive quality management (IATF 16949 compliant).

Q3: Can this solder paste for automotive electronics be used in a lead‑free, mixed‑metal assembly with components having SnPb finishes?

A: The TS‑506 is a fully lead‑free paste, but it can wet SnPb component leads with adequate reflow temperatures. However, for automotive applications, we strongly recommend using lead‑free components exclusively to avoid brittle intermetallic formation and to maintain the alloy’s rated melting point and reliability. If you must mix, increase the peak temperature to 245°C – 250°C and extend the time above 221°C to 70‑90 seconds to ensure complete coalescence. Always run a test board with micro‑sectioning to verify the joint microstructure before production.

Why TENSAN as Your Manufacturing Partner?

TENSAN operates a state‑of‑the‑art plant in Bac Ninh, Vietnam, offering short lead times and competitive pricing for Southeast Asian and global customers. As a direct manufacturer, we control alloying, flux formulation, and filling – guaranteeing stability across every shipment. Our technical team provides on‑site support for profile optimisation and defect troubleshooting, helping you ramp up production with confidence.

Contact Details:

Address: TS10 Road, Tien Son Industrial Park, Bac Ninh, Vietnam

Phone: +84‑222‑650‑8818

Email: mark@sztensan.com