PRODUCT INSTRUCTIONS
DOC-IFU-BI58-30G-001-EN · Rev. A · 2026
Sn42/Bi58 Solder Paste
Sn42 / Bi58 · Low-Temp Lead-Free · 30g Syringe
Low-Temp Lead-Free
No-Clean
Type 4
RoHS
IPC J-STD-005
30g
ALLOY
Sn42/Bi58
MELTING POINT
138°C
POWDER TYPE
Type 4
NET WEIGHT
30g
1
APPLICATIONS
Hand Dispensing / Rework
Heat-Sensitive Components
Flex PCB (FPC)
Consumer Electronics
Low-Temp PCB Process
BGA / SMD Placement
2
SPECIFICATIONS
Alloy CompositionSn42 / Bi58
Liquidus Temperature138°C
Solidus Temperature138°C
Powder TypeType 4 (20–38 μm)
Flux TypeNo-Clean
Flux ClassificationROL0 (IPC J-STD-004)
Metal Content~88.5% by weight
RoHS CompliantYes
StandardsIPC J-STD-005 / J-STD-006
3
REFLOW PROFILE
Recommended Reflow Profile for Sn42/Bi58
Liquidus 138°CPeak 160°C2590120138°CPreheatSoakReflowCooling→ Time
Preheat
25-90°C
1-2°C/s
Soak
90-120°C
60-90s
Reflow
150-170°C
Peak: 160°C
Cooling
<2°C/s
Natural
Time above liquidus (138°C): 20–45 seconds recommended. Peak must not exceed 170°C. Bi-based joints are brittle — no vibration during cooling.
4
STORAGE
STORAGE TEMP
2-10°C
Refrigerate after opening
SHELF LIFE
6 Months
From manufacture date
HUMIDITY
35-70%
Keep sealed and dry
After Use: Remove the needle, tighten the cap, and store upright in the refrigerator. Mark the open date — best used within 2 weeks of opening. Do not use past the EXP date.
5
TROUBLESHOOTING
Paste hard to dispense
Paste too cold. Let the syringe warm at room temperature (20–25°C) for 1–2 hours. Do not apply heat.
Joints appear dull or grainy
Peak temperature too low, or cooling too fast. Raise the peak slightly and allow natural cooling.
Brittle or cracked joints
Characteristic of Bi-based alloys. Avoid mechanical shock; not suitable for high-stress applications.
Paste dried at the nozzle
Clear with a toothpick or replace the needle. Cap the syringe immediately after every use.
6
HOW TO USE
1
Warm the syringe
Remove from the refrigerator and let it sit at room temperature (20–25°C) for 1–2 hours. Never microwave or apply direct heat.
Cold paste affects flow and joint quality
2
Prepare your workspace
Work in a well-ventilated area. Wear nitrile gloves and safety glasses. Clean PCB pads with 99% IPA and let dry completely.
3
Attach the dispensing needle
Screw the needle onto the syringe tip. Use 22G–25G for fine-pitch (<0.5mm); 18G–20G for standard pads.
4
Apply paste to pads
Apply even pressure in small amounts — just enough to cover the pad. Avoid bridging adjacent pads.
Less is more — start small
5
Place the components
Use tweezers or a vacuum pen to place components. Paste tackiness holds them in place before reflow.
6
Low-temperature reflow
Follow the low-temp profile; peak must not exceed 170°C. Do not move or vibrate the board until fully solidified.
No vibration — Bi joints crack while solidifying
7
Inspect joint quality
Good joints look bright with complete wetting. No-clean flux residue is non-conductive and non-corrosive — no cleaning required.
7
SAFETY INFORMATION
Warning
WARNING
GHS07GHS09
Hazard statements — H317 May cause an allergic skin reaction (rosin / colophony). H410 Very toxic to aquatic life with long lasting effects.
Precautionary statements — P261 Avoid breathing dust or fumes. P264 Wash hands and exposed skin thoroughly after handling. P273 Avoid release to the environment. P280 Wear protective gloves, eye protection and protective clothing. P302+P352 IF ON SKIN: Wash with plenty of soap and water. P333+P313 If skin irritation or rash occurs: Get medical advice or attention. P362+P364 Take off contaminated clothing and wash it before reuse. P391 Collect spillage. P501 Dispose of contents and container in accordance with local, regional and national regulations.
KEEP OUT OF REACH OF CHILDREN.
DO NOT
✗ Mix with leaded solder or leaded HASL pads — Bi and Pb form a 96 °C low-melting eutectic that causes joint failure.
✗ Discard with household waste — follow local hazardous-waste rules.
✗ Eat, drink or smoke during use.
FIRST AID — Skin: wash with soap and water. Eyes: rinse with water for 15 minutes. Inhaled: move to fresh air. Swallowed: rinse mouth, do NOT induce vomiting. If symptoms persist, get medical advice. Poison Control 1-800-222-1222 (USA).
STORAGE — Refrigerate 2–10 °C (36–50 °F). Do not freeze. Bring the sealed syringe to room temperature for 1–2 h before opening. Shelf life 6 months unopened; use within 3 weeks after opening.
For professional and hobbyist electronics assembly and repair. Not for human consumption or food-contact use. Transport classification: see SDS Section 14.
Warning
CALIFORNIA PROPOSITION 65 WARNING · ADVERTENCIAWARNING: This product can expose you to lead and cadmium, which are known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands thoroughly after use. www.P65Warnings.ca.gov
ADVERTENCIA: Este producto puede exponerlo a plomo y cadmio, que son reconocidos por el Estado de California como causantes de cáncer y defectos de nacimiento u otros daños reproductivos. Lávese bien las manos después de usar. www.P65Warnings.ca.gov
DISTRIBUTED BY
LINGSKO LLC
CASPER WY 82609 USA
Full Safety Data Sheet
tinvoa.co/sds/bi58
SKU TSP-BI58-30G · DOC-IFU-BI58-30G-001-EN · Rev. A · 2026 · TDS: tinvoa.co/tds/bi58
www.tinvoa.co
[email protected]