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Sn99,3Cu0,7 PRO

Lead-free solder alloy with flux, for universal use in electronics and electrotechnics.

  • Без свинца
  • Малая активность
  • На основе канифоли
  • Без галогенов

Alloy designation in accordance with ISO 9453:2014:
Sn99,3Cu0,7 (401)
Product type: Cored solder wire
Flux: PRO

1. General characteristics

The solder was produced in the first smelt of tin and copper. The composition of the solder complies with the ISO 9453:2014 standard. The flux PRO has good spread and its J-STD classification is ROM0. It is lead-free solder wire for manual and automatic processes used in industrial applications in electronics and electrical engineering, where meeting the requirements of the RoHS2 Directive is required.

2. Chemical compositions, mass fraction in %

Sn Cu Bi Sb Ag Cd Au In Pb Al As Fe Ni Zn
rest 0,05 - 0,90 max 0,10 max 0,10 max 0,10 max 0,002 max 0,05 max 0,10 max 0,07 max 0,001 max 0,03 max 0,02 max 0,01 max 0,001

3. Physical characteristics

Melting point: (solidus / liquidus)227°C
Density7,31 g/cm3
Electrical conductivity0,126 μΩ•m
Thermal conductivity66 W/m•K
Tensile strength300 kgf/cm2
Elongation at break21 %
Hardness9 HB
Suggested operating temperatures340 - 420°C (recommended soldering temperature above 380 °C)

4. PRO flux

acc. to DIN 8511SW32
acc. to ISO 94541.1.3B
acc. to J-STD-004ROM0
Flux content3,0 +/- 0,2% other on request
Halide content0,0 %
Acid Value305 ±10 mg KOH/g
SIR test (PN-EN ISO 9455-17)pass (above 100 MΩ)

5. Other information

Available diameters

0,25 • 0,38 • 0,50 • 0,56 • 0,70 • 0,80 • 0,90 • 1,00 • 1,20 • 1,50 • 1,60 • 2,00 • 2,50 • 3,00 • 4,00 mm

other on request


50 g – cartons 120 pcs.
100 g – cartons 30 pcs./3kg
250 g – cartons 5 kg
500 g – cartons 5 kg
1 kg – cartons 10 kg

other on request

Expiration date 3 years from the end of the year of production.
for example: batch 61112233 = date of production 2016, date of expiry 2019
Label Reels and cartons marked with alloy type, flux type, diameter, net weight and batch number.
Storage Store at room temperature, in a dry place and beyond the reach of children.

Files to download:

Sn99,3Cu0,7 PRO - karta techniczna

Sn99,3Cu0,7 PRO - karta charakterystyki

Physical, mechanical and chemical properties available in the TDS (download above).

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