Basic Info.
Performance
High Temperature
Application
SMT PCB LED Lf318
Transport Package
0.5kg/Jar
Specification
Sn98.5/Ag1.0/Cu0.5
Origin
China/Malaysia/India
Product Description
product descriptionEMCO # 255-307 disposable solder paste is a lead-free solder paste based on rosin, which has a wide printing operation range and Long downtime and printable period. Its soft, non-adhesive residue improves the reliability of online testing and reduces the frequency of cleaning probes.
feature:1. Probe-testable residue
2.According to IPC J-STD-004 standard ROL1
3. Provides enhanced activity for the robustness of PCB boards and components
4. Outstanding slump resistance
5. Outstanding adhesion performance and printable time
6. Extended "printing period" interval
7. Bright, colorless residue
Chemical composition of the alloyEMCO # 255-307P lead-free solder paste alloy composition is strictly controlled in the following LF-307 specifications:-
AppearanceAltolai's solder paste appears as a gray uniform solder paste.
Tin powder particlesThe size of the solder particles is based on the international standard IPC J-STD-005.
weight in the sample% | Nominal size 3 | Nominal size 4 |
Less than 1% of sample size | Greater than 45 microns | 38 microns |
At least 80% of samples size | 45-25 microns | 38-20 microns |
Up to 10% of samples size | Less than 20 microns | 20 microns |
EMCO # 255-307P Lead-free solder paste reflow temperature cur
Warm upHeat from room temperature to 140-150 ° C at a rate of 1-2 ° C per second. Faster speeds can cause component rupture due to evaporation of adsorbed moisture.Soaking zoneBetween 150 and 200 degrees Celsius. The soaking zone is used to level the temperature difference on the PCB. It is often used in PCBs with large differences in infrared furnaces and components and copper distribution.Speed up to refluxMaximum 2 degrees Celsius per second due to different thermal expansion rates inside the element.ReflowPeak temperature is related to component specifications. The peak temperature is between 240-245
degrees Celsius in 5-8 seconds, and is higher than 220 degrees Celsius in 40-80
seconds.cool downMaximum 3 degrees Celsius per second due to different thermal expansion rates inside the element.CleanMisprints can be wiped with commercially available solvent cleaners
After cleaning, EMCO#255-307P
residue can be left on the circuit board for reflow. If cleaning is required, a commercially available solvent cleaner can be used.
Stencil cleaning It is recommended to wipe with a commercially available screen cleaner wax paper.packageEach can of solder paste weighs about 500 grams and should be tightly sealed. The label should be accompanied by the product number, alloy composition, particle size, net weight and product batch
Related information. Solder tin cans should be placed in foam boxes and packed in cardboard boxes, each box weighing approximately 10 kg. Cartridge-type solder pastes of 600 or 1000 grams are available.Storage and shelf lifePlease store below 2-10 degrees Celsius. The validity period of the solder paste is within six months from the production date. Before using the solder paste, it needs to warm up for about 4 hours before use. Before putting the solder paste on the template, use a spoon to stir the solder paste for 1-2 minutes or the solder paste mixer for 30-60 seconds.ShipA certificate of analysis is attached to the shipment.Material Safety Data SheetProduct MSDS / SDS can be obtained from sales department.
Lead-free low-temperature alloys:Alloy number
| Alloy composition | Fuse | Feature | Application |
LF-302 | Sn42 / Bi58 | 138°C | Reasonable shear strength and fatigue resistance. | Can be used for temperature-sensitive parts and LED welding operations.Can be used for multi-step welding and fuse-like fuses operations can also be used for nozzle and exhaust valve operations. |
|
LF-329 | Sn42 / Bi57/Ag1 | 139°C | The addition of silver enhances its mechanical properties, with excellent resistance to thermal fatigue. |
|
LF-323 | Sn64 / Bi35/Ag1 | 170-190°C | The addition of silver enhances its mechanical properties, with excellentresistance to thermal fatigue. |
|
Lead-free medium temperature alloy:Alloy number | Alloy composition | Fuse | Feature | Application |
LF-307 | Sn96.5 / Ag3.0 / Cu0.5 | 217-219°C | Excellent mechanical properties and thermalfatigue performance. | Standard SAC alloy for most SMT applications. |
|
LF-315 | Sn99 / Ag0.3 / Cu0.7 | 216-228°C | Excellent mechanical properties and thermal fatigue performance. | Low cost SAC alloy for most SMT applications. |
|
SN100C | Sn99.3/Cu0.6/Ni+Ge | 227°C | Excellent mechanical properties, bright and smooth solder joints.Excellent through-holesoldering performance. | SnCu alloy instead of SAC alloy for most SMT applications. |
Paste fluxAlloy number | Feature | Flux classification |
EM#502 (HF) | Halogen-free flux, with high shear strength and excellent printing ability.Can also be used for high-speed printing operations.Its flux can withstand high preheat temperatures, which show excellent wetting on most circuit boards, leaving only clean residue. | ROL0 |
EM#503PT (HF) | Halogen-free flux, with high shear strength and excellent printing ability.Has excellent anti-collapse performance and excellent adhesion performance.Its flux can withstand high preheat temperatures, which show excellent wetting on most circuit boards, leaving only clean residue. | ROL0 |
EM#615 | Specially configured flux with excellent printability for ultra-fine pitch welding operation.Its flux can withstand high preheat temperatures and a wide range of operational reflow jobs.It shows excellent wetting on most circuit boards. | ROL1 |
EM#233 | Specially configured flux enhances activity on difficult-to-solder circuit boards and parts.Has excellent anti-collapse performance and excellent adhesion performance.It shows excellent wetting on most circuit boards and leaves only clean residue. | ROL1 |
EM#255 | Specially configured flux enhances activity on difficult-to-solder circuit boards and parts.It shows excellent wetting on most circuit boards.Has excellent anti-collapse performance and excellent adhesion performance.The residue is soft, non-sticky; can be operated on probe test.Residues are clean, printing takes longer and productivity increases. | ROL1 |
EM#265 (HF) | Halogen-free formulations, temperature range can be widely used, printing operation for a long time.Soft, non-stick residue enhances reliability during in-circuit testing and reduces test probe cleaning frequency.Has excellent anti-collapse performance and excellent adhesion performance. | ROL0 |
Address:
Long Hua town, Long Teng industrial zone of Bo Luo county, Hui Zhou city, Guangdong, China 516122
Business Type:
Trading Company
Business Range:
Manufacturing & Processing Machinery
Company Introduction:
Electroloy Group
Electroloy Group was established in Singapore on May 11, 1977, with the beginning of its first manufacturing plant, Electroloy Metal Pte Ltd. Electroloy grew rapidly as it receive recognition and acceptance as one of the leading manufacturers in the soldering industry; Additional manufacturing plants was set up in Malaysia, Suzhou China, Huizhou China and Noida India as part of the expansion plans.
In order to provide a comprehensive soldering solution mission, Electroloy embarked on product development and rigorous manufacturing operations, providing high-quality solder products to meet the changing needs and high-level needs of our customers. Coupled with the geographical traditions and diversified office staffing we have, Electroloy is confident that we will continue to provide our customers High-quality, innovative soldering solutions
In 2006, we worked with the Agency for Science, Technology and Research to establish a complete high-level comprehensive laboratory. Our R & D labs focus not only on chemical and metal alloy research, but also integrated testing services such as soldering sectioning, X-ray imaging, tensile testing and fatigue testing.
Electroloy prides itself as a "Total Soldering Solutions" company. We provide not just products and also aim to forge partnerships with our customers as we grow together with them. It is our goal to be the preferred solder supplier for the Electronics Industry