Why ALPHA Solder Preforms for Industrial Applications?
From the initial alloying to the final packaging, every step of preform production is managed in house by Alpha offering customers complete process control from creation to completion. With an extensive global manufacturing footprint and dedicated technical support teams, Alpha is uniquely placed to provide the solutions for your industrial assembly builds.
Precise Fit: ALPHA Solder Preforms can fit over or be inserted into difficult to solder processes like connector pins and cable termination interconnects.
Solder Volume and Flux Level Consistency: Resulting from Alpha’s tightly controlled processing tolerances, ALPHA Solder Preforms provide a precise solder volume and minimal amount of flux that ensures a highly repeatable soldering result. This consistency benefits critical components assemblies.
Extensive Alloy Range: Alpha offers Solder Preforms in a wide selection of alloys ranging in melting temperatures from as low as 47°C (117°F) to well over 300°C (572°F). The combination of precise solder volume and specific alloys allows for manageable assembly temperatures, enabling a fuse function or a long plastic range; where the solder preform can be pre-assembled to the component for final soldering at a later time.
ALPHA Solder Preforms Product Offering
ALPHA Solder Preforms come in a very wide range of alloys, sizes and shapes and can be fluxed if required.
Process implementation
ALPHA Solder Preforms are delivered in bulk or tape & reel packaging. Bulk Preforms can be processed manually, with a jig, fixture or automated feeder systems. ALPHA Solder Preforms are fully compatible with all standard soldering processes such as induction, laser, light beam, soldering iron, hot plates, torch and heat guns.
ALPHA Preform Alloy and Flux Selector
Leaded Alloy |
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Leaded Exactalloy® |
Melting temperature range |
Industry |
Remarks |
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Alloy name |
Solidus in °C |
Liquidus in °C |
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Sn62 Pb36 Ag2 |
179 |
354 |
General Industrial |
Silver containing eutectic alloy |
Sn63 Pb37 |
183 |
361 |
General purpose |
Most popular leaded eutectic alloy |
Sn60 Pb40 |
183-188 |
361-370 |
General purpose |
Off-eutectic, silver-free alloy |
In50 Pb50 |
184-209 |
363-408 |
Communication |
High ductility alloy |
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Low temperature leaded Exactalloy® |
Melting temperature range |
Industry |
Remarks |
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Alloy name |
°C |
°F |
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Sn16 Pb32 Bi52 |
95-96 |
203-205 |
Safety devices |
Ultra-low temperature, cadmium-free |
Sn25 Pb25 Bi50 |
95-115 |
203-239 |
Safety devices |
Low temperature, cadmium-free |
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High temperature leaded Exactalloy® |
Melting temperature range |
Industry |
Remarks |
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Alloy name |
°C |
°F |
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Sn27 Pb70 Ag3 |
179-253 |
354-487 |
Automotive defroster |
High leaded alloy with long pasty range |
Sn10 Pb88 Ag2 |
268-290 |
514-554 |
Electrical components |
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Sn5 Pb92.5 Ag2.5 |
280 |
536 |
Electrical components |
Most popular high leaded, high temperature alloys |
Sn2 Pb95.5 Ag2.5 |
299-304 |
570-579 |
Electrical components |
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In5 Pb92.5 Ag2.5 |
300 |
572 |
Electrical components |
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Sn5 Pb95 |
310-314 |
590-597 |
Electrical components |
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ALPHA Preform Alloy and Flux Selector
Lead-Free Alloy |
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RoHS compliant Exactalloy® |
Melting temperature range |
Industry |
Remarks |
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Alloy name |
°C |
°F |
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SAC305* |
217-221 |
422-430 |
General purpose |
Most popular RoHS compliant alloy |
SACX |
217-228 |
422-442 |
General purpose |
Low-silver (Ag0.3) SAC alloy |
Sn96.5 Ag3.5 |
221 |
430 |
General purpose |
Eutectic, copper-free |
SN96 Ag4 |
221-238 |
430-460 |
General purpose |
Off-eutectic, copper-free |
Sn99 Sb1 |
235 |
455 |
General purpose |
Eutectic, Sb containing alloy |
Sn95 Sb5 |
232-240 |
450-464 |
General purpose |
Off-eutectic, Sb containing alloy |
Low temperature RoHS compliant Exactalloy® |
Melting temperature range |
Industry |
Remarks |
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Alloy name |
°C |
°F |
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Sn42 Bi58 |
138 |
280 |
General purpose |
Eutectic, RoHS compliant alloy |
Sn42 Bi57.6 Ag0.4 |
138-139 |
280-282 |
General purpose |
Silver added for ductility |
Sn60 Bi39.6 Ag0.4 |
138-170 |
280-338 |
General purpose |
Off-eutectic, low temperature RoHS alloy |
Sn52 In48 |
118-131 |
244-268 |
Special |
Ultra-low temperature, off-eutectic alloy |
Sn48 In52 |
118 |
244 |
Special |
Ultra-low temperature, eutectic alloy |
High reliability RoHS compliant Exactalloy® |
Melting temperature range |
Industry |
Remarks |
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Alloy name |
°C |
°F |
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INNOLOT |
206-218 |
403-424 |
Automotive, underhood |
High reliability alloy |
Powerbond® 2050 |
235-240 |
455-464 |
Power semiconductor |
Thermal fatigue resistance alloy |
Powerbond® 2110 |
222-266 |
432-511 |
Power semiconductor |
Thermal fatigue resistant, high thermal conductive alloy |
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* Various other SAC alloy variants can be made available, including SAC105, SAC387 and SAC405 **Above listed alloys are the most commonly used types in our industries. Please consult us about the availability of other alloys. | ||||
Flux |
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ALPHA® external flux coating for Preforms | ||||
Flux type |
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Remarks |
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RMA, ROL0 |
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No-clean, halide-free, mildly activated flux (Finishes: Ni/Au, Ag, Cu,etc.) |
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RMA, ROL1 |
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No-clean, mildly activated flux (Finishes: Ni/Au, Ag, Cu,etc.) |
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RA, ROM1 |
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No-clean flux with higher activation (Finishes: Brass, Ni, Cu, Sn, etc.) |
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RSA, ROH1 |
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No-clean flux with highest activation for challenging soldering surfaces |
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ALPHA® internal flux core for Preforms |
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Flux type |
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Remarks |
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RMA. ROL0 |
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Halogen-free, mildly activated flux (Finishes: Ni/Au, Ag, Cu,etc.) |
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RA, ROM0 |
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Halide-free flux with higher activation (Finishes: Brass, Ni, Cu, Sn, etc.) |
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RSA, ROM1 |
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Highest flux activation for challenging soldering surfaces |
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*Above listed fluxes are the most commonly used types in our industries. Please consult us about the availability of other flux types. | ||||
KESTER® Tacky Fluxes for Preforms |
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Flux type |
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Remarks |
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Kester TSF Flux |
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Tacky flux that can be used to keep preforms in place before soldering |
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ALPHA offers a wide selection of fusible alloys in a range of alloys and melting temperatures.