Kester 405 Data Sheet

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405

405

No-Clean, Rosin-Free Cored W

No-Clean, Rosin-Free Cored W

ire

ire

For Lead-bearing and Lead-free alloys

For Lead-bearing and Lead-free alloys

Product Description

Kester 405 Rosin-Free Low Residue Flux for
cored solder wire was developed to completely
eliminate R-42 sensitizers commonly found in
rosin-based fluxes. Kester 405 has performance
characteristics far exceeding st andard No-Clean
fluxes without any of the sensitizer issues.

Performance Characteristics:

• Nearly colorless translucent residues

• Improves wetting performance

• Excellent solderability and fast wetting to a
variety of surface finishes

• Eliminates the need and expense of cleaning

• Low smoke and odor

• Compatible with leaded and lead-free alloys

• Classified as REL0 per J-STD-004

• Compliant to Bellcore GR-78

RoHS Compliance

This product meets the requirements of the RoHS
(Restriction of Hazardous Subst ances) Directive,
2002/95/EC Article 4 for the st ated banned
substances. (Applies only if this core flux is
combined with a lead free alloy)

Reliability Properties

Copper Mirror Corrosion: Low

Tested to J-STD-004, IPC-TM-650, Method 2.3.32

Corrosion Test: Low

Tested to J-STD-004, IPC-TM-650, Method 2.6.15

Silver Chromate: Pass

Tested to J-STD-004, IPC-TM-650, Method 2.3.33

Chloride and Bromides: None Detected

Tested to J-STD-004, IPC-TM-650, Method 2.3.35

Fluorides by Spot Test: Pass

Tested to J-STD-004, IPC-TM-650, Method 2.3.35.1

SIR, IPC (typical): Pass

Tested to J-STD-004, IPC-TM-650, Method 2.6.3.3

Spread Test (typical):

Tested to J-STD-004, IPC-TM-650, Method 2.4.46

Area of Spread mm2(in2)

Flux Core Solder

Cu Ni

285 Mildly Activated Rosin 335 (0.52) 142 (0.22)
245 No-Clean 348 (0.54) 116 (0.18)
405 No-Clean 355 (0.55) 174 (0.27)

Test Parameters

1.0 gram of cored wire solder
63/37 solder alloy

1.0% flux per weight of solder wire

Blank 405

Day 1

1.6 ×1010Ω 7.2 × 109Ω

Day 4

1.2 ×1010Ω 7.5 × 10

9

Ω

Day 7

1.1 ×1010Ω 7.0 × 109Ω

Application Notes

Availability:

Kester 405 is available in a wide variety of alloys, wire diameters and flux percentages. For most applications,
Sn63Pb37or Sn96.5Ag3.0Cu0.5 is used. Consult the alloy temperature chart in Kester’s product catalog for
a comprehensive alloy list. The st andard wire diameter for most applications is 1.00mm (0.031in). Wire
diameters range from 0.25 - 6.00mm (0.010 to 0.250in). A "Standard Wire Diameters" chart also is also
included in Kester’s product cat alog. The amount of flux in the wire dict ates the ease of soldering for an
application. For tin/lead applications, core 50 or 58 (1.1 and 2.2% flux by weight) are recommended. For
Lead-free and high-lead applications, core 58 or 66 (2.2 and 3.3% flux by weight) are recommended. Kester
405 is packaged on spools of different sizes to accommodate a variety of applications.

Process Considerations:

Solder iron tip temperatures are most commonly between 315-371°C (600-700°F) for Sn63Pb37 and
Sn62Pb36Ag02 alloys and 371-427° C (700-800° F) for lead-free alloys. Heat both the land area and
component lead to be soldered with the iron prior to adding Kester 405 cored wire. Apply the solder wire to
the land area or component lead. Do not apply the wire directly to the soldering iron tip. If needed, Kester
951 no clean, liquid flux may be used as a compatible flux to aid in reworking soldered joints. Kester 951 is
also available in Flux-Pens

Cleaning:

The 405 residues are non-conductive, non-corrosive and do not require removal in most applications. The
flux residues are comparable to a conventional RMA except that the 405 residue is clear and colorless.

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for optimum board cleanliness.

Storage, Handling, and Shelf Life:

Storage must be in a dry , non-corrosive environment. The surface may lose it s shine and appear a dull
shade of grey. This is a surface phenomena and is not detrimental to product functionality. Flux cored solder
wire has a limited shelf life determined by the alloy used in the wire. For alloys cont aining > 70% lead, the
shelf life is two years from date of manufacture. Other alloys have a shelf life of three years from date of
manufacture.

Health & Safety:

This product, during handling or use, may be hazardous to health or the evironment. Read the Material
Safety Data Sheet and warning label before using this product.