Soldering Guidelines For The "RJ-B" Relay Series

We use only precision equipment and proven testing methods, specializing in metal to ceramic seals.

The ceramic body assemblies of the "RJ-B" relays are brazed @ 810C in hydrogen atmosphere, therefore it should not be a problem to solder any terminal leads using solder wire appropriate for electrical applications. Both the switch and coil terminals are coated with 60/40 soft solder.

Recommended solder compositions:

TIN/LEAD 50/50, 40/60, 60/40
The tin/lead solder group constitutes the largest portion of solders in use. With the exceptions, the tin/lead solders can be used to solder copper, most copper alloys, lead, high nickel alloys and steel.

The tin/antimonial solder is useful for applications where moderately elevated temperature is a factor. It has a high electrical conductivity and is recommended where lead contamination must be avoided. The tin/antimony solders are not recommended for use on brass.

Nominal Composition Melting Temperature (C) Uses
  Sn/Pb/other Solidus Liquidus
95/5 Sn/Sb 236 243 High melting point Lead-free
95.5/3.8/0.7 Sn/Ag/Cu 217 217 Lead-free
50/50 Sn/Pb 183 212 General purpose
60/40 Sn/Pb 183 188 Electrical
63/37 Sn/Pb 183 183 Wave Soldering
62/36/2 Sn/Pb/Ag 179 179 Silver plated surfaces


The use of acid flux/core is not recommended for this application since its residues could damage the relay surface.

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