Middle Stroke Tactile Switch

B3SL

253

Electrical Operation

Use the Switch within the rated voltage and current ranges, other-

wise the Switch may have a shortened life expectancy, radiate heat,

or burn out. This particularly applies to the instantaneous voltages

and currents when switching.

Soldering

Soldering Precautions

1. Before any kind of soldering, test to confirm that soldering can

be performed properly. Otherwise the Switch may be

deformed by the soldering heat depending on the type of

PCB, pattern, or lands of the PCB.

2. Do not solder the Switch more than twice, including rectifica-

tion soldering. Wait for at least five minutes between the first

and second soldering to allow the temperature to return to

normal. Continuous soldering may cause the casing to melt or

deteriorate the Switch characteristics.

Reflow Soldering Conditions

Firmly attach a thermocouple to the surface of the terminals with sol-

der that has a high melting point and set the reflow oven so that the

peak temperature of the terminals is 260

°C or less.

The following figure shows the temperature profile.

Manual Soldering

1. Soldering temperature: 350

°C max. at the tip of the soldering

iron

2. Soldering time: 3 s max. for a 1.6-mm thick, single-side PCB

Washing

Standard Switches are not sealed, and cannot be washed.

Doing so will cause the washing agent, together with flux or dust

particles on the PCB, to enter the Switch, resulting in malfunction.

Applicable Printed Circuit Board

The Switch is designed for a 1.6-mm thick, single-side PCB.

Using PCBs with a different thickness or using double-sided,

through-hole PCBs may result in loose mounting, improper insertion,

or poor heat resistance in soldering. These effects will occur,

depending on the type of holes and patterns of the PCB. Therefore, it

is recommended that a verification test is conducted before use.

RoHS Compliant

The "RoHS Compliant" designation indicates that the listed models

do not contain the six hazardous substances covered by the RoHS

Directive.

Reference:

The following standards are used to determine compliance for the six

substances.

Lead:

1,000 ppm max.

Mercury:

1,000 ppm max.

Cadmium:

100 ppm max.

Hexavalent chromium:

1,000 ppm max.

PBB:

1,000 ppm max.

PBDE:

1,000 ppm max.

Packaging Specifications

The packaging specifications for B3SL Switches in embossed taping

are given below.

B3SL-1002P

B3SL-1022P

Common Precautions

Be sure to read the precautions common to all Tactile Switches, con-

tained in the Technical User’s Guide, “Tactile Switches, Technical

Information” for correct use.

Temperature

(

°C)

180

220

260 max.

150

Preheating time

Main

heating

time

Time (s)

60 to 120

60 max.

Standards

Conforms to JIS.

Package

2,000 Switches (B3SL-1002P)

1,400 Switches (B3SL-1022P)

Heat resistance

60

°C for 24 hours (without deformation)

2

16

7.5

1.75

1.5

+0.1

0

dia.

Tape drawing direction

(3.7)

dia.

13 dia.

Reel (Material: PS)

Label

(22)

Tape drawing

direction

(5.3)

2

16

7.5

1.75

1.5

+0.1

0

dia.

Tape drawing direction

dia.

13 dia.

Reel (Material: PS)

Label

(22)

Tape drawing

direction