*RoHS Directive 2002/95/EC Jan 27 2003 including Annex.

Specifications are subject to change without notice.

Customers should verify actual device performance in their specific applications.

STJN-4 SMD Super-Thin Tact Switch

Features

■

Super-thin 4.5 mm square SMD

■

Two different operating forces

■

0.55 mm height without knob

■

Compatible with surface mount reflow

soldering processes

■

RoHS compliant*

Electrical Characteristics

Max. Power Rating 12 VDC max., 20 mA

Contact Resistance

...............................100 milliohms max.

Insulation Resistance

................50 megohms min., 100 VDC

Dielectric Strength

...........................AC 100 V for 1 minute

Bounce

On .........................................3 ms max.

Off .......................................10 ms max.

Circuit ....................................N.O. SPST

Mechanical Characteristics

Mechanical Life .........50,000 cycles min.

Actuation Force

..................160 gf ±50 gf (1.6 N ±0.5 N)

.................240 gf ±60 gf (2.4 N ± 0.6 N)

Stroke ..........................0.2 mm ±0.1 mm

General Characteristics

Switch Type .........................(N.O.) SPST

Operating Temperature Range

....................................-20 °C to +70 °C

Storage Temperature Range

....................................-40 °C to +85 °C

Product Dimensions

Recommended PCB Layout

Circuit Diagram

2

4

1

3

0.6

(.024)

2.8

(.110)

4.3

(.169)

4.50 + 0.25 / - 0.15

(.177 + .010 / - 0.06)

4.3

(.169)

2.6

(.102)

4.5

(.177)

0.35

(.014)

0.45 + 0.15 / -0.10

(.018 + .006 / - .004)

0.55 + 0.15 / - 0.10

(.022 + .006 / - .004)

3.7

(.146)

12

34

3.0

(.118)

4.8

(.189)

2.85

(.112)

4.85

(.191)

12

3

4

How to Order

STJ N - 4 05 - N TR

Model

Thin SMD Tact Switch

Product Code

N = Non-washable

Size

4 = 4.5 mm

Height

05 = 0.55 mm (without knob)

Actuating Force

N = 160 gf (1.6 N)

P = 240 gf (2.4 N)

Packaging

TR = Embossed Tape

10,000 pcs./reel

Reflow Soldering Profile

Time (Seconds)

275

30-40 Sec.

120 °C

225

175

125

75

25

0

20

40

60

80

100 120 140 160 180 200

80-90 Sec.

10-15

Sec.

35-60

Sec.

180 °C

240 °C

REV. 02/06

DIMENSIONS:

MM

(IN)

Model STJN-4 is currently available,

although not recommended for new

designs.