SCHURTER GmbH
D – 79346 Endingen
www.schurter.com
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Product manual
Miniature – Push button switches
SMS(Surface mount) and PMS(PCB mount).
CONTENT
1. Product_Description
SMS/PMS_Base_module
SMS/PMS Variable Height
2. Technical data and dimensions
Technical data SMS/PMS
Dimensions SMS/ PMS Base module/Variable Height
Drilling diagram and Solder pads SMS/PMS Base module /Variable height
Circuit Diagram SMS/PMS
3. Part_numbers
Part numbers SMS/PMS Base module/Variable Height
4. Packaging
Packaging SMS/PMS Base Module/Variable Height
5. Qualification Tests
6. ROHS Compliant
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D – 79346 Endingen
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1 Description
1.1 SMS/PMS Base module
Miniature push button switches with a low height of 4,55 - 4,95 mm for surface mounting (SMS) and PCB
mounting (PMS).
The SMS has large flat surfaces on the top side as well as on the other sides, which are also parallel to ea ch
other. This makes the SMS a perfect switch for automatic mounting.
The SMS switch is suitable for the SMD solderin g process "IR-Reflow".
The switch comes with the SMD-leads "Gullwing and J". With J-leads the switch can b e lined up with a spacing
of 1/2" in one coordinate direction, and with > 13,5 mm in the other coordinate direction. With Gullwing-leads,
the switch can be arranged with a spacing of 1/2" in one coordinate direction, and in the other coordinate
direction with > 17,5 mm.
A minimum spacing of 1/2" to 15 mm is necessary for the PCB version.
Basically, the SMS and PMS come in two basic versions concerning the degree of protection. Available are IP
40 and IP 67. According to the degree of protection the IP 40 version is not proof against fluxing and washing,
whereas the IP 67 version is. Conseque ntly, the IP 67 version can be exposed to the specifie d soldering and
cleaning processe s.
The miniature push button switches feature a very good tactile response with an actuation force of a bout 2N.
SMS and PMS are also available with an elongated actuator. These variants se rve as base modules for the
SMS/PMS variable height version.
1.2 SMS/PMS Variable Height
The variable height SMS/PMS consists of the SMS/PMS base module with elongated actuator and a slip-on
button with eight variable heights.
The PMS will be supplied with a mounted button. The button for the SMS has to be ordered separately. After
soldering, the button must be put on the base module with elongated actuator.
Heights between 8,5 mm and 13,75 mm for the SMS and 8, 35 mm and 13,60 mm for the PMS are available.
Depending on the base module being used, de gree of protection for the variable height SMS/PMS is IP 40 or IP
67.
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2 Data and dimensional drawings
2.1 Technical Data SMS/PMS Base module/Variable Height
Electrical data: IP40 IP67
Contact material Gold ; Gold/Silver (1) Gold
Switching voltage max. 30V AC/ 42V DC 30V AC/ 42V DC
Switching current max. 50 mA 50 mA
Rated breaking capa city 12 V/10 mA 12 V/10 mA
Lifetime (at 12V/10mA) >1 x 10
6
cycles > 1 x 10
6
cycles
Lifetime (at 24V/80mA) - ; >1x105 (1) -
Initial contact resistance new (IE C 512-2 mV-method) <50 mOhm <50 mOhm
Initial contact resistance after 1 x 10
6
cycles <150 mOhm <150 mOhm
Insulation resistance (IEC 512-2) > 1x 10
8
Ohm > 1x 10
8
Ohm
Contact bounce time typ. 0,15 ms typ. 0,15 ms
Mechanical data: IP40 IP67
Actuating force 1,8±0,4 N 2,2±0,4 N
Actuating travel 0,35±0,1 mm 0,35±0,1 mm
Mechanical strength (force axial, load 1 min.) max. 100 N max. 100 N
Lifetime
(IEC 512-5. Test 9a. Actuating force 5N) >1x 10
6
cycles >1x 10
6
Soldering data: SMS PMS
IP40/IP67 IP40/IP67
Soldering method IR Reflow Wave soldering
Soldering heat resistan ce 245 °C/5sec. 248,5 °C/1sec
(1) PMS Typ 1241.1652
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Recommended IR-Reflow Profile for SMS
0
50
100
150
200
250
300
0 50 100 150 200 250 300
Time [s]
Temperature [C°]
Tolerance for Temperature settings T +0°C
(according to JEDEC J-STD-020C, Jul y 2004
)
Used Solder: Omnix O338 (Sn95.5%/Ag4%/Cu0.5%), Alpha Metals Loetsysteme GmbH
Recommended Wave Soldering Profile for PMS
Wave Soldering Equipment: ERSA EMS 3300
Throughput speed: 1m / min
Solder type:Sn100C from Nihon Superior (Balver-Solder)
Flux material:AW30 Fa. Otto
Adjustments Heating Zones
Upper Zone : 280 °C 300 °C
Lower Zone: 450°C 500 °C 560 °C
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Other data: SMS PMS SMS PMS
IP40 IP40 IP67 IP67
Operating temperature(°C) -40 to 85 -40 to 85 -40 to 85 -40 to 85
Storage temperature(°C) -40 to 85 -40 to 85 -40 to 85 -40 to 85
Degree of protection (DIN 40050) IP40 IP40 IP67 IP67
Cleaning agent proof
applied test agent 3) Zestron Zestron Zestron Zestron
Flux proof 1) _______ _______ given given
Wash proof 2) _______ _______ given given
1) Visual inspection of switch chamber after immersion in coliophonium solution flux for 3 seconds.
2) Inspection of switch chamber afte r washing process
3) CKW and FCKW free mix made of water soluable Glykolether
Mechanical data: SMS/PMS SMS/PMS
Component Flammability rating IP40 IP67
Socket UL94 V-0 Thermoplast (PA 4.6) Thermoplast (PA 4.6)
Actuator UL94 V-0 Thermoplast (PPS) Thermoplast (PPS)
Cover plate X12 Cr Ni 17 7 X12 Cr Ni 17 7
Sealing membrane UL94 HB ________ VMQ
Elongated button UL94 V-2 Thermoplast (PC) Thermoplast(PC)
Electrical data(material): SMS/PMS SMS/PMS
IP40 IP67
Snap dome X12 CrNi 17 7 gold plated on contact side
Contacts CuZn37 with Ni/Au coated; with Ag coated (1)
Terminals(leads) CuZn37 with Sn coated
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2.2 Dimensions SMS/PMS Base module/variable height
SMS Gullwing Base module SMS J-lead Base module PMS PCB Base module
SMS Gullwing Variable height SMS J-lead Variable height PMS PCB Variable height
SMS Gullwing and J lead with elongated button PMS PCB with elongated button
Gullwing J-Anschluss
Total height information: See point 3.1, Part numbers SMS und PMS Variable height, SMS elong ated button
must be ordered separately .
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2.3 Drilling diagram and Solder pads SMS/PMS Base module/variable height
Gullwing lead J-lead PCB lead
2.4 Circuit Diagram SMS/PMS
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3 Part numbers
3.1 Part numbers SMS/PMS Base module/Variable Height
Part-Nr. Base module
Type IP40 IP67
Gullwing lead 1241.1600.XX 1241.1606.XX
J-lead 1241.1601.XX 1241.1607.XX
Through hole lead 1241.1602 1241.1608
Part-Nr. Elongated base module
Type IP40 IP67
Gullwing lead 1241.1612.XX 1241.1618.XX
J-lead 1241.1613.XX 1241.1619.XX
Through hole lead 1241.1614 1241.1620
Ordering example
______________
Base module
_______________________
1241.XXXX.XX
Index 11 loose in boxes
Index 23 Blister tape
Part-Nr. Variable height PMS
Height in mm IP 40 IP67 Color
8,35 1241.1624.1 1241.1625.1 Yellow
9,10 1241.1624.2 1241.1625.2 Orange
9,85 1241.1624.3 1241.1625.3 Red
10,60 1241.1624.4 1241.1625.4 Blue
11,35 1241.1624.5 1241.1625.5 Green
12,10 1241.1624.6 1241.1625.6 Grey
12,85 1241.1624.7 1241.1625.7 Black
13,60 1241.1624.8 1241.1625.8 White
Part-Nr. Elongated buttons for SMS
Switch height SMS with mounted
buttons in mm
Part-Nr. Color
8,50 0862.8101 Yellow
9,25 0862.8102 Orange
10,00 0862.8103 Red
10,75 0862.8104 Blue
11,50 0862.8105 Green
12,25 0862.8106 Grey
13,00 0862.8107 Black
13,75 0862.8108 White
SCHURTER GmbH
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4 Packaging
4.1 Packaging SMS/PMS Base module/Variable Height
loose in boxes SMS/PMS - Index 11 for SMS 100 pieces
tape and reel for SMS base module - Index 23 700 pieces
tape and reel for SMS elonged. base module -Ind ex 23 450 pieces
5 Qualification Tests
6 ROHS Compliant