Page 1
unimec™
Switch function:
0: momentary
5: alternate
Terminal:
1: silver
2: gold
0: quiet version, silver
1
3
5
7
2
4
6
8
1
3
5
7
2
4
6
8
+
+
-
-
+
+
-
-
Circuit diagrams
Without LED
With round LED
16920 & 16921
Rectangular LED 16922
With LED
16923 & 16924
1
3
5
7
2
4
6
8
13,1
3,0
1
3
5
7
2
4
6
8
1
3
5
7
2
4
6
8
+
+
-
-
+
+
-
-
PCB mounting holes basic switch
Circuit diagrams
Without LED
With round LED
16920 & 16921
1
3
5
7
2
4
6
8
+
+
-
-
+
+
-
-
Circuit diagrams
Without LED
With round LED
16920 & 16921
With round LED
16920 & 16921
1
3
5
7
2
4
6
8
+
+
-
-
+
+
-
-
With round LED
16920 & 16921
With LED
16923 & 16924
21
43
65
87
PCB Mounting Hole Circuit diagram PCB Mounting hole Functional diagram
Dimensions Dimensions
Basic Switch (w/Extender 16250)
Without LED With round LED With rect. LED With LED ––– up
16920 and 16921 16922 16923 and 16924 ---- down
Wiring Diagram Select the contact function you desire - and design your PC board accordingly Operating Force
unimec basic switch modules
5.6
10.1
12.6
12.6
3.3
12.6
12.6
2.54
Ø = 0.9
2.54
21
43
65
87
21
43
65
87
+
+
---
-
+
+
21
43
65
87
-++
-
21
43
65
87
3.0
13.1
4
Force (N)
21
43
65
87
15
Part no.
Temperature:
5: low temp.
4: high temp.
Switch function:
0: momentary
5: alternate
Terminal:
1: silver
2: gold
0: quiet version, silver
Standard stock items: 15501 - 15551
Other versions: 15401 - 15451 - 15452 - 15502 - 15552 - 15500
Base module -
applies to all versions
( Typical example )
unimec
™
basic switch modules
Basic module applies to all versions
Low temp.
15.500 15.501 15.502 15.551 15.552
Key actuator
Moving contacts
How to Assemble
15XXX basic switch modules
■ Max. 250mA/120V/9W AC/6W DC
■ 2 pole
■ Momentary or latching
■ 8 contact functions
■ Temperature range:
High temp: -40/+160ºC
■ rough-hole version (TH)
All dimensions in mm Tolerances -/+0.2mm
DIMENSIONS THROUGH-HOLE
5.6
10.1
12.6
PCB MOUNTING HOLE DIMENSIONS FUNCTIONAL DIAGRAM CIRCUIT DIAGRAM
Basic switch
2,54
2,54
Ø 0,9
WIRING DIAGRAM
3.3
12.6
w/Extender 16250
1
3
5
7
With LED
16923 and 16924
2
4
13,1
6
8
3,0
12.6
12.6
up
- - down
Select the contact function you require - and design your PC board accordingly
1 make
contact
HOW TO ORDER
Part no:
Switch function:
0 momentary
5 latching
High temp.
1 5 4
1 break
contact
1 change over
contact
Terminal:
1 silver
2 gold
0 quiet version
2 make
contact
2 break
contact
HOW TO ASSEMBLE
unimec™
15X XX+16 3 0 0 +16310
OPERATING FORCE (TYPICAL EXAMPLE)
-
-
+
1
3
5
7
2
4
6
8
1
3
5
7
+
+
2
4
6
8
-
-
+
Without LED With round LED
16920 and 16921
2 change over
contact
2 make and
2 break
unimec™
15XXX+16270
+16300 +16324
force
1
3
5
7
With rect. LED
+
-
reverse
polarity
travel
-
-
+
16922
+
2
4
6
8
-+ -+
15.420
H
15.401
E
For product updates and/or changes of specifications please see www.mec.dk
52
15.402
F
15.451
I
15.452
J
Page 2
unimec™
Technical specications
RoHS Compatible
RA
High Temperature Versions
Silver Gold
Electrical Specifications
Contact resistance Max. 100 m Ω (initially)
Insulation resistance >10 M Ω
Recommended load Min. 0.5 mA Min. 0.5μ A
Max. 250 mA – 120 V – 9W AC – 6W DC
Max. Current in non switching state 0.5 A
Contact bounce Max. 10 ms
Dielectric strength between adjacent contacts 1000 V for 2 min.
Insulation resistance between adjacent contacts 5 X 10
Capacitance between adjacent contacts 0.5 pF
Mechanical Specifications
Standard actuation force (switch) Typ 2 . 5N
Max. Actuation force without cap 100N for 10 sec.
Key travel (switch) 1.8 mm
Lifetime Momentary >10.000.000 cycles
Latching 5.000.000 cycles
Temperature range
Working temperature Min. -40⁰C Max. +160⁰C
Storage temperature Min. -65⁰C Max. +160⁰C
Soldering IEC 68-2-20 Wave – max 260⁰C for max. 10 sec., please refer to usage guidelines
Environmental Endurance IEC 68-2-3
Tem pera ture +40⁰C
Humidity 93% RH
Duration 56 days
Sealing IEC 529 IP-54
Cleaning Standard methods such as water and soap (not immersed)
Material Specifications – Switches
Housing and actuator LCP U L94V0
Switch spring Stainless steel
Key spring Stainless steel
Latch pin Stainless steel
Fixed contact SnCu+2μNi+3μAg SnCu+2μNi+3μAu
Moving contact Stainless steel +3μAg Stainless steel +3μAg+1μAu
Terminals SnCu+2μNi+3μSn100
Contact lubricant Special protective lubricant Klüber Barrierta I EL Fluid
Material Specifications – All Caps & Bezels ABS (standard) UL94HB
Temperature limit Max. +65⁰C
Tampon Printing According to ISO Class: 1/ASTM Class:4B
13
Ω
Soldering iron – max. 350⁰C for max. 3 sec. Flux tight.
unimec™ LEDs
Part Nos. 16920/16921 16922 16923 16924
Colour (G=green, Y=yellow, R=red) G Y R G Y R B G Y W R G Y R
Colour Codes 02 04 08 02 04 08 00 20 40 65 80 23 45 88
Absolute Maximum Ratings (Ta=25⁰C)
Power mW 10 0 100 100 135 135 135 105 70 60 120 60 150 130 300
Current forward mA 30 30 30 30 30 30 30 20 20 25 20 40 40 90
Forward peak current mA 50 50 50 90 90 90 200 60** 60** 100 60** 500 500 1000
Voltage reverse V 5 5 5 5 5 5 5 3 3 5 3 12 12 5
Operating temperature ⁰C -25 - +100 -55 - +100 -25 - +85 -55 - +100
Storage temperature ⁰C -25 - +100 -55 - +100 -30 - +100 -55 - +100
Soldering temperature ⁰C +245 for max. 3 sec +300 for max. 3 sec +260 for max. 5 sec +300 for max. 3 sec
Electrical-Optical Characteristics (Ta=25⁰C)
Voltage forward Ty p. V 2.0 2.0 2.0 2.1 2.2 2.3 2.1 2.1 2.1 3.8 2.0 2 .1* 2.3*** 2.4***
Max. V 3.0 3.0 3.0 3.0 3.0 3.0 2.8 3.0 3.0 4.3 3.0 2.5* 2.5*** 3.8***
Current reverse μA 100 100 100 100 100 100 2 10 10 50 10 10 10 10
Wave leng th nm 560 590 660 565 585 635 460 563 585 NA 650 570 587 635
Spread Ønm 10 10 10 10 10 10 40 40 40 NA 40 25 45 45
Spread angle Degree 20 20 20 45 45 45 20 45 45 25 45 80 90 55
Luminous Intensity Min. mcd 1 1 0.8 1.5 2.5 2.5 20 9. 0 5.6 630 5.6 71**** 71**** 100****
Typ. mcd 2 3 1.6 2.5 3.0 5.0 25 25 16 1000 16 112**** 112**** 160****
Orientation The longer pin is the anode, the shorter is the cathode.
*/F=20mA, **Pulse width 1ms Duty cycle 1:5, ***/F=50mA, ****Luminous Flux mlm
For product updates and/or changes of specifications please see www.mec.dk
55
Page 3
Usage guidelines
How to get the best results with MEC Switches?
These guidelines are offered to users of MEC Switches as an aid to
ensure successful and reliable switch operation.
Temperature
Both unimec™ and multimec® switches are produced in low and high
temperature versions. Please see the technical specifications for details on operating and storage temperatures and soldering guidelines
to make sure you select the best switch for your application. When
wave soldering is taking place, MEC strongly recommend that the
temperature profile is analysed and compared with the temperature
rating of the switch. In case of doubt always select the high temperature versions unimec™ 154XX, and multimec® 5XXH9XX. It is also
important to monitor the accumulated heat build up from both the
pre-heat zones and the solder zone.
Most standard accessories for both unimec™ and multimec® switches
are made from ABS plastic with a maximum operating temperature of
65°C. It is strongly recommended that accessories are mounted after
soldering of the switch. If this is not possible care must be taken not
to overheat the accessories during the soldering process. The 1SS,
1GAS/1GCS and Varimec™ caps are, however, made of high temperature materials and will meet the same temperature specifications as
the high temperature switches.
For accessories made from other plastic materials please see multimec® and unimec™ technical specifications.
LEDs have their own temperature specifications. When fitted in a high
temperature switch the LED will determine the max. operating temperature, i.e. 5GTH93524 has an upper temperature limit of 85°C!
This also applies with 3F switches.
Mounting and Dismounting
If switches are to be mounted in rows it is essential that the recommendations regarding spacing are followed. PC board thickness
should be 1.4±0.2 mm and terminal hole diameter should be 0.9mm.
All unimec™ and multimec® caps and bezels are easily snapped onto
the switch modules and can be changed at a later time with the exception of the unimec 16.700 cap. The same applies to the 3E caps. Once
these caps are installed they are not designed to be removed. To do
so may cause damage to the switch and the PC board if not done
very carefully. If the 16.300 or 16.700 cap must be removed from a
unimec™ alternate action switch, make sure that the switch actuator is
in the released, upper position before attempting to remove the cap.
This will prevent possible damage to the internal latching pin.
Care must be taken when inserting the 3FT switch and LED assembly
into the PC board. Do not press direct on the LED. This will force the
LED down into the actuator and risks to cause the switch contacts to
remain in the closed position. To correct the fault, the LED must be
raised slightly and centered in the actuator to assure unrestricted
movement of the actuator. A mounting tool is available for multimec®
switches.
Soldering and Cleaning unimec™
Most assembly and field problems experienced by users of unsealed
switches are caused by the contamination of the contacts during
soldering and cleaning.
Contact contamination may be recognised by an increase in contact
resistance and possible intermittent operation of the switch, especially in low power applications. Care must be taken not to submerge
the switch in cleaning agents or spray the switch during cleaning. The
switch must be protected at all times to prevent contamination by flux
or cleaning liquids.
For unimec™ alternate versions we recommend to leave the actuator in the released upper position during soldering. This makes the
switch more resistent to overheating.
Soldering and Cleaning multimec®
multimec® switches are fully sealed to IP67 specifications to prevent
solder flux and aqueous based cleaning solutions from entering the
switch and contaminating the contacts. The switches can be placed on
the PC board with other components and wave soldered. multimec®
offers a high level of sealing, however, with aqueous solvent solutions care must be taken to avoid the worst case situation with water
jets, complete immersion into a liquid with a temperature below the
board or surface tension reducing additives.
Recommended cleaning methods are demineralized water. Any surface tension reducing agents, such as soap, must not be used as they
risk causing a potential leakage of the switch.
Soldering - Through Hole Versions
Hand soldering: Max. 350°C for max. 3 sec., this applies for both low
temperature and high temperature versions.
Wave soldering: heat built up in the switch during pre-heating and
soldering must not exceed the maximum operating temperature of
the switch. If, for some reason, a high pre-heating temperature is
required, MEC recommend the high temperature switches. In any
case peak temperature must not exceed 260°C, and soldering time
is max 10 sec.
Soldering - Surface Mount Versions
For all methods - infrared, convection and vapour phase. The upper
limit 260°C/30 sec must be observed. The soldering temperature
profile must have moderate temperature gradients.
RoHS Compliance
As of 1 July 2006 MEC has completed the conversion to RoHS compliance. For more info please see our homepage www.mec.dk
Temperature Limits:
Low temperature switch 115°C
High temperature switch 160°C
LEDs 85/100°C
Accessories 65/85/160°C
Packaging
unimec™ and multimec® switches are packed in rigid tubes of 50
pieces each.
A box contains 1.000 pcs.
The surface mount versions of multimec®switches with a height up
to 12.5mm can also be delivered on tape/reel. Each reel contains
250/500 pcs.
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