Technical Data Customized Prototypes

Dimensions	6.5 x 8.5 mm, Tolerance +/- 0.2 mm
Terminals	Material C5191; T=0.3; Plating Ni 3-4 um / Sn 3-20 um
Life endurance	20'000-500'000 cycles (depends on selected parameters)
Oper. Temp. range	-40°... +95°C

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Key parameter

It is easy to tailor the SMT Silicone Key. Below 6 numbers define your Customized Prototype and future SMT Silicone Key. Fill in the table and go to ordering. For detailed help please go to referenced chapters.

Please provide full part number for additional orders of customized samples or serial parts. Abatek needs full code in order to reproduce parts.

[example] SK301350815401

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Order Code Replaces Drawing for Customized Prototypes

The order code replaces drawings for customized prototypes and allows us to identify every customized SMT Silicone Key:

Key switch SK=Silicone Key	Key top diameter 30=3.0 mm	Contact Pill 0=no Pill 1=Carbon 2=SC-L 3=SC-M	Key height 3.5 mm to 7.5 mm	Stroke 0.8 mm to 1.8 mm	Actuation force 0.5 to 5.0 N	Snap 10% to 70%	Material & Life cycles 1=Standard Silicone 2=Longlife Silicone 3=Capacitive Silicone
SK	30	1	35	08	15	15	1

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Key top diameter

The overall size of SMT Silicone Key is defined by the key top diameter. We offer at the moment the diameter 3.0 mm only (SK30) for customized prototypes.

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Contact pill

The contact pill closes the contact on the PCB when key is pressed:

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Key height

Any key height between 3.5 mm and 7.5 mm can be selected in 0.10 mm increments.

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Stroke

Any stroke between 0.8 mm and 1.8 mm can be selected in 0.10 mm increments, independend from any key height.

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Actuation force

Any actuation force between 0.5 N and 5.0 N can be selected in 0.10 N increments.

F 1	Actuation Force
F 2	Contact Force
F 3	Return Force
Snap	(F1-F2) / F1*100%

Snap

Snap or tactile ratio is calculated by following formula: Snap = (F1-F2)/F1*100%

Snap	F 1 < 2.5 N	F 1 > 2.5 N
weak	30 %	20 %
medium	40 %	30 %
good	50 %	40 %
very high	60 %	50 %

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Material & life cycle

Life cycle depends very much on the selected Stroke, Acutation force and Snap. Actuating angle, actuating force, actuator shape, temperature & humidity etc all influence test results. We a standard silicone material, a long life silicone material for higher cylces and a capacitive silicone.

We strongly recommend testing life cycle in your specific application and environment. Typical life cylces are 20'000 - 500'000 cyles, depending on characteristics.

Code 1 = Standard Quality

Code 2 = Long life Quality, increases life cyles

Code 3 = Capacitive Silicone

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Capacitive SMT Silicone Key
One Key = Two Functions
Capacitive system with tactile long stroke
Conductive/Capacitive connector
(silicone as conductive spring)
Automated assembly SMT
Easy and fast ordering without drawing
Superior alternative to tact swichtes
works with and without plastic caps
No tooling costs

for Stand by / Sleep & Wake up functions

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