Data Sheet no. 19N500
SERIES 19N – MICROSWITCH
FEATURES
•
Insert moulded terminals
– fully sealed base
•
Fully sealed version
– to IP67
•
Wide temperature range –
-40°C to +125°C
•
Choice of actuators as
standard
•
Approved product
– BEAB
•
Soldering Information
– 350° max. for 3 seconds
•
Non flammable switch
– UL94-VO rated
NON-STANDARD OPTIONS
•
Leaf lever available in variable
lengths (see ordering
information)
•
Custom levers/brackets
•
Multiple pole ‘ganged’
versions
Technical Information
Series 19N
The miniature microswitch (the standard V4 size) has been designed in line with similar
competitive products, but because of automation, offers consistent high quality levels for
volume applications, at no extra cost. The switch mechanism used is the well proven spring
and blade method, and is offered in a choice of operating forces.
Other standard options include gold or silver contacts; PCB, solder or QC terminals, and
integral wire lead versions. All versions have a fully sealed base right up to the bottom
opening. In addition, sealed button versions are totally environmentally sealed.
Mechanical
Overtravel
Movement differential
Mechanical life
Operating force
0,2mm (min) depress to case
0,1mm reference
10,000,000 cycles
See ordering information
Electrical (at 125°C)
Current (max) for silver contact versions (Inductive rating 0,6 PF)
Low operating force:
250V a.c. Resistive 2A
250V a.c. Inductive 1A
Standard operating force:
250V a.c. Resistive 5A
250V a.c. Inductive 1A
28V d.c. Resistive 3A
28V d.c. Inductive 1A
28V d.c. Resistive 2,5A
28V d.c. Inductive 1A
All gold contact versions: 100mA 28 VDC Resistive
Current (min)
All silver contact versions
All gold contact versions
Life (nominal) – full load
Dielectric strength
Insulation resistance
Contact resistance (initial)
Contact bounce
10mA 5V d.c. Resistive
1mA 5V d.c. Resistive
100,000 cycles
1000V a.c.
1GΩ
20mΩ (max) silver, 50mΩ (max) gold
5ms (max), 1ms per individual pulse
Environmental & Physical
Ingress protection
– with unsealed button
– with sealed button
Temperature
Button material
Body Material
Contacts
– silver versions
– gold versions
Terminals
– solder & PCB versions
– QC versions
IP40
IP67
-40°C to +125°C
Polyester
Nylon 46
Silver nickel alloy
5 microns of gold on copper/nickel
Tin plated brass
Brass
Approvals
Technical Information
Sealed Variants
Ordering Information
This variant is available in two versions, fully sealed and top sealed. The top seal incorporates a
rubber seal around the button to stop the ingress of contaminants through this area. If the
switch is to be activated by a cam, it would be advisable to do this via a lever, as using a cam
directly onto the button can cause damage to the diaphragm seal.
The fully sealed version has the top seal and also has integral leads ‘potted’ onto the terminals.
This version is rated at 125°C. There is also a derated version, to 105°C, available. This has the
advantage of being lower cost than the standard version. If you should require more
information on this version please contact the Sales Office.
Mounting Information
PCB Terminal version
This version mounts directly onto a PCB which has been drilled as illustrated. To ensure a tight
fit in the PCB during handling and flow soldering operations, the switch can be inserted into
the PCB, and then the terminals may be splayed by 30° in an alternate fashion. The terminals
have an in-line rectangular cross section to facilitate this, and to eliminate the reduction of
creepage distances in the fitted application.
Solder, QC and flying lead versions
These versions have two mounting holes that accept M2,5 screws (with anti-vibration washers
if relevant) tightened to a maximum torque of 0,3Nm. One of the mounting holes is slotted, to
allow for a tolerance between the screw centres of ±0,15mm. If the switch is being mounted
onto a metal surface, a separating insulator is recommended on the solder and QC versions, to
ensure bare wires cannot make electrical contact.
PCB Layout
(viewed from either side)
All dimensions
in Millimetres
Terminal Style
Solder
PCB
QC
Integral wire leads
4
5
6
7
19N
Contact Material
Silver
Gold
0
1
Button Op/Release Force
Op force
Unsealed button
Sealed button
Unsealed button
0,5N
2,0N
1,5N
Rel force
0,07N
0,27N
0,27N
1
2
3
Auxiliary Actuator Fitted
None fitted
Standard leaf lever
Standard roller lever
(leave blank)
L18
R15
Note
* L18 represents that this lever is 18mm long (see product drawing). Non standard leaf lever lengths are available in 1mm
increments from 18mm to 63mm. You may specify required lever length from between 18mm to 63mm as a non standard
option. If required, please reference the Sales Office.
Data Sheet no. 19N500
SERIES 19N
Microswitch
Technical Information
Product Dimensions
Button/lever positions
Free position (F.P)
Standard switch to mounting holes
Standard switch to PCB
Sealed switch to mounting holes
Leaf lever to mounting holes
Leaf lever to PCB
Roller lever to mounting holes
Roller lever to PCB
Operating point (O.P)
Standard switch to mounting holes
Standard switch to PCB
Sealed switch to mounting holes
Leaf lever to mounting holes
Leaf lever to PCB
Roller lever to mounting holes
Roller lever to PCB
8,40
11,60
8,50
10,15
13,38
15,50
18,25
±0,40
±0,40
±0,40
±1,37
±1,37
±1,14
±1,14
9,14
12,35
9,35
12,50
15,70
17
,20
20,40
max
max
max
max
max
max
max
All dimensions in Millimetres
Lever Operating Force (N)
0,7
0,6
0,5
0,4
All dimensions in Millimetres
Button operating force
2,0N
(see ordering information)
1,5N
0,3
0,2
0,1
0,0
15 20
30
40
50
Lever Length (mm)
60
0,5N
Arrow shows direction of force and point of
contact
Circuit Form
(yellow)
Graph to calculate operating force at end of lever
2NC
3NO
C1
(red)
FORM C
(blue)
Application References
• Telephone handsets
• Automotive controls
• Joysticks
• Security/anti-tamper uses
• Small motor limit switches
• Business machines
• Thermostat and sensor controls
Further Information
For further information on our complete range of switch products, visit our website –
www.itwswitchcon.com or contact our Sales Office.
ITW Switches, Division of ITW Limited, Norway Road, Hilsea, Portsmouth PO3 5HT, UK
Tel: +44 (0)2392 656200 Fax: +44 (0)2392 666352 Website: www.itwswitches.co.uk
Due to our policy of continuous product development, ITW Switches retain the right to change the specification at any time without prior notice.
Designed & printed in the UK.
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