Membranes
Series FM
DISTINCTIVE CHARACTERISTICS
• Nonilluminated options in 4 or 16 keys, illuminated choices in 12 or 16 keys
• 1.0mm (.039”) tail pitch
• Easily integrated into designs: replaces multiple mechanical switches, soldered
wires and cable assemblies
• Card insertion into design supports customized legends for nonilluminated models
• Actuating dome offers crisp, tactile feedback to positively indicate circuit transfer
• Illuminated models feature legends on embossed keypads
• Adhesive backing for easy mounting
GENERAL SPECIFICATIONS
Power Level
20mA @ 24V DC
Contact Resistance
Insulation Resistance
Dielectric Strength
Operational Life
500Ω maximum (10mA @ 10V DC)
100 megohms minimum @ 250V DC minimum
250V AC minimum for one minute minimum
1,000,000 operations minimum
10 milliseconds maximum
Contact Timing
Nominal Operating Force
1.0N ~ 6.0N
Stroke:
Nonilluminated
Illuminated with Overlay
.016” ~ .039” (0.4mm ~ 1.0mm)
.020” ~ .047” (0.5mm ~ 1.2mm)
–15°C ~ +50°C (+5°F ~ +122°F) illuminated
–15°C ~ +55°C (+5°F ~ +131°F) nonilluminated
Operating Temperature Range
LED SPECIFICATIONS
Single Element LED Color: Amber
Unit
The electrical specifications
shown are determined at a
basic temperature of 25°C.
LED is an integral part of
the switch. LEDs are not
sold separately.
E – VF
R
I
F
+
–
R =
Forward Voltage (Typical)
Forward Current (Typical)
Forward Current (Maximum)
* Forward Peak Current (Max)
Reverse Voltage (Maximum)
VF
IF
2.1
20
30
V
IF
Anode
Where: R = Resistor Value (Ohms)
E = Source Voltage (V)
mA
mA
mA
V
E
V
F
VF = Forward Voltage (V)
IF = Forward Current (A)
Cathode
IF
IFM 195
LED circuits are isolated and require an external power source.
If the source voltage exceeds the rated voltage, a ballast resistor is required.
VR 5.0
* Note: Pulse width 0.1msec maximum with a maximum duty cycle ratio of 1/10
L
Ordering Information
Part Number
Description
Surface Sheet
Illumination
Number of Keys
Overlay
Black (D)
Gray (E)
FMBN04BD
FMBN04BE
FMBN16BD
FMBN16BE
FMBP12BF
FMBP16BF
4
4
•
•
•
Nonilluminated
16
16
12
16
•
Dot Illuminated
with
Gray Surface Sheet with
Embossed White Keypad
and Gray Legends
Overlay
www.nkk.com
L15