Change Notice
CN-0033
EB, MB24, & M Rockers Series
New AT617F LEDs
Type of Change:
Engineering
Product
AT617F LED
Part Number
Appearance
(3.0) Dia
.118
(5.0)
.197
• The new AT617F (Green) LED uses lower power consumption than the previous model.
• The specifications for AT617F LED supersede all previous LED specifications.
(+)
• There is no change in size to the AT617F LED.
(–)
AT617 Green LED Specifications
Single Element LED
(+)
Before Change
After Change
F
F
Green
Green
(-)
Forward Peak Current
I FM
30mA
25mA
Continuous Forward Current
IF
24mA
20mA
Forward Voltage
VF
2.1V (I F = 24)
2.2V (I F = 20)
Reverse Peak Voltage
VRM
5V
5V
Current Reduction Rate Above 25°C
∆I F
0.40mA/°C
0.33mA/°C
–15°C ~ +70° C
–15°C ~ +70° C
Ambient Temperature Range
The LED circuit is independent of switch operation.
Electrical specifications are determined at a basic temperature of 25°C.
If the source voltage exceeds rated voltage, a ballast resistor is required.
The resistor value can be calculated by using the formula shown here.
R
+
IF
Anode
VF
E
Cathode
–
R =
Where: R =
E =
VF =
IF =
E – VF
IF
Resistor Value (Ohms)
Source Voltage (V)
Forward Voltage (V)
Forward Current (A)
Notes: 1. Confirm resistor value due to change in Forward Peak Current (I FM) and Continuous Forward Current (I F).
2. AT617F LED is used with AT212 Bezel (requires two LEDs). Series affected include EB Pushbuttons,
MB24 Pushbuttons and M Rockers.
Availability
AT617F LED with new specifications will be available with December 2008 production.
www.nkkswitches.com
1.877.2BUYNKK
228.9655
Engineering Department
7850 East Gelding Drive • Scottsdale, AZ 85260
Telephone 480.991.0942 • Fax 480.998.1435
10/22/08