0251 - NKK Switches

CN-0251
Change Notice
YB Series Illuminated Pushbuttons
Change of Bicolor LED Specification for AT621
2-Volt without Resistor
Type of Change:
Engineering
Product
Part Number
Appearance
The YB Series Illuminated Pushbuttons and Indicators will have a change to the
AT621 2-volt 6-element bicolor LEDs without resistors. The change will effect all
models, both standard and custom. Differences in the LED specification values
are outlined in the following table.
YB Pushbuttons
Electrical Specifications for AT621 Bicolor LED
Bicolor AT621
2CF
Red/Green
T-1 ⁄ Bi-pin
12
Electrical specifications are determined at a
basic temperature of 25°C.
Before
Change
After
Change
02
02
Bicolor LED is translucent white in OFF state.
(+)
Maximum Forward Current
IFM
60 mA
60 mA
Typical Forward Current
IF
45 mA
45 mA
Forward Voltage (Red/Green)
VF
2.0 / 2.1V
1.9 / 2.1V
Current Reduction Rate Above 25°C
∆IF
0.80 mA/°C
0.80 mA/°C
–25 ~ +50 °C
–25 ~ +50 °C
Ambient Temperature Range
(-)
AT621 Bicolor
LED 2-volt
6-element
without Resistor
Notes
• The LED circuit is isolated and requires an external power source.
• If the source voltage exceeds the rated voltage, a ballast resistor is
required. The resistor value can be calculated by using the formula
shown here.
• The change to AT621 bicolor LED does not effect any external
dimensions of the switches or indicators.
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)
• Contact the factory if further details are needed.
Effective Date
Changes to AT621 Bicolor LEDs will be effective September 2015.
http://www.nkkswitches.com • 1.877.2BUYNKK (228.9655)
7850 East Gelding Drive • Scottsdale, AZ 85260 • Telephone 480.991.0942 • Fax 480.998.1435
2015/08/25 Engineering Department
Page 1 of 3
Change Notice
CN-0251
YB Series Illuminated Pushbuttons
Change of Bicolor LED Specification for AT621
2-Volt without Resistor
The AT621 bicolor LEDs will have changes to electrical specifications. These changes
will effect all models, both standard and custom, of YB illuminated pushbuttons and
indicators. Standard part numbers effected by these changes are listed in the following
tables.
AT621 Bicolor LED
YB15 Part Numbers Effected by AT621 Bicolor LED Specification Change
YB15SKW01-2CF02-JB
YB15SKW03-2CF02-JB
YB15SKG01-2CF02-JB
YB15SKG03-2CF02-JB
YB15CKW01-2CF02-JB
YB15CKW03-2CF02-JB
YB15CKG01-2CF02-JB
YB15CKG03-2CF02-JB
YB15RKW01-2CF02-JB
YB15RKW03-2CF02-JB
YB15RKG01-2CF02-JB
YB15RKG03-2CF02-JB
YB15KKW01-2CF02-JB
YB15KKW03-2CF02-JB
YB15KKG01-2CF02-JB
YB15KKG03-2CF02-JB
YB15MKW01-2CF02-JB
YB15MKW03-2CF02-JB
YB15MKG01-2CF02-JB
YB15MKG03-2CF02-JB
YB15NKW01-2CF02-JB
YB15NKW03-2CF02-JB
YB15NKG01-2CF02-JB
YB15NKG03-2CF02-JB
YB15WSKW01-2CF02-JB
YB15WSKW03-2CF02-JB
YB15WSKG01-2CF02-JB
YB15WSKG03-2CF02-JB
YB15WCKW01-2CF02-JB
YB15WCKW03-2CF02-JB
YB15WCKG01-2CF02-JB
YB15WCKG03-2CF02-JB
YB15WRKW01-2CF02-JB
YB15WRKW03-2CF02-JB
YB15WRKG01-2CF02-JB
YB15WRKG03-2CF02-JB
YB16 Part Numbers Effected by AT621 Bicolor LED Specification Change
YB16SKW01-2CF02-JB
YB16SKW03-2CF02-JB
YB16SKG01-2CF02-JB
YB16SKG03-2CF02-JB
YB16CKW01-2CF02-JB
YB16CKW03-2CF02-JB
YB16CKG01-2CF02-JB
YB16CKG03-2CF02-JB
YB16RKW01-2CF02-JB
YB16RKW03-2CF02-JB
YB16RKG01-2CF02-JB
YB16RKG03-2CF02-JB
YB16KKW01-2CF02-JB
YB16KKW03-2CF02-JB
YB16KKG01-2CF02-JB
YB16KKG03-2CF02-JB
YB16MKW01-2CF02-JB
YB16MKW03-2CF02-JB
YB16MKG01-2CF02-JB
YB16MKG03-2CF02-JB
YB16NKW01-2CF02-JB
YB16NKW03-2CF02-JB
YB16NKG01-2CF02-JB
YB16NKG03-2CF02-JB
YB16WSKW01-2CF02-JB
YB16WSKW03-2CF02-JB
YB16WSKG01-2CF02-JB
YB16WSKG03-2CF02-JB
YB16WCKW01-2CF02-JB
YB16WCKW03-2CF02-JB
YB16WCKG01-2CF02-JB
YB16WCKG03-2CF02-JB
YB16WRKW01-2CF02-JB
YB16WRKW03-2CF02-JB
YB16WRKG01-2CF02-JB
YB16WRKG03-2CF02-JB
http://www.nkkswitches.com • 1.877.2BUYNKK (228.9655)
7850 East Gelding Drive • Scottsdale, AZ 85260 • Telephone 480.991.0942 • Fax 480.998.1435
Page 2 of 3
Change Notice
CN-0251
YB Series Illuminated Pushbuttons
Change of Bicolor LED Specification for AT621
2-Volt without Resistor
YB25 Part Numbers Effected by AT621 Bicolor LED Specification Change
YB25SKW01-2CF02-JB
YB25SKW03-2CF02-JB
YB25SKG01-2CF02-JB
YB25SKG03-2CF02-JB
YB25CKW01-2CF02-JB
YB25CKW03-2CF02-JB
YB25CKG01-2CF02-JB
YB25CKG03-2CF02-JB
YB25RKW01-2CF02-JB
YB25RKW03-2CF02-JB
YB25RKG01-2CF02-JB
YB25RKG03-2CF02-JB
YB25KKW01-2CF02-JB
YB25KKW03-2CF02-JB
YB25KKG01-2CF02-JB
YB25KKG03-2CF02-JB
YB25MKW01-2CF02-JB
YB25MKW03-2CF02-JB
YB25MKG01-2CF02-JB
YB25MKG03-2CF02-JB
YB25NKW01-2CF02-JB
YB25NKW03-2CF02-JB
YB25NKG01-2CF02-JB
YB25NKG03-2CF02-JB
YB25WSKW01-2CF02-JB
YB25WSKW03-2CF02-JB
YB25WSKG01-2CF02-JB
YB25WSKG03-2CF02-JB
YB25WCKW01-2CF02-JB
YB25WCKW03-2CF02-JB
YB25WCKG01-2CF02-JB
YB25WCKG03-2CF02-JB
YB25WRKW01-2CF02-JB
YB25WRKW03-2CF02-JB
YB25WRKG01-2CF02-JB
YB25WRKG03-2CF02-JB
YB26 Part Numbers Effected by AT621 Bicolor LED Specification Change
YB26SKW01-2CF02-JB
YB26SKW03-2CF02-JB
YB26SKG01-2CF02-JB
YB26SKG03-2CF02-JB
YB26CKW01-2CF02-JB
YB26CKW03-2CF02-JB
YB26CKG01-2CF02-JB
YB26CKG03-2CF02-JB
YB26RKW01-2CF02-JB
YB26RKW03-2CF02-JB
YB26RKG01-2CF02-JB
YB26RKG03-2CF02-JB
YB26KKW01-2CF02-JB
YB26KKW03-2CF02-JB
YB26KKG01-2CF02-JB
YB26KKG03-2CF02-JB
YB26MKW01-2CF02-JB
YB26MKW03-2CF02-JB
YB26MKG01-2CF02-JB
YB26MKG03-2CF02-JB
YB26NKW01-2CF02-JB
YB26NKW03-2CF02-JB
YB26NKG01-2CF02-JB
YB26NKG03-2CF02-JB
YB26WSKW01-2CF02-JB
YB26WSKW03-2CF02-JB
YB26WSKG01-2CF02-JB
YB26WSKG03-2CF02-JB
YB26WCKW01-2CF02-JB
YB26WCKW03-2CF02-JB
YB26WCKG01-2CF02-JB
YB26WCKG03-2CF02-JB
YB26WRKW01-2CF02-JB
YB26WRKW03-2CF02-JB
YB26WRKG01-2CF02-JB
YB26WRKG03-2CF02-JB
YB Indicator Part Numbers Effected by AT621 Bicolor LED Specification Change
YB01KW01-2CF02-JB
YB02KW01-2CF02-JB
YB03KW01-2CF02-JB
YB04KW01-2CF02-JB
YB01WKW01-2CF02-JB
YB02WKW01-2CF02-JB
YB03WKW01-2CF02-JB
YB05KW01-2CF02-JB
YB06KW01-2CF02-JB
http://www.nkkswitches.com • 1.877.2BUYNKK (228.9655)
7850 East Gelding Drive • Scottsdale, AZ 85260 • Telephone 480.991.0942 • Fax 480.998.1435
Page 3 of 3