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