CN-0250-1 Change Notice NP01 Series Illuminated Pushbuttons Change of Bicolor LED Specifications Type of Change: Engineering Product Part Number Appearance The NP01 Series Illuminated Pushbuttons will have changes to the bicolor LEDs. The change will effect all bicolor models, both standard and custom. Differences in the LED specification values are outlined in the following table. NP01 Pushbutton Electrical Specifications for NP01 Bicolor LED Electrical specifications are determined at a basic temperature of 25°C. Before Change After Change CF CF ATTENTION ELECTROSTATIC SENSITIVE DEVICES Red/Green Bicolor LED Color Red Green Red Green Maximum Forward Current IFM 50mA (20) 30mA (20) 30mA (25) 25mA (25) Typical Forward Current IF 20mA (15) 20mA (7.5) 20mA (20) 16mA (5) Typical Forward Current for Alternating Legends IF 30mA 25mA 20mA 16mA Forward Voltage VF 2.0V 3.5V 1.95V 3.3V Maximum Reverse Voltage VRM 5V 5V 5V 5V Current Reduction Rate ∆IF 0.88mA/°C above 40°C 0.48mA/°C above 30°C 0.40mA/°C above 25°C 0.33mA/°C above 25°C Ambient Temperature Range –25° ~ +50°C L4 (-) Green LC2 (+) L3 (-) Red L2 (-) Red LC1 (+) L1 (-) Green –25° ~ +50°C Notes • Specifications in ( ) in table above denote simultanious illumination of Red and Green. • LEDs are an integral part of the switch and are not available separately. • If the source voltage exceeds the rated voltage, a ballast resistor is R + required. The resistor value can be calculated by using the formula shown here. E • The changes to bicolor LEDs do not affect any external dimensions of the switches. – • Contact the factory if further details are needed. IF Anode VF R = Where: R = E = VF = Cathode IF = E – VF IF Resistor Value (Ohms) Source Voltage (V) Forward Voltage (V) Forward Current (A) NP01 Part Numbers Effected by Bicolor LED Specification Changes NP0115AG03LCF-JB NP0115AG03LCF-J01 NP0115AG03LCF-J02 NP0115AG03LCF-J03 NP0115HG03LCF-JB NP0115HG03LCF-J01 NP0115HG03LCF-J02 NP0115HG03LCF-J03 Effective Date Changes to Bicolor LEDs will be effective April 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 2015/04/06 Engineering Department