CN-0250-2 Change Notice NP01 Series Illuminated Pushbuttons Change of Single Color LED Specifications Type of Change: Engineering Product Part Number Appearance The NP01 Series Illuminated Pushbuttons will have changes to the single color LEDs. The change will effect all single color models, both standard and custom. Differences in the LED specification values are outlined in the following table. NP01 Pushbutton Electrical Specifications for NP01 Single Color LED Electrical specifications are determined at a basic temperature of 25°C. Before Change After Change C D F C D F Color Red Amber Green Red Amber Green Maximum Forward Current IFM 50mA 50mA 30mA 30mA 30mA 25mA Typical Forward Current IF 20mA 20mA 20mA 20mA 20mA 16mA Forward Voltage VF 2.0V 2.1V 3.5V 1.95V 2.0V 3.3V Maximum Reverse Voltage VRM 5V 5V 5V 5V 5V 5V Current Reduction Rate ∆IF 0.88mA/°C above 40°C 0.88mA/°C above 40°C 0.48mA/°C above 30°C 0.41mA/°C above 25°C 0.38mA/°C above 25°C 0.33mA/°C above 25°C ATTENTION ELECTROSTATIC SENSITIVE DEVICES Ambient Temperature Range –25° ~ +50°C LC1 (+) Red or Green LEDs –25° ~ +50°C L2 (-) L1 (-) Notes • 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 required. The resistor value can be calculated by using the formula shown here. • The changes to single color LEDs do not affect any external dimensions of the switches. • Contact the factory if further details are needed. L4 (-) LC2 (+) Amber LED L3 (-) L2 (-) LC1 (+) R + L1 (-) IF Anode VF E – 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 Single LED Specification Changes NP0115AG03LC-JB NP0115AG03LD-JD NP0115HG03LC-JB NP0115HG03LD-JD NP0115AG03LC-JC NP0115AG03LF-JB NP0115HG03LC-JC NP0115HG03LF-JB NP0115AG03LD-JB NP0115AG03LF-JF NP0115HG03LD-JB NP0115HG03LF-JF Effective Date Changes to Single Color LEDs will be effective October 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 2015/10/21 Engineering Department