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