Current limiting resistor needed in series with one lead. When connected directly to DCC voltage, Litchfield Station, LLC recommends a 750 to 1500 ohm resistor The lower the resistor value, the brighter the light, but the shorter the life of the LED. With a 1000 ohm resistor, expect a life of about 5000 illuminated hours (over 6 months of 24 hours a day, every day).
3 mm nominal diameter (T1 size)
2-LEAD These LEDs, also know as bidirectional, are great to use as an indicator with Tortoise motors. They show which direction the current is flowing in the Tortoise!