Semitec M5R114 inrush current limiter (thermistor) 5.1 ohms @25C, 6.5A
Attached is the relevant page (24) from the Semitech Product Catalog 129E. Couldn't find a good link to put here, but Google will help you find it if you want the whole thing.
May be discontinued, I don't see them for sale anywhere in small quantity. You may have to find something close, like around 5 ohms with a 6.5A or higher current rating.