What this RF330T button does in the line
The Siemens 6GT2800-5BA00 is an RF330T RFID transponder from the SIMATIC RF300 family — a 30 mm diameter, 8 mm tall button that bolts directly onto metal surfaces via an M4 countersunk screw. It runs at 13.56 MHz and carries 32 KB of user memory on FRAM, with an additional 20 bytes of OTP memory. The IP68/IPx9K rating means it handles high-pressure hot-water washdown cycles in food, pharma, or heavy-industrial lines without sealing failures. The read range is 52 mm maximum, but that number depends on the specific RF300 reader head and the mounting environment — Siemens publishes a detailed application note (support reference 67384964) that maps actual range per reader model. On metal, the transponder is designed to work without performance loss; the PPS housing and 500 m/s² shock rating (DIN EN 60721-3-7 class 7M3) let it survive on vibrating machinery like conveyor drives or robotic end-effectors.
Memory structure and write protection
The 32 KB FRAM user memory is fast, non-volatile, and tolerates near-infinite write cycles — no wear-leveling needed. The OTP memory block (20 bytes) can be write-protected per block after programming, which is useful for locking serial numbers or calibration data on the tag. The UID is a fixed 4-byte code, and the tag supports multi-tag reading in the RF300 field. Operating temperature is -25 to +85 °C during read/write access, and storage range extends from -40 to +100 °C. The transponder has no backup battery, so there is no battery-replacement interval to track. Silicon-free construction is specified, which matters for potting or coating processes in automotive or electronics assembly.