What it is and where it fits
The Siemens 6GT2812-1EA00 is the RF620A antenna for the SIMATIC RF600 RFID system, operating in the 865-868 MHz ETSI band with linear polarization. It's built for industrial RFID read points where you need a compact, sealed antenna that drops right into the topology of a zoned conveyor or material handling line. The IP67 rating means the antenna body and the RP-TNC connection withstand washdown environments — suitable for food-and-bev lines, outdoor logistics yards, or any area where hose-down cleaning is routine. Operating temperature spans -20 to +70 °C, covering most indoor industrial conditions and sheltered outdoor installations.
Key ratings and what they mean for fit
The 50 Ω impedance and maximum VSWR of 2 mean this antenna presents a clean match to standard RFID reader ports — no impedance-matching pad needed between the reader and the RP-TNC connector. The 0.3 m pigtail with male RP-TNC is short enough to keep cable loss negligible, but you'll need an extension cable (antenna cables 1 to 40 m are listed accessories) to reach a reader mounted in a cabinet. Beam pattern is 75° vertical by 100° horizontal, which gives a broad read zone across a conveyor belt or pallet footprint without needing multiple antennas. The -5 dB gain with linear radiation is typical for a compact patch antenna in this band — adequate for read ranges up to several meters in a clean RF environment. The PA 12 housing and silicon-free construction (marked Yes for silicon-free) matter if this antenna goes into a paint shop or clean-coat application where silicone outgassing would cause fisheyes or adhesion failures. Fastening is via two M5 screws, so it mounts directly to a bracket or machine frame without a separate adapter plate.