What it is — Eurostyle 39700 three-way terminal block
The Molex 397000803 is the 3-circuit member of the Eurostyle 39700 series, a side-entry through-hole terminal block with a 5.00 mm pitch and a screwless push-button clamp termination. It is rated 10 A per circuit at 300 V, accepts 14–22 AWG wire, and ships in green PA66 housing rated for continuous operation from -40 °C to 105 °C.
Ratings and what they mean for the fit
The 10 A rating is a per-contact figure at 300 V. Tin-plated brass contacts are standard industrial grade for signal and power at this current level. The PA66 housing carries a 105 °C upper limit. The horizontal PCB entry orientation suits standard board layouts.