Board-Layout Fit for a 21-Pin Breakaway
All 21 positions are loaded, so the row is full — no blank spots.
Current, Temperature, and Contact Life
In a 21-position header with all circuits carrying current, the temperature rise in the center pins will be higher than at the ends — derate to 2.5 A per contact if the bundle is enclosed or the ambient exceeds 85°C.
The base product number is 77315; the -824-21LF suffix encodes the plating and packaging variant. No pin-compatible direct replacement is listed by the manufacturer — if you need a second source, look for other BERGSTIK® single-row 21-position right-angle headers with gold plating and verify the mating pin length matches your socket.
Material and Compliance Notes
Phosphor bronze contacts provide a good balance of spring retention and corrosion resistance for signal-level currents. The square pin profile mates with standard square-pin socket contacts.