D405: use Nexperia part sourced from Digi-Key direct The previously selected part was from a Digi-Key marketplace vendor, and they seem to not actually have that part, as the order has been in limbo for over a month - so I put in the time and effort to look around, and found a readily available equivalent part from Nexperia.

/* transistor with external bias resistors */

module transistor_ext_bias (E, B, C);

inout E, B, C;

wire int_base;

transistor_slot Q (.E(E), .B(int_base), .C(C));

resistor Rbase (B, int_base);
resistor Rbe (int_base, E);

endmodule