  We derive bounds to the thermodynamic uncertainty relations in the
linear-response regime for steady-state transport in two-terminal systems when
time reversal symmetry is broken. We find that such bounds are different for
charge and heat currents and depend on the details of the system, through the
Onsager coefficients, and on the ratio between applied voltage and temperature
difference. As a function of such a ratio, the bounds can take any positive
values. The bounds are then calculated for a hybrid coherent superconducting
system using the scattering approach, and the concrete case of an Andreev
interferometer is explored. Interestingly, we find that the bound on the charge
current is always smaller than 2 when the system operates as a heat engine,
while the bound on the heat current is always larger than 2 when the system
operates as a refrigerator.
