The paper investigates the electronic and superconducting properties of β12-B3H3, a hydrogenated borophene, which exhibits a strain-tunable phase transition from a Dirac semimetal with three Dirac cones to a single Dirac cone. The material is found to be stable and has good mechanical properties. It demonstrates superior phonon-mediated superconductivity with a critical temperature (Tc) of 32.4 K, which can be further enhanced to 42 K under external strain. The study highlights the potential of β12-B3H3 as a platform for exploring quantum phase transitions and superconductivity in 2D Dirac semimetals, particularly due to its unique combination of Dirac fermions and superconductivity. The findings suggest that light-element materials, such as borophenes, have the potential to realize both Dirac semimetallicity and superconductivity, making them attractive for further research and applications.The paper investigates the electronic and superconducting properties of β12-B3H3, a hydrogenated borophene, which exhibits a strain-tunable phase transition from a Dirac semimetal with three Dirac cones to a single Dirac cone. The material is found to be stable and has good mechanical properties. It demonstrates superior phonon-mediated superconductivity with a critical temperature (Tc) of 32.4 K, which can be further enhanced to 42 K under external strain. The study highlights the potential of β12-B3H3 as a platform for exploring quantum phase transitions and superconductivity in 2D Dirac semimetals, particularly due to its unique combination of Dirac fermions and superconductivity. The findings suggest that light-element materials, such as borophenes, have the potential to realize both Dirac semimetallicity and superconductivity, making them attractive for further research and applications.