This study demonstrates the realization of a three-site Kitaev chain, a topological superconductor, using quantum dots (QDs) coupled through a superconductor. The Kitaev chain is a minimal model for realizing Majorana zero modes (MZMs), non-Abelian excitations with potential applications in quantum computing. The researchers show that extending the chain to three sites enhances the protection of MZMs against perturbations compared to a two-site configuration. This enhanced protection is evidenced by the stability of zero-energy modes, which remain robust against variations in both the coupling amplitudes and the electrochemical potential of the constituent QDs. The experimental observations are consistent with numerical simulations, providing strong evidence for the development of longer Kitaev chains, a crucial step towards achieving topological protection in QD-based systems. The study also highlights the importance of phase control in improving the coherence time of MZMs, which is estimated to be around 1 μs for a three-site Kitaev chain.This study demonstrates the realization of a three-site Kitaev chain, a topological superconductor, using quantum dots (QDs) coupled through a superconductor. The Kitaev chain is a minimal model for realizing Majorana zero modes (MZMs), non-Abelian excitations with potential applications in quantum computing. The researchers show that extending the chain to three sites enhances the protection of MZMs against perturbations compared to a two-site configuration. This enhanced protection is evidenced by the stability of zero-energy modes, which remain robust against variations in both the coupling amplitudes and the electrochemical potential of the constituent QDs. The experimental observations are consistent with numerical simulations, providing strong evidence for the development of longer Kitaev chains, a crucial step towards achieving topological protection in QD-based systems. The study also highlights the importance of phase control in improving the coherence time of MZMs, which is estimated to be around 1 μs for a three-site Kitaev chain.