The electronic transport properties of a highly hydrogen-substituted 1111-type SmFeAsO epitaxial film with high critical-temperature $(T_{\mathrm{c}}=45\mathrm{K})$ were investigated under high magnetic fields. By using a single-turn magnet generating up to 130 T, we clarified that the upper critical field $\left({\mu }_0{H}_{\mathrm{c}2}\right)$ of $\mathrm{SmFeAs}{\mathrm{O}}_{0.65}{\mathrm{H}}_{0.35}$ is 120 T at the nearly low-temperature limit of 2.2 K for ${\mu }_{0}H\parallel ab$. The angular dependence of ${\mu }_0{H}_{\mathrm{c}2}$ revealed that the anisotropic parameter $\left(\gamma \right)$ around $T_{\mathrm{c}}$ is $\sim 2$, which is comparable with that of a practical candidate 122-type $\mathrm{Ba}{\mathrm{Fe}}_2{\mathrm{As}}_2$ with lower $T_{\mathrm{c}}$ and much smaller than that of F-substituted SmFeAsO. The small $\gamma$ mainly originates from the high hydrogen incorporation. The extremely high ${\mu }_0{H}_{\mathrm{c}2}$ and small $\gamma$, together with the high $T_{\mathrm{c}}$ and high critical current density, suggest that $\mathrm{SmFeAs}{\mathrm{O}}_{1-x}{\mathrm{H}}_x$ has high potential for the superconducting electromagnets and cables.

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• Electrical conductivity
• High magnetic fields
• Impurities in superconductors
• Multiband superconductivity
• Superconducting phase transition
• Superconductivity