diff --git a/power_grid_model_c/power_grid_model/include/power_grid_model/auxiliary/input.hpp b/power_grid_model_c/power_grid_model/include/power_grid_model/auxiliary/input.hpp
index 4077b4e02..b0cac9511 100644
--- a/power_grid_model_c/power_grid_model/include/power_grid_model/auxiliary/input.hpp
+++ b/power_grid_model_c/power_grid_model/include/power_grid_model/auxiliary/input.hpp
@@ -98,6 +98,27 @@ struct LineInput {
     operator BranchInput const&() const { return reinterpret_cast<BranchInput const&>(*this); }
 };
 
+struct AsymLineInput {
+    ID id{na_IntID};  // ID of the object
+    ID from_node{na_IntID};  // node IDs to which this branch is connected at both sides
+    ID to_node{na_IntID};  // node IDs to which this branch is connected at both sides
+    IntS from_status{na_IntS};  // whether the branch is connected at each side
+    IntS to_status{na_IntS};  // whether the branch is connected at each side
+    double c1{nan};  // positive sequence parameters
+    std::array<std::array<double, 3>, 3> r_matrix{static_cast<std::array<std::array<double, 3>, 3>>(na_IntS)};  // 3 x 3 matrix
+    std::array<std::array<double, 3>, 3> x_matrix{static_cast<std::array<std::array<double, 3>, 3>>(na_IntS)};  // 3 x 3 matrix
+    double c0{nan};  // zero sequence parameters
+    double i_n{nan};  // rated current
+
+    // implicit conversions to BaseInput
+    operator BaseInput&() { return reinterpret_cast<BaseInput&>(*this); }
+    operator BaseInput const&() const { return reinterpret_cast<BaseInput const&>(*this); }
+
+    // implicit conversions to BranchInput
+    operator BranchInput&() { return reinterpret_cast<BranchInput&>(*this); }
+    operator BranchInput const&() const { return reinterpret_cast<BranchInput const&>(*this); }
+};
+
 struct LinkInput {
     ID id{na_IntID};  // ID of the object
     ID from_node{na_IntID};  // node IDs to which this branch is connected at both sides
diff --git a/power_grid_model_c/power_grid_model/include/power_grid_model/auxiliary/meta_gen/input.hpp b/power_grid_model_c/power_grid_model/include/power_grid_model/auxiliary/meta_gen/input.hpp
index dfc3f2f31..cebe90eb1 100644
--- a/power_grid_model_c/power_grid_model/include/power_grid_model/auxiliary/meta_gen/input.hpp
+++ b/power_grid_model_c/power_grid_model/include/power_grid_model/auxiliary/meta_gen/input.hpp
@@ -111,6 +111,24 @@ struct get_attributes_list<LineInput> {
     };
 };
 
+template<>
+struct get_attributes_list<AsymLineInput> {
+    static constexpr std::array<MetaAttribute, 10> value{
+            // all attributes including base class
+            
+            meta_data_gen::get_meta_attribute<&AsymLineInput::id>(offsetof(AsymLineInput, id), "id"),
+            meta_data_gen::get_meta_attribute<&AsymLineInput::from_node>(offsetof(AsymLineInput, from_node), "from_node"),
+            meta_data_gen::get_meta_attribute<&AsymLineInput::to_node>(offsetof(AsymLineInput, to_node), "to_node"),
+            meta_data_gen::get_meta_attribute<&AsymLineInput::from_status>(offsetof(AsymLineInput, from_status), "from_status"),
+            meta_data_gen::get_meta_attribute<&AsymLineInput::to_status>(offsetof(AsymLineInput, to_status), "to_status"),
+            meta_data_gen::get_meta_attribute<&AsymLineInput::c1>(offsetof(AsymLineInput, c1), "c1"),
+            meta_data_gen::get_meta_attribute<&AsymLineInput::r_matrix>(offsetof(AsymLineInput, r_matrix), "r_matrix"),
+            meta_data_gen::get_meta_attribute<&AsymLineInput::x_matrix>(offsetof(AsymLineInput, x_matrix), "x_matrix"),
+            meta_data_gen::get_meta_attribute<&AsymLineInput::c0>(offsetof(AsymLineInput, c0), "c0"),
+            meta_data_gen::get_meta_attribute<&AsymLineInput::i_n>(offsetof(AsymLineInput, i_n), "i_n"),
+    };
+};
+
 template<>
 struct get_attributes_list<LinkInput> {
     static constexpr std::array<MetaAttribute, 5> value{
diff --git a/power_grid_model_c/power_grid_model/include/power_grid_model/auxiliary/static_asserts/input.hpp b/power_grid_model_c/power_grid_model/include/power_grid_model/auxiliary/static_asserts/input.hpp
index e8a7c8354..04cd6c674 100644
--- a/power_grid_model_c/power_grid_model/include/power_grid_model/auxiliary/static_asserts/input.hpp
+++ b/power_grid_model_c/power_grid_model/include/power_grid_model/auxiliary/static_asserts/input.hpp
@@ -70,6 +70,25 @@ static_assert(offsetof(LineInput, to_node) == offsetof(BranchInput, to_node));
 static_assert(offsetof(LineInput, from_status) == offsetof(BranchInput, from_status));
 static_assert(offsetof(LineInput, to_status) == offsetof(BranchInput, to_status));
 
+// static asserts for AsymLineInput
+static_assert(std::is_standard_layout_v<AsymLineInput>);
+// static asserts for conversion of AsymLineInput to BaseInput
+static_assert(std::alignment_of_v<AsymLineInput> >= std::alignment_of_v<BranchInput>);
+static_assert(std::same_as<decltype(AsymLineInput::id), decltype(BaseInput::id)>);
+static_assert(offsetof(AsymLineInput, id) == offsetof(BaseInput, id));
+// static asserts for conversion of AsymLineInput to BranchInput
+static_assert(std::alignment_of_v<AsymLineInput> >= std::alignment_of_v<BranchInput>);
+static_assert(std::same_as<decltype(AsymLineInput::id), decltype(BranchInput::id)>);
+static_assert(std::same_as<decltype(AsymLineInput::from_node), decltype(BranchInput::from_node)>);
+static_assert(std::same_as<decltype(AsymLineInput::to_node), decltype(BranchInput::to_node)>);
+static_assert(std::same_as<decltype(AsymLineInput::from_status), decltype(BranchInput::from_status)>);
+static_assert(std::same_as<decltype(AsymLineInput::to_status), decltype(BranchInput::to_status)>);
+static_assert(offsetof(AsymLineInput, id) == offsetof(BranchInput, id));
+static_assert(offsetof(AsymLineInput, from_node) == offsetof(BranchInput, from_node));
+static_assert(offsetof(AsymLineInput, to_node) == offsetof(BranchInput, to_node));
+static_assert(offsetof(AsymLineInput, from_status) == offsetof(BranchInput, from_status));
+static_assert(offsetof(AsymLineInput, to_status) == offsetof(BranchInput, to_status));
+
 // static asserts for LinkInput
 static_assert(std::is_standard_layout_v<LinkInput>);
 // static asserts for conversion of LinkInput to BaseInput