diff --git a/docs/guides/sql-target.md b/docs/guides/sql-target.md
index d05e038be..c2af5c01f 100644
--- a/docs/guides/sql-target.md
+++ b/docs/guides/sql-target.md
@@ -30,7 +30,10 @@ def custom_array_to_sql(jsonschema: dict) -> VectorType | sa.types.VARCHAR:
 class MyConnector(SQLConnector):
     @functools.cached_property
     def jsonschema_to_sql(self):
-        to_sql = JSONSchemaToSQL()
+        to_sql = JSONSchemaToSQL.from_config(
+            self.config,
+            max_varchar_length=self.max_varchar_length,
+        )
         to_sql.register_type_handler("array", custom_array_to_sql)
         return to_sql
 ```
@@ -46,7 +49,10 @@ from my_sqlalchemy_dialect import URI
 class MyConnector(SQLConnector):
     @functools.cached_property
     def jsonschema_to_sql(self):
-        to_sql = JSONSchemaToSQL()
+        to_sql = JSONSchemaToSQL.from_config(
+            self.config,
+            max_varchar_length=self.max_varchar_length,
+        )
         to_sql.register_format_handler("uri", URI)
         return to_sql
 ```
diff --git a/singer_sdk/connectors/sql.py b/singer_sdk/connectors/sql.py
index 5e451ec9c..5e580f6fb 100644
--- a/singer_sdk/connectors/sql.py
+++ b/singer_sdk/connectors/sql.py
@@ -284,6 +284,35 @@ def __init__(self, *, max_varchar_length: int | None = None) -> None:
 
         self._fallback_type: type[sa.types.TypeEngine] = sa.types.VARCHAR
 
+    @classmethod
+    def from_config(
+        cls: type[JSONSchemaToSQL],
+        config: dict,  # noqa: ARG003
+        *,
+        max_varchar_length: int | None,
+    ) -> JSONSchemaToSQL:
+        """Create a new instance from a configuration dictionary.
+
+        Override this to instantiate this converter with values from the target's
+        configuration dictionary.
+
+        .. code-block:: python
+
+              class CustomJSONSchemaToSQL(JSONSchemaToSQL):
+                  @classmethod
+                  def from_config(cls, config, **kwargs):
+                      return cls(max_varchar_length=config.get("max_varchar_length"))
+
+        Args:
+            config: The configuration dictionary.
+            max_varchar_length: The absolute maximum length for VARCHAR columns that
+                the database supports.
+
+        Returns:
+            A new instance of the class.
+        """
+        return cls(max_varchar_length=max_varchar_length)
+
     def _invoke_handler(  # noqa: PLR6301
         self,
         handler: JSONtoSQLHandler,
@@ -524,6 +553,11 @@ class SQLConnector:  # noqa: PLR0904
     #: a custom mapping for your SQL dialect.
     sql_to_jsonschema_converter: type[SQLToJSONSchema] = SQLToJSONSchema
 
+    #: The JSON-to-SQL type mapper class for this SQL connector. Override this property
+    #: with a subclass of :class:`~singer_sdk.connectors.sql.JSONSchemaToSQL` to provide
+    #: a custom mapping for your SQL dialect.
+    jsonschema_to_sql_converter: type[JSONSchemaToSQL] = JSONSchemaToSQL
+
     def __init__(
         self,
         config: dict | None = None,
@@ -574,7 +608,10 @@ def jsonschema_to_sql(self) -> JSONSchemaToSQL:
 
         .. versionadded:: 0.42.0
         """
-        return JSONSchemaToSQL(max_varchar_length=self.max_varchar_length)
+        return self.jsonschema_to_sql_converter.from_config(
+            self.config,
+            max_varchar_length=self.max_varchar_length,
+        )
 
     @contextmanager
     def _connect(self) -> t.Iterator[sa.engine.Connection]: