diff --git a/.changeset/yellow-geckos-mix.md b/.changeset/yellow-geckos-mix.md
new file mode 100644
index 00000000..846a56a0
--- /dev/null
+++ b/.changeset/yellow-geckos-mix.md
@@ -0,0 +1,5 @@
+---
+"@core/electric": patch
+---
+
+Truncate temporary replication slot name to always fit within Postgres' limit of 63 chars
diff --git a/components/electric/lib/electric/replication/postgres/logical_replication_producer.ex b/components/electric/lib/electric/replication/postgres/logical_replication_producer.ex
index 4a26694b..ea0e361c 100644
--- a/components/electric/lib/electric/replication/postgres/logical_replication_producer.ex
+++ b/components/electric/lib/electric/replication/postgres/logical_replication_producer.ex
@@ -111,7 +111,8 @@ defmodule Electric.Replication.Postgres.LogicalReplicationProducer do
 
     publication = repl_opts.publication
     main_slot = repl_opts.slot
-    tmp_slot = main_slot <> "_rc"
+    # Ensure temporary slot name fits within Postgres' limit of 63 chars
+    tmp_slot = String.slice(main_slot, 0..59) <> "_rc"
 
     Logger.metadata(pg_producer: origin)