diff --git a/initializers/device_types.yml b/initializers/device_types.yml
index 88798b5..ffb45fe 100644
--- a/initializers/device_types.yml
+++ b/initializers/device_types.yml
@@ -21,3 +21,36 @@
 #   slug: other
 #   custom_field_data:
 #     text_field: Description
+#   interfaces:
+#     - name: eth0
+#       type: 1000base-t
+#       mgmt_only: True
+#     - name: eth1
+#       type: 1000base-t
+#   console_server_ports:
+#     - name_template: ttyS[1-48]
+#       type: rj-45
+#   power_ports:
+#     - name: psu0  # both non-template and template field specified; non-template field takes precedence
+#       name_template: psu[0,1]
+#       type: iec-60320-c14
+#       maximum_draw: 35
+#       allocated_draw: 35
+#   front_ports:
+#     - name_template: front[1,2]
+#       type: 8p8c
+#       rear_port_template: rear[0,1]
+#       rear_port_position_template: "[1,2]"
+#   rear_ports:
+#     - name_template: rear[0,1]
+#       type: 8p8c
+#       positions_template: "[3,2]"
+#   device_bays:
+#     - name_template: bay[0-9]
+#       label_template: test[0-5,9,6-8]
+#       description: Test description
+#   power_outlets:
+#     - name_template: outlet[0,1]
+#       type: iec-60320-c5
+#       power_port: psu0
+#       feed_leg: B
diff --git a/startup_scripts/190_device_types.py b/startup_scripts/190_device_types.py
index 98d7f5b..d154805 100644
--- a/startup_scripts/190_device_types.py
+++ b/startup_scripts/190_device_types.py
@@ -1,6 +1,17 @@
 import sys
+from typing import List
 
 from dcim.models import DeviceType, Manufacturer, Region
+from dcim.models.device_component_templates import (
+    ConsolePortTemplate,
+    ConsoleServerPortTemplate,
+    DeviceBayTemplate,
+    FrontPortTemplate,
+    InterfaceTemplate,
+    PowerOutletTemplate,
+    PowerPortTemplate,
+    RearPortTemplate,
+)
 from startup_script_utils import (
     load_yaml,
     pop_custom_fields,
@@ -8,6 +19,53 @@ from startup_script_utils import (
     split_params,
 )
 from tenancy.models import Tenant
+from utilities.forms.utils import expand_alphanumeric_pattern
+
+
+def expand_templates(params: List[dict], device_type: DeviceType) -> List[dict]:
+    templateable_fields = ["name", "label", "positions", "rear_port", "rear_port_position"]
+
+    expanded = []
+    for param in params:
+        param["device_type"] = device_type
+        expanded_fields = {}
+        has_plain_fields = False
+
+        for field in templateable_fields:
+            template_value = param.pop(f"{field}_template", None)
+
+            if field in param:
+                has_plain_fields = True
+                expanded.append(param)
+            elif template_value:
+                expanded_fields[field] = list(expand_alphanumeric_pattern(template_value))
+
+        if expanded_fields and has_plain_fields:
+            raise ValueError(f"Mix of plain and template keys provided for {templateable_fields}")
+
+        if not expanded_fields:
+            continue
+
+        elements = list(expanded_fields.values())
+        master_len = len(elements[0])
+        if not all([len(elem) == master_len for elem in elements]):
+            raise ValueError(
+                f"Number of elements in template fields "
+                f"{list(expanded_fields.keys())} must be equal"
+            )
+
+        for idx in range(master_len):
+            tmp = param.copy()
+            for field, value in expanded_fields.items():
+                if field in nested_assocs:
+                    model, match_key = nested_assocs[field]
+                    query = {match_key: value[idx], "device_type": device_type}
+                    tmp[field] = model.objects.get(**query)
+                else:
+                    tmp[field] = value[idx]
+            expanded.append(tmp)
+    return expanded
+
 
 device_types = load_yaml("/opt/netbox/initializers/device_types.yml")
 
@@ -17,9 +75,22 @@ if device_types is None:
 match_params = ["manufacturer", "model", "slug"]
 required_assocs = {"manufacturer": (Manufacturer, "name")}
 optional_assocs = {"region": (Region, "name"), "tenant": (Tenant, "name")}
+nested_assocs = {"rear_port": (RearPortTemplate, "name"), "power_port": (PowerPortTemplate, "name")}
+
+supported_components = {
+    "interfaces": (InterfaceTemplate, ["name"]),
+    "console_ports": (ConsolePortTemplate, ["name"]),
+    "console_server_ports": (ConsoleServerPortTemplate, ["name"]),
+    "power_ports": (PowerPortTemplate, ["name"]),
+    "power_outlets": (PowerOutletTemplate, ["name"]),
+    "rear_ports": (RearPortTemplate, ["name"]),
+    "front_ports": (FrontPortTemplate, ["name"]),
+    "device_bays": (DeviceBayTemplate, ["name"]),
+}
 
 for params in device_types:
     custom_field_data = pop_custom_fields(params)
+    components = [(v[0], v[1], params.pop(k, [])) for k, v in supported_components.items()]
 
     for assoc, details in required_assocs.items():
         model, field = details
@@ -41,3 +112,29 @@ for params in device_types:
         print("🔡 Created device type", device_type.manufacturer, device_type.model)
 
     set_custom_fields_values(device_type, custom_field_data)
+
+    for component in components:
+        c_model, c_match_params, c_params = component
+        c_match_params.append("device_type")
+
+        if not c_params:
+            continue
+
+        expanded_c_params = expand_templates(c_params, device_type)
+
+        for n_assoc, n_details in nested_assocs.items():
+            n_model, n_field = n_details
+            for c_param in expanded_c_params:
+                if n_assoc in c_param:
+                    n_query = {n_field: c_param[n_assoc], "device_type": device_type}
+                    c_param[n_assoc] = n_model.objects.get(**n_query)
+
+        for new_param in expanded_c_params:
+            new_matching_params, new_defaults = split_params(new_param, c_match_params)
+            new_obj, new_obj_created = c_model.objects.get_or_create(
+                **new_matching_params, defaults=new_defaults
+            )
+            if new_obj_created:
+                print(
+                    f"🧷  Created {c_model._meta} {new_obj} component for device type {device_type}"
+                )