# (c) 2026 NetBox Labs, Inc.
# Licensed under the NetBox Limited Use License v1.0
# https://netboxlabs.com/ndx/license
# Community DTL portions licensed under Apache 2.0:
# https://github.com/netbox-community/devicetype-library
---
manufacturer: Schweitzer Engineering Laboratories
model: SEL-851
slug: schweitzer-engineering-laboratories-sel-851
part_number: SEL-851
u_height: 2
is_full_depth: false
weight: 5.8
weight_unit: kg
comments: 1 ms arc-flash trip; universal PSU 24-250 Vdc / 110-240 Vac; dual Ethernet;
  IEC 61850; 2U rack-mount; -40 to +85C
interfaces:
- name: Ethernet 1
  type: 100base-tx
- name: Ethernet 2
  type: 100base-tx
- name: Ethernet 3
  type: 1000base-x-sfp
  label: GbE SFP (optional)
- name: Serial 1
  type: other
  label: EIA-232/485
- name: Serial 2
  type: other
  label: EIA-232/485
- name: Serial 3
  type: other
  label: EIA-232/485
- name: IRIG-B
  type: other
  label: IRIG-B time sync input (BNC)
console-ports:
- name: Console
  type: de-9
  label: EIA-232 Console
- name: USB Console
  type: usb-b
power-ports:
- name: Power
  type: dc-terminal
  maximum_draw: 30
  description: 24-250 Vdc or 110-240 Vac (universal)
description: Feeder Protection Relay - next generation
