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2051-23-SM-RPLF

2051-23-SM-RPLF

Bourns Inc.
Gas Discharge Tube 230 V 2000A (2kA) ±25% 2 Pole Surface Mount
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Overview

The Bourns 2051-23-SM-RPLF is a compact, 2-pole Gas Discharge Tube (GDT) designed for high-energy surge protection in sensitive electronics. It features a nominal DC spark-over voltage of 230V and can handle impulse discharge currents up to 2000A (2kA) in a standard 1812 surface-mount package. Its low capacitance makes it suitable for high-speed data lines where signal integrity is critical.

Why Choose This Part

This GDT offers excellent performance stability over its service life and maintains high insulation resistance to minimize leakage current. The surface-mount 1812 footprint allows for automated pick-and-place assembly while providing a high 2kA surge rating. Its low capacitance profile ensures it does not interfere with bandwidth-sensitive applications up to the MHz range.

Applications

Telecom CPE
Protects customer premises equipment like modems and routers from overvoltage transients on phone lines.
Data Communication Lines
Used in high-speed Ethernet or RS-485 interfaces where low capacitance (less than 1pF) is required to prevent signal attenuation.
Industrial Automation
Provides primary protection for sensor interfaces and fieldbus systems against lightning strikes or industrial switching surges.
PCI Modems
Integrated into internal expansion cards to safeguard internal computer buses from external line surges.

Key Specifications

Tolerance +/-25%
Fail Short No
Mounting Type Surface Mount
Package / Case 1812 (4532 Metric)
Number of Poles 2
Voltage - DC Spark Over (Nom) 230 V
Impulse Discharge Current (8/20us) 2000A (2kA)

Getting Started

When integrating this GDT, ensure the PCB traces are wide enough to handle the 2kA impulse current without failing. Place the device as close as possible to the entry point of the surge, typically before any semiconductor-based ESD protection like TVS diodes to allow for coordinated overvoltage protection. Follow standard reflow soldering profiles for 1812 SMD components as per the Bourns datasheet.