TP232 RS-232 Serial Surge Protection

As of: Wednesday, September 9, 2026

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Standard Features

Two metal mounting brackets
Three stages of protection: Gas discharge tube, series resistor and transient voltage suppressor (TVS)
Two terminal posts for ground
RS-232 high-energy surge protector
Terminal blocks for transmit, receive, request to send, clear to send and signal ground
Safe for use with computers and PLCs
Also works with RS-485, RS-422 and 20 mA

Applications

Indicators, remote displays, printers, computers and PLCs

Approvals

WARNING: Cancer and Reproductive Harm California Proposition 65

The TP232 RS-232 high energy surge protector is safe to use with computers and PLCs. This device offers three stages of protection using different technologies for optimal surge protection.

TP232 RS-232 Specifications

Clamping Voltage (Stage One):
72 V DC minimum, 108 V DC maximum

Series Resistance (Stage Two):
2.7 ohm

Clamping Voltage (Stage Three):
14.3 V minimum, 15.7 V maximum

Clamping Time:
<5 × 10⁹ seconds

Temperature:
Operating:
0 to 122 °F (-18 to 50 °C)

Connectors:
Five-position terminal blocks

Dimensions:
(L × W × H)
Approximately 4.5 × 3.3 × 1.8 in

Warranty:
One-year limited

Approvals:
CE Listed

Parts

Part #	Description

69201	RS232 Protection,TP232 3-Stage Transient Serial Protection - Gas Discharge, Series Resistor, and TVS

Options

Part #	Description

17778	Ground Strap,12in Tinned Copper Braid
17781	Ground Strap,24in Tinned Copper Braid
69516	LIT,Manual TP232 Installation Guide