GU-220 Signal Twisted-Pair Surge Protective Device, 220V Uc, 18mm DIN Rail

Description

The GU-220 is a signal twisted-pair surge protective device intended for surge protection of analog and digital signal communication lines. It is installed directly at the front end of the equipment or system being protected, as close as possible to that equipment, and is connected in series with the protected line.

Product Overview

The GU-220 protects signal communication circuits against surge events. Its nominal working voltage Un is 110V and its maximum continuous operating voltage Uc is 220V. The device carries a nominal discharge current In of 5kA and a maximum discharge current Imax of 10kA, with a voltage protection level Up of ≤500V and a response time tA of 1ns.

The device is rated for a load current IL of 500mA and has an insertion loss of ≤0.5dB at 30MHz. It is housed in a 90mm × 62mm × 18mm body with a UL94-V0 flame rating and an IP20 enclosure protection rating, and it mounts on a 35mm DIN rail.

Key Features

• Designed for surge protection of analog and digital signal communication lines
• Nominal working voltage Un: 110V; maximum continuous operating voltage Uc: 220V
• Nominal discharge current In: 5kA; maximum discharge current Imax: 10kA
• Voltage protection level Up: ≤500V; response time tA: 1ns
• Rated load current IL: 500mA; insertion loss ≤0.5dB at 30MHz
• 35mm DIN rail mounting with screw terminal connections
• Conductor connection capacity up to 2.5mm²
• Enclosure material flame rating UL94-V0; enclosure protection rating IP20
• Operating temperature range -40℃ to +80℃, relative humidity ≤95%
• Maximum altitude ≤3000m

Technical Specifications

Parameter	Value
Model	GU-220
Nominal working voltage Un	110V
Maximum continuous operating voltage Uc	220V
Nominal discharge current In	5kA
Maximum discharge current Imax	10kA
Voltage protection level Up	≤500V
Response time tA	1ns
Rated load current IL	500mA
Insertion loss	≤0.5dB/30MHz
Mounting method	35mm DIN rail
Conductor connection capacity	≤2.5mm²
Interface type	Screw terminals
Enclosure material flame rating	UL94-V0
Enclosure protection rating	IP20
Temperature and humidity range	-40℃ to +80℃, relative humidity ≤95%
Altitude	≤3000m
Body dimensions	90mm × 62mm × 18mm

Applications

The GU-220 is suitable for surge protection of analog and digital signal communication lines. It is installed at the front end of the equipment or system being protected, connected in series with the signal line.

Installation and Use

• Install the GU-220 directly at the front end of the equipment or system being protected, as close as possible to that equipment.
• The device can be connected in series as shown in the wiring diagram. For better protection performance, keep the grounding conductor as short as possible, with a total length controlled within 0.5m.
• Use 1–2.5mm² multi-core copper conductors for the connecting wires.
• The “IN” lead is the incoming line end and the “OUT” lead connects to the equipment or system being protected. The two line sections must be routed separately and must not be bundled together, to prevent secondary induction.
• When installed within the specified conditions, the device does not require long-term maintenance; only routine system maintenance is needed. If a signal transmission problem occurs and normal transmission resumes after the surge protective device is replaced, the device has been damaged and must be repaired or replaced.

Frequently Asked Questions

What is the maximum continuous operating voltage of the GU-220?

The maximum continuous operating voltage Uc is 220V, and the nominal working voltage Un is 110V.

How is the GU-220 installed?

It mounts on a 35mm DIN rail and is connected in series at the front end of the protected equipment using screw terminals, with conductors of 1–2.5mm².

What is the response time of the GU-220?

The response time tA is 1ns.

What conductor size can be connected to the GU-220?

The conductor connection capacity is ≤2.5mm², and 1–2.5mm² multi-core copper conductors are recommended for the connecting wires.