2838322

What does this surge protection plug do?

This device is a plug-in surge protection module designed to protect four conductors in signal circuits that are grounded on one side. It helps limit transient overvoltages between line-line and line-ground/shield paths in 24 V DC applications.

What types of applications is it suitable for?

It is intended for low-voltage signal circuit protection where four conductors share a common reference potential. Typical uses include industrial control, instrumentation and interface wiring where sensitive signal lines need protection from surge events.

What is the nominal operating voltage?

The nominal voltage is 24 V DC. The maximum continuous voltage is 28 V DC or 20 V AC.

How many conductors can it protect?

It is designed to protect four conductors within a signal circuit arrangement that uses a common reference potential.

Does it need a separate base element?

Yes. This is a plug-in protection element and it is installed together with a compatible base element. Suitable matching base elements include PT 4X1-BE and PT 4X1+F-BE.

How is it mounted?

The plug is used on a matching base element, and the complete assembly is intended for DIN rail mounting. Compatible base elements are designed for NS 35/7.5 and NS 35/15 rail profiles.

What is the rated current?

The rated current is 300 mA at 45°C.

What surge performance does it offer?

Key surge figures include a nominal discharge current of 10 kA (8/20 µs) line-earth, a maximum discharge current of 10 kA (8/20 µs) line-earth, a total discharge current of 20 kA (8/20 µs), and a pulse discharge current of 2.5 kA (10/350 µs) per path.

How fast does it respond to a surge event?

The response time is up to 1 ns for the core-earth or line-earth path, helping the module react quickly to transient events.

What is the voltage protection level?

The voltage protection level is up to 80 V on the line-earth path under C2 test conditions. Output voltage limitation is up to 45 V for spike conditions and up to 40 V for static conditions.

What conductor sizes can be used with the connected base element?

With the appropriate base element, it supports flexible conductors from 0.2 mm² to 2.5 mm², solid conductors from 0.2 mm² to 4 mm², and AWG 24 to 12. The stripping length is 8 mm and the screw thread is M3 with a tightening torque of 0.8 Nm.

What are the physical dimensions of the plug?

The plug itself measures 45 mm high, 17.7 mm wide and 52 mm deep. In documentation showing the complete assembled module with base element, the overall size is listed as 90 mm high, 17.7 mm wide and 65.5 mm deep.

What environmental conditions can it operate in?

It has an operating temperature range of -40°C to 85°C and an IP20 degree of protection.

What is the housing material and finish?

The housing is made from PA 6.6 with a UL 94 V-0 flammability rating. The unit is supplied in black, with later catalogue data specifying jet black RAL 9005.

What standards and approvals are listed for this device?

This surge protection plug is specified in line with IEC 61643-21, DIN EN 61643-21 and UL 497B. Listed approvals in the available product data include UL Listed, DNV GL and EAC, with additional Ex-related listings shown in catalogue information.

Can the protection plug be tested after installation?

Yes. The product literature states that the plug can be checked with suitable CHECKMASTER testing equipment, which can be useful during inspection and maintenance procedures.

Are accessories available for marking and shielding?

Yes. Catalogue information for 2838322 lists marker strips for identification as well as shield connection accessories such as SSA 3-6 and SSA 5-10, allowing the installation to be labelled and integrated neatly within the panel.