What panel thickness can be used?

Up to 7 mm. The mounting nut is included. The cut-out follows the M20 thread.

Do I need a different version for a plastic enclosure?

Yes. For non-conductive enclosures Techno offers the same versions as an NC variant, NC standing for non conductive. The standard version shown here is intended for conductive enclosures.

How do M16, M20 and M25 differ?

Only in panel size. Electrically all three are identical: 25 A at 630 V AC, 0.5 to 2.5 mm², IP66 and IP68.

Which pole counts are available?

2+PE and 3+PE. Techno counts the protective earth as a pole and therefore designates these versions as 3-pole and 4-pole.

TH389U M20

Series · 4 variants

Image similar

Series no.:: TH389U-M20Housing
Variants:: 4
Series:: TH389U(5 versions)

TH389U with M20 gland: panel-mounted plug and socket connectors, 25 A at 630 V, IP66 and IP68 — the middle of the three panel sizes.

Common properties

Connection type:Screw connections

Mounting diameter [mm]:20

Housing shape:Round

Housing material:Black plastic

Kabelquerschnitt max. mm²:2.5

Kabelquerschnitt min. mm²:0.5

Kontaktmaterial:Nickel

MaxStrom [A]:25

Montageart:Frontplattenmontage

Schutzart:IP66

Serie:TH389U

Spannung [V]:630

Zulassung:CE

Available options

These properties vary within the TH389U M20 series and can be configured.

Housing:Panel socket connector, Panel plug connector

Polzahl:2+PE, 3+PE

Steckverbindertyp:Buchse, Stecker

Example configurations

A selection of typical configurations from the TH389U M20 series. All 4 variants are listed in the table below.

THB.389.N3EU

TH389U M20 Gehäusesteckverbinder 2+PE polig

Housing:: Panel plug connector
Steckverbindertyp:: Stecker
Polzahl:: 2+PE

THB.389.N4EU

TH389U M20 Gehäusesteckverbinder 3+PE polig

Housing:: Panel plug connector
Steckverbindertyp:: Stecker
Polzahl:: 3+PE

THB.389.P3EU

TH389U M20 Gehäusekupplung 2+PE polig

Housing:: Panel socket connector
Steckverbindertyp:: Buchse
Polzahl:: 2+PE

THB.389.P4EU

TH389U M20 Gehäusekupplung 3+PE polig

Housing:: Panel socket connector
Steckverbindertyp:: Buchse
Polzahl:: 3+PE

All variants in the series (4)

Name	Item no.	Housing	Polzahl	Steckverbindertyp
TH389U M20 Gehäusesteckverbinder 2+PE polig Panel plug connector Stecker 2+PE	THB.389.N3EU	Panel plug connector	2+PE	Stecker
TH389U M20 Gehäusesteckverbinder 3+PE polig Panel plug connector Stecker 3+PE	THB.389.N4EU	Panel plug connector	3+PE	Stecker
TH389U M20 Gehäusekupplung 2+PE polig Panel socket connector Buchse 2+PE	THB.389.P3EU	Panel socket connector	2+PE	Buchse
TH389U M20 Gehäusekupplung 3+PE polig Panel socket connector Buchse 3+PE	THB.389.P4EU	Panel socket connector	3+PE	Buchse

Matching counterpart

TH389U

TH389U-Cable

Cable plug mates with panel socket, cable socket with panel plug — matching pole count.

6 variants

Description

The panel-mounted versions of the TH389U series with M20 gland sit in the enclosure wall and accept the matching cable connector from outside. They are rated for 25 A at 630 V AC, with conductor cross-sections from 0.5 to 2.5 mm² — stranded or solid.

Versions

Available as panel plug connector and panel socket connector, each with 2+PE and 3+PE poles. Supplied with a mounting nut; maximum panel thickness is 7 mm. Connection is by screw terminal at 0.8 Nm; strip 6 mm of conductor and 25 mm of sheath.

M20 is the most widely used of the three panel sizes and fits the cut-out many enclosures already provide. Electrically, M16, M20 and M25 are identical.

Metal or plastic enclosure?

This version is intended for installation in conductive enclosures. For plastic enclosures, Techno offers the same versions as an NC variant — short for non conductive. Check which enclosure material you are using before ordering.

Protection and materials

Protection rating is IP66 and IP68, impact resistance IK08. The housing is glass-fibre reinforced PA66 to UL94 V0, the gland PA66 to UL94 V2, the contacts brass. The temperature range runs from −40 to +125 °C with a maximum operating temperature of +70 °C. Tested to EN 61535, with CE and UKCA marking. The seals are silicone.

You will find the matching counterpart among the cable-mounted versions of the series. We assemble other configurations to order. Get in touch.