Wago 281-637 Data Sheet

Data sheet | Item number:281-637

3-conductor ground terminal block; 4 mm²; center marking; for DIN-rail 35 x
15 and 35 x 7.5; CAGE CLAMP®

Color:

Item description

Note:
Terminating Aluminum Conductors

WAGO spring clamp terminal blocks are suitable for solid aluminum conductors up to 4mm²/12AWG if WAGO “Alu-Plus” Contact Paste is used for

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Data sheet | Item number:281-637

termination.

“Alu-Plus” Contact Paste Advantages:

Automatically destroys the oxide film during clamping.

Prevents fresh oxidation at the clamping point.

Prevents electrolytic corrosion between aluminum and copper conductors (in the same terminal block).

Provides long-term protection against corrosion.

Using terminal blocks with CAGE CLAMP® Spring Pressure Connection Technology, and aluminum conductors must first be cleaned with a blade
then immediately be inserted into the clamping units filled with “Alu-Plus” Contact Paste.

It is also possible to apply WAGO “Alu-Plus” on the whole surface of the aluminum conductor before termination.additionally

Please note that the nominal currents must be adapted to the reduced conductivity of the aluminum conductors:

2.5mm² (14 AWG) = 16 A
4mm² (12 AWG) = 22 A

Data

Connection data

Connection technology

CAGE CLAMP

®

Actuation type Operating tool

Connectable conductor materials Copper

Aluminum

Solid conductor 0.08 … 4mm²/ 28 … 12AWG

Fine-stranded conductor 0.08 … 4mm²/ 28 … 12AWG

Strip length 9 … 10mm/ 0.35 … 0.39inch

Total number of connection points 3

Total number of potentials 1

Number of levels 1

Type of wiring Front-entry wiring

Geometrical Data

Width 6mm/ 0.236inch

Height from upper-edge of DIN-35 rail 37mm/ 1.457inch

Depth 61.5mm/ 2.421inch

Mechanical data

Design angled

Type of mounting DIN-35 rail

Marking level Center marking

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Data sheet | Item number:281-637

Material Data

Color green-yellow

Insulating material Polyamide 66 (PA 66)

Fire load 0.182 MJ

Weight 16.106g

Commercial data

Country of origin DE

GTIN 4045454084516

Customs Tariff No. 85369010000

Approvals / Certificates

Country specific Approvals

Logo Approval Additional Approval Text

Certificate
name

CCA

DEKRA Certification B.V.

IEC 60947 NTR NL-

7454/A1

CCA

DEKRA Certification B.V.

EN 60947 NTR NL-

7454/A1

CSA

DEKRA Certification B.V.

C22.2 No. 158 1505034

KEMA/KEUR

DEKRA Certification B.V.

EN 60947 71-

107288

Ship Approvals

Logo Approval Additional Approval Text

Certificate
name

ABS

American Bureau of Shipping

- 14­HG1293677­PDA

BV

Bureau Veritas S.A.

EN 60947 07436/E0 BV

DNV GL

Det Norske Veritas, Germanischer Lloyd

- TAE00001V2

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