Wago 281-993 Data Sheet

Data sheet | Item number:281-993

3-conductor through terminal block; 4 mm²; suitable for Ex e II applications;
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
termination.

“Alu-Plus” Contact Paste Advantages:

Automatically destroys the oxide film during clamping.

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Data sheet | Item number:281-993

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

Electrical data

Rated voltage EN (Ex e II) 550 V

Ratings per IEC/EN 60664-1

Rated current 30 A

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 29mm/ 1.142inch

Depth 73.5mm/ 2.894inch

Mechanical data

Design horizontal

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Data sheet | Item number:281-993

Type of mounting DIN-35 rail

Marking level Center marking

Material Data

Color light gray

Insulating material Polyamide 66 (PA 66)

Fire load 0.176 MJ

Weight 10.928g

Commercial data

Product Group 1 (Rail Mounted Terminal Blocks)

Country of origin DE

GTIN 4045454698195

Customs Tariff No. 85369010000

Approvals / Certificates

Ex-Approvals

Logo Approval Additional Approval Text

Certificate
name

ATEx

Physikalisch Technische Bundesanstalt (PTB)

- PTB 00
ATEX
3110 U (II
2 G EEx e
II)

Country specific Approvals

Logo Approval Additional Approval Text

Certificate
name

CCA

DEKRA Certification B.V.

EN 60947 NTR NL-

7454/A1

CCA

DEKRA Certification B.V.

IEC 60947 NTR NL-

7454/A1

CSA

DEKRA Certification B.V.

C22.2 No. 158 1505034

CSA

DEKRA Certification B.V.

UL 1059 1505034

KEMA/KEUR

DEKRA Certification B.V.

EN 60947 71-

107288

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