Wago 281-531 Data Sheet

Data sheet | Item number:281-531

Quadruple-deck rail-mounted terminal block; Rail-mounted terminal block
for electric motor wiring; L1 - L2; for DIN-rail 35 x 15 and 35 x 7.5; 4 mm²;
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.

281-531

02.05.2019Page /1 9

Data sheet | Item number:281-531

“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

Electrical data

Ratings per IEC/EN 60664-1

Rated voltage (III / 3) 400 V

Rated impulse voltage (III / 3) 6 kV

Rated current 20 A

Rated current (2) 25A

Connection data

Connection technology

CAGE CLAMP

®

Actuation type Operating tool

Connectable conductor materials Copper

Aluminum

Nominal cross section 2.5mm²

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

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

Strip length 8 … 9mm/ 0.31 … 0.35inch

Total number of connection points 4

Total number of potentials 2

Number of levels 4

Type of wiring Front-entry wiring

Geometrical Data

Width 6mm/ 0.236inch

281-531

02.05.2019Page /2 9

Data sheet | Item number:281-531

Height from upper-edge of DIN-35 rail 62.5mm/ 2.461inch

Depth 100mm/ 3.937inch

Mechanical data

Design angled

Type of mounting DIN-35 rail

Potential marking L1 - L2

Marking level Center/side marking

Material Data

Color gray

Insulating material Polyamide 66 (PA 66)

Fire load 0.38 MJ

Weight 17.002g

Commercial data

Product Group 1 (Rail Mounted Terminal Blocks)

Country of origin DE

GTIN 4044918501545

Customs Tariff No. 85369010000

Approvals / Certificates

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

281-531

02.05.2019Page /3 9