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Wago
281-665/281-739Component terminal block; 4-conductor; for DIN-rail 35 x 15 and 35 x 7.5; 4 mm²; CAGE CLAMP®; gray
Wago 281-666
2-conductor disconnect/test terminal block; with touch-proof test sockets; for DIN-rail 35 x 15 and 35 x 7.5; 4 mm²; CAGE CLAMP®; 4,00 mm²; gray
- MPN
- 281-666
- Category
- Rail-Mount Terminal Blocks
Price and lead time confirmed within 1 business day
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- 12-month warranty (new) · 3-month (used/refurbished)
- 30-day returns, no restocking fee on unused parts
- Ships via
What is the Wago 281-666?
Disconnect terminal block for test and measurement, 281 Series, gray
This disconnect terminal block for test and measurement (item number 281-666) provides hassle-free electrical installations. Conductors can only be connected to this disconnect terminal block for test and measurement if their strip length is between 9 and 10 mm . Featuring conductor terminals along with CAGE CLAMP®, this product delivers reliable performance. Our highly-rated and maintenance-free CAGE CLAMP® connection makes it easy to connect all conductor types without having to prepare the conductor. For example, you don't need to crimp ferrules. This disconnect terminal block for test and measurement is suitable for conductor cross sections ranging from 0.08 mm² to 4 mm².
Specifications
Electrical data - Ratings per IEC/EN
| Nominal voltage (III/3) | 400 V |
| Rated impulse withstand voltage (III / 3) | 6 kV |
| Rated current | 10 A |
| Legend (ratings) | (III / 3) ≙ Overvoltage category III / Pollution degree 3 |
Electrical data - Power Loss
| Power loss, per pole (potential) | 0.1 W |
| Rated current I<sub>N</sub> for power loss specification | 10 A |
| Resistance value for specified, current-dependent power loss | 0.001 Ω |
Electrical data - General information
| Wiring direction | Front-entry wiring |
Connection data
| Clamping units | 2 |
| Total number of potentials | 2 |
| Number of levels | 1 |
Connection data - Connection 1
| Connection technology | CAGE CLAMP® |
| Actuation type | Operating tool |
| Connectable conductor materials | Copper, Aluminum |
| Connectable conductor materials (note) | Terminating Aluminum ConductorsWAGO Spring-Clamp Terminal Blocks are suitable for solid aluminum conductors up to 4 mm²/12 AWG if WAGO “Alu-Plus” Contact Paste 249-130 is used for 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, aluminum conductors must first be cleaned with a blade and then immediately inserted into the clamping units filled with “Alu-Plus” contact paste.It is also possible to apply WAGO “Alu-Plus” additionally on the whole surface of the aluminum conductor before termination.Please note that the nominal currents must be adapted to the reduced conductivity of the aluminum conductors:2.5 mm² = 16 A4 mm² = 22 A |
| 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 inches |
| Wiring direction | Front-entry wiring |
Physical data
| Width | 6 mm / 0.236 inches |
| Height | 86 mm / 3.386 inches |
| Depth from upper-edge of DIN-rail | 53.5 mm / 2.106 inches |
Mechanical data
| Design | horizontal type |
| Mounting type | DIN-35 rail |
| Marking level | Center marking |
Material data
| Note (material data) | Information on material specifications can be found here |
| Color | gray |
| Material group | I |
| Insulation material (main housing) | Polyamide (PA66) |
| Flammability class per UL94 | V0 |
| Fire load | 0.217 MJ |
| Weight | 14 g |
Environmental requirements
| Processing temperature | -35 … +85 °C |
| Continuous operating temperature | -60 … +105 °C |
Commercial data
| Product Group | 1 (Rail Mounted Terminal Blocks) |
| PU (SPU) | 50 pcs |
| Packaging type | box |
| Country of origin | DE |
| GTIN | 4044918838078 |
| Customs tariff number | 85365080000 |
Product Classification
| UNSPSC | 39121410 |
| eCl@ss 10.0 | 27-14-11-26 |
| eCl@ss 9.0 | 27-14-11-26 |
| ETIM 9.0 | EC000902 |
| ETIM 10.0 | EC000902 |
| ECCN | NO US CLASSIFICATION |
Environmental Product Compliance
| RoHS Compliance Status | Compliant,No Exemption |
281-666: frequently asked questions
When can 281-666 be shipped?
281-666 is sourced on request — request a quote and we'll confirm the exact availability and shipping timeline for this specific unit.
Can I pick up 281-666 in person?
Local pickup from our Groningen, Netherlands warehouse may be possible — contact us before ordering to check availability and arrange a collection time.
Is express delivery available?
Yes — mention it when you request a quote for 281-666 and we'll include express shipping options in our reply.
My factory is down and I need this urgently — can you help?
For a critical breakdown, contact us directly at +31 (0)50-7110348 or sales@partnerplc.com — we can look into same-day courier or dedicated taxi/hotshot delivery for 281-666, subject to availability and destination.
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Wago 281-666Price and lead time confirmed within 1 business day
Request a Quote