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Red 3M 557 displacement connectors in clear polycarbonate box, pack of 100

3M

3M 557 Displacement Connector Red 22-16AWG PK100

SKU CH-XVXY-AF232

Insulation-displacement connector joins 22-16 AWG wires without stripping, rated 1,000 V and 221 °F, pack of 100

  • Length3.400
  • MaterialNo Fill
  • TypeDry Environment
  • Red colour for quick identification
  • Insulation-displacement design speeds up wire termination
  • Accepts 22 to 16 AWG solid or stranded conductors
  • Rated for 1000 V and 221 °F operating temperature
  • Pack of 100 connectors for volume jobs

3M 557 Displacement Connector Red

The 3M 557 is an insulation displacement connector coloured red for quick visual identification. It accepts solid or stranded wires from 22 to 16 AWG on both the run and tap positions. The double U-element design pierces insulation without stripping, making it suited for automotive and industrial wiring tasks where speed and reliability matter. Supplied in a pack of one hundred pieces.

Capacity and headroom

Each connector handles a maximum voltage of one thousand volts and operates up to two hundred and twenty-one degrees Fahrenheit. The maximum insulation diameter for both run and tap wires is zero point one two inches. It comfortably joins two wires within the 22 to 16 AWG range, but cannot accommodate conductors larger than 16 AWG or insulation thicker than the stated limit.

Practical limits of the IDC interface

The displacement connection relies on precise insulation diameter and wire gauge; wires outside the 22 to 16 AWG window or with insulation exceeding zero point one two inches will not seat correctly. The tin-plated brass contacts are rated for dry environments only, so exposure to moisture or contaminants degrades performance. No fill material is present, leaving the connection open to the surrounding atmosphere.

Highlights

  • Red colour for quick identification
  • Insulation-displacement design speeds up wire termination
  • Accepts 22 to 16 AWG solid or stranded conductors
  • Rated for 1000 V and 221 °F operating temperature
  • Pack of 100 connectors for volume jobs

Specifications

Brand3M
Length3.400
MaterialNo Fill
TypeDry Environment

Questions about this item

Will the 3M 557 connector accept the 16 AWG wire I already have in my harness?

Yes, the connector handles run and tap wires from 22 AWG up to 16 AWG with insulation diameter up to 0.12 in.

How can I verify the 3M 557 connection is sound after crimping?

A proper crimp seats the wire fully in the double U-element; inspect that insulation is pierced and the tin-plated brass contacts grip both conductors.

Does the PK100 pack include any installation tool or just the red connectors?

The pack contains 100 red displacement connectors only; a compatible crimping tool must be purchased separately.

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