Twin Wire Ferrules & Double Bootlace Ferrules

Product overview

The usual reason for using one is a daisy chain: a supply that has to feed two loads from one terminal point, where the terminal itself is only rated for one conductor.

Why not just twist two wires together?

Two loose conductors pushed into one screw terminal is the single most common cause of a loose connection in a control panel. The strands splay, the clamp bites unevenly, and one of the two wires ends up carrying the load through a fraction of its cross-section.

A twin ferrule solves it mechanically: both conductors are compressed into one solid, correctly sized cylinder, and the terminal clamps a single defined shape.

Check the terminal rating first. A twin ferrule makes the crimp sound, but it does not authorise a terminal to accept two conductors. If the terminal manufacturer specifies one conductor per clamping point, use a bridge or a distribution block instead.

Twin wire ferrule specifications

Dimension letters: F pin length · L overall length · W collar width · H collar length · D barrel outside Ø · C barrel inside Ø. All dimensions in mm. If one conductor pair is listed with several F values, use the ferrule pin length guide before selecting one.

Twin ferrule sizes

AWG values in this table are Termnex product catalogue and packaging labels, not mathematical conversions. Use each conductor’s marked mm² cross-section as the primary twin-ferrule size.

The current rating is per conductor, not the sum. A 2×2.5 mm² ferrule is rated 30 A the same as a single 2.5 mm² — it does not carry 60 A. Size the ferrule to the conductors going into it, and size the circuit protection to the terminal.

Need every series at one cross-section? 0.5 mm² · 0.75 mm² · 1 mm² · 1.5 mm² · 2.5 mm² · 4 mm² · 6 mm² · 10 mm² · 16 mm² · 25 mm² · 35 mm² · 50 mm². Each page puts the insulated, twin and non-insulated models for that conductor size in one table, with the AWG equivalent and the DIN collar colour.

Ordering twin wire ferrules

• Sold by the pack — quantities listed above.
• HTE7508 grey, HTE1508 black and HTE2508 blue are selected Termnex stock configurations after incoming inspection.
• Other catalogue sizes and colours are available to order; quantity and lead time are confirmed with the quotation.
• Factory packs are not split by the manufacturer.
• Single-size packs are standard; a mixed twin assortment can be built to a specified ratio. See the wire ferrule kits and twin pack options.
• Model-specific Declaration of Conformity and supporting compliance documents can be reviewed with the quotation.

Need a single conductor instead? See insulated wire ferrules or non-insulated ferrules.

FAQ

Can I put two different wire sizes into one twin ferrule?

It is not good practice. The barrel is sized for two conductors of equal cross-section; a mismatched pair leaves the smaller wire under-compressed. If you have to combine unequal sizes, use a distribution terminal.

What crimp profile does a twin ferrule need?

The same square or trapezoidal profile as a single ferrule — no special tool. SN-06WF covers up to 2×6 mm², HX-35WF covers 2×10 mm² and above.

Is the colour code the same as single ferrules?

It follows the same DIN 46228-4 colours for the individual conductor size, so a 2×1.5 mm² twin uses the 1.5 mm² colour. Note this differs between the DIN and French systems — quote the colour on the order if your drawing specifies one.

Do twin ferrules come non-insulated?

Not in this series. Non-insulated is single-conductor only — see non-insulated ferrules.