Insulated Ferrules (Wire & Bootlace Ferrules)

Product overview

Termnex supplies the full DIN 46228-4 range from a single production line, in both DIN and French NF C 63-023 colour sets.

Every size below lists its pin length, collar dimensions and pack quantity. Six common models have their own verified pages — they are linked directly from the part number in the tables.

Choose insulated ferrules by wire size and pin length

Insulated ferrule specifications

Common to every size in this series:

Dimension letters used in the tables: F pin length · L overall length · W collar width · H collar length · D barrel outside Ø · C barrel inside Ø. All dimensions in mm.

Insulated ferrule sizes: 0.3 – 4 mm²

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

If your wire documentation uses AWG, check the AWG to mm² converter before choosing a table row. It separates calculated conductor area from nominal catalogue references.

cULus Listed to UL 486F on selected models from 0.5 to 6 mm². Coverage is assigned per part number rather than per size band, so a few models inside that range are not listed. Ask us to confirm a part number before specifying it into a UL panel build; the certificate and file record are supplied with the quotation, alongside the CE Declaration of Conformity and RoHS documentation supplied with every model in this range.

Insulated ferrule sizes: 6 – 150 mm²

Above 50 mm² there is no standardised collar colour. DIN 46228-4 stops at 50 mm², so the colours listed for 70 –150 mm² are our production standard, not a standard requirement. Confirm the colour on the order rather than assuming it from a chart.

Colour standards

The collar colour identifies the cross-section, but two different systems are in use and they do not agree:

Termnex can supply both sets. If your drawing specifies a colour, quote it on the enquiry — a red 1.5 mm² ferrule is correct under the French system and wrong under DIN, and vice versa. See our guide to wire ferrule sizes and colour codes for the complete DIN table.

North America has no colour standard at all — UL 486F is a listing standard and defines no colour system. Ferrules sold in the US carry whatever colour the manufacturer chose.

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 insulated wire ferrules

• Sold by the pack — quantities per pack are listed in the tables above.
• Selected DIN-colour configurations are available from Termnex stock for sampling and small orders after incoming inspection.
• Other catalogue models and colour combinations are available to order; lead time is confirmed against the requested model and quantity.
• Factory packs are not split by the manufacturer.
• For mixed-size control and power boxes, compare the insulated wire ferrule kits and assortments, including a 1,200-piece option with a ratchet crimper.
• Model-specific Declaration of Conformity and supporting compliance documents can be reviewed with the quotation.

FAQ

What is the difference between a wire ferrule and a bootlace ferrule?

Nothing. They are the same part. Wire ferrule is the usual North American term, bootlace ferrule the usual British one, and cord end terminal is what most manufacturers print on the box.

Which pin length should I choose?

Start with the terminal manufacturer’s stated ferrule or strip-length requirements. Use a specified ferrule length directly; if the terminal gives only a strip length, treat it as a compatibility input and confirm the pin length rather than assuming the two numbers are equal. Do not choose from conductor size alone, because the same cross-section is listed with several F values.

Do I need a different crimp tool for each size?

Not for each size, but for each range. SN-06WF covers 0.3 – 6 mm²; HX-35WF covers 6 – 35 mm². Sizes above 35 mm² need a hydraulic or heavy mechanical crimper.

Are these UL listed?

Some of them. Selected models from 0.5 to 6 mm² are cULus Listed to UL 486F. Coverage is assigned per part number rather than per size band, so a few models inside that range are not listed, and nothing above 6 mm² is. Ask us to confirm a specific part number before specifying it into a UL 508A panel build; the certificate and file record are supplied with the quotation so the listing can be verified.

Can I get a colour that is not listed?

Yes. Selected DIN colours are held for sampling and small orders, while other catalogue colours are confirmed against the requested model and quantity. State the colour system on the RFQ rather than relying on colour alone.