# Ferrule Rittal AS 4051.551, insulated copper/polypropylene, 1.5 mm² cross-section, 8 mm length, pack of 4000

**URL:** https://aio.lv/en/product--rittal-4051551--12401123
**Data updated:** 2026-04-29 13:49 (EEST)
**Category:** Tool kits and accessories
**Manufacturer:** Rittal
**Manufacturer code:** 4051551
**EAN:** 4028177937994
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 78.99 €
**Prices and availability valid until:** 2026-07-14 23:59
**Price without VAT (21%):** 65.28 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--rittal-4051551--12401123

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 15.07.2026 | free |
| Pickup points | 20.07.2026 | 1.99 EUR |
| Courier delivery to door | 20.07.2026 | 4.99 EUR |

## Summary description

Rittal AS 4051.551 insulated ferrules (aderendhülsen) with a copper conductor part and polypropylene (PP) insulation. Designed for 1.5 mm² (AWG 16) conductors, 8 mm barrel length. Delivered in a pack of 4000 pieces, they provide reliable wire termination for control cabinets, switchgear and industrial electrical installations.

## Long description

Rittal insulated ferrules AS 4051.551 are crimp end terminals designed for reliable wire termination in control cabinets, switchgear and other industrial electrical installations. Each ferrule combines a tin-plated copper conductor sleeve with a polypropylene (PP) insulating collar to ensure consistent contact, reduce strand fraying and provide clear insulation at the wire entry point. The ferrules are sized for 1.5 mm² (AWG 16) conductors and feature an 8 mm barrel length. Supplied in a bulk pack of 4000 pieces, they are suitable for repetitive wiring tasks in electrical assembly and maintenance.
Advantages
The copper conductor sleeve ensures low contact resistance and good conductivity, while the polypropylene insulation provides mechanical protection and helps prevent short circuits and accidental contact. The consistent barrel length and uniform internal bore allow for stable crimp quality when used with appropriate crimping tools, improving reliability and reducing rework. Packaging in a large quantity supports efficient workflow in production or service environments.
Suitable for
Termination of stranded copper conductors 1.5 mm² (AWG 16)
Wiring in control cabinets, distribution boards and switchgear
Industrial panel building and electrical assembly lines
Maintenance and repair work requiring consistent crimped connections
When it may not be suitable
These insulated ferrules are specifically sized for 1.5 mm² conductors; they are not suitable for significantly larger or smaller conductor cross-sections. They are intended for copper conductors and should not be used with aluminium conductors without verifying compatibility. For applications that require higher temperature resistance or special chemical resistance, polypropylene insulation may not meet the requirements.
Key specifications
Conductor sleeve material: tin-plated copper
Insulation material: polypropylene (PP) with plastic collar
Nominal conductor cross-section: 1.5 mm² (AWG 16)
Barrel (sleeve) length: 8 mm
Pack quantity: 4000 pieces
How to use
Strip the insulation from the conductor to the correct length, insert the stranded copper conductor fully into the ferrule sleeve so strands are contained inside the metal tube, and crimp using a suitable ferrule crimping tool sized for 1.5 mm² ferrules. After crimping, inspect the connection to confirm the ferrule is seated and the strands are securely compressed. Insert the crimped ferrule into the terminal block or screw terminal and tighten to the recommended torque for the terminal type.
What to consider before purchase
Verify conductor size: intended for 1.5 mm² (AWG 16) stranded copper conductors
Confirm material suitability: tin-plated copper sleeve and polypropylene insulation meet your environmental and temperature needs
Ensure you have the correct crimping tool and dies for insulated ferrules of this size
Consider pack size: bulk pack of 4000 pieces for production or service use
Usage recommendations
Use these Rittal insulated ferrules with a matched insulated-ferrule crimping die and ensure the stripped conductor length matches the 8 mm barrel to achieve reliable, low-resistance connections. Store in a dry environment to maintain insulation and plating quality.

## Specifications

| Feature | Value |
|---|---|
| Material | Copper, Polypropylene (PP) |
| Product colour | Black |
| Length | 8 mm |
| Diameter | 4 mm |
| Quantity per pack | 4000 pc(s) |

## FAQ

### How much does the Rittal AS 4051.551 insulated ferrules 1.5 mm² cost, and is it available for purchase?

The price is 78.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 28 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 15.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All Rittal products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Rittal service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

### Where can I download the instructions for Rittal AS 4051.551 insulated ferrules 1.5 mm²?

You can download the instructions in PDF format from the “Instructions” section on the product description page. The file contains complete information about installation, setup, and usage.

## Image

https://aio.lv/img/cache/product/12401123/68689654_large.webp