# M12 4‑pole D‑coded Connector Harting HARAX – circular industrial signal/data connector

**URL:** https://aio.lv/en/product--harting-21-03-281-1405--3260052
**Data updated:** 2026-02-12 09:50 (EET)
**Category:** Network Equipment Accessories
**Manufacturer:** Harting
**Manufacturer code:** 21 03 281 1405
**EAN:** 2050001838025
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 50.99 €
**Prices and availability valid until:** 2026-07-30 23:59
**Price without VAT (21%):** 42.14 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--harting-21-03-281-1405--3260052

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 28.07.2026 | free |
| Pickup points | 31.07.2026 | 1.89 EUR |
| Courier delivery to door | 31.07.2026 | 4.99 EUR |

## Summary description

Harting HARAX M12 4‑pole D‑coded connector for industrial signal and data transmission. The circular connector provides four contacts in D‑coding to prevent mismating and is suitable for sensor, actuator and fieldbus connections. Designed for reliable electrical contact and robust performance in industrial automation and control applications.

## Long description

The Harting HARAX M12 4‑pole D‑coded connector is a circular industrial signal and data connector designed for reliable transmission in automation and control environments. Featuring four contacts arranged in D‑coding, the connector reduces the risk of mismating with other M12 types while supporting sensor, actuator and fieldbus wiring. Its compact circular design and robust contact system provide consistent electrical performance for industrial signal and Ethernet-like data lines used in factory and process automation.
Advantages
The M12 4‑pole D‑coded configuration ensures correct mating with compatible D‑coded receptacles, minimising connection errors. The connector delivers stable contact resistance and is built to withstand the mechanical and electrical demands of industrial installations. Its circular form factor and proven HARAX design allow straightforward integration into sensor and actuator networks, while D‑coding supports signal and data separation to meet system requirements.
Suitable for
 Sensor and actuator connections in industrial automation
 Fieldbus and industrial Ethernet signal lines requiring D‑coding
 Panel and machine wiring in control cabinets and distributed I/O
 Applications where robust, compact circular connectors are needed
Key specifications
 Connector type: circular M12 with 4 contacts
 Coding: D‑coded to prevent mismating with other M12 codings
 Contact count: 4 contacts suitable for signal and data pairs
 Contact materials and plating: designed for low contact resistance and reliable conductivity
 Mechanical design: compact circular housing for panel or pre‑wired mounting
 Environmental suitability: intended for industrial electrical environments (mechanical robustness and stable contact performance)
How to use
Install the connector by aligning the D‑coding key with the matching receptacle to ensure correct orientation. Secure the connector to the mating part or panel according to mounting provisions, and verify that contacts engage fully to achieve low resistance connections. Use compatible cable types and follow standard wiring practices for signal or data pairs. Ensure proper strain relief and, where applicable, routing that minimises mechanical stress and exposure to excessive vibration.
Usage recommendations
Use the connector in systems that require clear separation of signal and data paths and where mating reliability is important. Regularly inspect contacts and housings for wear or contamination in harsh environments, and follow the equipment manufacturer's guidelines for torque and mounting to maintain connection integrity.

## FAQ

### How much does the M12 4‑pole D‑coded Connector Harting HARAX cost, and is it available for purchase?

The price is 50.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 111 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 28.07.2026 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 Harting 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 Harting 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

## Image

https://aio.lv/img/cache/product/3260052/47651069_large.webp