# Legrand 421004 Door Operating Mechanism with Interlock for DPX3

**URL:** https://aio.lv/en/product--legrand-421004--12466510
**Data updated:** 2026-05-18 09:41 (EEST)
**Category:** Server Parts & Components
**Manufacturer:** Legrand
**Manufacturer code:** 421004
**EAN:** 3245064210041
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 150.49 €
**Prices and availability valid until:** 2026-07-12 23:59
**Price without VAT (21%):** 124.37 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--legrand-421004--12466510

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 03.07.2026 | free |
| Pickup points | 08.07.2026 | 1.99 EUR |
| Courier delivery to door | 08.07.2026 | 4.99 EUR |

## Summary description

The Legrand 421004 is a door operating mechanism designed for DPX3 circuit breakers. This black-finished accessory provides reliable mechanical control and safety interlock functionality for electrical distribution cabinets. It ensures secure operation and proper access management for industrial electrical installations, facilitating efficient maintenance and protection of the switchgear system.

## Long description

The Legrand 421004 door operating mechanism is a professional-grade accessory engineered specifically for integration with DPX3 circuit breakers. This device allows for the external operation of circuit breakers mounted inside electrical distribution cabinets, providing a secure and ergonomic interface for facility managers and maintenance personnel. Finished in a durable black coating, the mechanism is designed to withstand the rigors of industrial environments while maintaining a clean, professional appearance within the switchgear assembly.
Advantages
The primary benefit of this mechanism is the integrated safety interlock functionality, which prevents the cabinet door from being opened while the circuit breaker is in the closed position. This feature significantly enhances operational safety by ensuring that personnel are protected from live electrical components during maintenance or inspection. The robust construction ensures long-term reliability and smooth mechanical operation, contributing to the overall efficiency and safety of electrical distribution systems.
Suitable for
Industrial electrical distribution cabinets
Commercial power management systems
Switchgear assemblies requiring external control
Installations where safety interlock protocols are mandatory
When it may not be suitable
This mechanism is specifically designed for use with Legrand DPX3 circuit breakers and may not be compatible with other series or brands. It is not intended for outdoor environments without appropriate cabinet protection or for applications where external manual operation is not required.
Key specifications
Compatibility: Legrand DPX3 circuit breakers
Mechanism type: Door operating handle with interlock
Color: Black
Width: 110 mm
Height: 80 mm
Depth: 424 mm
How to use
The mechanism is installed on the exterior of the electrical cabinet door, connected to the internal DPX3 circuit breaker via the provided linkage. Once installed, the handle allows for the manual switching of the breaker without opening the cabinet door. The interlock system automatically engages when the breaker is closed, locking the door to prevent unauthorized or accidental access to live parts. To open the door, the breaker must be switched to the open position, which releases the mechanical interlock.
What to consider before purchase
Verify compatibility with your specific DPX3 circuit breaker model
Ensure the cabinet door thickness is compatible with the handle assembly
Confirm that the internal space allows for the 424 mm depth requirement
Usage recommendations
Always ensure that the installation is performed by a qualified electrician in accordance with local safety regulations. Regularly inspect the mechanical linkage for signs of wear to maintain the integrity of the interlock system.

## Specifications

| Feature | Value |
|---|---|
| Weight | 0.72 kg |
| Height | 80 mm |
| Width | 110 mm |
| Depth | 424 mm |
| Quantity per pack | 1 pc(s) |

## FAQ

### How much does the Legrand 421004 Door Operating Mechanism for DPX3 cost, and is it available for purchase?

The price is 150.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 2 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 03.07.2026 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, Bank cards on-line, Apple Pay, Google Pay, Installment. All transactions are 100% secure and encrypted.

### Can Legrand 421004 Door Operating Mechanism for DPX3 be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### 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 Legrand 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 Legrand 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 Legrand 421004 Door Operating Mechanism for DPX3?

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/12466510/68790247_large.webp