# Relpol D Module Diode 6-230V DC M21N

**URL:** https://aio.lv/en/product--relpol-854777--12469000
**Data updated:** 2026-05-18 09:28 (EEST)
**Category:** Computer Component Accessories
**Manufacturer:** Relpol
**Manufacturer code:** 854777
**EAN:** 5900005099717
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 5.99 €
**Prices and availability valid until:** 2026-07-12 23:59
**Price without VAT (21%):** 4.95 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--relpol-854777--12469000

## 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 Relpol D module is a diode suppression unit designed for 6-230V DC applications. This M21N series component is engineered to protect relay coils and control circuits from voltage spikes and electromagnetic interference. It ensures reliable operation in industrial automation and control systems, providing effective surge protection and extending the service life of connected switching devices.

## Long description

The Relpol D module is a professional diode suppression unit engineered for 6-230V DC applications. As part of the M21N series, this component serves as a critical protective element for relay coils and sensitive control circuits. By effectively suppressing voltage spikes and mitigating electromagnetic interference, the module ensures the stable and reliable operation of industrial automation systems, ultimately extending the service life of your switching equipment.
Advantages
This diode module provides robust protection against transient overvoltages that can occur during the de-energization of inductive loads. Its compact design allows for seamless integration into existing control panels without requiring significant space. By absorbing back-EMF, it prevents damage to electronic controllers and contactors, ensuring consistent performance and reducing the frequency of maintenance cycles in demanding industrial environments.
Suitable for
Industrial automation and control systems
Protection of relay coils in DC circuits
Mitigation of electromagnetic interference in switching devices
Extending the lifespan of contactors and solenoid valves
When it may not be suitable
This module is specifically designed for DC voltage applications and is not compatible with AC circuits. Using this component in an AC environment may lead to device failure or short circuits.
Key specifications
Operating voltage range: 6-230V DC
Series: M21N
Function: Diode suppression
Application: Inductive load protection
How to use
The Relpol D module is designed for quick and easy installation directly onto compatible relay sockets. Ensure that the power supply is disconnected before installation. Align the module with the designated slots on the relay base and press firmly until it clicks into place. Verify that the polarity matches the requirements of your specific circuit configuration to ensure the diode functions correctly as a suppression element.
What to consider before purchase
Verify that your control circuit operates on DC voltage
Check compatibility with your specific relay base model
Ensure the voltage range of your application falls within the 6-230V DC limit
Usage recommendations
Always confirm that the diode orientation is correct relative to the coil polarity to ensure effective surge suppression. Regularly inspect the module during scheduled maintenance to ensure connections remain secure and free from corrosion.

## FAQ

### How much does the Relpol D Module Diode 6-230V DC M21N cost, and is it available for purchase?

The price is 5.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 80 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. 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 Relpol 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 Relpol 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

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