# Relpol RZ3A40A40 Three-Phase Solid State Relay 40A 24-440V AC

**URL:** https://aio.lv/en/product--relpol-rz3a40a40--12450272
**Data updated:** 2026-05-18 02:47 (EEST)
**Category:** Control Systems
**Manufacturer:** Relpol
**Manufacturer code:** RZ3A40A40
**EAN:** 5350035402924
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 293.99 €
**Prices and availability valid until:** 2026-07-14 23:59
**Price without VAT (21%):** 242.97 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--relpol-rz3a40a40--12450272

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 06.07.2026 | free |
| Pickup points | 09.07.2026 | 1.99 EUR |
| Courier delivery to door | 09.07.2026 | 4.99 EUR |

## Summary description

The Relpol RZ3A40A40 is a high-performance three-phase solid state relay designed for reliable switching in industrial applications. It features a rated current of 40A and an output voltage range of 24-440V AC. This semiconductor relay ensures silent operation, long service life, and high switching frequency, making it an ideal solution for controlling heating elements, motors, and other electrical loads in automation systems.

## Long description

The Relpol RZ3A40A40 is a high-performance three-phase solid state relay engineered for precise and reliable switching in demanding industrial environments. This semiconductor device facilitates efficient control of electrical loads by utilizing electronic components instead of mechanical contacts, which eliminates wear and tear associated with traditional relays. With a robust design, it provides consistent performance for applications requiring frequent switching cycles and silent operation.
Advantages
The primary benefit of this solid state relay is its exceptional durability and longevity due to the absence of moving parts. It offers high-speed switching capabilities that are essential for modern automation systems, ensuring rapid response times and precise control. Furthermore, the device operates silently, making it suitable for environments where noise reduction is a priority. Its compact design allows for efficient space utilization in control cabinets, while the solid-state architecture ensures resistance to vibration and shock, contributing to a longer operational lifespan compared to electromechanical alternatives.
Suitable for
Industrial heating element control
Motor soft starting and control
Lighting systems management
Automation and process control systems
HVAC equipment regulation
When it may not be suitable
This relay is not designed for switching DC loads, as it is specifically engineered for AC applications. Additionally, it may not be suitable for environments with extremely high ambient temperatures without adequate heat sinking, as solid state relays generate heat during operation that must be dissipated to prevent failure.
Key specifications
Rated current: 40A
Output voltage range: 24-440V AC
Control voltage: 24-275V AC/DC
Phase type: Three-phase
Switching type: Zero-crossing
How to use
Installation should be performed by qualified personnel in accordance with local electrical regulations. The relay must be mounted on a suitable heat sink to ensure proper thermal management, as heat dissipation is critical for maintaining the rated current capacity. Connect the control signal to the input terminals and the load to the output terminals, ensuring that all connections are secure and properly insulated. Verify that the load current does not exceed the rated capacity of the device before applying power.
What to consider before purchase
Ensure the load current does not exceed 40A
Verify that the control signal voltage matches the device specifications
Confirm that a compatible heat sink is available for installation
Check that the application requires AC switching
Usage recommendations
Always use an appropriately sized heat sink to prevent overheating and ensure the relay is protected by suitable fuses to prevent damage from short circuits or overcurrent conditions.

## FAQ

### How much does the Relpol RZ3A40A40 Three-Phase Solid State Relay cost, and is it available for purchase?

The price is 293.99 € (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 06.07.2026 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 Relpol RZ3A40A40 Three-Phase Solid State Relay 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 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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