# EATON AZ-3N-D40 Miniature Circuit Breaker 3P+N 40A 25kA D-Curve

**URL:** https://aio.lv/en/product--eaton-174531--12470482
**Data updated:** 2026-05-18 09:41 (EEST)
**Category:** Power Sockets
**Manufacturer:** EATON
**Manufacturer code:** 174531
**EAN:** 4015081709878
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 122.99 €
**Prices and availability valid until:** 2026-08-05 23:59
**Price without VAT (21%):** 101.64 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--eaton-174531--12470482

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 24.07.2026 | free |
| Pickup points | 29.07.2026 | 1.89 EUR |
| Courier delivery to door | 29.07.2026 | 4.99 EUR |

## Summary description

The EATON AZ-3N-D40 is a high-performance 3P+N miniature circuit breaker designed for industrial and commercial electrical distribution systems. Featuring a 40A rated current, 25kA breaking capacity, and D-type tripping characteristic, it provides reliable protection against short circuits and overloads. This robust device ensures safety and operational continuity in demanding electrical installations.

## Long description

The EATON AZ-3N-D40 is a high-performance 3P+N miniature circuit breaker engineered for robust electrical protection in industrial and commercial distribution systems. This device is specifically designed to handle high-demand electrical environments, offering a 40A rated current and an impressive 25kA breaking capacity. With its D-type tripping characteristic, it is optimized for circuits with high inrush currents, ensuring that the system remains stable during normal operation while providing rapid disconnection in the event of a short circuit or overload.
Advantages
This circuit breaker stands out due to its exceptional reliability and durability in demanding electrical installations. The 3P+N configuration allows for comprehensive protection of three-phase systems with a neutral conductor, ensuring complete circuit isolation when necessary. Its high breaking capacity of 25kA provides a significant safety margin, protecting downstream equipment from severe fault currents. The D-curve characteristic is particularly beneficial for applications involving motors, transformers, or other inductive loads that generate significant current spikes during startup, preventing nuisance tripping.
Suitable for
Industrial machinery and motor control centers
Commercial electrical distribution boards
Systems with high inrush current equipment
Large-scale lighting installations
Power distribution for HVAC systems
When it may not be suitable
This device is not intended for residential applications where standard B or C curve breakers are typically sufficient. Using a D-curve breaker in circuits without high inrush currents may result in delayed protection during minor faults, as it is designed to tolerate higher temporary current surges.
Key specifications
Rated current: 40A
Number of poles: 3P+N
Breaking capacity: 25kA
Tripping characteristic: D-curve
Application: Industrial and commercial
How to use
The EATON AZ-3N-D40 should be installed by a qualified electrician in accordance with local electrical codes and safety regulations. It is designed for mounting on a standard DIN rail within a distribution enclosure. Ensure that the supply cables are correctly sized for a 40A load and securely fastened to the terminals to prevent overheating. Once installed, the device can be manually switched on or off using the front-facing toggle, and it will automatically trip to the off position if an electrical fault is detected.
What to consider before purchase
Verify that the 40A rating matches your circuit load requirements
Ensure the D-curve characteristic is appropriate for your specific load type
Check that the enclosure has sufficient space for a 3P+N module
Confirm compatibility with your existing distribution board busbar system
Usage recommendations
Regularly inspect the circuit breaker for signs of thermal stress or loose connections. It is recommended to perform periodic testing of the installation to ensure the device remains functional and provides the intended level of protection for your electrical infrastructure.

## FAQ

### How much does the EATON AZ-3N-D40 3P+N 40A Miniature Circuit Breaker cost, and is it available for purchase?

The price is 122.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 3 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 24.07.2026 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 EATON AZ-3N-D40 3P+N 40A Miniature Circuit Breaker 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 EATON 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 EATON 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/12470482/68773079_large.webp