# Siemens 3NA3344 NH Fuse Link, Size 3, 250A, 500V AC/440V DC, gG Class

**URL:** https://aio.lv/en/product--siemens-3na3344--1514236
**Data updated:** 2026-05-18 02:52 (EEST)
**Category:** Power Supplies (PSU)
**Manufacturer:** Siemens
**Manufacturer code:** 3NA3344
**EAN:** 4001869056456
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 137.49 €
**Prices and availability valid until:** 2026-07-18 23:59
**Price without VAT (21%):** 113.63 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--siemens-3na3344--1514236

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 10.07.2026 | free |
| Courier delivery to door | 15.07.2026 | 53.99 EUR |

## Summary description

The Siemens 3NA3344 is a high-performance NH fuse link designed for industrial electrical protection. Featuring size 3 construction, it offers a rated current of 250A and is suitable for systems up to 500V AC or 440V DC. This gG class fuse provides reliable short-circuit and overload protection for electrical installations. It features non-insulated gripping lugs for secure mounting in standard NH fuse bases, ensuring safety and durability in demanding power distribution applications.

## Long description

The Siemens 3NA3344 NH fuse link is a robust electrical protection component engineered for demanding industrial environments. Designed as a size 3 unit, this high-performance fuse provides a rated current of 250A and is compatible with systems operating at up to 500V AC or 440V DC. It serves as a critical safety element in power distribution networks, effectively interrupting circuits during overload or short-circuit events to prevent damage to downstream equipment.
Advantages
This fuse link is characterized by its high breaking capacity and reliable performance under varying electrical loads. The gG class classification ensures comprehensive protection for both cables and electrical lines, making it a versatile choice for industrial infrastructure. Its durable construction and non-insulated gripping lugs allow for secure and stable installation in standard NH fuse bases, facilitating efficient maintenance and long-term operational reliability in power distribution systems.
Suitable for
Industrial power distribution boards
Protection of electrical cables and lines
Switchgear and control gear assemblies
Heavy-duty electrical installations
When it may not be suitable
This fuse link is not intended for use in residential applications where standard miniature circuit breakers are typically employed. It is also not suitable for systems exceeding the specified voltage ratings of 500V AC or 440V DC, as this could lead to improper operation or safety hazards.
Key specifications
Fuse size: 3
Rated current: 250A
Rated voltage: 500V AC / 440V DC
Utilization category: gG
Mounting type: NH fuse base
Gripping lugs: Non-insulated
How to use
The Siemens 3NA3344 should be installed by qualified personnel into a compatible size 3 NH fuse base. Ensure that the power supply is disconnected before installation to prevent electrical shock. The fuse is inserted using an appropriate fuse handle or extraction tool, ensuring that the non-insulated gripping lugs are firmly seated within the base contacts. Once installed, verify that the connection is secure and that the surrounding environment is free of debris.
What to consider before purchase
Verify that the fuse size 3 matches your existing fuse base.
Ensure the 250A current rating is appropriate for your circuit requirements.
Check that your system voltage does not exceed 500V AC or 440V DC.
Confirm that the installation environment meets the requirements for non-insulated lug components.
Usage recommendations
Always replace a blown fuse with one of the exact same specifications to maintain the integrity of the electrical protection system. Regular inspection of the fuse base for signs of oxidation or loose connections is recommended to ensure optimal performance.

## FAQ

### How much does the Siemens 3NA3344 NH Fuse Link 250A Size 3 cost, and is it available for purchase?

The price is 137.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 6 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 10.07.2026 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 Siemens 3NA3344 NH Fuse Link 250A Size 3 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 Siemens 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 Siemens 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/1514236/47535618_large.webp