# Siemens 3NC1020 SITOR Cylindrical Fuse Link 20A aR 600VAC/400VDC

**URL:** https://aio.lv/en/product--siemens-3nc1020--1514362
**Data updated:** 2026-05-18 02:52 (EEST)
**Category:** Home & DIY Accessories
**Manufacturer:** Siemens
**Manufacturer code:** 3NC1020
**EAN:** 4011209569928
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 12.49 €
**Prices and availability valid until:** 2026-07-24 23:59
**Price without VAT (21%):** 10.32 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--siemens-3nc1020--1514362

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 14.07.2026 | free |
| Pickup points | 17.07.2026 | 1.89 EUR |
| Courier delivery to door | 17.07.2026 | 4.99 EUR |

## Summary description

The Siemens 3NC1020 is a SITOR cylindrical fuse link designed for semiconductor protection. It features a 20A rated current and aR characteristic, suitable for applications requiring 600VAC or 400VDC. This high-performance fuse ensures reliable circuit protection in industrial electrical systems, providing fast-acting response to overcurrent conditions in demanding power electronics environments.

## Long description

The Siemens 3NC1020 SITOR cylindrical fuse link is a specialized component engineered for the protection of semiconductors in power electronics. With a rated current of 20A and an aR characteristic, this fuse provides fast-acting protection against short circuits, ensuring the integrity of sensitive electronic components in industrial electrical systems. It is designed to operate reliably in environments requiring up to 600VAC or 400VDC, making it a robust solution for demanding power conversion applications.
Advantages
This fuse link offers high-speed response times, which is critical for preventing damage to semiconductors during fault conditions. Its cylindrical design allows for efficient heat dissipation and compact installation within electrical panels. The aR characteristic ensures that the fuse is specifically tuned to handle the unique thermal and electrical stresses associated with semiconductor devices, providing a higher level of protection compared to standard general-purpose fuses.
Suitable for
Semiconductor protection in power converters
Industrial power electronics systems
Uninterruptible power supply (UPS) units
Frequency converters and motor drives
Battery charging and energy storage systems
When it may not be suitable
This fuse is not intended for general-purpose residential circuit protection or for applications where a slow-blow characteristic is required to handle high inrush currents. It should not be used in circuits exceeding its specified voltage or current ratings.
Key specifications
Rated current: 20A
Utilization category: aR (semiconductor protection)
Maximum AC voltage: 600VAC
Maximum DC voltage: 400VDC
Design: Cylindrical fuse link
How to use
The fuse should be installed into a compatible cylindrical fuse holder designed for the appropriate physical dimensions. Ensure that the power supply is completely disconnected before attempting to insert or replace the fuse. The fuse must be seated firmly within the clips of the holder to ensure proper electrical contact and to prevent overheating due to high contact resistance. Always verify that the circuit parameters do not exceed the fuse's rated voltage and current specifications.
What to consider before purchase
Verify the current and voltage requirements of your specific semiconductor application
Ensure the physical dimensions of the fuse holder match the cylindrical form factor
Confirm that the aR characteristic is appropriate for the specific protection needs of your equipment
Usage recommendations
Always replace the fuse with one of the exact same type and rating to maintain the safety and performance of the electrical system. Do not attempt to repair or bypass a blown fuse.

## FAQ

### How much does the Siemens 3NC1020 SITOR Cylindrical Fuse Link cost, and is it available for purchase?

The price is 12.49 € (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 14.07.2026 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 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/1514362/47552025_large.webp