# Thermal paste QOLTEC 51646 — thermal conductivity 3.17 W/m·K, weight 0.5 g

**URL:** https://aio.lv/en/product--qoltec-51646--767858
**Data updated:** 2026-03-07 10:54 (EET)
**Category:** Thermal Paste
**Manufacturer:** QOLTEC
**Manufacturer code:** 51646
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 15.99 €
**Prices and availability valid until:** 2026-07-10 23:59
**Price without VAT (21%):** 13.21 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--qoltec-51646--767858

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 02.07.2026 | free |
| Pickup points | 07.07.2026 | 1.99 EUR |
| Courier delivery to door | 07.07.2026 | 4.99 EUR |

## Summary description

QOLTEC 51646 is a thermal paste designed to improve heat transfer between electronic components and heatsinks. It has thermal conductivity of 3.17 W/m·K and thermal resistance of 0.067 °C/W, supplied as a 0.5 g quantity in one pack. Suitable for CPUs, GPUs, power ICs and other small-scale cooling applications requiring efficient thermal interface material.

## Long description

QOLTEC 51646 is a thermal paste formulated to improve heat transfer between electronic components and heatsinks. With a declared thermal conductivity of 3.17 W/m·K and thermal resistance of 0.067 °C/W, this thermal interface material is supplied as a 0.5 g quantity in a single pack. The paste is electrically insulating, fills micro-gaps between a processor and cooling base, and is presented for use in small-scale cooling applications where efficient conduction and long-term stability are required.
Advantages
The compound combines relatively high thermal conductivity with electrical insulation, enabling safer contact with components. It is designed to evenly fill microscopic unevenness on contact surfaces, improving thermal coupling without requiring large quantities. The product is described as easy to apply and stable over time, maintaining its thermal properties and reducing the need for frequent replacement.
Suitable for
 CPU cooling in desktop and small form-factor systems
 GPU cooling for compact graphics modules
 Power ICs and voltage regulators on circuit boards
 Small heatsinks and embedded electronics thermal interfaces
Key specifications
 Thermal conductivity: 3.17 W/m·K
 Thermal resistance: 0.067 °C/W
 Weight: 0.5 g
 Electrical characteristic: insulating (non-conductive)
 Form: paste for manual application
How to use
Clean both mating surfaces (chip and heatsink) from old thermal compound, dust and oils using isopropyl alcohol or a manufacturer-recommended cleaner, and allow them to dry. Apply a small, pea-sized amount of QOLTEC 51646 onto the center of the processor or component. Mount the heatsink and secure it evenly so the paste spreads into a thin, continuous layer; avoid excessive pressure or applying excessive paste, which can reduce thermal transfer. For power ICs or irregular surfaces, use a thin, even layer to ensure full coverage of contact areas. Follow component manufacturer guidance for mounting torque and sequence where applicable.
Usage recommendations
Store the product in a cool, dry place and avoid contamination of the paste by dust or moisture. Use the supplied quantity for small-scale applications; for larger assemblies select an amount sufficient to create a continuous interface layer without overflow. Reinspect thermal performance during routine maintenance and reapply only if thermal characteristics degrade or after removal of the heatsink.

## Specifications

### Features

| Feature | Value |
|---|---|
| Thermal resistance | 0.067 °C/W |
| Thermal conductivity | 3.17 W/m·K |

### Weight & dimensions

| Feature | Value |
|---|---|
| Weight | 0.0005 kg |

### Packaging data

| Feature | Value |
|---|---|
| Quantity per pack | 1 pc(s) |

## FAQ

### How much does the Thermal paste QOLTEC 51646 3.17 W/m·K cost, and is it available for purchase?

The price is 15.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 384 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 02.07.2026 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 QOLTEC 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 QOLTEC 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

### How can I tell if this product suits my needs?

When making a choice, we recommend paying attention to the key features: thermal conductivity, weight, compatibility with your devices or usage conditions, material quality, functionality, and warranty terms. These characteristics will help you determine how well the model meets your needs.

## Image

https://aio.lv/img/cache/product/767858/56507625_large.webp