---
title: "ID7 Heatsinks"
slug: "id7-heatsinks"
updated: 2025-03-17T10:43:42Z
published: 2025-03-17T10:43:42Z
canonical: "docs-linescan.alliedvision.com/id7-heatsinks"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://docs-linescan.alliedvision.com/llms.txt
> Use this file to discover all available pages before exploring further.

# ID7 Heatsinks

| ![notice](https://cdn.document360.io/eca58697-9c2f-461e-9f0a-e6205b74b693/Images/Documentation/notice.svg) | **NOTICE** |
| --- | --- |
| **Damage to the LED module** |
| The operation of high power LEDs requires a thermal management for the LED module. Less cooling might result in damage to the LED module. - Use suitable heatsinks for your application |

The heatsink option depends on the total power input of the Corona II module. The usage of heatsinks is mandatory.

The total power input is affected by the following parameters:

- Current in the control unit
- Duty cycle of LED operation in pulse mode

The cooling power of a heatsink is affected by the following parameters:

- Ambient temperature
- Orientation of the Corona II module

| orientation Corona II | orientation heatsink | cooling efficiency [%] |
| --- | --- | --- |
| ![heatsink-orientation-horizontal_v03](https://cdn.document360.io/eca58697-9c2f-461e-9f0a-e6205b74b693/Images/Documentation/heatsink-orientation-horizontal_v03.svg) | horizontal | horizontal | 85 |
| ![heatsink-orientation-horizontal-vertical_v03](https://cdn.document360.io/eca58697-9c2f-461e-9f0a-e6205b74b693/Images/Documentation/heatsink-orientation-horizontal-vertical_v03.svg) | horizontal | vertical | 90 |
| ![heatsink-orientation-vertical_v03](https://cdn.document360.io/eca58697-9c2f-461e-9f0a-e6205b74b693/Images/Documentation/heatsink-orientation-vertical_v03.svg) | vertical | vertical | 100 |

The following heatsink options are available:

- Small passive heatsink
- Medium passive heatsink
- Big passive heatsink
- Water cooling (up to 2018)
- Water cooling (from 2019)
- Fan cooling
- Thermal pad

To see the mechanical dimensions refer to mechanical dimensions of your [Corona II module](/v1/docs/corona-ii-modules).

## Suitable heatsink for your application

### Calculation of the maximum operating temperature of the Corona II module

To choose a suitable heatsink the maximum module temperature of the Corona II housing has to be calculated:

TCORONA = TA + PCORONA · RTH · F1 · F2 · F3

| TCORONA | Temperature of the Corona II housing at the hottest point |
| --- | --- |
| TA | Ambient temperature |
| PCORONA | Power input of one Corona II channel. It is assumed that a Corona II module with several channels is operated with a unique operating current IWORK for all channels. |
| RTH | Thermal resistance of the heatsink. Refer to [ID7 Heatsinks](/v1/docs/id7-heatsinks). |
| F1 | Correction factor for mounting orientation of the heatsink |
| horizontal mounting | F1 = 1.00 |
| vertical mounting | F1 = 0.85 |
| F2 | Correction factor for module length |
| for 170 mm | F2 = 0.88 |
| for 340 mm | F2 = 0.92 |
| for 510 mm | F2 = 0.97 |
| for 680 mm | F2 = 1.00 |
| F3 | Correction factor for thermal coupling |
| for free mounting without additional heat flow over solid metal connections | F3 = 1.0 |
| mounting with additional heat flow connections; depends on heat flow conditions | F3 = 1.0 – 0.8 |

### Example

A Corona II module with length 340 mm and heat sink option B is operated at an ambient temperature of 25 °C. The module is mounted horizontally and has a good thermal contact to a large solid machine frame. The module is operated with a channel current of 0.9 A. The temperature is calculated as follows:

TCORONA = 25 °C + 34 W · 1.52 K/W · 1.00 · 0.92 · 0.85 = 65 °C

If the channel current is increased to 1.8 A the temperature is calculated as follows:

TCORONA = 25 °C + 74 W · 1.52 K/W · 1.00 · 0.92 · 0.85 = 82 °C

The maximum operating temperature of the Corona II module is 75 °C. The temperature at 1.8 A is too high. Use an additional air flow or a heat sink with a lower thermal resistence RTH to decrease the temperature.

![](https://cdn.document360.io/eca58697-9c2f-461e-9f0a-e6205b74b693/Images/Documentation/image(30).png)