# Heat Sink, TO-3, 4.8 °C/W, TO-3, 46 mm, 31.8 mm, 46 mm

![Product image](https://novapart.co/image/farnell:1892313/)

**URL**: https://novapart.co/products/FK%20318%20SA%203/heat-sink-to-3-48-c-w-46-mm-318
**SKU**: FK 318 SA 3
**Manufacturer**: FISCHER ELEKTRONIK
**Category**: Cooling & Thermal Management || Heat Sinks || Natural Convection Heat Sinks
**Price**: €7.8800
**Stock**: 10+
**Lead Time**: 92 days (indicative)

## Description

Thermal Resistance:4.8°C/W; Packages Cooled:TO-3; External Width - Metric:46mm; External Height - Metric:31.8mm; External Length - Metric:46mm; External Diameter - Me; Available until stocks are exhausted

## Specifications

| Parameter | Value |
|---|---|
| Svhc | No SVHC (25-Jun-2025) |
| Product Range | - |
| Packages Cooled | TO-3 |
| Heat Sink Material | Aluminium |
| Thermal Resistance | 4.8°C/W |
| External Width - Metric | 46mm |
| External Height - Metric | 31.8mm |
| External Length - Metric | 46mm |
| External Width - Imperial | 1.81" |
| External Diameter - Metric | - |
| External Height - Imperial | 1.25" |
| External Length - Imperial | 1.81" |
| External Diameter - Imperial | - |

## Datasheet

📄 [Download PDF](https://novapart.co/datasheet/farnell:1892313/)

H 

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## **Finger shaped heatsinks for power semiconductors** 

**art. no.** [mm] Rth [K/W] **art. no.** [mm] Rth [K/W] re ee ~~ee~~ **FK 127 SA-3** 12.7 8.0 TO 3 **FK 127 SA** 12.7 8.0 without Po **FK 191 SA-3** 19.1 6.6 TO 3 **FK 191 SA** 19.1 6.6 without Po **FK 318 SA-3** 31.8 4.8 TO 3 **FK 318 SA** 31.8 4.8 without Po **FK 254 SA-3** 25.4 5.8 TO 3 ~~i~~ ae ~~eG~~ Gd **material:** die-cast aluminium **surface treatment:** black lacquered 

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**----- Start of picture text -----**<br>
art. no. [mm] Rth art. no. [mm] Rth<br>Le [K/W] eLe [K/W] e<br>FK 201 SA 25.4 6 without FK 202 SA 12.7 8 without<br>a ee es<br>FK 201 SA 3 25.4 6 TO 3 FK 202 SA 3 12.7 8 TO 3<br>Po<br>FK 201 SA CB 25.4 6 CB FK 202 SA CB 12.7 8 CB<br>a BR es G e<br>**----- End of picture text -----**<br>


**==> picture [511 x 98] intentionally omitted <==**

**----- Start of picture text -----**<br>
S art. no. [mm] e Rth [K/W]<br>a FK 205 SA L a 31.8 9.0 L<br>a FK 206 SA L a 25.4 10.5 L<br>a FK 207 SA L ee 19.1 12.0 L<br>a FK 208 SA L a 12.7 14.0 L<br>material: aluminium<br>surface treatment: black anodised<br>**----- End of picture text -----**<br>


**H** 

**H Attachable heatsinks** ➔ **C 10 – 14 Snap rivet** ➔ **E 37 Heatsinks for TO 5 and TO 18** ➔ **C 15 – 16 Kapton insulator washers** ➔ **E 8 Heatsinks for D PAK** ➔ **C 17 Silicone wafers** ➔ **E 2 – 4 Aluminium oxide wafers** ➔ **E 9 – 10 Mica wafers** ➔ **E 11** 

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## Links

- [View this product on Novapart](https://novapart.co/products/FK%20318%20SA%203/heat-sink-to-3-48-c-w-46-mm-318)
- [Request a quote for this part](https://novapart.co/quote/)
- [Supplier page](https://es.farnell.com/fischer-elektronik/fk-318-sa-3/heatsink-to-3/dp/1892313)
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