# Heat Sink, Extruded, PCB Mount, 7.8 °C/W, SOT-32, TO-3P, TO-220, 42 mm, 25.4 mm, 25 mm

![Product image](https://novapart.co/image/farnell:1319810/)

**URL**: https://novapart.co/products/SK%20129%2025,4%20STS%20SOT%2032/heat-sink-extruded-pcb-mount-78-c-w-sot-32-to-3p
**SKU**: SK 129 25,4 STS SOT 32
**Manufacturer**: FISCHER ELEKTRONIK
**Category**: Cooling & Thermal Management || Heat Sinks || Natural Convection Heat Sinks
**Price**: €2.9100
**Stock**: 200+
**Lead Time**: 92 days (indicative)

## Description

Thermal Resistance:7.8°C/W; Packages Cooled:SOT-32, TO-3P, TO-220; External Width - Metric:42mm; External Height - Metric:25.4mm; External Length - Metric:25mm; External Diameter - Metr

## Specifications

| Parameter | Value |
|---|---|
| Svhc | No SVHC (25-Jun-2025) |
| Product Range | - |
| Packages Cooled | SOT-32, TO-3P, TO-220 |
| Heat Sink Material | Aluminium |
| Thermal Resistance | 7.8°C/W |
| External Width - Metric | 42mm |
| External Height - Metric | 25.4mm |
| External Length - Metric | 25mm |
| External Width - Imperial | 1.65" |
| External Diameter - Metric | - |
| External Height - Imperial | 1" |
| External Length - Imperial | 0.98" |
| External Diameter - Imperial | - |

## Datasheet

📄 [Download PDF](https://novapart.co/datasheet/farnell:1319810/)

**A** - 

> **Extruded** fisciner **heatsinks** elektronik **for PCB mounting** =.= 

H 

H 

**B** 

**C** 

**D** 

**E** 

**F** 

**G** 

**H** 

**I** 

**L** 

**M** 

**H** 

**==> picture [4 x 1] intentionally omitted <==**

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for semiconductor clip-mounting 

**K** 

**art. no.** [mm] Rth [K/W] re ~~a~~ **SK 129 25,4 ...** a TO 220 25.4 7.8 ~~a~~ **SK 129 38,1 ...** TO 220 38.1 6.5 ~~a~~ **SK 129 50,8 ...** a TO 220 50.8 5.3 a **SK 129 63,5 ...** Ra TO 220 63.5 4.5 **please indicate: ... mouting method STC =with solder pins STIC =with solder pins and insulating washer STCB=with threaded bolts M 3, brass P** = raised retaining stud, **E** = mounting method special lengths and drillings on request **surface treatment:** black anodised for semiconductor screw-mounting [ere | rHali-es ra Le» ... STS .. STIS ... STSB **art. no.** [mm] Rth [K/W] ee **SK 129 25,4 ...** TO 220/ SOT 32/ TO 3 P 25.4 7.8 es a **SK 129 38,1 ...** TO 220/ SOT 32/ TO 3 P 38.1 6.5 a **SK 129 50,8 ...** TO 220/ SOT 32/ TO 3 P 50.8 5.3 a **SK 129 63,5 ...** a TO 220/ SOT 32/ TO 3 P 63.5 4.5 **please indicate: ... mouting method STS =with solder pins STIS =with solder pins and insulating washer STSB=with threaded bolts M 3, brass** 

**P** = raised retaining stud, **E** = mounting method special lengths and drillings on request **surface treatment:** black anodised 

for semiconductor screw-mounting 

**P** = raised retaining stud, **E** = mounting method special lengths and drillings on request **surface treatment:** black anodised 

**H** 

**H Heatsinks with threaded rail** ➔ **A 90 Attachable heatsinks for TO-cases** ➔ **A 91 H A 99 Profiles for PCB components** ➔ **A 89 Mounting for TO 3 angle** ➔ **A 121 Retaining springs for transistors** ➔ **A 111 – 116 Silicone wafers** ➔ **E 2 – 4 Order example** ➔ **A 21 Mica wafers** ➔ **E 11** 

**N** 

**H** 



## Links

- [View this product on Novapart](https://novapart.co/products/SK%20129%2025,4%20STS%20SOT%2032/heat-sink-extruded-pcb-mount-78-c-w-sot-32-to-3p)
- [Request a quote for this part](https://novapart.co/quote/)
- [Supplier page](https://es.farnell.com/fischer-elektronik/sk-129-25-4-sts/heat-sink-extruded-pcb-mounting/dp/1319810)
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