FK 201SA-3

Heat Sink, TO-3, 6 °C/W, TO-3, 45 mm, 25.4 mm, 45 mm

⚠️ Reference pricing provided. In case of supply shortages, we will connect you with our trusted procurement partners to ensure your project's continuity.

Manufacturer: FISCHER ELEKTRONIK
Product type: Natural Convection Heat Sinks
Thermal Resistance:6°C/W; Packages Cooled:TO-3; External Width - Metric:45mm; External Height - Metric:25.4mm; External Length - Metric:45mm; External Diamete; Available until stocks are exhausted
SVHC: No SVHC (25-Jun-2025)
Product Range: -
Packages Cooled: TO-3
Heat Sink Material: Aluminium
Thermal Resistance: 6°C/W
External Width - Metric: 45mm
External Height - Metric: 25.4mm
External Length - Metric: 45mm
External Width - Imperial: 1.77"
External Diameter - Metric: -
External Height - Imperial: 1"
External Length - Imperial: 1.77"
External Diameter - Imperial: -

Delivery and price
Units per pack	100
Price	1.27 €
Current stock	200+
Lead time	30 days

Datasheet

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

|**art. no.**<br>**FK 318 SA**<br>**FK 254 SA**<br>**FK 191 SA**<br>**FK 127 SA**<br>ee <br>Po<br>Po<br>es <br>ee|Rth[K/W]<br>[mm]<br>**art. no.**<br>Rth[K/W]<br>[mm]<br>4.8<br>31.8<br>TO 3<br>**FK 318 SA-3**<br>4.8<br>31.8<br>without<br>5.8<br>25.4<br>TO 3<br>**FK 254 SA-3**<br>5.8<br>25.4<br>without<br>6.6<br>19.1<br>TO 3<br>**FK 191 SA-3**<br>6.6<br>19.1<br>without<br>8.0<br>12.7<br>TO 3<br>**FK 127 SA-3**<br>8.0<br>12.7<br>without<br> ee ~~e~~e<br>Se<br> a eses<br>esrs|
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**material:** die-cast aluminium **surface treatment:** black lacquered 

**art. no.** [mm] Rth [K/W] **art. no.** [mm] Rth [K/W] ee ee **FK 201 SA** without 25.4 6 **FK 202 SA** without 12.7 8 ee a es **FK 201 SA 3** TO 3 25.4 6 **FK 202 SA 3** TO 3 12.7 8 ee ee es ns **FK 201 SA CB** CB 25.4 6 **FK 202 SA CB** CB 12.7 8 Po & L(TO 3-SOT 9 +TO 66 - SOT 32 - 10220) Daye 16,9 4 sia = J13 i I — a ee ar Uf Aj i PPP I 7 SS 1,5 413 3,6 **art. no.** [mm] Rth [K/W] eeeS ~~a~~ **FK 205 SA L** ~~a~~ L 31.8 9.0 ~~a~~ **FK 206 SA L** L 25.4 10.5 **FK 207 SA L** L 19.1 12.0 ~~es~~ a **FK 208 SA L** L 12.7 14.0 es **material:** aluminium **surface treatment:** black anodised 

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**H Attachable heatsinks** ➔ **C 10 – 14 Snap rivet** ➔ **E 34 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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Updated at April 29, 2026

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