TOREX SOT-223 Technical data

● SOT-223 Power Dissipation

Power dissipation data for the SOT-223 is shown in this page.
The value of power dissipation varies with the mount board conditions.
Please use this data as one of reference data taken in the described condition.

1. Measurement Condition (Reference data)
Condition: Mount on a board

Ambient: Natural convection

Soldering: Lead (Pb) free

Board: Dimensions 40 x 40 mm (1600 mm2 in one side)

Copper (Cu) traces occupy 50% of the board area
In top and back faces
Package heat-sink is tied to the copper traces

Material: Glass Epoxy (FR-4)

Thickness: 1.6 mm

Through-hole: 4 x 0.8 Diameter

2. Power Dissipation vs. Ambient temperature

Board Mount (Tj max = 125℃)

25
85

1600
1400
1200
1000

800
600
400
200

Power Dissipation Pd（mW）

0

25 45 65 85 105 125

Ambient Temperature Ta（℃）

Pd vs Ta

1500

600

Evaluation Board (Unit: mm)

Thermal Resistance(℃/W)Power Dissipation Pd（mW）Ambient Temperature（℃）

66.67