The dissipation constant (δ) indicates the power necessary for increasing the temperature of the thermistor element by 1℃ through self-heating in a heat equilibrium.
Applying a voltage to a thermistor will cause an electric current to flow, leading to a temperature rise in the thermistor. This II intrinsic heating II process is subject to the following relationship among the thermistor temperature T₁, ambient temperature T₂, and consumed power P.

\[ \delta = \frac{P}{T_1 - T_2} \begin{pmatrix} mW / ℃ \end{pmatrix} \]

\[ *\begin{pmatrix} P=I^2 \cdot R=I \cdot V \end{pmatrix} \]

Measuring conditions for all parts in this catalog are as follows:

1. Room temp is 25℃
2. Axial and radial leaded parts were measured in their shipping condition.