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Special shapes for high power/performance natural convection din
Pencom also offers special shapes for high power/performance natural convection din. Pencom's design utilizes the full allowed profile, fin surfaces are specially designed for natural convection service achieving maximum thermal performance. These design principals can be applied directly, achieving specific thermal performance levels for similar shaped heat sinks. See the table for two shapes that can be used for thermal requirements of 1.0 °C/W and 0.8 °C/W service in natural convection. These performance levels can be achieved by using the Pencom design principles for natural convection service.
The current DIN rail heat sink designs fall far short of the Pencom proprietary design in the area of thermal performance. A typical THETAsa is 2.69 °C/W, this is shown in the following comparative conductive temperature plots for a nominal heat load of 10 watts per inch of length. Please note how much less the optimized heat sink design heats up to dissipate the same heat load in a 55°C ambient [ 39° for the PENCOM design vs. 67°C for the current design].
Advantages
- Optimum natural convection thermal performance for extruded shape envelope (width and height)
- Standard parts have extruded slot on din mounting end for threaded attachment of spring plate
- Standard parts are black anodized
- Standard length is 3.00" (76.1mm)
- Thermal performance is improved over current designs, smaller shapes will be able to support higher performance switches
- Pencom will customize the device mounting hole pattern to meet your particular requirements
- Parts are designed to fit next to each other with no lost din rail space
- Drawings for available are device hole patterns for any of the standard sizes
- Use of oriented fiber graphite interface pad for maximum base spreading when electrical isolation is not required (Thmg. Tgon 820AI)
- Standard commercial tolerances please specify your needs if flatness requirements are .004 or lower
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