Elmo BUT- X/YYY, DRA- X/YY manual Butterfly, Thermal Data, Heat Dissipation Data

Dragonfly/ Butterfly Installation Guide	Installation
MAN-DRBUIG (Ver. 1.1)

3.10Heat Dissipation

3.10.1Butterfly

3-12

The best way to dissipate heat from the Butterfly is to mount it so that its heatsink faces up. For best results leave approximately 10 mm of space between the Butterfly's heatsink and any other assembly.

3.10.1.1 Thermal Data

•Heat dissipation capability (θ): Approximately 10 °C/W.

•Thermal time constant: Approximately 240 seconds (thermal time constant means that the Butterfly will reach 2/3 of its final temperature after 4 minutes).

•Shut-off temperature: 86 °C – 88 °C (measured on the heatsink)

3.10.1.2 Heat Dissipation Data

Heat Dissipation is shown in graphically below:

				ButterflyWhistle - 60 Series Power Dissipation
															50V
	10.0														40V
	9.0														30V
															20V
	8.0
(Watts
	7.0														External
Dissipation
	6.0														Heatsink
	5.0	Standard 40			°C Ambient Temp.										Required
	4.0
Power															Heatsink
	3.0
															not
	2.0														Required
	1.0
	0.0
		0	0	1	2	3	3	4	5	6	6	7	8	9	9
			. . .				. . .				. . .				.
			7	5	2		7	5	2		7	5	2		7
			5		5		5		5		5		5		5
							Peak Current (A)