100A 4000W High-Power Soft Start Circuit Power Board for Class A Amplifier Amp - AliExpress

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Mayitr 1pc Class A Power Amplifier Soft Start Delay Temperature Lightning Protection Board With Gas Discharge Tube 220v 100a - Home Theater Amplifiers - AliExpress

A Complete Guide to Design and Build a Hi-Fi LM3886 Amplifier - Circuit Basics

Buy Soft Start Module online

A Complete Guide to Design and Build a Hi-Fi LM3886 Amplifier - Circuit Basics

Power Supply Soft Start Relay, Relay 220v Current

Power Soft Start Amplifier, Soft Start Board Amplifier

DLHiFi 100A 4000W High Power Soft Start Circuit Board for Class A Amplifier Amp - AliExpress

$\theta_{sa} =\frac{[(T_{jmax}-T_{amb})-P_{dmax}(\theta_{jc}+\theta_{cs})]}{P_{dmax}}\\ \\T_{jmax}= Maximum\hspace{1mm}junction\hspace{1mm}temperature\hspace{1mm}\Rightarrow\hspace{1mm}150\hspace{1mm}^{\circ}C\hspace{1mm}(from\hspace{1mm}datasheet)\\ \\T_{amb}= Ambient\hspace{1mm}temperature\\ \\\theta_{jc}= Thermal\hspace{1mm}resistance\hspace{1mm}from\hspace{1mm}junction\hspace{1mm}to\hspace{1mm}case\\ \\\theta_{cs}= Thermal\hspace{1mm}resistance\hspace{1mm}from\hspace{1mm}case\hspace{1mm}to\hspace{1mm}heat\hspace{1mm}sink\\ \\P_{dmax}= Maximum\hspace{1mm}power\hspace{1mm}dissipation$

A Complete Guide to Design and Build a Hi-Fi LM3886 Amplifier - Circuit Basics

100a Soft Starter For Power Amplifier Preamplifier Class A Amplifier Audio Diy Heavy Duty Soft-start Delay Ac 150v-280v - Home Theater Amplifiers - AliExpress