Can SOT-223 chips or any type of DC transistors receive 12 V from a 19 Ah lead-acid car battery? Will the 19 Ah current kill the DC transistors?

For example, using an AMS1117 to produce 3.3 V. The tech specs indicate a maximum input voltage of 15 V but nothing on maximum input current.


  • 4
    \$\begingroup\$ The Ah number specifies capacity, not current. The load will determine the current given a voltage. \$\endgroup\$
    – ocrdu
    May 14 at 7:25
  • 3
    \$\begingroup\$ Current flow is determined by load, not source. Maximum input current is simply maximum load current. \$\endgroup\$ May 14 at 7:26
  • \$\begingroup\$ What’s your load? \$\endgroup\$
    – winny
    May 14 at 10:48
  • 1
    \$\begingroup\$ The answer to topic asked is "yes", but it sounds like that's not what you wanted to know. So please edit what you really want to ask and know. \$\endgroup\$
    – Justme
    May 14 at 11:07


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