I verified the MCC datasheet pinout, but couldn’t update the project because you have comment-only access.
- Pin 1: Passive — Protected Line 1; 12 V standoff toward common Pin 3
- Pin 2: Passive — Protected Line 2; 12 V standoff toward common Pin 3
- Pin 3: Passive — Common/reference; 7 V standoff toward Pins 1 or 2
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