AEC-Q101 TVS for 12V/24V automotive bus protection
The 1.5SMC11CAHM3_A/H: It clamps transients on 9.4V nominal rails — the reverse standoff voltage — making it a fit for 12V automotive power buses and telecom line protection where the working voltage stays under that threshold. The single bidirectional channel means one part protects both polarities on AC-coupled or floating signal lines.
Clamping voltage and peak current — the protection envelope
This 6.2V clamp-to-standoff margin is the headroom the downstream IC's absolute-maximum rating must survive — a 24V-rated ECU input has margin; a 12V-rated sensor supply may not.
Active lifecycle and sourcing posture
The base product number 1.5SMC11 covers the unidirectional and bidirectional variants across the voltage range. The HM3 suffix denotes the AEC-Q101 automotive grade and the lead-free / RoHS-compliant finish.