Automotive-grade transient suppression for 28 V rails
The SMCJ28AQ-13-F: It clamps transients to 45.4 V maximum at 33 A peak pulse current, covering the 24 V nominal automotive bus against load-dump and inductive kickback. The -55°C to 150°C junction temperature range covers the full automotive ambient envelope with margin for self-heating.
Housed in the DO-214AB (SMC) package, the SMCJ28AQ-13-F is a surface-mount device with a standard JEDEC footprint. The SMC body handles the 1500 W pulse without exceeding the junction temperature limit — the copper pad area under the cathode tab on the PCB sets the thermal resistance, so the board layout directly affects the derating margin at high ambient.
Sourcing and compliance posture
AEC-Q101 qualification is the primary compliance document for automotive programs. The base product number is SMCJ28; the 'AQ' suffix marks the automotive-grade variant. No RoHS/REACH certificate is in this record, but Diodes Incorporated typically provides compliance declarations on request.