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Diodes Incorporated SMAJ78AQ-13-F — Circuit Protection

SMAJ78AQ-13-F Diodes Inc TVS, 78V Standoff, 400W, AEC-Q101

MPNSMAJ78AQ-13-F
Active

Diodes Incorporated SMAJ78AQ-13-F, Automotive AEC-Q101 Zener TVS Diode, 400W Peak Pulse Power, 78V Reverse Standoff, 126V Clamping, Unidirectional, DO-214AC SMA Package, Tape & Reel.

$0.1049Ref. price · indicative, final on quote
Diodes Incorporated SMAJ78AQ-13-F datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

SMAJ78AQ-13-F specifications
ParameterValue
TypeZener
SeriesAutomotive, AEC-Q101
MountingSurface Mount
Voltage - breakdown86.7V
Voltage - clamping (Max) @ ipp126V
Voltage - reverse standoff78V
Current - peak pulse (10/1000μs)3.2A
Power - peak pulse400W
Power line protectionNo
Operating temperature-55°C~150°C(TJ)
PackageTape & Reel (TR)
ApplicationsAutomotive
CaseDO-214AC, SMA
Unidirectional channels1

Product details

What the clamping and breakdown specs mean for your protection threshold

The SMAJ78AQ-13-F: Breakdown occurs at a minimum of 86.7 V, and the diode clamps the transient to 126 V maximum at the rated 3.2 A pulse current — this 126 V ceiling must stay below the downstream component's absolute maximum rating (e.g., a 100 V-rated MOSFET would need a lower-clamping TVS or a series resistor to share the voltage stress).

Package and board integration for the DO-214AC SMA footprint

Housed in the DO-214AC (SMA) package with a surface-mount footprint, the SMAJ78AQ-13-F mates with standard SMA solder pads — the cathode band identifies the unidirectional orientation, and the package's low profile suits dense automotive ECU layouts.

Frequently asked questions

Where can I buy SMAJ78AQ-13-F and how do I get a price?

Submit a request with your target quantity and delivery timeline for a confirmed price and lead time.

What is the closest pin-compatible alternative to SMAJ78AQ-13-F in this Circuit Protection family?

The SMAJ78AQ-13-F is a unique AEC-Q101 qualified variant within Diodes Incorporated's SMAJ series; a non-automotive grade SMAJ78A (without the 'Q' suffix) may share the same DO-214AC footprint but lacks the automotive qualification and may have different test limits.

What compliance documentation does Diodes Incorporated provide for SMAJ78AQ-13-F?

As an AEC-Q101 qualified device, Diodes Incorporated typically provides a PPAP (Production Part Approval Process) package and a PCN (Product Change Notification) service. RoHS and REACH compliance declarations are standard for this series.