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onsemi P6SMB27CAT3 — Circuit Protection

P6SMB27CAT3 onsemi Zener TVS – Obsolete, AEC-Q101

MPNP6SMB27CAT3
Obsolete

onsemi P6SMB27CAT3, Zener TVS Diode, Bidirectional, 600W Peak Pulse, 23.1V Reverse Standoff, DO-214AA (SMB), Automotive Grade AEC-Q101

onsemi P6SMB27CAT3 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

P6SMB27CAT3 specifications
ParameterValue
TypeZener
SeriesAutomotive, AEC-Q101
MountingSurface Mount
Voltage - breakdown25.7V
Voltage - clamping (Max) @ ipp37.5V
Voltage - reverse standoff23.1V
Current - peak pulse (10/1000μs)16A
Power - peak pulse600W
Power line protectionNo
Capacitance @ frequency370pF @ 1MHz
Operating temperature-65°C~150°C(TJ)
PackageTape & Reel (TR)
ApplicationsAutomotive
CaseDO-214AA, SMB
Bidirectional channels1

Product details

Automotive-grade Zener TVS – 600 W peak pulse, 23.1 V standoff

It is qualified to AEC-Q101, making it suitable for automotive applications where documented reliability and transient protection on 24 V nominal power rails or signal lines are required. The bidirectional configuration protects both polarities with a single device, simplifying layout on a 23.1 V rail where reverse-voltage events are possible.

Capacitance is 370 pF at 1 MHz – a consideration for high-speed signal lines where added capacitive loading may affect signal integrity.

Clamping voltage and peak current – 37.5 V at 16 A

The maximum clamping voltage of 37.5 V at 16 A peak pulse current defines the voltage the protected circuitry must survive during a transient event. For a 23.1 V nominal rail, this provides a 14.4 V headroom above the working voltage. The breakdown voltage range starts at 25.7 V minimum, ensuring the device begins conducting before the rail exceeds safe limits.

Frequently asked questions

How can I order P6SMB27CAT3 or check availability?

The P6SMB27CAT3 is obsolete per onsemi's lifecycle status. We can source it through independent distribution – submit an RFQ with your target quantity and we will confirm current availability and pricing at quote time.

What is the replacement for P6SMB27CAT3?

onsemi has not published an official successor for this order code. For a drop-in functional equivalent, look at the P6SMB series with the same standoff voltage (23.1 V) and bidirectional configuration in DO-214AA – confirm the breakdown and clamping specifications match your design. We can help cross-reference against your BOM.

What is the difference between P6SMB27CAT3 and SMBJ27CA?

Both are bidirectional Zener TVS diodes in DO-214AA with a 23.1 V standoff. The P6SMB27CAT3 is AEC-Q101 qualified (automotive grade) and rated for 600 W peak pulse, while the SMBJ27CA is typically a commercial-grade part rated for 600 W as well. The key delta is the automotive qualification – the P6SMB27CAT3 carries documented AEC-Q101 reliability data that the SMBJ27CA may lack.