Protection ratings for a 12V rail
The SMBJ12AONT3: This is a 600W peak pulse power TVS diode (10/1000µs waveform) with a 12V reverse standoff voltage — it sits across a 12V rail and stays out of the circuit until a transient exceeds 13.2V breakdown.
SMBJ12AONT3 onsemi TVS Diode – Obsolete
MPNSMBJ12AONT3
Obsolete
onsemi SMBJ series, Type Zener, 600W peak pulse power, 12V reverse standoff, 19.9V clamping, unidirectional, DO-214AA (SMB) surface mount, Tape & Reel
$0.2500Ref. price · indicative, final on quote
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026
Specifications
| Parameter | Value |
|---|---|
| Type | Zener |
| Series | SMBJ |
| Mounting | Surface Mount |
| Voltage - breakdown | 13.2V |
| Voltage - clamping (Max) @ ipp | 19.9V |
| Voltage - reverse standoff | 12V |
| Current - peak pulse (10/1000μs) | 30.2A (8/20µs) |
| Power - peak pulse | 600W |
| Power line protection | No |
| Operating temperature | -65°C~150°C(TJ) |
| Package | Tape & Reel (TR) |
| Applications | General Purpose |
| Case | DO-214AA, SMB |
| Unidirectional channels | 1 |
Product details
Frequently asked questions
Where can I buy SMBJ12AONT3?
The SMBJ12AONT3 is obsolete, so it is not stocked in volume at franchised distributors. It is available through independent surplus channels — we can source it against your BOM quantity. Submit an RFQ for current availability and pricing.
What is the replacement for SMBJ12AONT3?
There is no official successor listed by onsemi for the SMBJ12AONT3. A functionally equivalent TVS with the same 12V standoff, 600W rating, and DO-214AA package from another manufacturer may fit — confirm the clamp voltage and breakdown tolerance against your design before substituting.
Is SMBJ12AONT3 the same as SMBJ12A?
The SMBJ12A is the base part number for the same 12V TVS in the SMBJ series. The SMBJ12AONT3 suffix indicates a specific packaging option (Tape & Reel). Electrically they are identical — the difference is the reel format for automated assembly.