Microchip Technology SMCJ28AE3/TR13, Zener TVS diode, unidirectional, 1500W peak pulse power, 28V reverse standoff, DO-214AB (SMC) package, surface mount, tape and reel.
| Parameter | Value |
|---|---|
| Type | Zener |
| Mounting | Surface Mount |
| Voltage - breakdown | 31.1V |
| Voltage - clamping (Max) @ ipp | 45.4V |
| Voltage - reverse standoff | 28V |
| Current - peak pulse (10/1000μs) | 33A |
| Power - peak pulse | 1500W (1.5kW) |
| Power line protection | No |
| Operating temperature | -65°C~150°C(TJ) |
| Package | Tape & Reel (TR) |
| Applications | General Purpose |
| Case | DO-214AB, SMC |
| Unidirectional channels | 1 |
The SMCJ28AE3/TR13 is a unidirectional Zener TVS diode from Microchip Technology, rated for 1500W peak pulse power (10/1000µs waveform) with a 28V reverse standoff voltage. That 1500W rating means it can absorb a 33A transient pulse before the clamping voltage hits 45.4V — a solid margin for protecting 24V DC rails in industrial or telecom gear where the nominal bus sits at 28V or below.
The SMCJ28AE3/TR13 is rated for 1500W peak pulse power under the 10/1000µs waveform. This is the standard 1.5kW rating for the SMCJ family, suitable for clamping high-energy transients on 24V DC rails.
Yes, it has one unidirectional channel. It clamps positive overvoltage transients relative to ground; for negative-going spikes you would need a series blocking diode or a bidirectional TVS.
The SMCJ28A is the base part number without the - lead-free finish suffix or the /TR13 reel packaging code. Electrically they are identical: same 1500W peak pulse power, same 28V reverse standoff, same unidirectional Zener construction. The - suffix on the SMCJ28AE3/TR13 confirms RoHS compliance; the /TR13 suffix specifies 13-inch tape-and-reel delivery. If your BOM calls for SMCJ28A, the SMCJ28AE3/TR13 is a drop-in replacement as long as you can accept the lead-free finish and the reel format.