600 W bidirectional clamp in DO-214AA
Its 140 V reverse standoff voltage means it sits across a 140 V DC rail or a 140 V AC line and stays off until a transient exceeds the 155 V minimum breakdown threshold. With a single bidirectional channel, one device clamps both positive and negative surges — useful for AC inputs, bipolar power rails, or signal lines where polarity isn't fixed.
Clamping voltage and peak current
When the transient hits, the SMBJ140CA clamps at a maximum of 227 V while conducting 2.65 A of peak pulse current (10/1000 µs). That 227 V ceiling is what the protected circuitry sees — if your downstream components are rated for 250 V or higher, this device gives adequate margin. The 2.65 A peak current rating tells you the surge energy the part can handle before the junction overheats; for a given system impedance, this translates into a maximum transient energy budget.
Active production, sourced per RFQ
Temperature range and rework note
Rated for junction temperatures from -55°C to 150°C, the SMBJ140CA fits industrial, telecom, and outdoor equipment where ambient heat or cold is a factor. The DO-214AA (SMB) package is a standard two-lead gull-wing — easy to hand-solder or hot-air rework. The cathode band is marked on the body; for a bidirectional device, orientation does not matter, but the marking still helps confirm the part identity on the reel.