Where this TVS fits in the board
The 1.5SMC110A-E3/57T: It clamps transients at 152V max and has a 94V reverse standoff — meaning it stays off the bus below 94V and only conducts when a surge pushes the line above that threshold. This part is for general-purpose circuit protection on DC power rails or signal lines that see occasional overvoltage spikes — think 48V telecom buses, 72V battery lines, or industrial sensor supplies. The 1500W peak pulse rating handles moderate-energy transients like inductive kickback or lightning-induced surges on outdoor cabling. Packaged in a DO-214AB (SMC) surface-mount case, it reflows on standard lead-free profiles and fits the same footprint as other SMC TVS diodes. The -65°C to 150°C junction temperature range covers both cold-start automotive and hot industrial enclosures.
Clamping voltage and peak current — the real selection numbers
If the downstream components have a 150V abs-max rating, this TVS will not protect them — the clamp voltage exceeds that ceiling. For a 100V-rated bus, the 152V clamp is safe as long as the transient energy stays within the 1500W envelope. The 105V minimum breakdown voltage means the diode starts conducting between 105V and the clamp level. A 94V standoff ensures no leakage at normal operating voltage, but a rail that rides at 100V DC will trigger the TVS into continuous conduction — not a fault condition, but the part will dissipate power and heat up. Match the standoff to the steady-state bus voltage with margin. No power line protection means this is not rated for direct AC mains or high-energy surge events like a lightning strike on a power distribution line. It is sized for secondary-side transients on DC buses or signal interfaces.
Active production and how to source it
Sourced through independent distribution channels against an RFQ.