1500 W peak pulse in a DO-214AB SMC
The 1.5SMC170A TR13 PBFREE from Central Semiconductor is a 1500 W (1.5 kW) Zener-type TVS diode in a DO-214AB (SMC) surface-mount package, designed to clamp transients on general-purpose DC power and signal lines. Its 145 V reverse standoff voltage means the protected rail can run at 145 V DC without the TVS conducting leakage, while the minimum breakdown of 161.5 V ensures the device starts clamping before the voltage exceeds the circuit's tolerance. The 234 V maximum clamping voltage at a peak pulse current of 6.4 A (10/1000 µs waveform) defines the voltage the downstream components must survive — a critical parameter for selecting this part over a lower-clamp alternative when the protected circuit has a hard voltage ceiling.
The part is a unidirectional (single-channel) Zener TVS with no power-line protection feature — intended for DC rail and signal-line clamping where polarity is fixed. The 'PBFREE' suffix indicates RoHS-compliant, lead-free construction.