Transient protection envelope: 1500W peak pulse, 70.1V clamp
The 1.5SMB51CA: The 48.5V minimum breakdown voltage ensures the device triggers before the protected circuitry sees damaging overvoltage, while the 43.6V reverse standoff voltage allows continuous operation on a 43.6V DC bus without leakage or degradation.
DO-214AA SMB footprint and assembly fit
Housed in the DO-214AA (SMB) surface-mount package, the 1.5SMB51CA uses the standard JEDEC footprint for this power level — compatible with reflow soldering and automated pick-and-place assembly without special handling. The -65°C to 150°C junction temperature range covers outdoor telecom cabinet deployment and industrial enclosures where ambient temperatures swing widely.
Telecom application fit and sourcing posture
Designated for Telecom applications, this TVS diode is suited for protecting communication line interfaces — RS-485, Ethernet PHY, T1/ — from lightning-induced surges and ESD events per Telcordia GR-1089 or ITU-T K.20/K.21 recommendations.