5.0SMDJ26CA Copy MPN

The 5.0SMDJ26CA is a bidirectional TVS Zener diode in the DO-214AB (SMC) package, standoff rated 26 V — the CA suffix confirms it clamps both polarities, so a single device protects a differential telecom signal pair without requiring two diodes back-to-back. At 5000 W peak pulse capacity (10/1000 µs waveform), the 42.1 V maximum clamping voltage sets the let-through ceiling the downstream circuit sees during a surge — that ceiling, not the standoff, is what the protection design lives or dies by. Peak pulse current is 119 A at the 10/1000 µs spec wave — telecom line cards often face shorter-duration ringing transients, and the diode's response time keeps the clamping action ahead of the event, but confirm the event energy at your port matches the 5 kW/10/1000 µs derating curve before locking in the BOM. Junction temperature runs to 150°C max — the 185°C span from -65°C gives headroom for base-station outdoor enclosures and power-supply rail protection that sees self-heating during clamping events.