1N5221B-1 thru 1N5281B-1 Available on commercial .
1N5271BUR-1 - METALLURGICALLY BONDED GLASS SURFACE MOUNT 500mW ZENERS
1N5271B-1 - ZENER DIODES
1N5271B - ZENER DIODES
1N5271B - Zener Diodes
1N5271B - SILICON ZENER DIODES
1N5271B - Zener Diode
1N5271B - SILICON PLANAR ZENER DIODES