View mmcz5221bpt-thru-mmcz5270bpt datasheet:

MMCZ5221BPT CHENMKO ENTERPRISE CO.,LTD THRU SURFACE MOUNT ZENER SILICON PLANAR POWER ZENER DIODES MMCZ5270BPT VOLTAGE RANGE 2.4V TO 91V FEATURE * Small surface mounting type. (SC-59/SOT-346) * High temperature soldering type. * ESD rating of class 3(>16 kV) per human body model. SC-59/SOT-346 * Silicon planar zener diodes. * Silcon-oxide passivated junction. * Low temperature coefficient voltage (2) * 225 mW Rating on FR-4 or FR-5 Board 0.95 1.9±0.2 2.9±0.2 MECHANICAL 0.95 (3) * SC-59/SOT-346 Packaging. (1) 0.1 * Mounting position: Any. 0.4±0.05 0.2 1.6± 0.1 1.1±0.2 0.1 0.1 0.15±0.1 0.06 0.06 0.8±0.1 0~0.1ı 0.3~0.6 (2) CIRCUIT (1) 2.8±0.2 (3) Dimensions in inches and (millimeters) SC-59/SOT-346 MAXIMUM RATINGES ( At TA = 25oC unless oth