1N5221B to 1N5281B

      A surface mount equivalent to the popular JEDEC registered 1N5221B to 1N5281B  for 2.4 to 200 volts in standard 5% tolerances provided by the 1N5221BUR thru 1N5281BUR series of 0.5 watt ZenerVoltage, as well as tighter tolerances identified by different suffix letters on the part number. An internal-metallurgical-bond option by adding a "-1" suffix are also available by them. Microsemi also offers many other Zener products to meet higher and lower power applications.
      The first characteristic of 1N5221B to 1N5281B is surface mount equivalents to the JEDEC registered 1N5221 thru 1N5281B  series, the second point is DO-7 or DO-35 glass body axial- leaded Zener equivalents also available per JEDEC registration (see separate data sheet for part numbers 1N5221 thru 1N5281B series, the third point is RoHS Compliant devices available by adding "e3" suffix, the forth point is hermetically sealed surface mount package, and the last point internal metallurgical bond option available by adding a"-1" suffix (see separate data sheet for same part numbers with "-1" suffix).
      When use 1N5221B to 1N5281B, must attention to its limitations. For example operating and storage temperature: -65ºC to +175ºC, Steady-State Power: 0.5 watts at end cap temperature TEC 100ºC or ambient temperature TA25ºC when mounted on FR4 PC board as described for thermal resistance above (see Figure 2 for derating), Solder Temperatures: 260 ºC for 10 seconds (max), Thermal Resistance: 150ºC/W junction to end cap and 300ºC/W junction to ambient when mounted on FR4 PC board (1 oz Cu) with recommended footprint, and the Forward voltage @200 mA: 1.1 volts (maximum).