IN5518BUR-1

Surface mount equivalent to JEDEC registered 1N5518 thru 1N5546 series
Internal metallurgical bond with the "-1" suffix
Also available in JAN, JANTX, and JANTXV qualifications per MIL-PRF-19500/437 by adding the JAN, JANTX, or JANTXV prefixes to part numbers for desired level of screening;                        (e.g.JANTX1N4099UR-1, JANTXV1N4109CUR-1, etc.)
Nonbonded types also available without the "-1" suffix for both the axial and surface mount packages 
DO-7 or DO-35 glass body axial-leaded Zener equivalents also available per JEDEC registration with part numbers 1N5518 thru 1N5546 on separate data sheets

Regulates voltage over a broad operating current and temperature range
  Extensive selection from 3.3 to 33 V
Standard voltage tolerances are plus/minus 5% with a "B" suffix, e.g. 1N5518BUR-1, etc. 
Tight tolerances available in plus or minus 2% or 1% with C or D suffix respectively, e.g. 1N5518CUR-1, 1N5518DUR-1, etc.
  Hermetically sealed surface mount package
  Nonsensitive to ESD per MIL-STD-750 Method 1020
  Minimal capacitance (see Figure 3)
Inherently radiation hard as described in Microsemi MicroNote 050  
 

*  Operating and Storage temperature:  -65^oC to +175^oC 
*  Thermal Resistance:  100 ^oC /W junction to end cap, or 250C/W junction to ambient when mounted on FR4 PC board (1 oz Cu) with recommended footprint (see last page) 
*  Steady-State Power:  0.5 watts at end cap temperature TEC < 125 ^oC  or at ambient TA < 50^oC when mounted on FR4 PC board as described for thermal resistance above (see Figure 2  for derating)
*  Forward voltage @200 mA:  1.1 volts  
*  Solder Temperatures:  260 C for 10 s (max) 

The IN5518BUR-1 series of  0.5 watt glass surface mount Zener voltage regulators provides a selection from 3.3 to 33 volts in standard 5% tolerances as well as tighter tolerances identified by different suffix letters on the part number.  These have an internal-metallurgical-bond option as identified by the "1" suffix.  This internally bonded Zener package construction  is also in  JAN, JANTX, and  JANTXV military qualifications.  Microsemi also offers numerous other Zener products to meet higher and lower power applications.