Features: • Electricallysimilar to the JEDEC registered 1N4728 thru 1N4764zener series
• Zener voltagesavailable 3.3Vto 100V
• Standard voltage tolerances are +/- 5% with"A" suffix and 10 % with no suffix identification
• Tight tolerance available in plus or minus 2%or 1% withC or D suffixrespectively
• Options for screening inaccordance with MIL-PRF-19500 for JAN,JANTX, JAN TXV, and JANS are availabe byadding MQ, MX, MV, or MSP prefixes respectively
to part numbers.
• Surface mount equivalents alsoavailable as SMAJ4728A toSMAJ4764A and SMAJ4728A to SMAJ4764A
• Plastic bodyaxial-leaded Zener equivalents are alsoavailable as 1N4728A to 1N4764A
Application•
Regulates voltage over a broad operating current and temperature range
• Wide selection from 3.3 to 100 V
• Leadless package for surface mounting
• ideal for high density mounting
• Nonsensitive to ESD
• Hermetically sealed glass package
• Specified capacitance (see Figure 2)
• Inherently radiation hard per MicroNote 050
Specifications• Power dissipati on at 25C: 1.0 watts (also see derating in Figure 1).
• Operating and Storage temperature: -65ºC to +175ºC
• Thermal Resistance: 50 ºC/W junction to end cap, or 130ºC/W junction to ambient when mounted on FR4 PC board recommended footprint (see last page)
• Steady-State Power: 1.00 watts at TEC < 125oC, or 1.00 watts at TA < 45ºC when mounted on FR4 PC board and recommended footprint as described for thermal resistance (also see Figure 1)
• Forward voltage @200 mA: 1.2 volts (maximum)
• Solder Temperatures: 260 ºC for 10 s (max)
DescriptionThis surface scthe 1N4728A thru 1N4764A 1N4728URregistration in the DO-41 equivalent package except that it meets the JEDEC surface mount outline DO-213AB. The 1N4728UR is an ideal selection for applications of high density and low parasitic requirementsfor voltage regulation. Standard voltage toleranceis +/- 5% with tighter tolerances available down to 1%. With its glass hermetic qualities, it may also be used for high reliability applicationswhen required by a source control drawi
1N4728UR Data Sheet
