1N4057 thru 1N4058A

      The 1N4057 thru 1N4085A series of Zero-TC Reference Diodes provides a wide selection of nominal voltages ranging from 12.4 V to 200 V with low temperature coefficients of either 0.005%/C or 0.002%/oC for minimal voltage change with temperature. 1N4057 thru 1N4085A  is achieved at the specified test currents of 10.0 mA for the lower voltages 12.4 V to 33 V, a specified test current of 7.5 mA for the next higher voltage grouping of 37 V to 100 V, 5.00 mA for 68 V to 100 V, and 2.5 mA for the highest voltage group 105 V to 200 V. These axial-leaded reference diodes 1N4057 thru 1N4085A  are packaged in three different plastic body package configurations progressively increasing in size with the voltage.Microsemi also offers numerous other Zener Reference Diode products in smaller packages for lower voltages in popular JEDEC registrations.
      The featurs of 1N4057 thru 1N4085A are Reference Voltage 12.4V to 200V;Standard voltage tolerance of +/-5%;Maximum temperature coefficient selections available of 0.005%/oC and 0.002%/oC;Options for screening in accordance with MIL-PRF-19500 for JAN, JANTX, JANTXV, and JANS are available by adding MQ, MX, MV, or MSP prefixes respectively to part numbers
       Voltage measurements to be performed 15 seconds after application of dc current.
      The 1N4057 through 1N4085 series is specified over the temperature range -55oC to +100oC with measurements made at -55oC, +100oC, and at the reference temperature +25oC. The maximum voltage change over the range -55oC to +25oC and +25oC to +100oC for this series is limited to the values (expressed in mV/oC) shown in the table. These values are computed by considering the temperature coefficient to be an average over the temperature range. For example, there is an 80oC change in temperature from -55oC to +25oC. At an average temperature coefficient of 0.005%/oC, the maximum percentage change in voltage would be: 80oC x 0.005%/oC or 0.4%. For the 1N4057, having a nominal zener voltage of 12.4 volts, the maximum allowable voltage change would be: 0.4% of 12.4 volts or 49.6 millivolts.
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