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MIL-PRF-19500-124 Semiconductor Device, Diode, Silicon, Voltage Regulator Types 1N2970B Through 1N2977B, 1N2979B, 1N2980B, 1N2982B, 1N2984B Through 1N2986B, 1N2988B Through 1N2993B, 1N2995B, 1N2997B, 1N2999B Through 1N3005B, 1N3007B, 1N3008B, 1N3009B, 1N3011B, 1N3012B, 1N3014B, 1N3015B, Plus Rb Types, 1N3993A Through 1N3998A, And Ra Types, Jan, Jantx, Jantxv, And JansThis specification covers the performance requirements for 10 watt, silicon voltage regulator diodes: A and B type \(standard polarity\); RA and RB type \(reverse polarity\). Four levels of product assurance are provided for each device type as specified in MIL–PRF–19500.

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MIL�PRF�19500/124L
6.5 Symbols used in this specification sheet. The following symbols are used in this specification sheet. The
definition associated with the symbol shall be as defined in MIL�PRF�19500 or herein.
IF
Forward current, DC value, no alternating component.
IR1
Reverse current.
IR3
Reverse current, dc max (after life test).
Isig
Detector signal current.
IZSM
Surge current.
IZ
Maximum dc current.
IZK
Regulator or reference current, dc near breakdown knee.
IZM
Regulator or reference current, dc maximum rated current.
IZT
Test current.
PT
Total power dissipation, all terminals.
RΘJC
Thermal resistance.
TA
Ambient or free air temperature.
TC
Case temperature.
TJ
Junction temperature.
TSTG
Storage temperature.
VF
Forward voltage.
VR
Reverse voltage.
Vz
Regulator voltage.
Vz(reg)
Voltage regulation.
ZZ
Impedance.
ZZK
Impedance, knee.
6.6 Changes from previous issue. The margins of this specification are marked with vertical lines to indicate
where changes from the previous issue were made. This was done as a convenience only and the Government
assumes no liability whatsoever for any inaccuracies in these notations. Bidders and contractors are cautioned to
evaluate the requirements of this document based on the entire content irrespective of the marginal notations and
relationship to the last previous issue.
Custodians:
Preparing activity:
Army � CR
DLA � CC
Navy � EC
Air Force � 85
(Project 5961�2011�006)
NASA � NA
DLA � CC
Review activities:
Army � AR, MI, SM
Navy � AS, MC
Air Force � 19, 99
NOTE: The activities listed above were interested in this document as of the date of this document. Since
organizations and responsibilities can change, you should verify the currency of the information above using the
ASSIST Online database at https://assist.daps.dla.mil.
13



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