MIL-PRF-19500/444N
3.3 Abbreviations, symbols, and definitions. Abbreviations, symbols, and definitions used herein shall be as
specified in MIL-PRF-19500 and as follows.
EC
End-cap.
τCL
Effective carrier lifetime.
UR
Surface mount case outline, round end-cap.
3.4 Interface and physical dimensions. Interface and physical dimensions shall be as specified in
MIL-PRF-19500 and figures 1, 2, 3, and 4 herein.
3.4.1 Lead finish. Lead finish shall be solderable in accordance with MIL-PRF-19500, MIL-STD-750, and herein.
Where a choice of lead finish is desired, it shall be specified in the acquisition document (see 6.2).
3.4.2 Diode construction. All devices (except UB version) shall be metallurgically bonded, double plug
construction in accordance with the requirements of MIL-PRF-19500. All glass diodes shall be designed with
sufficient thermal compensation in the axial direction to optimize tensile and compressive stresses. Dimensional
analysis is required of all materials used to achieve axial thermal compensation. Dimensional tolerances and
corresponding coefficient of thermal expansion (CTE) shall be documented on the DSCC Design and Construction
Form 36D and shall be approved by the qualifying activity to maintain qualification. Dimensional tolerances shall be
sufficiently tight enough to prevent excessive stresses due to the inherent CTE mismatch. The UB devices shall be
eutectically mounted and wire bonded in a ceramic package.
3.5 Electrical performance characteristics. Unless otherwise specified herein, the electrical performance
3.6 Electrical test requirements. The electrical test requirements shall be table I as specified herein.
3.7 Marking. Marking shall be in accordance with MIL-PRF-19500. Manufacturer's identification and date code
shall be marked on the devices. Initial container package marking shall be in accordance with MIL-PRF-19500. The
polarity shall be indicated with a contrasting color band to denote the cathode end. The prefixes JAN, JANTX,
JANTXV, and JANS can be abbreviated as J, JX, JV, or JS, respectively. The part number may be reduced to
J5711, JX5711, JV5711, or JS5711. No color coding shall be permitted for part numbering.
3.7.1 Polarity. The polarity of axial leaded devices shall be indicated with a contrasting color band to denote the
cathode end. No color coding will be permitted for the part number.
3.7.1.1 UB devices. `UB' devices do not require polarity marking.
3.7.2 UR devices. For `UR' version devices only, all marking, except polarity may be omitted from the body, but
shall be retained on the initial container. Polarity marking of `UR' devices shall consist, as a minimum, a band or
three contrasting dots spaced equally around the periphery of the cathode.
3.8 Workmanship. Semiconductor devices shall be processed in such a manner as to be uniform in quality and
shall be free from other defects that will affect life, serviceability, or appearance.
4. VERIFICATION
4.1 Classification of inspections. The inspection requirements specified herein are classified as follows:
a. Qualification inspection (see 4.2).
b. Screening (see 4.3).
c. Conformance inspection (see 4.4).
8
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business