MIL-PRF-19500/337L
3. REQUIREMENTS
3.1 General. The individual item requirements shall be as specified in MIL-PRF-19500 and as modified herein.
3.2 Qualification. Devices furnished under this specification shall be products that are manufactured by a
manufacturer authorized by the qualifying activity for listing on the applicable qualified manufacturers list (QML)
before contract award (see 4.2 and 6.3).
3.3 Abbreviations, symbols, and definitions. Abbreviations, symbols, and definitions used herein shall be as
specified in MIL-PRF-19500.
* 3.4 Interface and physical dimensions. Interface and physical dimensions shall be as specified in
MIL-PRF-19500, and on figures 1 (axial leads), figure 2 (DO-213AA), figure 3 (UB and UBN), figure 4 (die).
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. The `UR' version shall be structurally identical to the
axial leaded versions except for end-cap lead attachment.
3.5 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, and
JANTXV may be abbreviated as J, JX, and JV, respectively. The part number may be reduced to J4153, JX4153, or
JV4153. No color coding shall be permitted for part numbering.
3.5.1 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 around the periphery of the cathode. At the option of the manufacturer, UR surface mount devices
may include laser marking on an end-cap, to include part number and lot date code for all levels. The prefixes JAN,
JANTX, or JANTXV may be abbreviated as J, JX, or JV, respectively. (Example: The part number may be reduced to
JV4153).
3.5.2 UB devices. `UB' devices do not require polarity marking.
3.6 Electrical performance characteristics. Unless otherwise specified herein, the electrical performance
3.7 Electrical test requirements. The electrical test requirements shall be as specified in table I herein.
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.
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