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【范围】
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This specification covers Terminal Junction System (TJS) components which are used for interconnection of wiring and
incorporation of passive components (see 6.1). These environment resistant components have in common the use of
crimp type external pin contacts in accordance with AS39029/1 for Series I or crimp type external socket contacts in
accordance with AS39029/22 for Series II. This family of TJS components is designed to operate continuously over a
temperature range of -65 °C to 200 °C, using any combination of temperatures generated by the electrical load and
ambient temperature so that the maximum internal hot spot, combined temperature, will not exceed the maximum
specified for the class of TJS component, unless otherwise specified (1.2, 3.1). The components making up the system
and covered by this specification include:
a. Terminal junction bussing blocks (6.8.2)
(1) Feedback type (6.8.2.1)
(2) Feedthrough type (6.8.2.2)
b. Racks (mounting holders) for blocks (6.8.3)
c. Brackets, block mounting (6.8.4)
d. Wire in-line junctions (6.8.5)
e. Grounding terminal (6.8.6)
f. Grounding blocks (6.8.7)
g. Electronic blocks (6.8.8)
h. Electronic in-line junctions (6.8.9)
1.1.1 CTS: The TJS components conform to the requirements of MIL-HDBK-1277 and MIL-HDBK-454.
1.2 Classification
1.2.1 Terminal junction components fabricated to this specification are classified as follows:
a. Series. The Series I and II TJS components are not interchangeable or intermateable.
Series I. External pin contact crimped on wire.
Series II. External socket contact crimped on wire.
b. Classes. Terminal junction components described herein are Class D. Classes A, B and C components are
inactive for new design. Class D components shall be used for direct Government acquisition. Appendix A
provides performance tests and other information relating to Classes A, B and C. Appendix A indicates the
relationship between Class D part numbers and the superseded part numbers of Classes A, B and C. Series
II components of AS81714 meet Class D environmental requirements.
1.3 Marking Identification
The components covered by this specification shall be identified by a part number, as shown by the applicable detail
specification. Series I components shall be identified as in the following examples, or as otherwise specified (3.1).
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1.3.1 Component designator: A different component designator is required for each component having identical
external contacts and for each combination of different contacts used in a block.
1.3.2 Bussing and circuit designator: The bussing and circuit designators shall be as shown on the applicable detail
specification (3.1).
1.3.3 Voltage rating: The maximum working voltages shall be as shown in Table 13.
1.4 External Contact Conductor Size Range
Each external contact with the indicated dash number accommodates the range of conductor sizes specified in Table 1.
1.4.1 Grommet wire sealing ranges: For TJS components, each grommet aperture for a specified contact dash number
seals on the O.D. range of smooth finished wires specified in Table 1.
CAUTION: WHEN SELECTING WIRE REQUIRING SEALING, THE FINISHED DIAMETER SHALL BE
WITHIN THE O.D. RANGE SHOWN IN TABLE 1.
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