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2. REFERENCE MATERIAL
2.1. Revision Summary
Revisions to this application specification include:
•
•
•
Updated application specification to corporate requirements
New logo
Changed time in Figure 8
2.2. Customer Assistance
Reference Product Base Part Number 5745114 and Product Code 4934 are representative of AMPLIMITE
HD-20 Series 454 and 545 right-angle rear load metal shell pc board connectors. Use of these numbers will
identify the product line and expedite your inquiries through a service network established to help you obtain
product and tooling information. Such information can be obtained through a local Representative or, after
purchase, by calling PRODUCT INFORMATION at the number at the bottom of page 1.
2.3. Drawings
Customer Drawings for product part numbers are available from the service network. If there is a conflict
between the information contained in the Customer Drawings and this specification or with any other technical
documentation supplied, the information contained in the Customer Drawings takes priority.
2.4. Specifications
Product Specification 108-40025 provides product performance and test information.
2.5. Manuals
Manual 402-40 can be used as a guide to soldering. This manual provides information on various flux types and
characteristics with the commercial designation, flux removal procedures, and a guide for information on
soldering problems.
2.6. Instructional Material
Instruction Sheets (408-series) provide product assembly instructions or tooling setup and operation
procedures and Customer Manuals (409-series) provide machine setup and operating procedures. At the time
of publication of this document, there is no instructional material available that pertains to this product.
3. REQUIREMENTS
3.1. Limitations
The product specification referenced in Paragraph 2.4 contains limitations regarding these connectors.
3.2. Storage
A. Ultraviolet Light
Prolonged exposure to ultraviolet light may deteriorate the chemical composition used in the connector
material.
B. Shelf Life
The connectors should remain in the shipping containers until ready for use to prevent deformation to the
contacts. The connectors should be used on a first in, first out basis to avoid storage contamination that
could adversely affect signal transmission.
C. Chemical Exposure
Do not store connectors near any chemical listed below as they may cause stress corrosion cracking in the
contacts.
Alkalies
Amines
Ammonia
Carbonates
Citrates
Nitrites
Phosphates Citrates
Sulfur Nitrites
Sulfur Compounds
Tartrates
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NOTE
Where the above environmental conditions exist, phosphor-bronze contacts are recommended instead of brass.
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3.3. Connector Shell Sizes
A composite of the five connector shell sizes with the overall dimension for each is provided in Figure 2.
54.84 [2.159]
52.43 [2.064]
38.38 [1.511]
24.66 [.971]
16.33 [.643]
Shell Sizes:
Figure 2
3.4. Shielding
These connectors have tin or zinc chromate plated steel shells which provide continuity for electromagnetic
compatibility (EMC) applications. When connectors are mated with corresponding metal shell connectors,
grounding continuity is achieved. Use of commercially available screws and nuts to secure the connectors
together provide electrical continuity to any ground path on the pc board including the mounting holes.
3.5. Polarizing and Keying
The keystone configuration of the connector mating face prevents accidental inversion of mating connectors. To
prevent mismating of same size connectors, keying plugs can be placed in empty contact cavities of the
receptacle. See Figure 3.
NOTE
If keying plugs are used, the corresponding contact cavity in the mating plug MUST BE EMPTY.
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Receptacle
Empty Contact Cavity
Keying Plug
Figure 3
3.6. Connector Spacing
Care must be used to avoid interference between adjacent connectors and/or other components. Spacing is
dependent on variable hardware used and the clearance required for mating connectors. The minimum
allowable distance between connectors to ensure proper mating is provided in Figure 4.
Centerline of Mounting
Flange Hole
PC Board
Distance (Variable)
Between Connectors
Figure 4
3.7. PC Board
A. Thickness
The maximum pc board thickness shall be 2.36 [.093] nominal.
B. Layout
The support bracket hardware holes and contact tail holes in the pc board must be precisely located to
ensure proper placement and optimum performance of the connector. The pc board layout must be
designed using the dimensions provided on the customer drawing for the specific connector.
Recommended pc board layouts are shown in Figure 5.
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