Application Specification
Terminal Block
Stacking Connectors
NOTE
114-20079
06 AUG 08
Rev E
i
All numerical values are in metric units [with U.S. customary units in brackets]. Dimensions are in millimeters. Unless
otherwise specified, dimensions have a tolerance of +0.13 and angles have a tolerance of +2 . Figures and
illustrations are for identification only and are not drawn to scale.
_
1. INTRODUCTION
This specification covers the requirements for application of Terminal Block Stacking Connectors. The
complete line consists of one–piece side entry, angled entry, and top entry printed circuit (pc) board terminal
blocks and plug connectors with mating right–angle or vertical mount pc board headers. PC board headers are
offered with either open and closed ends, and also in double–row configurations. These terminal blocks feature
screw clamp contacts that accept wire sizes 0.03–4 mm
2
(solid), or 0.03–2.5 mm
2
(stranded). Wire entry is
perpendicular to the screws. They are available in configurations of 2.54, 3.5, 3.81, 5, 5.08, 7.5, 7.62, 10, or
10.16 mm contact centerline spacings.
Side entry wire, angled entry wire, and top entry wire pc board mount terminal blocks (only 5, 5.08, 7.5, and
7.62 mm pitch), as well as the pc board mating header (only 5, 5.08 mm pitch, open–ended, or unshrouded)
are stackable end–to–end without loss of centerline. Ease of assembly is facilitated, in most versions, by
built–in interlocks on the housing.
When corresponding with Tyco Electronics Personnel, use the terminology provided on this specification to
help facilitate your inquiry for information. Basic terms and features of components are provided in Figure 1.
Test Facility
90
°
and 180
°
Plug
Closed End
180
°
Header
Assemblies
Angled Wire Entry
Unshrouded
Pin Header
Open End
Top Wire Entry
90
°
Header
Assembly
Clamping
Screw
Retention
Latch
PC Board Mount
Side Wire Entry
Plug
Figure 1 (cont’d)
E
2008 Tyco Electronics Corporation, Harrisburg, PA
TOOLING ASSISTANCE CENTER 1-800-722-1111
PRODUCT INFORMATION 1-800-522-6752
This controlled document is subject to change.
For latest revision and Regional Customer Service,
visit our website at
All International Rights Reserved
TE logo and Tyco Electronics are trademarks.
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LOC B
www.tycoelectronics.com
*Trademark. Other products, logos, and company names used are the property of their respective owners.
Terminal Block Stacking Connectors
114-20079
2nd Level
2nd and 3rd Level
Wire Entries
Test Facilities
Three Level
Interlock Feature
3rd Level
1st and 2nd Level
Figure 1 (end)
2. REFERENCE MATERIAL
2.1. Revision Summary
This paragraph is reserved for a revision summary covering the most recent additions and changes made to
this specification which include the following:
S
Updated document to corporate requirements
S
New format
2.2. Customer Assistance
Reference base part number 284093 and product code 7742 are representative numbers of Terminal Block
Stacking Connectors. Use of these numbers will identify the product line and expedite your inquiries through a
service network established to help you obtain product information. Such information can be obtained through
a local Tyco Electronics Representative or, after purchase, by calling the Tooling Assistance Center or the
Product Information Center number at the bottom of page 1.
2.3. Drawings
Customer Drawings for the connectors are available from the service network. The information contained in
Customer Drawings takes priority if there is a conflict with this specification or with any technical
documentation supplied by Tyco Electronics.
2.4. Specifications
Product Specification 108–20166 provides test and performance requirements.
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114-20079
2.5. Manuals
Manual 402–40 is available upon request and can be used as a guide in soldering. This manual provides
information on various flux types and characteristics along with the commercial designation and flux removal
procedures. A checklist is included in the manual as a guide for information on soldering problems.
3. REQUIREMENTS
3.1. Materials
Terminal Block Stacking Connectors are made of UL 94V–0 rated PA–66.
3.2. Storage
A. Ultraviolet Light
Prolonged exposure to ultraviolet light may deteriorate the chemical composition used in the pc board jack
connector material.
B. Shelf Life
The jack connectors are packaged and shipped in protective anti–static tube or tray containers. To prevent
damage to these connectors, they should remain in the container until ready for installation. Also, to
prevent possible storage contamination, the connectors should be used on a first in, first out basis.
C. Chemical Exposure
Do not store jack connectors near any chemical listed below as they may cause stress corrosion cracks in
the connector.
Alkalies
Amines
3.3. Polarization
Ammonia
Carbonates
Citrates
Nitrites
Phosphates Citrates
Sulfur Nitrites
Sulfur Compounds
Tartrates
Design configuration prevents plug and receptacle connectors from being mated incorrectly.
3.4. PC Board Layout
A. Single Connector
Use a pc board with a nominal thickness of 1.6–2.4 mm. See Figure 2. Customer drawings provide a
complete definition of pc board layout.
WIRE SIZE
DESCRIPTION
SOLID
STRANDED
HOLE
DIAMETER (mm)
1 mm
2
PC Board Mount
1.5 mm
2
2.5 mm
2
4 mm
2
Pin Header Unshrouded
Header Assembly
---
---
0.75 mm
2
1 mm
2
1.5 mm
2
2.5 mm
2
---
---
1.1 +0.1/-0
1.1 +0.1/-0
1.4 +0.1/-0
1.4 +0.1/-0
1.4 +0.1/-0
1.4 +0.1/-0
Figure 2
Rev
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Terminal Block Stacking Connectors
114-20079
B. Stacked Connectors
PC board mount connectors with 5, 5.08, 7.5, and 7.62 mm pitch; or headers with 5 and 5.08 mm pitch
can be stacked end–to–end without loss of centerline spacing to create the required position size. Ease of
assembly if facilitated in most versions by interlocking features. The 5 and 5.08 mm pitch open–ended
headers are designed for stacking applications. However, those with closed ends are not. See Figure 3.
3.7
B
3.2
A
A
Dimension A" equals contact centerline spacing (5 or 5.08).
Dimension B" equals 1/2 dimension A".
Value in parenthesis refers to 5.08 pitch headers
Figure 3
3.5. Wire Selection, Preparation, and Installation
A. Selection
The connectors will accept wires with conductors of the sizes defined in Figure 4.
B. Strip Length
The wire must be stripped to the proper dimension to ensure correct insertion depth in the connector.
Excessive conductor will be exposed if the strip length is too long and entrapment of the insulation or
improper termination will result if the strip length is too short. See Figure 4.
C. Installation
Two screwdrivers must be used to open and close the screw clamps. The wire must be inserted into the
wire hole until the insulation is even with the housing at the wire hole opening. The screw must be hand
tightened with the proper screwdriver to within the torque provided in Figure 4. Pull back on the wire to be
sure it is secure and check there are no wire strands outside the terminal block.
B
DIM A" DIM B" PART NUMBER
1.8
2.5
0.3
0.6
785730-1
785730-2
Strip Length
A
Figure 4 (cont’d)
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Terminal Block Stacking Connectors
114-20079
WIRE SIZE (mm )
DESCRIPTION
SOLID
STRANDED
2
STRIP LENGTH
(mm)
SCREW TORQUE
(Nm)
SCREWDRIVER
PC Board Mount
Plug (3.5-3.81 mm Pitch)
1
0.05-1.5
1.5
0.75
1
1.5
2.5
1
1.5
4-5
5-6
5-6
5.5-6.5
6.5-7
4-6
6-7.5
0.20
0.25
0.5
0.5
0.5
0.5
0.5-0.8
785730-1
PC Board Mount
Plug (90
°
& 180
°
)
Plug
2.5
4
1.5
2.5
785730-2
Figure 4 (end)
3.6. Physical Characteristics
The terminal block connectors consist of specially designed screw–activated mechanisms that are captivated
inside the housing. When stripped wire is inserted into the connector and the screw is tightened, the screw
activates a clamp which compresses the wire against the terminal. See Figure 5.
Screw
Terminal Block
Clamp
Terminal
Figure 5
3.7. Soldering
NOTE
Stripped Wire
Manual 402-40 provides some guidelines for establishing soldering practices. Refer to Paragraph 2.5, Manuals.
i
A. Fluxing
The contact solder tails and, if applicable, attaching hardware must be fluxed prior to soldering with a
mildly active, rosin base flux. Selection of the flux will depend on the type of pc board and other
components mounted on the board. Additionally, the flux must be compatible with the wave solder line,
manufacturing, health, and safety requirements. Call the Product Information number at the bottom of
page 1 for consideration of other types of flux. Some fluxes that are compatible with these connectors are
provided in Figure 6.
COMMERCIAL DESIGNATION
FLUX TYPE
ACTIVITY
RESIDUE
KESTER
Y
ALPHA
U
Y
Trademark of MacDonald & Co.
U
Designation of Alpha Metals Inc.
Type RMA (Mildly Activated)
Center (Activated)
Mild
Medium
Noncorrosive
May be Corrosive
185/197
1544, 1545, 1547
611
711, 809, 811
Figure 6
Rev
E
Tyco Electronics Corporation
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