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FG-S Connectors

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The FG-S Connectors have anisotropic conductionproperties. Thin metal wires are embedded with a vertical orientation within the silicone rubber on 0.10 mm centers. Low resistance and high current carrying capacity make this series very versatile for most typical interconnect applications.

The basic FG-S design is one row of gold-plated tips of Phosphor Bronze wires embedded in silicone rubber which will connect two parallel sets of contact, both having one row of contact pads.

PropertyUnitMeasure FG-SMethod
Insulation Material silicone rubber silicone sponge
Color clear or white blue Visual
Specific Gravity g/cm3 1.02 0.74 ASTM D792
Hardness Durometer A 47 ASTM D2240
Tensile Strength MPa 3 ASTM D412
Elongation % 240 ASTM D412
Volume Resistivity MΩ-m 7.0 x 106 ASTM D257
Conductive Material Type tips of Phosphor Bronze wire; Gold-Plated
Wire Diameter μm 30
Gold-Plated Thickness μm 0.15
Dimensions, Tolerances Width (W) mm 1.40 to 3.00 ± 0.20
Length (L) mm 10.00 to 25.00 ± 0.25
25.01 to 50.00 ± 0.30
50.01 to 80.00 ± 0.40
80.01 to 120.00 ± 0.50
Height (H)
(note: H ≥ W)
mm 1.40 to 4.00 ± 0.10
4.01 to 10.00 ± 0.15
Core: Width (W)
Pitch (P)
Skewness
mm 0.40 ± 0.08
mm 0.10 ± 0.05
degrees 2° maximum
Recommended Dimensions:
Connector Height versus Electrode Width and Gap.
mm Connector HeightElectrode WidthElectrode Gap
min. 1.4 0.21 0.21
2.0 0.22 0.22
3.0 0.24 0.24
4.0 0.25 0.25
5.0 0.27 0.27
6.0
0.29 0.29
7.0 0.31 0.31
8.0 0.32 0.32
9.0 0.34 0.34
max. 10.0 0.36 0.36

TABEL B

Cross-Sectional View

Figure 2 shows the dimensions of the ZEBRA® FG-S Connectors. When ordering, the dimensions should be specified within the limits shown in Table B.

Figure 2Note: Vertical contact wires may appear at each end of the length dimension, but do not affect performance. Maximum skewness < 2°

Typical Installation

Figure 3

Typical Performance Characteristics

FGS CONNECTOR: COMPRESSION % vs. LOAD AND RESISTANCE
Specimen: Connector FG-S (2mmW x 10mmL x 3mmH)

Compression % vs. Force (N/pc.)
% 5% 10% 15% 20% 25%
Aver. N/pc. 5.7 6.6 7.5 8.4 9.6
Resistance vs. Compression % (Ω/0.25mm Pad)
% 5% 10% 15% 20% 25%
Aver. Ω 0.36 0.35 0.35 0.36 0.38
Max. Ω 0.61 0.59 0.59 0.62 0.70
Min. Ω 0.23 0.22 0.22 0.22 0.22

Comparison Data

MeasurementFG-S Test Condition
Continuity Resistance 0.50Ω/pad (0.25mm Width Pad) see
below
Current Carrying
Capacity
30 mA/wire
Insulation Resistance > 20 MΩ (Gap=0.25mm)
Temperature Range -40° C to +85° C
-40° F to +185° F
Compression Range 5% to 20% H < 3mm,
0.15 ~ 0.60mm H ≥ 3mm
consult factory for application specifics

TEST METHOD FOR COMPRESSION % vs. LOAD AND RESISTANCE

Test Method for FG-S Connectors in the charts on this page used the following physical and electrical parameters:

  • Electrodes: (Upper) Gold-plated PCB (common type electrode)
    (Lower) 0.5mm P, 0.25mm Pad’s W, Gold-plated PCB
  • Space of electrodes @ 0.25, 50VDC
  • Measurement: Digital ohm meter & Compression load meter
  • Using Amps: 100mA D.C.
  • Condition: Measured at room temperature 30 minutes later