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Soft Silicone Gel Grommets

 

  • Ultra Soft, High Damping Silicone Gel Mounts.

  • Broad Temperature Range.

  • Can Reduce PCB Flexure and Cracking.

  • Splits in Two to Suit Various PCB Depths.

  • Stable Performance over -40°C to 200°C

 

PCBs often need very soft vibration and shock mounting solutions due to their low weight. These highly damped silicone gel mounts are specially designed for PCB isolation, splitting in two to take various PCB thicknesses. Much softer than traditional rubber and thermoplastic solutions and stable performance over extreme temperatures.

Outstanding vibration and shock absorption for small and narrow enclosures. This silicone based gel offers excellent shock and vibration damping. The material disperses impact three dimensionally due to its unique molecular structure. Ideal for fragile PCBs which can flex and crack in harsh environments. Damps wide frequency range.

Gel type 5 is UL HB listed. Gel types 5,6,7 & 8 have < 3,000 ppm silicone gases. Very little siloxane gas is emitted under 100c operating temp.

Dimensional Data:

  Click here for technical drawings

 

Part Number 
Outside Diameter 
Flange Height 
Inside Diameter 
Collar Hole
Inner Diameter 
Mounting Hole Diameter 
Center Fixing Height 
S1 
11 
3 
4 
3 
7 
3.5 
S5
11
3
4
3
7
3.5
A1
14
4
5
3
9
4
A2
14
4
5
3
9
4
B1
25
5
6
4
14
6.5
B2
25
5
6
4
14
6.5
 
 
Specification:
 
 
Part Number 
Optimum Load
(kg/4 legs) 
Shore A
Hardness (approx) 
Gel Type 
Recommended
Frequency (Hz) 
Resonance
Point 
Frequency
Responce 
S1
0.2  ~ 0.75
6
7 
0.2kg: from 90
0.75kg: from 60
64 to 42
S5
0.4 ~ 1.2
10
5
Higher
than S1
  n/a
 
A1
0.5 ~ 2.5
10
6/5
0.5kg: from 95
2.5kg: from 50 
 67 to 35
A2
2.5 ~ 4.0
14
6
 2.5kg: from 70
4kg: from 55
 49 to 37
B1
4 ~ 15
14
6
4kg: from 70
15kg: from 35
 49 to 23
B2
15 ~ 32
27
8
15kg: from 30
32kg: from 25
 20 to 15
Dimensions in mm 
 
Material Properties:
Gel Type / Unit 
S1 
S5 
A1 
A2
B1 
B2 
Remark 
Appearance 
Translucent 
Yellow 
Translucent 
Translucent 
Translucent 
Translucent 
 
Hardness 
Needle Penetration
(1/10mm) (#1) 
100
55 
55
- 
- 
- 
JIS K 2207 
 Asker C (#2)
 -
- 
- 
33 
33 
52.5 
 SRIS 0101
Shore A Equivalent (approx)
6 
10 
10 
14 
14 
27
- 
 Specific Gravity
 1.06
 1.05
 10.5
 1.06
 1.06
 1.07
 -
 Tensile Strength
 0.23
 1.17
 1.17
 1.58
 1.58
 2.35
 JIS K 6215
 Elongation %
 480
 710
 710
 480
 480
 300
 JIS K 6251
 Young Modulus (kPa)
37.5
 119.5
 119.5
 670.3
 670.3
 1432.6
 -
 Specific Heat (j/g.k)
 1.51
 1.52
 1.52
 1.51
 1.51
 1.52
 DSC
 Thermal Conductivity (W/m.k)
 0.20
 0.20
 0.20
 0.20
 0.20
 0.20
 -
 Specific Volume Resistance Ratio (Ohm-cm)
 2.9 * 10
 4.0 * 10
 4.0 * 10
 4.0 * 10
 4.0 * 10
 6.6 * 10
 JIS K 6911
 Dielectric Breakdown Strength (kV/m) 
16.3 
 15.1
 15.1
 18.4
 18.4
 18.7
 JIS C 2110
Chemical
Resistance 
Toluene 
 X 
X
X 
X
X
X
JIS K 6258
Room Temp
x 168h 
 Acetone
 X 
X
X 
X
X
X
Methanol
 O 
O
O 
O
O
O
 Distilled H2O
O
O
O 
O
O
O
Fuel 
X
X
X 
X
X
X
 Lubricant
X
X
X 
X
X
X
 NaCI (10%)
O
O
O 
O
O
O
 HCI (10%)
O
O
O 
O
O
O
 NaOH (5%)
 O 
O
O 
O
O
O
Normal Temp range (oC) 
-40 to +200 
-40 to +200 
-40 to +200 
-40 to +200 
-40 to +200 
-40 tp +200 
(#1) The needling depth into the gel represents the hardness
(#2) Rubber Hardness Meter - Hardess is represented by rebounding distance when needle contacts the gel surface 

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