User Manual

25
Thermal Solutions Design Guide | Specifications subject to change
Polyimide Thermofoil Heaters
Technical specifications
Specifications
Temperature range: -200 to 200°C (-328 to 392°F). Upper limit
with 0.003” (0.08 mm) foil backing is 150°C (302°F).
Material: 0.002” Polyimide/0.001” adhesive (0.05/0.03 mm).
Resistance tolerance: ±10% or ±0.5 W, whichever is greater.
Dielectric strength: 1000 VRMS.
Minimum bend radius: 0.030” (0.8 mm).
Leadwire: Red PTFE insulated, stranded.
Current capacity (based on 100°C max. ambient temp.):
AWG 30 - 3.0 A
AWG 26 - 5.0 A
AWG 24 - 7.5 A
AWG 20 - 13.5 A
Maximum heater thickness:
Over element 0.012” (0.3 mm)
Over leads
AWG 30 (0.057 mm²) 0.050” (1.3 mm)
AWG 26 (0.141 mm²) 0.060” (1.5 mm)
AWG 24 (0.227 mm²) 0.065” (1.7 mm)
AWG 20 (0.563 mm²) 0.085” (2.2 mm)
Add 0.005” (0.1 mm) to above dimensions for foil backing.
Dimensional tolerance:
6” (150 mm) or less ±0.03” (±0.8 mm)
6.01 to 12” (150 to 300 mm) ±0.06” (±1.5 mm)
Over 12” (300 mm) ±0.12” (±3.0 mm)
Tighter tolerances are available on custom designs if needed.
35
30
25
20
15
10
5
10 20 30 40 50 60 70 80 90 100 110 120 130 140 150
Watts / in²
Operating Temperature (°C)
5.4
4.7
3.9
3.1
2.3
1.6
0.8
Watts / cm²
WA w/ALUM #12 PSA
WA w/ALUM #10/16/19 PSA
WA w/ PSA
WA FACTORY
MOUNTED/CLAMPED
WA Heaters
Maximum Watt Density by Mounting Method
1mil/25μm WA
2mil/50μm Polyimide