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Vitreous
Enamelled and cemented Power Resistors from 40W to 800W.
Danotherm
Electric A/S founded in Copenhagen in 1919 manufactures high performence
reliable electrical components and systems. Our product can be
found in the most professional sectors of the industry.
Custom designed
resistors and assemblies are
aviable on request.
Details like wire configuration, creepage distance and inductance
can be specified by the customers. The choice between more than
50 sizes quarantee our customers that the best resistor configuration
can be found within our programme
Thermal models are avaiable
Each resistor can be provided with data sheets including an
individuel thermal model for simulating temperature rises during
load.
Pleace contact us.
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Tolerance:
R> 1W: ± 5 % or 10 %
Power rating: Based on 25 °C
Temperature Range: -50°C - 250°C
Temperature coefficent:
Low ohm: 200 (400ppm)/°.
Medium-high ohm: < 100ppm/°.
Dielectric voltage:
Based on indicated creepage distance from terminals to mounting
bracket.
5mm: 1000V; 6mm 1200V
Other values than indicated are possible.
Insulation Resistance: >102M at
500V
Overload: General: 10 X in 5 seconds
Vibration: Types with Living Terminals (... -M types):
x.y.z (IEC 571):
1 <f< 10 Hz: S =25/f mm
10 <f< 100Hz: S = 250/f2 mm
Shock (..-M types) 3g / 50Hz /2 min
Materials:
Core:
Steatite C221
Porcelain C110, only special types.Steatite C221 is the optimal
choice of ceramic bases material for temperatures below 350 - 400°C.
It has high mechanical strength and excellent DC stability. If higher
teperatures can be expected Porcelain C110 can be used.
Terminals:
FeNi42 ; has an equivalent temperature expansion coefficient
as Steatite. FeNi42. can be soldered when it is clean from oxydation
and is relatively stainless.
Living Terminals: Stainless Steel
Wire:
Low ohms:
CuNi10 (T.C: 400ppm)/ CuNi23Mn (T.C: 200ppm)
Medium Ohms:
CuNi44(T.C.<80ppm)
High Ohms:
NiCr8020; CrAlFe, (T.C. <100ppm)
Coating:
Vitreous Enamel, excellent protection to thin wires. All Vitreous
Enamelled Ressistors meet the IEC 68-2-3 Ca 56 days. Vitreous enamel
can only by used on Steatite. AIPO4 is the best choice
regarding high pulse load capability and high temperature stability.
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GFF
27/50
GFV27/120
ZFF45/200
GFF (Module)
GFF27/153-M
ZFI45/200-M
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