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Specifications:
All-welded construction.
Tolerance:
R> 1W: ± 5 % or 10 %
(electrical specifications)
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
( k in mechanical specifications)
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
Materials:
Core:
Diameter 10-30 mm: Steatite C221 Porcelain C110, only certain
types. Diameter 45mm: Porcelain C410
Diameter: 55mm: Corderite C520Steatite 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.
For our large resistor types corderite C520 are used due to very
high stability to temperature changes
Terminals:
FeNi42 ; has an equivalent temperature expansion coefficient
likes Steatite. FeNi42. can be soldered when it is clean from
oxydation and is relatively stainless.
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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GBF
GRF
GRV
ZBF
ZRF
ZRV
ZBV
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