Precision and power resistors for current measurement
Internationally, Isabellenhütte belongs to the leading manufacturers of low-impedance precision resistors. Regardless whether of simple design or heavily-loadable power resistors: our ries of products satisfy the highest demands. In 1987 we were the first in the world to produce the SMD-mOhm current-measuring shunt. Up until today we t standards in this technology.
Small temperature coefficient, low thermoelectric voltage, high long-term stability, low inductance and high
(pul-)loadability: the are the esntial requirements on precision resistors for current measurement.
Some of the features can be determined through resistance materials, other factors can be influenced by the design.
We distinguish two production technologies: ISA-PLAN® (foil resistors in etching technology) and ISA-WELD® (electron-beam-welded Cu-Manganin®-Cu strips).
ISA-PLAN® technology:
Using etching technology, the resistance elements are manufactured from foils of the precision resistance alloys (Manganin®, Zeranin® and Isaohm®), that are mounted electrically insulated on a good heat-conducting metal substrate. The planar structures permit low-inductance design forms and very low thermal internal resistances. An optimized current-density distribution avoids the danger of Hot Spots.
锁定表头Besides the conventional two and four-wire current-measuring resistors, prently five SMD product families are available. They offer a variety of possible us, among others, in the fields automotive, power electronics, motive power engineering, energy measurement and medicine technology.
ISA-WELD® technology:
The resistors of the patented ISA-WELD® process consist of solid electron-beam-welded composite material made from copper and one of our resistance alloy. It can be adapted to almost any optiona l form or application using stamping and bending techniques and therefore enables a high degree of design flexibility. The so-called SMD shunts are ud in
high-current applications of the automobile industry, battery charging technology, motive power engi neering and in electronic energy meters.
Both technologies complement one another and enables the industrial production of precision resistors in the value range of 5 µOhm to 100 Ohm. The planar structure of the resistors permits a simple realization of the four-wire connection technique.
Our precision resistors guarantee:
∙ High continuous performance with small design form
∙ Extremely low TK-values
∙ Very good long-term stability
∙ Low-inductance resistance values from 0.005 mOhm
∙ High pul loadability
∙ A standard delivery of the clost tolerances
∙ Thermoelectric voltage against copper largely eliminated
Products Overview
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Surface mount asmbly
Hybrid asmbly
Precision resistors for high
current nsing and energy
metering
Braking resistors
P.C.B and heatsink
asmbly
Heatsink asmbly
Surface Mount Asmbly
SMx-Series
chip resistor for high load in
sizes 2817, 2512, 2010 and
1206
LMx-Series
standard resistors in sizes
2512, 2010, 1206 and 0805
VMx-Series
Keeping ahead - high
preci chip resistors for
high load in sizes 2512,
2010 and 1206.
Flip-Chip asmbly
2- and 4-terminal resistors
with high load capacity in
size 3925
Composite material
BVB/BVE/BVR/BVS/BVT
Low-ohmic resistors from
composite material
Cu-MANGANIN-Cu from
0.2 mO, for high current in
sizes 2512, 2725, 3920,
4026 and 5930
SMV/SMR
for high pul and
nominal-power very low
tc-values in size 4723
Surface Mount SMx-Series
Resistance Value [Ω] Tolerance [%] TC [ppm/K] load capacity [W]
SMK
2-terminal resistor
size 1206
0.003 to 0.5 1 to 101)50 1
SMK-0
2-terminal resistor zero ohm
size 1206
< 0.0002 < 0 3800 0.5
SMP
2-terminal resistor
size 2010
0.003 to 1 0.5 to 5 50 2
SMS
2-terminal resistor
size 2512
0.003 to 2 0.5 to 5 50 3
SMS-0什么是中央空调
2-terminal resistor zero ohm
size 2512
< 0.0002 < 0 3800 2
SMT
2-terminal
刑罚权size 2817
0.004 to 2 0.5 to 5 50 5
SMT-0
2-terminal zero ohm
size 2817
< 0.0002 < 0 3800 2
1) 1%, 2% available for values >= 25mOhm
Surface Mount LMx-Series
Resistance Value [Ω] Tolerance [%] TC [ppm/K] load capacity [W]
LMS
2-terminal-resistor
size 2512
0.001 to 0.5 1 to 5 50 2
LMP
口角开裂
2-terminal-resistor
size 2010
0.001 to 0.5 1 to 5 50 1
海鲈鱼怎么做好吃
LMK
2-terminal-resistor
size 1206
0.001 to 0.2 5 50 0.5
LMI
2-terminal-resistor
size 0805
0.001 to 0.02 5 50 0.25
Surface Mount VMx-Series
Resistance Value [Ω] Tolerance [%] TC [ppm/K] load capacity [W]
VMK
2-terminal resistor
size 1206
0.01 to 0.5 1 to 5 20 1
VMP
2-terminal resistor
size 2010
0.005 to 1 1 to 5 20 2
VMS
2-terminal resistor
size 2512
0.005 to 2 0.5 to 5 20 3
VMI
2-terminal resistor
size 0805
0.01 to 0.3 5 20 0.5
VMI-0
2-terminal resistor zero ohm
size 0805
< 0.0002 < 0 3800 0.25highlight
VMK-0
2-terminal resistor zero ohm
size 1206
< 0.0002 < 0 3800
0.25
Surface Mount Flip-Chip Asmbly
Resistance Value [Ω] Tolerance [%] TC [ppm/K] load capacity [W]
PMA
4-terminal surface mounting
size 3925
0.002 to 0.5 1 to 5
30 3
PMD
2-terminal surface mounting
size 3925
0.01 to 2 1 to 5 50 2
Surface Mount Composite Material BVB/BVE/BVR/BVS/BVT
Resistance Value
[Ω]
Tolerance
[%]
TC
[ppm/K]
load capacity
[W]
BVE
2-terminal
size 5930宝宝睡眠时间
0.0002 to 0.001 1 to 5 50 7
BVS
2-terminal
size 3920
0.0002 to 0.005 1 to 5 50 5
