MR106-250-.01% Huntington Electric Inc., MR106-250-.01% Datasheet

RESISTOR 250 OHM 1/4W .01% WW

MR106-250-.01%

Manufacturer Part Number
MR106-250-.01%
Description
RESISTOR 250 OHM 1/4W .01% WW
Manufacturer
Huntington Electric Inc.
Series
MR100r
Datasheet

Specifications of MR106-250-.01%

Resistance (ohms)
250
Power (watts)
0.25W, 1/4W
Composition
Wirewound
Temperature Coefficient
±10ppm/°C
Tolerance
±0.01%
Size / Dimension
0.250" Dia x 0.500" L (6.35mm x 12.70mm)
Lead Style
Through Hole
Package / Case
Axial
Resistance In Ohms
250
Case
Axial
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Features
-
Height
-
Other names
MR106-250-.01
MR106-250-.01%
H
UNTINGTON
U
Resistance Wire
Mills selects the optimal type and size of
resistance wire alloy for winding its resistors
based upon the physical size of the resistor and
the resistance and temperature coefficient
required. These typically non-magnetic alloys
possess properties that enhance the utility of
each resistor manufactured, including high
electrical resistivity, low temperature coefficient
of resistance ( 10 ppm/ºC) over a wide tempera-
ture range (-65ºC to 125ºC), low thermal EMF
vs. copper, and high tensile strength. The high
resistivity of these alloys allows Mills to place
very high resistance values in very small
packages. In addition, Mills uses other alloys to
achieve temperature coefficients of up to 6,000
ppm/ºC.
Termination
All ultra-precision resistors produced by Mills are
welded in the sandwich or layered style to
guarantee accuracy and stability. All welding is
performed under high-power binocular micro-
scopes. Welding equipment, electrode pres-
sures and heat cycles are monitored regularly.
Terminal materials are selected for maximum
weldability and low thermal EMF.
Lead Material
On our standard resistors, the solder coated,
oxygen free copper lead is molded into the
winding bobbin to assure structural integrity.
Other lead materials are possible; Nickel, Brass,
and Dumet are some of the more popular.
Bobbins
Bobbins are made from molded high tempera-
ture epoxy. The thermal expansion properties of
this product is similar to the wire used in the
resistor and designed to minimize any stress on
the resistor due to environmental changes.
LTRA
M
ILLS
E
P
LECTRIC
RECISION
R
ESISTOR
, I
NCORPORATED
D
W
IVISION
IREWOUND
Quality Control
Mills Resistor meets all applicable quality assur-
ance standards. Our quality control manual is
available upon request.
Encapsulation
After the resistor has been wound, terminated,
and aged, a special coating is applied to the
windings to further protect the windings during
the encapsulation process. An epoxy resin
specially selected because its linear expansion
capabilities match that of the wire is used to
encapsulate the resistor element.
Wattage Ratings
The wattage ratings listed on the following pages
for ultra-precision wirewound resistors are
maximum wattage ratings. They are based upon
an ambient temperature of 125ºC. Ultra-preci-
sion wirewound resistors should not be used at a
combination of full wattage and maximum ambi-
ent temperature where reliability is an important
factor. When high reliability is required, a multi-
plication factor of 0.6 should be applied to the
wattage listed. Also as tolerances get tighter, the
resistor can only operate at a fraction of its rated
power (see derating chart).
Visit our website @ www.millsresistor.com
R
Order Hotline: 916-422-5461
Page 3
ESISTORS
Fax: 916-422-1409

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MR106-250-.01% Summary of contents

Page 1

... They are based upon an ambient temperature of 125ºC. Ultra-preci- sion wirewound resistors should not be used at a combination of full wattage and maximum ambi- ent temperature where reliability is an important factor. When high reliability is required, a multi- plication factor of 0 ...

Page 2

... Thus the Mills part number MR506Q1K5B calls out an .05 watt resistor of 1.5K , temperature coefficient of 3,900 ppm/ºC, and a tolerance of 0.1%; the part number MR106W5K0B calls out a .25 watt resistor of 5K with the standard TC and a tolerance of ± ...

Page 3

... Page 6 MR100 S ERIES This is our standard line of ultra precision resistors. The sizes below should handle most of your needs; however we can provide other sizes and custom configurations should they be required. Just call the factory and describe your needs MR300 S ERIES These resistors, although dimension- ...

Page 4

... Marking Standard markings are the Mills Resistor logo, part number, tolerance, resistance and date code. On very small resistors the part number may be abbreviated. All markings are made with two part epoxy ink designed to resist most cleaning solvents used during circuit board assembly ...

Page 5

... Mills Resistor’s construction method virtually eliminates this effect. Tolerance and TCR Measurements are made on equipment calibrated to NIST standards. Limitations do exist in measuring two-leaded resistors, so there are minimum practical tolerance limits depending upon the resistance required. The following tables shows these ...

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