B57891M472K EPCOS Inc, B57891M472K Datasheet - Page 13
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B57891M472K
Manufacturer Part Number
B57891M472K
Description
THERMISTOR NTC 4.7K OHM 10% RAD
Manufacturer
EPCOS Inc
Series
B57891r
Type
NTCr
Specifications of B57891M472K
Resistance In Ohms @ 25°c
4.7K
Resistance Tolerance
±10%
B Value Tolerance
±3%
B25/100
3980K
Operating Temperature
-40°C ~ 125°C
Power - Max
200mW
Lead Length
1.42" (36.00mm)
Mounting Type
PCB, Through Hole
Package / Case
Molded Disc
Resistance
4.7 KOhms
Tolerance
10 %
Termination Style
Radial
Operating Temperature Range
- 40 C to + 125 C
Dimensions
3.5 mm Dia. x 36 mm L
Lead Spacing
2.5 mm
Power Rating
200 mW
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
B0/50
-
B25/50
-
B25/75
-
B25/85
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
B57891M 472K
B57891M0472K000
B57891M0472K000
Bending strength: Test Ub:
Torsional strength: Test Uc: severity 2
When subjecting leads to mechanical stress, the following should be observed:
Tensile stress on leads
During mounting and operation tensile forces on the leads are to be avoided.
Bending of leads
Bending of the leads directly on the thermistor body is not permissible.
A lead may be bent at a minimum distance of twice the wire's diameter +2 mm from the solder
joint on the thermistor body. During bending the wire must be mechanically relieved at its outlet.
The bending radius should be at least 0.75 mm.
Twisting of leads
The twisting (torsion) by 180 of a lead bent by 90 is permissible at 6 mm from the bottom of the
thermistor body.
4
When thermistors are sealed, potted or overmolded, there must be no mechanical stress caused
by thermal expansion during the production process (curing / overmolding process) and during
later operation. The upper category temperature of the thermistor must not be exceeded. Ensure
that the materials used (sealing / potting compound and plastic material) are chemically neutral.
5
If cleaning is necessary, mild cleaning agents such as ethyl alcohol and cleaning gasoline are
recommended. Cleaning agents based on water are not allowed. Ultrasonic cleaning methods are
permissible.
6
In order to maintain their solderability, thermistors must be stored in a non-corrosive atmosphere.
Humidity, temperature and container materials are critical factors.
Do not store SMDs where they are exposed to heat or direct sunlight. Otherwise, the packing ma-
terial may be deformed or SMDs may stick together, causing problems during mounting. After
opening the factory seals, such as polyvinyl-sealed packages, use the SMDs as soon as possible.
Please read Cautions and warnings and
Important notes at the end of this document.
Temperature measurement
Leaded NTC thermistors, lead spacing 2.5 mm
Sealing and potting
Cleaning
Storage
Two 90 -bends in opposite directions at a weight of 0.25 kg.
The lead is bent by 90 at a distance of 6 to 6.5 mm from the thermistor body.
The bending radius of the leads should be approx. 0.75 mm. Two torsions of
180 each (severity 2).
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S871