B57891M472K EPCOS Inc, B57891M472K Datasheet - Page 20

• 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

Mounting
Operation
This listing does not claim to be complete, but merely reflects the experience of EPCOS AG.
Please read Cautions and warnings and
Important notes at the end of this document.
Temperature measurement and compensation
Leaded NTC thermistors, lead spacing 2.5 mm
Ensure that no thermo-mechanical stress occurs due to production processes (curing or
overmolding processes) when thermistors are sealed, potted or overmolded or during their
subsequent operation. The maximum temperature of the thermistor must not be exceeded.
Ensure that the materials used (sealing/potting compound and plastic material) are chemically
neutral.
Electrodes/contacts must not be scratched or damaged before/during/after the mounting
process.
Contacts and housing used for assembly with the thermistor must be clean before mounting.
Ensure that adjacent materials are designed for operation at temperatures comparable to the
surface temperature of the thermistor. Be sure that surrounding parts and materials can
withstand the temperature.
Avoid contamination of the thermistor surface during processing.
The connections of sensors (e.g. cable end, wire end, plug terminal) may only be exposed to
an environment with normal atmospheric conditions.
Tensile forces on cables or leads must be avoided during mounting and operation.
Bending or twisting of cables or leads directly on the thermistor body is not permissible.
Avoid using chemical substances as mounting aids. It must be ensured that no water or other
liquids enter the NTC thermistors (e.g. through plug terminals). In particular, water based
substances (e.g. soap suds) must not be used as mounting aids for sensors.
Use thermistors only within the specified operating temperature range.
Use thermistors only within the specified power range.
Environmental conditions must not harm the thermistors. Only use the thermistors under
normal atmospheric conditions or within the specified conditions.
Contact of NTC thermistors with any liquids and solvents should be prevented. It must be
ensured that no water enters the NTC thermistors (e.g. through plug terminals). For
measurement purposes (checking the specified resistance vs. temperature), the component
must not be immersed in water but in suitable liquids (e.g. Galden).
Avoid dewing and condensation unless thermistor is specified for these conditions.
Bending or twisting of cables and/or wires is not permissible during operation of the sensor in
the application.
Be sure to provide an appropriate fail-safe function to prevent secondary product damage
caused by malfunction.
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B57891M
M891