B57237S479M EPCOS Inc, B57237S479M Datasheet - Page 13
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B57237S479M
Manufacturer Part Number
B57237S479M
Description
Thermistors - NTC 4.7 Ohms 5.1amps 2900k
Manufacturer
EPCOS Inc
Type
NTCr
Series
B57237r
Datasheet
1.B57237S0220M000.pdf
(15 pages)
Specifications of B57237S479M
Resistance
4.7 Ohms
Tolerance
20 %
Termination Style
Radial
Operating Temperature Range
- 55 C to + 170 C
Current Rating
5.1 Amps
Dimensions
15 mm Dia. x 7 mm W x 22 mm H
Lead Spacing
7.5 mm
Power Rating
3.1 W
Thermistor Type
NTC
Thermistor Tolerance
± 20%
Thermistor Case Style
Disc
No. Of Pins
2
B Constant
2900
Operating Current
5.1A
Operating Temperature Max
+170°C
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Symbols and terms
Symbol
B
B
C
C
I
I
I
I
I
k
n
P
P
P
P
R
R
R
R
T
t
T
t
T
Please read Cautions and warnings and
Important notes at the end of this document.
Inrush current limiters
ICLs
max
NTC
R
RMS
a
R
A
max
25/100
25
diss
el
max
test
th
load
R
S
T
R
/R
R
English
B value
B value determined by resistance
measurement at 25 C and 100 C
Test capacitance
Heat capacitance
Current
Maximum current within stated
temperature range
NTC current
Rated current
Root-mean-square value of current
Parameter for calculating the NTC
resistance as a function of current
(specified for inrush current limiters)
Parameter for calculating the NTC
resistance as a function of current
(specified for inrush current limiters)
Maximum power at 25 C
Power dissipation
Electrical power
Maximum power within stated
temperature range
Load resistance
Rated resistance
Resistance tolerance
Series resistance
Resistance at temperature T
(e.g. R
Temperature
Time
Ambient temperature
Thermal threshold time
Upper category temperature
25
= resistance at 25 C)
Page 13 of 15
German
B-Wert
B-Wert, ermittelt durch Widerstands-
messungen bei 25 C und 100 C
Prüfkapazität (elektrisch)
Wärmekapazität
Strom
Maximalstrom im angegebenen
Temperaturbereich
Heißleiter-Strom
Nennstrom
Effektivwert des Stromes
Konstante zur Berechnung des
Heißleiterwiderstandes in Abhängigkeit
von der Stromstärke (bei
Einschaltstrombegrenzern angegeben)
Konstante zur Berechnung des
Heißleiterwiderstandes in Abhängigkeit
von der Stromstärke (bei
Einschaltstrombegrenzern angegeben)
Maximale Leistung bei 25 C
Verlustleistung
Elektrische Leistung
Maximale Leistung im
angegebenenTemperaturbereich
Ladewiderstand
Nennwiderstand
Widerstandstoleranz
Serienwiderstand
Widerstand bei Temperatur T
(z.B. R
Temperatur
Zeit
Umgebungstemperatur
Thermische Ansprechzeit
Obere Grenztemperatur
(Kategorietemperatur)
25
= Widerstand bei 25 C)
B57237
S237