PRF21BE471QB2RA Murata, PRF21BE471QB2RA Datasheet - Page 82
![Thermistors - PTC 470 OHM 32V](/photos/16/24/162482/nthcp04_sml.jpg)
PRF21BE471QB2RA
Manufacturer Part Number
PRF21BE471QB2RA
Description
Thermistors - PTC 470 OHM 32V
Manufacturer
Murata
Type
PTCr
Series
PRF21r
Datasheet
1.PRF21BB471QB5RA.pdf
(100 pages)
Specifications of PRF21BE471QB2RA
Resistance
470 Ohms
Tolerance
5 %
Termination Style
SMD/SMT
Operating Temperature Range
- 20 C to + 110 C
Current Rating
0.1 mAmp
Dimensions
1.25 mm W x 2 mm L
Voltage
140 V
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
- Current page: 82 of 100
- Download datasheet (3Mb)
12
!Note
80
Resistance - Temperature Characteristics
Overheat Protection Circuit
Resistance - Temperature Characteristics Range (Ref. Only)
• Please read rating and !CAUTION (for storage, operating, rating, soldering, mounting and handling) in this catalog to prevent smoking and/or burning, etc.
• This catalog has only typical specifications because there is no space for detailed specifications. Therefore, please review our product specifications or consult the approval sheet for product specifications before ordering.
10
10
10
10
4
3
2
20
10
10
10
10
PTH
1
4
3
2
20
0
PTF_04BH471Q2N34B0
0
R
R
1
2
20
Thermal
Connection
20
40
Temperature (˚C)
Temperature (˚C)
40
BH
BG
60
BF
BE
60
BD
BC
R
R
BB
E
L
80
80
100
100
120
120
Vcc
140
140
Example of Thermal Response Time
Overheat Sensing Circuit
Relation between resistance change and time after POSISTORr
PTFM04BE222Q2N34B0 is installed on the part heated at a constant
temperature of 90 C (3mm thick alminum sheet) is shown in the figure above.
PTH
10
10
10
10
100
4
3
2
20
80
60
40
20
0
Operating Time of POSISTORr
0
R
1
0
PTF_04BG471Q2N34B0
10
20
R
40
20
R
Temperature (˚C)
R
L1
E1
L2
Aluminum plate
T=90 C constant
60
PTFM04BE222Q2N34B0
POSISTORr
Screw
Time (sec.)
30
Continued on the following page.
80
40
R
100
E2
Load
R meter
50
120
Heater
Vcc
140
60
Apr.25,2011
R90E.pdf
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