R90E7.pdf 05.3.30
Please read rating and !CAUTION (for storage, operating, rating, soldering, mounting and handling) in this catalog to prevent smoking and/or burning, etc.
!Note •Please read rating and !CAUTION (for storage, operating, rating, soldering, mounting and handling) in this PDF catalog to prevent smoking and/or burning, etc.
•This catalog has only typical specifications. Therefore,thereareno space for detailed specifications. Therefore, please approve our productsheet for product specifications before ordering. product specifications before ordering.
This catalog has only typical specifications because you is requested to approve our product specifications or to transact the approval specifications or transact the approval sheet for
POSISTORr for Circuit Protection
for Overheat Sensing Chip Type
Chip Type 0603 (1608) Size
e
This chip PTC Thermistor is reflow soldering SMD type
for overheat sensing for power transistors, power
diodes and power ICs in hybrid circuits.
g
e
T
s Features
1. SMD type is helpful for miniaturizing circuits
because of its small size and light weight.
2. Excellent thermal response due to small size
3. Solid-state construction provides excellent
mechanical vibration and impact resistance.
4. Contactless operation provides noiseless operation.
5. Lead is not contained in the terminations.
L
W
Dimensions (mm)
L
W
T
e
g
PRF18_RB 1.6±0.15 0.8±0.15 0.8±0.15 0.1 to 0.6 PRF21_RA 2.0±0.2 1.25±0.2 0.9±0.2 0.2 min. 0.5 min.
Part Number
Sensing Temperature
(at 4.7k ohm)
(°C)
Maximum
Voltage
(V)
Resistance
(at 25°C)
(ohm)
Temperature Range
(°C)
PRF18BG471QB1RB
65 ±5°C
32
470 ±50%
-20 to 80
PRF18BF471QB1RB
75 ±5°C
32
470 ±50%
-20 to 90
PRF18BE471QB1RB
85 ±5°C
32
470 ±50%
-20 to 100
PRF18BD471QB1RB
95 ±5°C
32
470 ±50%
-20 to 110
PRF18BC471QB1RB
105 ±5°C
32
470 ±50%
-20 to 120
PRF18BB471QB1RB
115 ±5°C
32
470 ±50%
-20 to 130
PRF18BA471QB1RB
125 ±5°C
32
470 ±50%
-20 to 140
PRF18AR471QB1RB
135 ±5°C
32
470 ±50%
-20 to 150
PRF18AS471QB1RB
145 ±5°C
32
470 ±50%
-20 to 160
Part Number
This product is applied to reflow soldering. Please consult us for flow soldering usage.
Chip Tight Tolerance Type 0603 (1608) Size
PRF18_RB1RB series is an improvement on sensing
accuracy from existing PRF18_QB1RB series.
e
g
e
1. Sensing accuracy +/-3 deg.C which is highest of
PTC Thermistor and the same level as NTC at
sensing point.
2. Same resistance-temperature characteristics as
PRF18_QB1RB series.
Easy to use higher accurate sensing type.
3. SMD type is helpful for miniaturizing circuits
because of its small size and light weight.
4. Excellent thermal response due to small size
5. Solid-state construction provides excellent
mechanical vibration and impact resistance.
6. Contactless operation provides noiseless operation.
7. Lead is not contained in the terminations.
T
s Features
L
W
Dimensions (mm)
L
W
T
e
g
PRF18_RB 1.6±0.15 0.8±0.15 0.8±0.15 0.1 to 0.6 PRF21_RA 2.0±0.2 1.25±0.2 0.9±0.2 0.2 min. 0.5 min.
Part Number
9
57
