PRF21BE471QB2RA Murata, PRF21BE471QB2RA Datasheet - Page 90

• Manufacturer Part Number: PRF21BE471QB2RA
• Description: Thermistors - PTC 470 OHM 32V
• Manufacturer: Murata
• Type: PTCr
• Series: PRF21r

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

12
!Note
88
!Caution/Notice
(2) Reflow soldering conditions
(3) There may be a risk of unexpected failures
Continued from the preceding page.
The following figure and table show our recommended
reflow profile.
(a) Insufficient preheating may cause a crack on
(b) The excessive soldering conditions may cause
(c) Rapid cooling by dipping in solvent or by other
(d) Please evaluate it on your condition if you will do
(tombstone, insufficient solder-wetting, etc.) in the
mounting process, caused by the mounting conditions.
Please make sure that this product is correctly
mounted under specified mounting conditions.
• 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.
ceramic body. The temperature difference between
preheat and peak should be control within 100 C to
prevent this.
dissolution of metallization or deterioration of solder-
wetting on the external electrode.
means is not recommended.
mounting using not applying condition to the above-
mentioned.
Temp. ( C)
Preheat
Soldering Time (U220 C)
Peak Temp.
Reflow Cycle
270 C
250 C
220 C
180 C
150 C
90 30s
Standard Profile
Max. 2 times
30 to 60s
250 C
150 to 180 C, 90 30s
30 to 60s
90s
Limit Profile
Max. 2 times
Standard Profile
270 C
Limit Profile
90s
Time (s)
Apr.25,2011
R90E.pdf