PRF18AS471QS2RB Murata, PRF18AS471QS2RB Datasheet - Page 23

• Manufacturer Part Number: PRF18AS471QS2RB
• Manufacturer: Murata

Specifications of PRF18AS471QS2RB

• Lead Free Status / RoHS Status: Compliant

3
!Note
• This PDF catalog is downloaded from the website of Murata Manufacturing co., ltd. Therefore, it’s specifications are subject to change or our products in it may be discontinued without advance notice. Please check with our
• This PDF catalog has only typical specifications because there is no space for detailed specifications. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering.
sales representatives or product engineers before ordering.
!Note
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For NTC Thermistors Lead Type Specifications and Test Methods
1
2
3
4
5
6
7
8
9
•R25 is zero-power resistance of Thermistor in 25°C.
•After each test, NTC Thermistor should be kept for 1 hour at room temperature (normal humidity and normal atmospheric pressure).
Then the resistances (R25 and R50) should be measured and the appearance should be visually examined.
High Temp. Test 1
High Temp. Test 2
Low Temp. Test
Humidity Test
High Temp.
Pressure Test
Heat Shock Test
High Temp.
Continuous Load Test
Humidy Continuous
Load Test
Insulation
Break-down
Voltage
Solvent Proof
Resistance to
Soldering Heat
Solderability
Lead Wire Pull
Strength
Lead Wire
Bending Strength
Drop Test
Vibration
• 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 approve our product specifications or transact the approval sheet for product specifications before ordering.
Item
•Resistance (R25) fluctuation rate less than ±2%
•B-Constant (B25/50) fluctuation rate less than ±1%
•Resistance (R25) fluctuation rate less than ±1%
•B-Constant (B25/50) fluctuation rate less than ±1%
•Resistance (R25) fluctuation rate less than ±2%
•B-Constant (B25/50) fluctuation rate less than ±1%
•Normal appearance
•Normal electrical characteristics on 500Vdc, 1 minute
•Normal appearance
•Resistance (R25) fluctuation rate less than ±1%
•B-Constant (B25/50) fluctuation rate less than ±1%
•Resistance (R25) change less than ±1%
•B-Constant (B25/50) change less than ±1%
More than 90% of lead wire surface should be covered by
solder.
•No visible damage
•Resistance (R25) change less than ±1%
•B-Constant (B25/50) change less than ±1%
No visible damage on lead wire
•No visible damage
•Resistance (R25) change less than ±1%
•B-Constant (B25/50) change less than ±1%
Rating Value
150±2°C in air, for 500 +48/-0 hours without loading
125±3°C in air, for 1000 +48/-0 hours without loading
-40±3°C in air, for 1000 +48/-0 hours without loading
60±2°C, 90-95%RH in air, for 1000 +48/-0 hours without loading
121±2°C, 2atm. in saturated vapor, leave for 2 +1/-0 hours
without loading
-55±3°C, 30 minutes in air
125±2°C, 30 minutes in air (1 cycle)
Continuous 1000 +4/-0 cycles without loading
100±2°C in air, with Permissive Operating Current for 1000
+48/-0 hours
85±2°C, 85%RH in air, with Permissive Operating Current for
1000 +48/-0 hours
2mm length of coating resin from the top of thermistor is to be
dipped into beads of lead (Pb), and D.C 500V is applied to
circuit between beads of lead (Pb) and lead wire.
Using Chlorine Washing Solvents, Boiling, 10 minutes
Supersonic, 10 minutes
Both lead wires are immersed into 350±10°C solder for 3.5±0.5
seconds or 260±5°C solder for 10±1 seconds according to
Fig-1. (solder <JIS Z 3282 H60A>)
Both lead wires are immersed into flux (25wt% colophony <JIS
K 5902> isopropyl alcohol <JIS K 8839>) for 5-10 seconds.
Then both lead wires are immersed into 235±5°C solder <JIS Z
3282 H60A> for 2±0.5 seconds. according to Fig-1.
One end of a lead wire should be fixed and 2.5N force for 10
seconds should be applied to the other lead wire as shown in
Fig-2.
One lead wire is held and 2.5N force is applied.
Then the body of NTC thermistor is bent 90° degrees and again
bent back to the initial position.
This sequence should be completed twice. See Fig-3.
NTC Thermistor should be dropped without any force onto
concrete floor from 1 meter height one time.
NTC Thermistor is to be fixed to the vibration test equipment.
Frequency: 10-2000-10Hz (20 minutes)
Max amplitude: 3.0mm
Vibrated for a period of 4 hours in 3 perpendicular directions
each other (for total of 12 hours.)
Fig-1
Fig-2
Fig-3
Method of Examination
2.5N
90˚
2.5N (10 sec.)
Solder
R03E.pdf
07.3.21