NTC thermistors for
temperature measurement
SMD NTC thermistors,
case size 0805 (2012), standard series
Series/Type:
B574**V2/ B57620C5
Date:
June 2012
The following products presented in this data sheet are being withdrawn.
Ordering Code
B57411V2470+062
B57411V2331+062
B57411V2221+062
Substitute Product
Date of
Withdrawal
2012-11-09
2012-11-09
2012-11-09
Deadline Last
Orders
2013-03-01
2013-03-01
2013-03-01
Last Shipments
2013-06-01
2013-06-01
2013-06-01
© EPCOS AG 2012. Reproduction, publication and dissemination of this publication, enclosures hereto and the
information contained therein without EPCOS' prior express consent is prohibited.
Ordering Code
B57411V2151+062
B57411V2101+062
B57421V2681+062
B57421V2471+062
Substitute Product
Date of
Withdrawal
2012-11-09
2012-11-09
2012-11-09
2012-11-09
Deadline Last
Orders
2013-03-01
2013-03-01
2013-03-01
2013-03-01
Last Shipments
2013-06-01
2013-06-01
2013-06-01
2013-06-01
For further information please contact your nearest EPCOS sales office, which will also support
you in selecting a suitable substitute. The addresses of our worldwide sales network are
presented at www.epcos.com/sales.
Temperature measurement and compensation
B574**V2/ B57620C5
SMD NTC thermistors, case size 0805 (2012)
Applications
Temperature measurement and
compensation
Standard series
Dimensional drawing
Features
Multilayer SMD NTC with inner electrodes
Nickel barrier termination
Excellent long-term aging stability in high
temperature environment
UL approval (E69802)
Options
Alternative resistance ratings, resistance
tolerances and B value tolerances available
on request.
Dimensions in mm
Approx. weight 13 mg
Delivery mode
Blister tape, 180-mm reel (standard);
330-mm reel (on request)
General technical data
Operating temperature range
Max. power
Resistance tolerance
Rated temperature
Dissipation factor
Thermal cooling time constant
Heat capacity
Top
(at 25 °C, on PCB) P251)
∆RR/RR
TR
(on PCB)
δth1)
(on PCB)
τc1)
Cth1)
1) Depends on mounting situation
Please read Cautions and warnings and
Important notes at the end of this document.
Page 2 of 21
55 ... 125
210
±3, ±5
25
approx. 3.5
approx. 10
approx. 35
°C
mW
%
°C
mW/K
s
mJ/K
Temperature measurement and compensation
B574**V2/ B57620C5
SMD NTC thermistors, case size 0805 (2012)
Standard series
Electrical specification and ordering codes
R25
Ω
47
100
150
220
330
470
680
1.0 k
1.0 k
1.5 k
2.2 k
3.3 k
4.7 k
4.7 k
6.8 k
10 k
10 k
10 k
10 k
15 k
22 k
22 k
33 k
33 k
47 k
47 k
100 k
470 k
680 k
No. of R/T
characteristic
8500
8501
8501
8501
8501
8502
8502
1010
8502
8502
8502
8502
8500
8507
8507
1011
8500
8502
8507
8502
8502
8507
8502
8507
8502
8507
8507
8507
8507
B25/50
K
3590
3500
3500
3500
3500
3940
3940
3470
3940
3940
3940
3940
3590
4386
4386
3660
3590
3940
4386
3940
3940
4386
3940
4386
3940
4386
4386
4386
4386
B25/85
K
3635
3540
3540
3540
3540
3980
3980
3514
3980
3980
3980
3980
3635
4455
4455
3720
3635
3980
4455
3980
3980
4455
3980
4455
3980
4455
4455
4455
4455
+ = Resistance tolerance
H = ±3%
J = ±5%
Please read Cautions and warnings and
Important notes at the end of this document.
Page 3 of 21
B25/100
K
3650 ±3%
3550 ±3%
3550 ±3%
3550 ±3%
3550 ±3%
4000 ±3%
4000 ±3%
3530 ±3%
4000 ±3%
4000 ±3%
4000 ±3%
4000 ±3%
3650 ±3%
4480 ±3%
4480 ±3%
3730 ±3%
3650 ±3%
4000 ±3%
4480 ±3%
4000 ±3%
4000 ±3%
4480 ±3%
4000 ±3%
4480 ±3%
4000 ±3%
4480 ±3%
4480 ±3%
4480 ±3%
4480 ±3%
Ordering code
B57411V2470+062
B57411V2101+062
B57411V2151+062
B57411V2221+062
B57411V2331+062
B57421V2471+062
B57421V2681+062
B57620C5102+062
B57421V2102+062
B57421V2152+062
B57421V2222+062
B57421V2332+062
B57401V2472+062
B57471V2472+062
B57471V2682+062
B57620C5103+062
B57401V2103+062
B57421V2103+062
B57471V2103+062
B57421V2153+062
B57421V2223+062
B57471V2223+062
B57421V2333+062
B57471V2333+062
B57421V2473+062
B57471V2473+062
B57471V2104+062
B57471V2474+062
B57471V2684+062
Temperature measurement and compensation
B574**V2/ B57620C5
SMD NTC thermistors, case size 0805 (2012)
Standard series
Reliability data
SMD NTC thermistors are tested in accordance with IEC 60068. The parts are mounted on a
standardized PCB in accordance with IEC 60539-1.
Test
Standard
Storage in
dry heat
IEC
60068-2-2
JIS C 0021
Storage in damp
heat, steady state
Rapid temperature
cycling
Endurance
Solderability
Storage at upper
category temperature
T: (125 ±2) °C
t: 1000 h
IEC
Temperature of air: (40 ±2) °C
60068-2-78 Relative humidity of air:
JIS C 0022 (93 +2/3)%
Duration: 56 days2)
IEC
Lower test temperature: 55 °C
60068-2-14 Upper test temperature: 125 °C
JIS C 0025 Number of cycles: 1003)
Pmax: 210 mW
T: (65 ±2) °C
t: 1000 h
IEC
Solderability:
60068-2-58 (215 ±3) °C, (3 ±0.3) s
JIS C 0054 (245 ±5) °C, (3 ±0.3) s
Resistance drift
after soldering
1)
2)
3)
4)
5)
Test conditions
Resistance to soldering heat:
(260 ±5) °C, (10 ±1) s
Reflow soldering profile
Wave soldering profile
∆R25/R25
(typical)
< 2%1)
< 2%2)
< 2%3)
< 2%4)
95% of
terminations
wetted
< 1%5)
Except B57620C5102+062 ∆R25/R25 (typical): < 6%, B57620C5103+062 ∆R25/R25 (typical): < 3%
Except B57620C5102+062 and B57620C5103+062 duration: 21 days, ∆R25/R25 (typical): < 3%
Except B57620C5102+062 and B57620C5103+062 number of cycles: 10, ∆R25/R25 (typical): < 3%
Except B57620C5102+062 and B57620C5103+062 ∆R25/R25 (typical): < 5%
Except B57620C5102+062 and B57620C5103+062 ∆R25/R25 (typical): < 5%
Please read Cautions and warnings and
Important notes at the end of this document.
Page 4 of 21
Remarks
Temperature measurement and compensation
B574**V2/ B57620C5
SMD NTC thermistors, case size 0805 (2012)
Standard series
R/T characteristics
R/T No.
T (°C)
1010
1011
8500
B25/100 = 3530 K
B25/100 = 3730 K
B25/100 = 3650 K
RT/R25
α (%/K) RT/R25
α (%/K) RT/R25
α (%/K)
55.0
50.0
45.0
40.0
35.0
52.826
38.643
28.574
21.346
16.1
6.4
6.1
5.9
5.7
5.5
70.014
49.906
36.015
26.296
19.411
6.9
6.7
6.4
6.2
6.0
63.917
45.889
33.344
24.504
18.201
6.8
6.5
6.3
6.1
5.8
30.0
25.0
20.0
15.0
10.0
12.256
9.4071
7.2862
5.6835
4.4698
5.4
5.2
5.0
4.9
4.7
14.479
10.903
8.2923
6.3591
4.9204
5.8
5.6
5.4
5.2
5.1
13.657
10.347
7.9114
6.1019
4.7454
5.6
5.5
5.3
5.1
4.9
5.0
0.0
5.0
10.0
15.0
3.5385
2.8222
2.2649
1.83
1.4872
4.6
4.5
4.3
4.2
4.1
3.8279
3.0029
2.3773
1.8959
1.5207
4.9
4.8
4.6
4.5
4.3
3.7198
2.938
2.3372
1.8722
1.5096
4.8
4.6
4.5
4.4
4.2
20.0
25.0
30.0
35.0
40.0
1.2161
1.0000
0.82677
0.68708
0.57401
4.0
3.9
3.8
3.6
3.5
1.228
1.0000
0.81779
0.67341
0.55747
4.2
4.1
3.9
3.8
3.7
1.2249
1.0000
0.82111
0.67798
0.56279
4.1
4.0
3.9
3.8
3.7
45.0
50.0
55.0
60.0
65.0
0.48181
0.40638
0.34427
0.29296
0.25035
3.5
3.4
3.3
3.2
3.1
0.46357
0.3874
0.32368
0.272
0.23041
3.6
3.6
3.5
3.4
3.3
0.46958
0.39374
0.33171
0.28073
0.23863
3.6
3.5
3.4
3.3
3.2
70.0
75.0
80.0
85.0
90.0
0.21478
0.18501
0.15995
0.13881
0.12088
3.0
2.9
2.9
2.8
2.7
0.19604
0.16735
0.14342
0.12347
0.10668
3.2
3.1
3.0
3.0
2.8
0.2037
0.17459
0.15022
0.12975
0.11247
3.1
3.0
3.0
2.9
2.8
95.0
100.0
105.0
110.0
115.0
0.10563
0.092597
0.081442
0.071842
0.063571
2.7
2.6
2.5
2.5
2.4
0.092734
0.080903
0.070616
0.061826
0.054282
2.8
2.8
2.7
2.6
2.6
0.097838
0.085396
0.074781
0.065691
0.057883
2.8
2.7
2.6
2.6
2.5
120.0
125.0
130.0
135.0
140.0
0.056407
0.050196
2.4
2.3
0.047793
0.042249
2.5
2.4
0.051153
0.045335
0.040289
0.0359
0.032071
2.4
2.4
2.3
2.3
2.2
0.028723
0.025786
2.2
2.1
145.0
150.0
Please read Cautions and warnings and
Important notes at the end of this document.
Page 5 of 21
Temperature measurement and compensation
B574**V2/ B57620C5
SMD NTC thermistors, case size 0805 (2012)
Standard series
R/T characteristics
R/T No.
T (°C)
8501
8502
8507
B25/100 = 3550 K
B25/100 = 4000 K
B25/100 = 4480 K
RT/R25
α (%/K) RT/R25
α (%/K) RT/R25
α (%/K)
55.0
50.0
45.0
40.0
35.0
56.633
41.134
30.209
22.42
16.807
6.5
6.3
6.1
5.9
5.7
96.158
66.892
47.127
33.606
24.243
7.4
7.1
6.9
6.6
6.4
30.0
25.0
20.0
15.0
10.0
12.721
9.7156
7.4854
5.8152
4.5537
5.5
5.3
5.1
5.0
4.8
17.681
13.032
9.702
7.2923
5.5314
6.2
6.0
5.8
5.6
5.4
23.213
16.686
12.115
8.8803
6.5692
6.7
6.5
6.3
6.1
5.9
5.0
0.0
5.0
10.0
15.0
3.5931
2.8558
2.2857
1.8416
1.4934
4.7
4.5
4.4
4.3
4.1
4.2325
3.2657
2.54
1.9907
1.5716
5.3
5.1
4.9
4.8
4.7
4.9025
3.6896
2.7994
2.1406
1.6492
5.8
5.6
5.4
5.3
5.1
20.0
25.0
30.0
35.0
40.0
1.2184
1.0000
0.82537
0.68495
0.57139
4.0
3.9
3.8
3.7
3.6
1.2494
1.0000
0.80552
0.65288
0.53229
4.5
4.4
4.3
4.1
4.0
1.2798
1.0000
0.78663
0.62277
0.4961
5.0
4.9
4.7
4.6
4.5
45.0
50.0
55.0
60.0
65.0
0.47905
0.40358
0.34158
0.2904
0.24795
3.5
3.4
3.3
3.2
3.1
0.43645
0.35981
0.29819
0.24837
0.20787
3.9
3.8
3.7
3.6
3.5
0.39757
0.32044
0.2597
0.21161
0.17331
4.4
4.3
4.1
4.0
3.9
70.0
75.0
80.0
85.0
90.0
0.21259
0.183
0.15813
0.13715
0.11938
3.0
3.0
2.9
2.8
2.7
0.17479
0.14763
0.12523
0.10667
0.091227
3.4
3.3
3.2
3.2
3.1
0.14265
0.11799
0.098035
0.081823
0.068589
3.8
3.8
3.7
3.6
3.5
95.0
100.0
105.0
110.0
115.0
0.10427
0.091375
0.080333
0.070846
0.062666
2.7
2.6
2.5
2.5
2.4
0.078319
0.067488
0.058363
0.050647
0.044098
3.0
2.9
2.9
2.8
2.7
0.057735
0.048796
0.041403
0.035263
0.030143
3.4
3.3
3.2
3.2
3.1
120.0
125.0
130.0
135.0
140.0
0.055592
0.049454
2.4
2.3
0.03852
0.033752
0.029663
0.026146
0.023111
2.7
2.6
2.6
2.5
2.4
0.025858
0.022258
0.019223
0.016655
0.014476
3.0
3.0
2.9
2.8
2.8
0.020484
0.018203
2.4
2.3
0.012619
0.011033
2.7
2.7
145.0
150.0
Please read Cautions and warnings and
Important notes at the end of this document.
Page 6 of 21
142.71
96.913
66.637
46.366
32.629
7.9
7.6
7.4
7.1
6.9
Temperature measurement and compensation
B574**V2/ B57620C5
SMD NTC thermistors, case size 0805 (2012)
Taping and packing
1
Taping of SMD NTC thermistors
1.1
Cardboard tape for case size 0402 and 0603 (taping to IEC 60286-3)
Dimensions (mm)
Case size
0402
(8-mm tape)
Case size
0603
(8-mm tape)
Tolerance
A0 × B0
0.60 × 1.15
0.95 × 1.80
±0.2
T2
0.70
1.10
T
0.60
0.90
max.
D0
1.50
1.50
±0.10
P0
4.00
4.00
±0.101)
P2
2.00
2.00
±0.05
P1
2.00
4.00
±0.10
W
8.00
8.00
±0.30
E
1.75
1.75
±0.10
F
3.50
3.50
±0.05
G
0.75
0.75
min.
1) ≤0.2 mm over 10 sprocket holes.
Please read Cautions and warnings and
Important notes at the end of this document.
Page 7 of 21
Standard series
Temperature measurement and compensation
B574**V2/ B57620C5
SMD NTC thermistors, case size 0805 (2012)
1.2
Blister tape for case size 0805 and 1206 (taping to IEC 60286-3)
Dimensions (mm)
Case size
0805
(8-mm tape)
Case size
1206
(8-mm tape)
Tolerance
A0 × B0
1.60 × 2.40
1.90 × 3.50
±0.2
K0
1.40
1.40
max.
T2
2.5
2.5
max.
D0
1.50
1.50
+0.10/–0
D1
1.00
1.00
min.
P0
4.00
4.00
±0.102)
P2
2.00
2.00
±0.05
P1
4.00
4.00
±0.10
W
8.00
8.00
±0.30
E
1.75
1.75
±0.10
F
3.50
3.50
±0.05
G
0.75
0.75
min.
2) ≤0.2 mm over 10 sprocket holes.
Please read Cautions and warnings and
Important notes at the end of this document.
Page 8 of 21
Standard series
Temperature measurement and compensation
B574**V2/ B57620C5
SMD NTC thermistors, case size 0805 (2012)
1.3
Standard series
Reel packing
Packing survey
Case
size
Chip 8-mm tape
thickness3)
Reel dimensions
Packing units
mm
mm
pcs./reel
Blister Card- A
board
Tol.
W1
Tol.
W2
180-mm 330-mm
reel
reel
0402
0.5
x
180
3/+0
8.4
+1.5/0
14.4 max.
10000
0603
0.8
x
180
3/+0
8.4
+1.5/0
14.4 max.
4000
330
±2.0
12.4
+1.5/0
18.4 max.
16000
0805
0.8
x
8.4
12.4
+1.5/0
+1.5/0
14.4 max.
18.4 max.
16000
x
3/+0
±2.0
4000
1.2
180
330
3000
12000
0.8
x
180
2/+0
8.4
+1.5/0
14.4 max.
4000
1.2
x
180
2/+0
8.4
+1.5/0
14.4 max.
2000
1206
3) Chip thickness depends on the resistance value.
Please read Cautions and warnings and
Important notes at the end of this document.
Page 9 of 21
Temperature measurement and compensation
B574**V2/ B57620C5
SMD NTC thermistors, case size 0805 (2012)
2
Standard series
Packing codes
The last two digits of the complete ordering code state the packing mode:
Last two digits
60
SMD
Cardboard tape
180-mm reel packing
62
SMD
Blister tape
180-mm reel packing
70
SMD
Cardboard tape
330-mm reel packing
72
SMD
Blister tape
330-mm reel packing
Please read Cautions and warnings and
Important notes at the end of this document.
Page 10 of 21
Temperature measurement and compensation
SMD NTC thermistors, case size 0805 (2012)
B574**V2/ B57620C5
Standard series
Mounting instructions
1
Soldering
1.1
SMD NTC thermistors
SMD NTC thermistors can be provided with a nickel barrier termination or on special request with
silver-palladium termination. The usage of mild, non-activated fluxes for soldering is recommended as well as a proper cleaning of the PCB.
The nickel barrier layer of the silver/nickel/tin termination (see figure 1) prevents leaching of the
silver base metalization layer. This allows great flexibility in the selection of soldering parameters.
The tin prevents the nickel layer from oxidizing and thus ensures better wetting by the solder. The
nickel barrier termination is suitable for all commonly-used soldering methods.
Note: SMD NTCs with AgPd termination are not approved for lead-free soldering.
Figure 1
SMD NTC thermistors, structure of nickel barrier termination
1.1.1
Solderability (test to IEC 60068-2-58)
Preconditioning: Immersion into flux F-SW 32.
Evaluation criterion: Wetting of soldering areas ≥95%.
Solder
Bath temperature (°C)
Dwell time (s)
SnPb 60/40
215 ±3
3 ±0.3
SnAg (3.0 ... 4.0), Cu (0.5 ... 0.9)
245 ±3
3 ±0.3
1.1.2
Resistance to soldering heat (test to IEC 60068-2-58)
Preconditioning: Immersion into flux F-SW 32.
Evaluation criterion: Leaching of side edges ≤1/3.
Solder
Bath temperature (°C)
Dwell time (s)
SnPb 60/40
260 ±5
10 ±1
SnAg (3.0 ... 4.0), Cu (0.5 ... 0.9)
260 ±5
10 ±1
Please read Cautions and warnings and
Important notes at the end of this document.
Page 11 of 21
Temperature measurement and compensation
B574**V2/ B57620C5
SMD NTC thermistors, case size 0805 (2012)
Wave soldering
Temperature characteristic at component terminal with dual wave soldering
Solder joint profiles for silver/nickel/tin terminations
Please read Cautions and warnings and
Important notes at the end of this document.
Page 12 of 21
Standard series
Temperature measurement and compensation
B574**V2/ B57620C5
SMD NTC thermistors, case size 0805 (2012)
Standard series
Reflow soldering
Recommended temperature characteristic for reflow soldering following JEDEC J-STD-020D
Profile feature
Preheat and soak
- Temperature min
- Temperature max
- Time
Average ramp-up rate
Liquidous temperature
Time at liquidous
Peak package body temperature
Time (tP)3) within 5 °C of specified
classification temperature (Tc)
Average ramp-down rate
Time 25 °C to peak temperature
Tsmin
Tsmax
tsmin to tsmax
Tsmax to Tp
TL
tL
Tp1)
Tp to Tsmax
Sn-Pb eutectic assembly
Pb-free assembly
100 °C
150 °C
60 ... 120 s
3 °C/ s max.
183 °C
60 ... 150 s
220 °C ... 235 °C2)
150 °C
200 °C
60 ... 180 s
3 °C/ s max.
217 °C
60 ... 150 s
245 °C ... 260 °C2)
20 s3)
30 s3)
6 °C/ s max.
maximum 6 min
6 °C/ s max.
maximum 8 min
1) Tolerance for peak profile temperature (TP) is defined as a supplier minimum and a user maximum.
2) Depending on package thickness. For details please refer to JEDEC J-STD-020D.
3) Tolerance for time at peak profile temperature (tP) is defined as a supplier minimum and a user maximum.
Note: All temperatures refer to topside of the package, measured on the package body surface.
Number of reflow cycles: 3
Please read Cautions and warnings and
Important notes at the end of this document.
Page 13 of 21
Temperature measurement and compensation
SMD NTC thermistors, case size 0805 (2012)
B574**V2/ B57620C5
Standard series
Solder joint profiles for silver/nickel/tin terminations
1.1.3
Recommended geometry of solder pads
Recommended maximum dimensions (mm)
Case size
inch/mm
A
B
C
0402/1005
0.6
0.6
1.7
0603/1608
1.0
1.0
3.0
0805/2012
1.3
1.2
3.4
1206/3216
1.8
1.2
4.5
1.1.4
Notes
Iron soldering should be avoided, hot air methods are recommended for repair purposes.
Please read Cautions and warnings and
Important notes at the end of this document.
Page 14 of 21
Temperature measurement and compensation
SMD NTC thermistors, case size 0805 (2012)
2
B574**V2/ B57620C5
Standard series
Conductive adhesion
An alternative to soldering is the gluing of thermistors with conductive adhesives. The benefit of
this method is that it involves no thermal stress. The adhesives used must be chemically inert.
3
Clamp contacting
Pressure contacting by means of clamps is particularly suitable for applications involving frequent
switching and high turn-on powers.
4
Sealing and potting
When thermistors are sealed, potted or overmolded, there must be no mechanical stress caused
by thermal expansion during the production process (curing / overmolding process) and during
later operation. The upper category temperature of the thermistor must not be exceeded. Ensure
that the materials used (sealing / potting compound and plastic material) are chemically neutral.
5
Cleaning
If cleaning is necessary, mild cleaning agents such as ethyl alcohol and cleaning gasoline are
recommended. Cleaning agents based on water are not allowed. Ultrasonic cleaning methods are
permissible.
6
Storage
In order to maintain their solderability, thermistors must be stored in a non-corrosive atmosphere.
Humidity, temperature and container materials are critical factors.
Do not store SMDs where they are exposed to heat or direct sunlight. Otherwise, the packing material may be deformed or SMDs may stick together, causing problems during mounting. After
opening the factory seals, such as polyvinyl-sealed packages, use the SMDs as soon as possible.
The components should be left in the original packing. Touching the metallization of unsoldered
thermistors may change their soldering properties.
Storage temperature:
25 °C up to 45 °C
Relative humidity (without condensation):
≤75% annual mean
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