BC Components
Product specification
NTC thermistors, accuracy line
FEATURES
•
Accuracy over a wide temperature
range
•
High stability over a long life
•
Excellent price/performance ratio.
APPLICATION
•
Temperature sensing and control.
DESCRIPTION
These thermistors have a negative
temperature coefficient. The device
consists of a chip with two tinned solid
copper-plated leads. It is grey
lacquered and colour coded, but not
insulated.
MARKING
The thermistors are marked with
colour bands in accordance with
Fig.1 and Table 3.
MOUNTING
By soldering in any position.
QUICK REFERENCE DATA
PARAMETER
Resistance value at 25
°C
Tolerance on R
25
-value
Tolerance on B
25/85
-value
Maximum dissipation
Response time
Operating temperature range:
at zero dissipation; continuously
at zero dissipation; for short periods
at maximum dissipation (500 mW)
Climatic category
Mass
2322 640 6....
VALUE
3.3
Ω
to 470 kΩ
±2%; ±3%; ±5%; ±10%
±0.5%
to
±3%
500 mW
1.2 s
−40
to +125
°C
≤150 °C
0 to 55
°C
40/125/56
≈0.22
g
1998 Sep 04
36
BC Components
Product specification
NTC thermistors, accuracy line
MECHANICAL DATA
Outline
2322 640 6....
handbook, 4 columns
,, ,,
,
,,,
,,,
,,
,,,
,,,
,,, ,,
B
T
L
d
P
Ι
ΙΙ
ΙΙΙ
ΛΙ
H
2
H
1
CCB281
For dimensions see Table 1.
Fig.1 Component outline 2322 640 6.331 to 6.474.
Table 1
Physical dimensions for relevant type; see Fig.1
B
max
(mm)
3.3
±0.5
5.0
d
(mm)
MIN.
0.6
±0.06
0.6
±0.06
−
1.0
H
1
(mm)
MAX.
2.0
±1.0
4.0
6.0
6.0
24
±1.5
24
±1.5
2.54
2.54
3.0
4.0
H
2 max
(mm)
L
(mm)
P
(mm)
T
max
(mm)
CODE NUMBER
2322 640 .....
6.331 to 6.474
6.338 to 6.221
1998 Sep 04
37
BC Components
Product specification
NTC thermistors, accuracy line
ORDERING INFORMATION
Table 2
Code numbers and relevant packaging quantities
BULK
PARAMETER
2322 640 6....
Quantity
Note
500
TAPE AND REEL
(1)
1e pitch
2322 640 4....
1500 per reel, 2 reels per box
2322 640 6....
TAPE AND REEL
(1)
2e pitch
2322 640 3....
1500 per reel, 2 reels per box
1. The maximum number of empty places per reel shall not exceed 0.5% of the total number of components per reel.
No more than three consecutive positions may be vacant.
Table 3
R
25
(Ω)
3.3
4.7
6.8
10
15
22
33
47
68
100
150
220
330
470
680
1000
1500
2000
2200
R
25
-values, catalogue numbers and coding
CATALOGUE NUMBER 2322 640 6....
B
25/85
-VALUE
R
25
±2%
2880 K
±3%
2880 K
±3%
2880 K
±3%
2990 K
±3%
3041 K
±3%
3136 K
±3%
3390 K
±3%
3390 K
±3%
3390 K
±3%
3560 K
±0.75%
3560 K
±0.75%
3560 K
±0.75%
3560 K
±0.75%
3560 K
±0.5%
3560 K
±0.5%
3528 K
±0.5%
3528 K
±0.5%
3528 K
±0.5%
3977 K
±0.75%
4338
4478
4688
4109
4159
4229
4339
4479
4689
4101
4151
4221
4331
4471
4681
4102
4152
4202
4222
R
25
±3%
6338
6478
6688
6109
6159
6229
6339
6479
6689
6101
6151
6221
6331
6471
6681
6102
6152
6202
6222
R
25
±5%
3338
3478
3688
3109
3159
3229
3339
3479
3689
3101
3151
3221
3331
3471
3681
3102
3152
3202
3222
R
25
±10%
2338
2478
2688
2109
2159
2229
2339
2479
2689
2101
2151
2221
2331
2471
2681
2102
2152
2202
2222
COLOUR CODE
(see Fig.1 and note 1)
I
orange
yellow
blue
brown
brown
red
orange
yellow
blue
brown
brown
red
orange
yellow
blue
brown
brown
red
red
II
orange
violet
grey
black
green
red
orange
violet
grey
black
green
red
orange
violet
grey
black
green
black
red
III
gold
gold
gold
black
black
black
black
black
black
brown
brown
brown
brown
brown
brown
red
red
red
red
1998 Sep 04
38
BC Components
Product specification
NTC thermistors, accuracy line
2322 640 6....
R
25
(Ω)
2700
3300
4700
6800
10000
12000
15000
22000
33000
47000
68000
100000
150000
220000
330000
470000
Note
CATALOGUE NUMBER 2322 640 6....
B
25/85
-VALUE
R
25
±2%
3977 K
±0.75%
3977 K
±0.75%
3977 K
±0.75%
3977 K
±0.75%
3977 K
±0.75%
3740 K
±2%
3740 K
±2%
3740 K
±2%
4090 K
±1.5%
4090 K
±1.5%
4190 K
±1.5%
4190 K
±1.5%
4370 K
±2.5%
4370 K
±2.5%
4570 K
±1.5%
4570 K
±1.5%
4272
4332
4472
4682
4103
4123
4153
4223
4333
4473
4683
4104
4154
4224
4334
4474
R
25
±3%
6272
6332
6472
6682
6103
6123
6153
6223
6333
6473
6683
6104
6154
6224
6334
6474
R
25
±5%
3272
3332
3472
3682
3103
3123
3153
3223
3333
3473
3683
3104
3154
3224
3334
3474
R
25
±10%
2272
2332
2472
2682
2103
2123
2153
2223
2333
2473
2683
2104
2154
2224
2334
2474
COLOUR CODE
(see Fig.1 and note 1)
I
red
orange
yellow
blue
brown
brown
brown
red
orange
yellow
blue
brown
brown
red
orange
yellow
II
violet
orange
violet
grey
black
red
green
red
orange
violet
grey
black
green
red
orange
violet
III
red
red
red
red
orange
orange
orange
orange
orange
orange
orange
yellow
yellow
yellow
yellow
yellow
1. Dependent upon R
25
-tolerance, the band IV is coloured as follows:
a) for R
25
±2%,
band IV is coloured red
b) for R
25
±3%,
band IV is coloured orange
c) for R
25
±5%,
band IV is coloured gold
d) for R
25
±10%,
band IV is coloured silver.
1998 Sep 04
39
BC Components
Product specification
NTC thermistors, accuracy line
R
T
value and tolerance
These thermistors have a narrow tolerance on the B-value,
the result of which provides a very small tolerance on the
nominal resistance value over a wide temperature range.
For this reason the usual graphs of R = f(T) are replaced
by Tables 5 through 17, together with a formula to
calculate the characteristics with a high precision.
Formulae to determine nominal resistance values
(1)
The resistance values at intermediate temperatures, or the
operating temperature values, can be calculated using the
following interpolation laws (extended
“Steinhart and
Hart”):
R (T)
=
R
ref
×
e
A
+
B
⁄
T
+
C
⁄
T
+
D
⁄
T
2
3
2322 640 6....
Determination of the resistance/temperature
deviation from nominal value
The total resistance deviation is obtained by combining the
‘R
25
-tolerance’ and the ‘resistance deviation due to
B-tolerance’.
When:
X = R
25
-tolerance
Y = resistance deviation due to B-tolerance
Z = complete resistance deviation,
X
Y
then: Z
=
1
+
---------
×
1
+
---------
–
1
-
-
100
100
or Z
≈
X + Y.
When:
TC = temperature coefficient
(2)
∆T
= temperature deviation,
Z
then:
∆T
=
-------
-
TC
The temperature tolerances are plotted in
Figs 3, 4, 5, 6, 7 and 8.
Example:
at 0
°C,
assume X = 5%, Y = 0.89% and
TC = 5.08%/K (see Table 12), then:
5
Z
=
{
1
+
---------
-
100
0.89
×
1
+
----------
–
1
} ×
100%
-
100
×
100 %
(1)
2
R
3
R
–
1
R
T (R) =
A
1
+
B
1
ln ---------
+
C
1
ln ---------
+
D
1
ln ---------
-
-
-
R
ref
R
ref
R
ref
where:
A, B, C, D, A
1
, B
1
, C
1
and D
1
are constant values
depending on the material concerned; see Table 4.
R
ref
is the resistance value at a reference temperature
(in this event 25
°C).
T is the temperature in K.
˙
=
{
1.05
×
1.0089
–
1
} ×
100%
=
5.9345%
( ≈
5.93%
)
Z
5.93
∆T
=
-------
=
----------
=
1.167
°C ( ≈
1.17
°
C
)
-
-
TC 5.08
(1) Formulae numbered (1) and (2) are interchangeable with an
error of max. 0.005
°C
in the range 25
°C
to 125
°C
and
max. 0.015
°C
in the range
−40 °C
to +25
°C.
A NTC with a R
25
-value of 10 kΩ has a value of 32.56 kΩ
between
−1.17
and +1.17
°C.
1998 Sep 04
40
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