NTC Accurate Thermistors
NJ 28 – NI 24 – NK 20
High precision resistance and an outstanding ability to
reproduce the sensibility index B, make these ranges of
products the types of thermistors ideal for temperature
measurement applications.
Leaded or unleaded, these small size and rapid response
time thermistors are able to meet the most accurate
requirements.
Types
NJ 28
NP 30
NI 24
NK 20
Finish
Coated chip with phenolic
resin + varnish
+ tinned copper wires
Coated chip with epoxy
AWG30 insulated leads
+ Silver plated nickel wires
Chip
Coated chip with epoxy
3.0 (.118) max 3.0 (.118) max
2.4 (.094) max 2.4 (.094) max
2.8 (.110) max 2.8 (.110) max
DIMENSIONS:
millimeters (inches)
+10 %
- 15%
+10%
-15%
0.4 (.016)
0.4 (.016)
0.57 (.022) +7%
-7%
1.75 (.069) 0.25 (0.10)
Marking
On packaging only
-55°C to +150°C
1ꢀ, 2ꢀ, 3ꢀ
0.16 W
Operating temperature
Tolerance on Rn (25°C)
Maximum dissipation at 25°C
Thermal dissipation factor*
Thermal time constant
Response time
3 mW/°C
3 mW/°C
2 mW/°C
6 s
8 s
8 s
< 2 s
TABLE OF VALUES
Types
Rn at 25°C (Ω)
2,000
Material Code
B (K)
ꢀ at 25°C (%/°C)
– 4.1
N_ _ _ KA 0202
N_ _ _ MA 0302
N_ _ _ MA 0502
N_ _ _ MA 0103
N_ _ _ NA 0103
N_ _ _ PA 0203
N_ _ _ QA 0503
N_ _ _ RA 0104
KA
MA
MA
MA
NA
PA
3625 1ꢀ
3960 0.5ꢀ
3960 0.5ꢀ
3960 0.5ꢀ
4100 1ꢀ
4235 1ꢀ
4250 1ꢀ
4380 1ꢀ
3,000
– 4.5
5,000
– 4.5
10,000
10,000
20,000
50,000
100,000
– 4.5
– 4.6
– 4.8
QA
RA
– 4.8
– 4.9
* – = Add type as outlined above (Example NJ 2 8).
Resistance - Temperature characteristics: pages 36 to 40.
HOW TO ORDER
NJ28
MA
0502
F--
Type
Material Code
MA
Resistance
Tolerance
F ( 1ꢀ)
5 kΩ
(See table above)
19