19
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 Coated chip with epoxy Chip
resin + varnish Coated chip with epoxy AWG30 insulated leads
+ tinned copper wires + Silver plated nickel wires
Marking On packaging only
Operating temperature -55°C to +150°C
Tolerance on Rn (25°C) ±1%, ±2%, ±3%
Maximum dissipation at 25°C 0.16 W
Thermal dissipation factor* 3 mW/°C 3 mW/°C 2 mW/°C
Thermal time constant 8 s 8 s 6 s
Response time < 2 s
NTC Accurate Thermistors
NJ 28 – NI 24 – NK 20
TABLE OF VALUES
Types Rn at 25°C (Ω) Material Code B (K) at 25°C (%/°C)
N_ _ _ KA 0202 2,000 KA 3625 ± 1% – 4.1
N_ _ _ MA 0302 3,000 MA 3960 ± 0.5% – 4.5
N_ _ _ MA 0502 5,000 MA 3960 ± 0.5% – 4.5
N_ _ _ MA 0103 10,000 MA 3960 ± 0.5% – 4.5
N_ _ _ NA 0103 10,000 NA 4100 ± 1% – 4.6
N_ _ _ PA 0203 20,000 PA 4235 ± 1% – 4.8
N_ _ _ QA 0503 50,000 QA 4250 ± 1% – 4.8
N_ _ _ RA 0104 100,000 RA 4380 ± 1% – 4.9
2.8 (.110) max 2.8 (.110) max
35 (1.38) min
3 (.118) max
0.4 (.016) +10 %
- 15%
2.4 (.094) max 2.4 (.094) max
35 (1.38) min
3 (.118) max
0.57 (.022) +7%
-7%
3.0 (.118) max 3.0 (.118) max
35 (1.38) min
3 (.118) max
0.4 (.016) +10%
-15%
0.75 (.030) ± 0.25 (.010)
1.75 (.069) ± 0.25 (0.10)
1.75 (.069)
± 0.25 (0.10)
HOW TO ORDER
NJ28
Type
MA
Material Code
MA
(See table above)
0502
Resistance
5 kΩ
F--
Tolerance
F (±1%)
* – = Add type as outlined above (Example NJ 2 8).
Resistance - Temperature characteristics: pages 36 to 40.
DIMENSIONS:
millimeters (inches)
20
NTC Thermistors
Manufacturing Process
NJ 28 – NI 24 – NK 20
