1 GENERAL
GENERAL
This specification defines characteristics dimension and main condition of the NTC thermistor SJMF5A-3.
This specification defines characteristics dimension and main condition of the NTC thermistor SJMF5A-3.
2 THERMISTOR CHARACTERISTICS
THERMISTOR CHARACTERISTICS
Item Char. Unit Tol.
Sign.
2.1
Resistance
2.2
3270 3400 3470 3470 3950 3950 3950 3990 3950 3950 4380
B-value
2.3
10 10 10 10 10 10 10 10 10 10
Thermal time constant
2.4
min
Dissipationonstant
3
3.1 Operating temp.
3.1 Operating temp.
(Tw):
(Tw):
placed for 1000 hours,at 100 (in air)
placed for 1000 hours,at 100 (in air)
R/R 2%
R/R 2%
3.2 (I max):
3.2 (I max):
Maximum current
Maximum current
1.0mA
1.0mA
3.3 Maximum power (P max): 5mW
3.3 Maximum power (P max): 5mW
placed for 1000 hours,at -30 (in air)
placed for 1000 hours,at -30 (in air)
R/R 2%
R/R 2%
4 Shape and dimension
Shape and dimension
40 -95% R.H., placed r 1000 hours.
40 -95% R.H., placed r 1000 hours.
Unit mm
Unit mm
R/R 2%
R/R 2%
3
3
2
2
1
1
1.0mA 40 days.
1.0mA 40 days.
R/R 2%
R/R 2%
7
7
Control the air temperature blowed the thermistor head
Control the air temperature blowed the thermistor head
to Max. 25 when adding a hea otecting
to Max. 25 when adding a hea shrink pr tube .
0 t shrink pr
0 t otecting tube .
Specification & material
Specification & material
NO.
NO.
And the ou lower be of so
And the ou of hot air b should be of so distance
tlet of hot air b me distance
tlet lower should me
Chip thermistor
Chip thermistor
1.
1.
to the ther ssively Over hea
to the ther lest exce heated. Over hea shock
mistor lest exce t shock
mistor ssively heated. t
Epoxy resin
Epoxy resin
2.
2.
will cause resistance value drift.
will cause resistance value drift.
0.4 CP/Sn Wire
0.4 CP/Sn Wire
3.
3.
6 Reliability characteristics test
6 Reliability characteristics test
R/R 2%
R/R 2%
2.3
0.4
2.3
0.4
2.4
0.4
2.4
0.4