LEADEMC ELECTRONICS CO., LTD.
Polymeric Positive Temperature Coefficient
www.leademc.com 1 / 4
JK250 SERIES
FEATURE
Radial leaded Devices
Cured, flame retardant epoxy polymer insulating material meets UL94V-0
Bulk packaging, or tape and reel available on most models
Agency recognition: UL、CSA、TUV
RoHS compliant and lead-free
AGENCY APPROVALS
UL：E217453
TUV: R50158898
THERMAL DERATING CHART-IH(A)
Model
Maximum ambient operating temperatures（℃）
-40℃ -20℃ 0℃ 25℃ 30℃ 40℃ 50℃ 60℃ 70℃ 85℃
JK-250 Series 148% 132% 117% 100% 91% 85% 77% 68% 61% 45%
ENVIRONMENTAL SPECIFICATIONS
Test Conditions Resistance change
Passive aging
+85℃，1000hrs
±8% typical
Humidity aging
+85℃，85%R.H.1000hrs
±8% typical
Thermal shock
+125℃ to -55℃，10times
±12% typical
Resistance to solvent
MIL-STD-202，Method 215
No change
Vibration
MIL-STD-202，Method 201
No change
MARKING
JK
XX
XXX
IHOLD
VMAX
JK Series Production
LEADEMC ELECTRONICS CO., LTD.
Polymeric Positive Temperature Coefficient
www.leademc.com 2 / 4
JK250 SERIES
ELECTRICAL CHARACTERISTICS
Part Number
IH IT Vmax Imax
Max.
Time-to-trip
PdTyp RMin RMax
（mA） （mA） （V） （A） （A） （S） （W） （Ω） （Ω）
JK250-020U 20 45 250
3
0.5 0.5 1.0 80 160
JK250-030U 30 65 250
3
0.5 0.5 1.0 60 120
JK250-040U 40 80 250
3
0.5 1.5 1.0 30 60
JK250-050U 50 100 250
3
0.5
2
1.0 25 50
JK250-060U 60 120 250
3
0.5
2
.0 1.0 20 60
JK250-080U 80 160 250
3
1
0.5 1.0 12 22
JK250-090U 90 180 250
3
1
0.8 1.0 10 20
JK250-100U 100 200 250
3
1
1
.0 1.0 10 20
JK250-110U 110 220 250
3
1
2.0 1.0 6.0 12
JK250-120U 120 240 250
3
1
2.0 1.0 6.0 11
JK250-145U 145 290 250
3
1
5.0 1.0 3.5 6.5
JK250-180T 180 650 250 3 3 3.0 1.8 1.0 2.2
JK250-180U 180 650 250 3 3 1.5 1.8 2.0 4.0
JK250-200U 200 400 250 5 3 5.0 2.4 3.0 6.0
JK250-400U 400 800 250 5 3 8.0 2.8 1.0 3.0
JK250-600U 600 1200 250 5 3 12 3.2 0.6 2.0
JK250-800U 800 1600 250 5 4 18 3.6 0.4 1.0
JK250-1000U 1000 2000 250 7 5 20 3.6 0.3 0.8
JK250-1200U 1200 2400 250 7 6 20 3.6 0.2 0.8
JK250-1500U 1500 3000 250 7 7.5 20 4.8 0.2 0.6
JK250-2000U 2000 4000 250 10 10 20 4.8 0.2 0.4
I
H
= Hold Current. Maximum current device will not trip in 25°C still air.
I
T
= Trip Current. Minimum current at which the device will always trip in 25°C still air.
V
max
= Maximum operating voltage device can withstand without damage at rated current (Imax).
I
max
= Maximum fault current device can withstand without damage at rated voltage (V max).
T
trip
= Maximum time to trip at assigned current.
Pd
typ
= Typical power dissipation when device is in the tripped state in 25°C still air environment at rated voltage
R
min
= Minimum device resistance at 25℃ prior to tripping.
R
max
= Maximum device resistance at 25℃ prior to tripping.