BETTER ELECTRONICS
TECHNOLOGY CO., LTD
东莞市贝特电子科技股份有限公司
www.betterfuse.com
China sales:
Jacky Huang
sls01@betterfuse.com
+86 769-83238731 ext.859
Japan sales:
Li Ling
lynn.li@betterfuse.com
+86-769-2307 8207
BJK250 Series PPTC Fuse
Europe sales:
Helge Glueck
helge@betterfuse.com
+49-341-946 98772
South Korea sales:
Jenny Li
sm12@betterfuse.com
+86 769-2307 8212
Features
Radial leaded PTC fuse
Treated, flame retardant epoxy
polymer insulating material, meets
UL94V-0 requirements
Bulk packaging, tape and reel
available for most models
Electrical Characteristics (@ 25Ԩ)
Part Number
I
hold
(mA)
I
trip
(mA)
V
max
OP
(V
dc
)
V
max
Interrupt
(V
rms
)
I
max
(A)
P
d
Typ
(W)
Maximum Time
To Trip
Resistance
Current
(A)
Time
(s)
R
min
(Ω)
R
max
(Ω)
R
1max
(Ω)
BJK250-020U 20 45 60 250V 3.0 1.0 0.5 0.4 80 160 240
BJK250-030U 30 65 60 250V 3.0 1.0 0.5 0.5 60 120 180
BJK250-040U 40 80 60 250V 3.0 1.0 0.5 1.0 30 60 100
BJK250-060U 60 120 60 250V 3.0 1.0 0.5 0.5 20 60 90
BJK250-080U 80 160 60 250V 3.0 1.0 1.0 0.4 14 22 33
BJK250-090U 90 180 60 250V 3.0 1.0 1.0 0.5 10 20 31
BJK250-100U 100 200 60 250V 3.0 1.0 1.0 1.0 10 20 31
BJK250-110U 110 220 60 250V 3.0 1.0 1.0 1.2 6 12 16
BJK250-120 120 240 60 250V 3.0 1.0 1.0 1.2 5 10 14
BJK250-120U 120 240 60 250V 3.0 1.0 1.0 1.2 6 11 16
BJK250-145U 145 290 60 250V 3.0 1.0 1.0 4.0 3.5 6.5 14
BJK250-180T 180 650 60 250V 10.0 1.8 3.0 1.5 1.0 2.2 4
BJK250-180U 180 650 60 250V 10.0 1.8 3.0 1.5 1 3 5
BJK250-200U 200 400 60 250V 10.0 2.4 3.0 5.0 3 6 9
BJK250-400U 400 800 60 250V 10.0 2.8 3.0 8.0 1 3 6
BJK250-600U 600 1200 60 250V 10.0 3.2 3.0 12.0 0.6 2.0 5
BJK250-800U 800 1600 60 250V 10.0 3.6 5.0 18.0 0.4 1.0 3
BJK250-1000U 1000 2000 60 250V 10.0 3.6 5.0 20.0 0.3 0.8 2
BJK250-1200U 1200 2400 60 250V 10.0 3.6 6.0 20.0 0.2 0.8 2
BJK250-1500U 1500 3000 60 250V 10.0 4.8 7.5 20.0 0.2 0.6 1.5
BJK250-2000U 2000 4000 60 250V 10.0 4.8 10.0 20.0 0.2 0.4 1.5
I
hold
Hold current：Maximum current the thermistor will sustain without tripping at 25Ԩ ambient temperature for 1hr
I
trip
Trip current： lowest current at which the thermistor will trip by default at 25Ԩ ambient temperature
V
max
Maximum voltage the thermistor can withstand without damage at rated current (I
max
)
I
max
Maximum fault current device can withstand without damage at rated voltage (V
max
)
P
d
The power dissipating from the thermistor when it is in tripped state at 25Ԩ ambient temperature.
R
min/max
Minimum/Maximum resistance of the thermistor before an initial trip event
R1max Maximum resistance of the thermistor 1 hour after the initial trip event, measured at 25Ԩ ambient temperature
*
CAUTION: Operation beyond the specified rating may result in damage and possible arcing. The thermistors are intended for protection against
occasional overcurrent or over-temperature faults and should not be used when repeated fault conditions are anticipated.
Applications
Almost all appliances with low voltage
power supply, up to DC 60V, and where
a load has to be protected, including:
Security and fire alarm systems
Analog and digit line cards
Modems and DSL routers
Ordering Information
Series No. Operating Current Packaging Quantity Purchase Order No.
BJK250
BETTER ELECTRONICS
TECHNOLOGY CO., LTD
东莞市贝特电子科技股份有限公司
www.betterfuse.com
China sales:
Jacky Huang
sls01@betterfuse.com
+86 769-83238731 ext.859
Japan sales:
Li Ling
lynn.li@betterfuse.com
+86-769-2307 8207
BJK250 Series PPTC Fuse
Europe sales:
Helge Glueck
helge@betterfuse.com
+49-341-946 98772
South Korea sales:
Jenny Li
sm12@betterfuse.com
+86 769-2307 8212
Product Dimensions (in mm) and Packing Information
Environmental Specifications
Test Conditions Resistance Change
Passive aging +85℃, 1000hrs ±8%, typical
Humidity aging +85℃，85% R.H., 1000hrs ±8%, typical
Thermal shock -55℃ to +125℃, 10 times ±12%, typical
Resistance to solvent MIL-STD-202, Method 215 No change
Vibration MIL-STD-202, Method 201 No change
Storage conditions: 5Ԩ~40Ԩ
Model Fig. Quantity A(max) B(max) C(max) D(type)
BJK250-020U 1 1000 7.4 12.7 4.6 5.1
BJK250-030U 1 1000 7.4 12.7 4.6 5.1
BJK250-040U 1 1000 7.4 12.7 4.6 5.1
BJK250-060U 1 1000 7.4 12.7 4.6 5.1
BJK250-080U 1 1000 7.4 12.7 4.6 5.1
BJK250-090U 1 1000 7.4 12.7 4.6 5.1
BJK250-100U 1 1000 7.8 12 4.6 5.1
BJK250-110U 3 1000 7.0 12.6 4.6 5.1
BJK250-120 4 1000 5.5 5.5 2.2 ---
BJK250-120U 3 1000 7.0 12.6 4.6 5.1
BJK250-145U 3 1000 7.0 12.6 4.6 5.1
BJK250-180T 1 1000 10.2 14.5 4.2 5.1
BJK250-180U 3 1000 11.5 14.5 4.6 5.1
BJK250-200U 5 500 12.0 17.0 4.6 5.1
BJK250-400U 5 500 12.0 17.0 4.6 5.1
BJK250-600U 5 500 16.0 18.0 4.6 5.1
BJK250-800U 5 200 20.0 22.5 4.6 5.1
BJK250-1000U 5 200 20.0 22.0 4.6 5.1
BJK250-1200U 5 200 22.0 28.0 4.6 5.1
BJK250-1500U 5 200 25.0 30.0 4.6 5.1
BJK250-2000U 5 200 26.0 32.0 4.6 10.2
NOTE: The package quantity refers to one bag (unit: pcs).
Physical Characteristics
Model Lead Material
BJK250-020U ~ BJK250-600U Thin plated copper, 22AWG Φ0.60mm
BJK250-800U ~ BJK250-2000U Thin plated copper, 22AWG Φ0.80mm