UBF SR Series - 125°C Activation
Details
UBF SR Series - 125°C Activation
 
Electrical Characteristics
 
Part No Figure lhold (A) Itrip
(A)
Vmax
(V)
Imax
(A)
Pd typ
(W)
Max.
(A)
Time-to-trip
 (s)
R min
(Ω)
R Max
(Ω)
R1 Max
 (Ω)
UBF SR120 1 1.20 2.7 15 100 1.2 6.0 5.0 0.085 0.160 0.220
UBF SR175 1 1.75 3.8 15 100 1.5 8.75 5.0 0.050 0.090 0.120
UBF SR200 1 2.00 4.4 30 100 1.9 10.0 4.0 0.030 0.060 0.100
UBF SR350 1 3.50 6.3 30 100 2.5 20.0 3.0 0.017 0.031 0.050
UBF SR420 1 4.20 7.6 30 100 2.9 20.0 6.0 0.012 0.024 0.040
 
 
Comment
 
Ihold Hold current is the maximum current that UB Fuse can pass through without interruption at 20°C unless otherwise specified.
Itrip Trip current is the minimum current that will switch the device from low resistance state to high resistance state at 20°C unless specified.
Vmax The maximum voltage device can withstand without damage at rated current.
Imax The maximum current device can withstand without damage at rated voltage.
Pd The power dissipated from device when in the tripped state at 20°C unless otherwise specified.
R min The minimum resistance of device as received from the factory at 20°C unless otherwise specified.
R max The maximum resistance of device as received from the factory at 20°C unless otherwise specified.
R1max The maximum resistance of device when measured one hour post trip at 20°C unless otherwise specified.
Max.
Time-to-trip
The maximum time for device to trip at specified current ratings at 20°C unless otherwise specified.
 
 
◆ Environmental Characteristics
 
Test Test Conditions Resistance Change
Passive Aging +70°C, 1000 hours  ±10% typical resistance change
Humidity Aging +85°C, 85% R.H., 7 days  ±10% typical resistance change
Thermal Shock +85°C to -40°C, 10 times
MIL-STD-202, Method 107G
 ±+5% typical resistance change
Vibration MIL-STD-883C, Condition A No change
 
 
Dimensions
 
  A B C D E F
Part No Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. Min. Max.
UBF SR120 19.9 22.1 0.6 1.0 4.9 5.2 5.5 7.5 5.5 7.5 3.9 4.1
UBF SR120S 19.9 22.1 0.6 1.0 4.9 5.2 5.5 7.5 5.5 7.5 3.9 4.1
UBF SR175 20.9 23.1 0.6 1.0 4.9 5.2 4.1 5.5 4.1 5.5 3.9 4.1
UBF SR175S 20.9 23.1 0.6 1.0 4.9 5.2 4.1 5.5 4.1 5.5 3.9 4.1
UBF SR175SS 20.9 23.1 0.6 1.0 4.9 5.2 4.1 5.5 4.1 5.5 3.9 4.1
UBF SR175N 26.0 28.0 0.6 1.0 3.55 3.80 7.1 8.5 7.1 8.5 2.4 2.6
UBF SR200 21.3 23.4 0.5 1.1 10.2 11.0 5.0 7.6 5.0 7.6 4.8 5.4
UBF SR200N 30.0 32.0 0.6 1.0 3.55 3.80 5.5 7.5 5.5 7.5 2.4 2.6
UBF SR350 28.4 31.8 0.5 1.1 13.0 13.5 6.3 8.9 6.3 8.9 6.0 6.6
UBF SR420 30.6 32.4 0.5 1.1 12.9 13.6 5.0 7.5 5.0 7.5 6.0 6.7
 
 
●NOTE:

All drawings are not in scale and layout may vary.
All parts dimension is in millimeter unless otherwise specified.
Terminal material is quarter hard Nickel with nominal thickness 0.125mm.
Tape material is Polyester.
All terminal’s slit dimension is 0.5x4.0mm.
Rounded corner terminals are available upon customer request.
All part numbers are available without wrapping upon customer request.                     
 

●Packaging: 1000 pcs per bag (UBFSR120 to UBFSR175N,200N)
            500 pcs per bag (UBFSR200 to UBFSR420)
 
●Agency Approval:
 
UL File Number E 119550
TUV File Number Pending


 
 
◆Typical Thermal Derating Chart - Ihold (A)
 
Part No -40 -20 0 25 40 60 85
UBF SR120 1.9 1.7 1.5 1.2 1.0 0.8 0.4
UBF SR120S 1.9 1.7 1.5 1.2 1.0 0.8 0.4
UBF SR175 2.5 2.2 2.0 1.75 1.4 1.2 0.8
UBF SR175S 2.5 2.2 2.0 1.75 1.4 1.2 0.8
UBF SR175SS 2.5 2.2 2.0 1.75 1.4 1.2 0.8
UBF SR175N 2.5 2.2 2.0 1.75 1.4 1.2 0.8
UBF SR200 3.1 2.8 2.5 2.0 1.7 1.4 0.9
UBF SR200N 3.1 2.8 2.5 2.0 1.7 1.4 0.9
UBF SR350 5.3 4.8 4.3 3.5 3.0 2.5 1.7
UBF SR420 6.3 5.7 5.1 4.2 3.6 3.0 2.1
 
 




 
◆Typical Time To Trip Curve at 20°C