MF-RX Datasheet, PDF (1/4 Pages) Bourns Electronic Solutions – PTC Resettable Fuses

*RoHS ^COMPLIANT
R01X8101T0
Features
■ Radial Leaded Devices
■ Cured, flame retardant epoxy polymer
insulating material meets
UL 94V-0 requirements
■ Agency recognition:
T V Rheinland
■ RoHS compliant*
The MF-RX Series is currently
available, although not recommended
for new designs. The higher voltage
rated MF-RX/72 Series is preferred.
MF-RX Series - PTC Resettable Fuses
Electrical Characteristics
Model
MF-RX110
MF-RX135
MF-RX160
MF-RX185
MF-RX250
MF-RX300
MF-RX375
V max.
Volts
I max.
Amps
60
40
60
40
60
40
60
40
60
40
60
40
60
40
Ihold
Itrip
Amperes
at 23 °C
Hold
Trip
1.10
2.20
1.35
2.70
1.60
3.20
1.85
3.70
2.50
5.00
3.00
6.00
3.75
7.50
Initial
Resistance
Ohms
at 23 °C
Min.
Max.
0.15
0.25
0.12
0.19
0.09
0.14
0.08
0.12
0.05
0.08
0.04
0.06
0.03
0.05
1 Hour (R1)
Post-Trip
Resistance
Ohms
at 23 °C
Max.
0.38
0.30
0.22
0.19
0.13
0.10
0.08
Max. Time
To Trip
Tripped
Power
Dissipation
Amperes Seconds
at 23 °C at 23 °C
5.5
8.2
6.75
9.6
8.0
11.4
9.25
12.6
12.5
15.6
15.0
19.8
18.75
24.0
Watts
at 23 °C
Typ.
1.50
1.70
1.90
2.10
2.50
2.80
3.20
Environmental Characteristics
Operating/Storage Temperature ........................-40 °C to +85 °C
Maximum Device Surface Temperature
in Tripped State ................................................125 °C
Passive Aging......................................................+85 °C, 1000 hours ....................................±5 % typical resistance change
Humidity Aging....................................................+85 °C, 85 % R.H. 1000 hours....................±5 % typical resistance change
Thermal Shock ....................................................-40 °C to +85 °C,10 times ..........................±10 % typical resistance change
Solvent Resistance ............................................MIL-STD-202, Method 215 ........................No change
Vibration ..............................................................MIL-STD-883C, Method 2007.1, ................No change
Condition A
Test Procedures And Requirements For Model MF-RX Series
Test
Test Conditions
Accept/Reject Criteria
Visual/Mech. ......................................................Verify dimensions and materials..................Per MF physical description
Resistance ..........................................................In still air @ 23 °C ........................................Rmin ≤ R ≤ Rmax
Time to Trip ........................................................5 times Ihold, Vmax, 23 °C..........................T ≤ max. time to trip (seconds)
Hold Current ......................................................30 min. at Ihold............................................No trip
Trip Cycle Life ....................................................Vmax, Imax, 100 cycles ..............................No arcing or burning
Trip Endurance....................................................Vmax, 48 hours ..........................................No arcing or burning
UL File Number ..................................................E 174545S
CSA File Number ................................................CA 110338
TÜV File Number ................................................R2057213
Thermal Derating Chart - Ihold _/ Itrip (Amps)
Model
MF-RX110
MF-RX135
MF-RX160
MF-RX185
MF-RX250
MF-RX300
MF-RX375
-40 °C
1.71 / 3.42
2.09 / 4.18
2.48 / 4.96
2.87 / 5.74
3.88 / 7.76
4.65 / 9.30
5.81 / 11.6
-20 °C
1.50 / 3.00
1.84 / 3.68
2.18 / 4.36
2.52 / 5.04
3.40 / 6.80
4.08 / 8.16
5.10 / 10.2
0 °C
1.31 / 2.62
1.61 / 3.22
1.90 / 3.80
2.20 / 4.40
2.98 / 5.96
3.57 / 7.14
4.46 / 8.92
Ambient Operating Temperature
23 °C
1.10 / 2.20
1.35 / 2.70
1.60 / 3.20
1.85 / 3.70
2.50 / 5.00
3.00 / 6.00
3.75 / 7.50
40 °C
0.89 / 1.78
1.09 / 2.18
1.30 / 2.60
1.50 / 3.00
2.03 / 4.06
2.43 / 4.86
3.04 / 6.08
50 °C
0.79 / 1.58
0.97 / 1.94
1.15 / 2.30
1.33 / 2.66
1.80 / 3.60
2.16 / 4.32
2.70 / 5.40
60 °C
0.69 / 1.38
0.85 / 1.70
1.01 / 2.02
1.17 / 2.34
1.58 / 3.16
1.89 / 3.78
2.36 / 4.72
70 °C
0.59 / 1.18
0.73 / 1.46
0.86 / 1.72
1.00 / 2.00
1.35 / 2.70
1.62 / 3.24
2.03 / 4.06
85 °C
0.44 / 0.88
0.54 / 1.08
0.64 / 1.28
0.74 / 1.48
1.00 / 2.00
1.20 / 2.40
1.50 / 3.00
*RoHS Directive 2002/95/EC Jan 27 2003 including Annex.
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.