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PDF MF-RX250 Data sheet ( Hoja de datos )
| Número de pieza | MF-RX250 | |
| Descripción | (MF-RX Series) PTC Resettable Fuses | |
| Fabricantes | Bourns | |
| Logotipo |  |
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Features
The MF-RX Series is currently
■ Radial Leaded Devices
available, although not recommended
for new designs. The higher voltage
■ Cured, flame retardant epoxy polymer
rated MF-RX/72 Series is preferred.
R01X8101T0
insulating material meets UL 94V-0
requirements
■ Agency recognition:
■ RoHS compliant*
MF-RX Series - PTC Resettable Fuses
Electrical Characteristics
Model
V max.
Volts
I max.
Amps
MF-RX110
MF-RX135
MF-RX160
MF-RX185
MF-RX250
MF-RX300
MF-RX375
60
60
60
60
60
60
60
40
40
40
40
40
40
40
Ihold
Itrip
Amperes
at 23 °C
Hold
1.10
1.35
1.60
1.85
2.50
3.00
3.75
Trip
2.20
2.70
3.20
3.70
5.00
6.00
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
Amperes Seconds
at 23 °C at 23 °C
5.5
6.75
8.0
9.25
12.5
15.0
18.75
8.2
9.6
11.4
12.6
15.6
19.8
24.0
Tripped
Power
Dissipation
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 ºC
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 ºC
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 ºC
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 ºC
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 ºC
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 ºC
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 ºC
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 ºC
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 ºC
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 and RoHS Recast 2011/65/EU June 8, 2011.
Specifications are subject to change without notice.
The device characteristics and parameters in this data sheet can and do vary in different applications and actual device performance may vary over time.
Users should verify actual device performance in their specific applications.
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