FUSE PTC RESET 2.50A HOLD

MF-RX250/72-0

Manufacturer Part NumberMF-RX250/72-0
DescriptionFUSE PTC RESET 2.50A HOLD
ManufacturerBourns Inc.
SeriesMF-RX
TypePTC Resettable Fuses
MF-RX250/72-0 datasheets
 


Specifications of MF-RX250/72-0

R Min/max0.050 ~ 0.080 OhmVoltage - Max72V
Time To Trip15.6sCurrent - Hold (ih) (max)2.5A
Current - Trip (it)5ACurrent - Max40A
Package / CaseRadialHold Current2.5 Amps
Trip Current5 AmpsCurrent Rating (max)40 Amps
Resistance0.08 OhmsMaximum Voltage72 VoltsDC
Termination StyleRadialMounting StyleThrough Hole
Dimensions17.84 mm L x 3.1 mm W x 23.84 mm HLead Spacing10.2 mm
Operating Temperature Range- 40 C to + 85 CInitial Resistance (min)50mOhm
Initial Resistance (max)80mOhmVoltage Rating Max72V
Trip Time (max)15.6@12.5AsPower Dissipation (typ)2.5W
Post Trip Resistance (max)130mOhmWire FormStraight
Agency ApprovalsULOperating Temperature Min Deg. C-40C
Operating Temperature Max Deg. C85CBrand/seriesMF-RX/72 Series
Current, Rating2.5 AMounting TypePCB
Primary TypeResettableResistance, Dc0.05 Ohms
TerminationRadialVoltage, Rating72 VDC
Holding Current2.5ATripping Current5A
Initial Resistance Max0.08ohmOperating Voltage72V
Ptc Fuse CaseRadial LeadedExternal Depth3.1mm
Initial Resistance Min0.05ohmRohs CompliantYes
Lead Free Status / RoHS StatusLead free / RoHS CompliantOther namesMF-RX250/72
MF-RX250/72
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Electrical Characteristics
V max.
I max.
Model
Volts
Amps
MF-RX020/72
72
40
MF-RX025/72
72
40
MF-RX030/72
72
40
MF-RX040/72
72
40
MF-RX050/72
72
40
MF-RX065/72
72
40
MF-RX075/72
72
40
MF-RX090/72
72
40
MF-RX110/72
72
40
MF-RX135/72
72
40
MF-RX160/72
72
40
MF-RX185/72
72
40
MF-RX250/72
72
40
MF-RX300/72
72
40
MF-RX375/72
72
40
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 ..................................................... +85 °C to -55 °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
Test Procedures And Requirements For Model MF-RX/72 Series
Test
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 174545
Features
72 V rated
Radial leaded devices
Cured, fl ame retardant epoxy polymer
insulating material meets UL 94V-0
requirements
RoHS compliant*
Agency recognition:
MF-RX/72 Series - PTC Resettable Fuses
1 Hour (R 1 )
Initial
I hold
I trip
Resistance
Resistance
Amperes
Ohms
at 23 °C
at 23 °C
Hold
Trip
Min.
Max.
0.20
0.40
1.50
2.84
0.25
0.50
1.00
1.95
0.30
0.60
0.76
1.36
0.40
0.80
0.52
0.86
0.50
1.00
0.41
0.77
0.65
1.30
0.27
0.48
0.75
1.50
0.18
0.40
0.90
1.80
0.14
0.31
1.10
2.20
0.15
0.25
1.35
2.70
0.12
0.19
1.60
3.20
0.09
0.14
1.85
3.70
0.08
0.12
2.50
5.00
0.05
0.08
3.00
6.00
0.04
0.06
3.75
7.50
0.03
0.05
Condition A
Test Conditions
Customers should verify actual device performance in their specifi c applications.
Applications
Almost anywhere there is a low voltage power
supply, up to 72 V and a load to be protected,
including:
Security and fi re alarm systems
Loudspeakers
Power transformers
Max. Time
Post-Trip
To Trip
Dissipation
Ohms
Amperes
Seconds
at 23 °C
at 23 °C
at 23 °C
at 23 °C
Max.
4.40
1.0
2.2
3.00
1.25
2.5
2.10
1.5
3.0
1.29
2.0
3.9
1.17
2.5
4.0
0.72
3.25
5.3
0.60
3.75
6.3
0.47
4.5
7.2
0.38
5.5
8.2
0.30
6.75
9.6
0.22
8.0
11.4
0.19
9.25
12.6
0.13
12.5
15.6
0.10
15.0
19.8
0.08
18.75
24.0
Accept/Reject Criteria
*RoHS Directive 2002/95/EC Jan 27 2003 including Annex.
Specifi cations are subject to change without notice.
Tripped
Power
Watts
Typ.
0.40
0.45
0.50
0.55
0.75
0.90
0.90
1.00
1.50
1.70
1.90
2.10
2.50
2.80
3.20

MF-RX250/72-0 Summary of contents

  • Page 1

    ... Vibration ............................................................... MIL-STD-883C, Method 2007.1, .......................... No change Test Procedures And Requirements For Model MF-RX/72 Series Test 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 ...

  • Page 2

    ... Packaging options: BULK: 500 pcs. per bag. TAPE & REEL: MF-RX020/72-2 ~ MF-RX090/72-2 = 3000 pcs. per reel; MF-RX110/72-2 ~ MF-RX160/72-2 = 1500 pcs. per reel; MF-RX185/72-2 - MF-RX375/72-2 = 1000 pcs. per reel. AMMO-PACK: MF-RX020/72-AP ~ MF-RX090/72-AP = 2000 pcs. per pack; MF-RX110/72-AP ~ MF-RX160/72-AP = 1000 pcs. per pack; ...

  • Page 3

    ... MF-RX/72 Series - PTC Resettable Fuses Typical Time to Trip at 23 ˚C 100 10 1 0.1 0.01 0.001 0.1 1 Fault Current (Amps) The Time to Trip curves represent typical performance of a device in a simulated application environment. Actual performance in specifi c customer applications may differ from these values due to the infl uence of other variables. ...

  • Page 4

    ... MF-R/72 & MF-RX/72 Series Tape and Reel Specifi cations Devices taped using EIA468–B/IEC60286-2 standards. See table below and Figures 1 and 2 for details. Dimension Description Carrier tape width Hold down tape width Hold down tape Top distance between tape edges ...

  • Page 5

    ... MF-R/72 & MF-RX/72 Series Tape and Reel Specifi cations Dimension Description Reel width Reel diameter Space between fl anges less device Arbor hole diameter Core diameter Box Consecutive missing places Empty places per reel Taped Component Dimensions - Figure Reel Dimensions - Figure 2 ...