FUSE PTC RESET

MF-R250-2

Manufacturer Part NumberMF-R250-2
DescriptionFUSE PTC RESET
ManufacturerBourns Inc.
SeriesMF-R
TypePTC Resettable Fuses
MF-R250-2 datasheet
 


Specifications of MF-R250-2

Voltage - Max30VCurrent - Max40A
Current - Hold (ih) (max)2.5ACurrent - Trip (it)5A
R Min/max0.025 ~ 0.048 OhmTime To Trip10.3s
Package / CaseRadialHold Current2.5 Amps
Trip Current5 AmpsCurrent Rating (max)40 Amps
Resistance0.048 OhmsMaximum Voltage30 VoltsDC
Termination StyleRadialMounting StyleThrough Hole
Current Rating40 AmpsDimensions12 mm L x 3 mm W x 18.3 mm H x 12 mm D
Lead Spacing5.1 mmOperating Temperature Range- 40 C to + 85 C
Initial Resistance (min)25mOhmInitial Resistance (max)48mOhm
Voltage Rating Max30VTrip Time (max)10.3@12.5As
Power Dissipation (typ)1.2WPost Trip Resistance (max)70mOhm
Wire FormStraightAgency ApprovalsCSA/TUV/UL
Operating Temperature Min Deg. C-40COperating Temperature Max Deg. C85C
Lead Free Status / RoHS StatusLead free / RoHS Compliant  
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R
1 1 0
0 1 8
0 T
Electrical Characteristics
I max.
V max.
Model
Volts
Amps
MF-R005**
60
40
MF-R010
60
40
MF-R017
60
40
MF-R020
60
40
MF-R025
60
40
MF-R030
60
40
MF-R040
60
40
MF-R050
60
40
MF-R065
60
40
MF-R075
60
40
MF-R090
60
40
MF-R090-0-9
30
40
MF-R110
30
40
MF-R135
30
40
MF-R160
30
40
MF-R185
30
40
MF-R250
30
40
MF-R250-0-10
30
40
MF-R300
30
40
MF-R400
30
40
MF-R500
30
40
MF-R600
30
40
MF-R700
30
40
MF-R800
30
40
MF-R900
30
40
MF-R1100
16
100
**CSA approval pending.
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
Test Procedures And Requirements For Model MF-R 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
CSA File Number ............................................. CA 110338
TÜV File Number ............................................. R2057213
*RoHS Directive 2002/95/EC Jan 27 2003 including Annex.
Specifi cations are subject to change without notice.
Customers should verify actual device performance in their specifi c applications.
Features
Radial Leaded Devices
Cured, fl ame retardant epoxy polymer
insulating material meets UL 94V-0
requirements
RoHS compliant*
Agency recognition:
MF-R Series - PTC Resettable Fuses
Initial
Ihold
Itrip
Resistance
Amperes
Ohms
at 23 °C
at 23 °C
Hold
Trip
Min.
Max.
0.05
0.10
7.3
11.1
0.10
0.20
2.50
4.50
0.17
0.34
2.00
3.20
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
0.90
1.80
0.07
0.12
1.10
2.20
0.10
0.18
1.35
2.70
0.065
0.115
1.60
3.20
0.055
0.105
1.85
3.70
0.040
0.07
2.50
5.00
0.025
0.048
2.50
5.00
0.025
0.048
3.00
6.00
0.020
0.05
4.00
8.00
0.010
0.03
5.00
10.00
0.010
0.03
6.00
12.00
0.005
0.02
7.00
14.00
0.005
0.02
8.00
16.00
0.005
0.02
9.00
18.00
0.005
0.01
11.00
22.00
0.003
0.01
Condition A
Test Conditions
Applications
Almost anywhere there is a low voltage power
supply and a load to be protected, including:
Computers & peripherals
General electronics
Automotive applications
1 Hour (R 1 )
Tripped
Max. Time
Post-Trip
Power
to Trip
Resistance
Dissipation
Ohms
Amperes
Seconds
Watts
at 23 °C
at 23 °C
at 23 °C
at 23 °C
Max.
22.0
0.5
5.0
7.50
0.5
4.0
8.00
0.85
3.0
4.40
1.0
2.2
3.00
1.25
2.5
2.10
1.5
3.0
1.29
2.0
3.8
1.17
2.5
4.0
0.72
3.25
5.3
0.60
3.75
6.3
0.47
4.5
7.2
0.22
4.5
5.9
0.27
5.5
6.6
0.17
6.75
7.3
0.15
8.0
8.0
0.11
9.25
8.7
0.07
12.5
10.3
0.07
12.5
10.3
0.08
15.0
10.8
0.05
20.0
12.7
0.05
25.0
14.5
0.04
30.0
16.0
0.03
35.0
17.5
0.03
40.0
18.8
0.02
45.0
***20.0
0.014
40.0
20.0
***Tested at 40 amps
Accept/Reject Criteria
Typ.
0.22
0.38
0.48
0.40
0.45
0.50
0.55
0.75
0.90
0.90
1.00
0.60
0.70
0.80
0.90
1.00
1.20
1.20
2.00
2.50
3.00
3.50
3.80
4.00
4.20
4.50

MF-R250-2 Summary of contents

  • Page 1

    ... Vibration .......................................................... MIL-STD-883C, Method 2007.1, ..................... No change Test Procedures And Requirements For Model MF-R 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: All models = 500 pcs. per bag. TAPE & REEL: MF-R005-MF-R160 - 12.7 mm device pitch = 3000 pcs. per reel; MF-R185-MF-R400 - 25.4mm device pitch = 1500 pcs. per reel; MF-R250-0-10 = 1500 pcs. per reel. AMMO-PACK: MF-R005-MF-R160 - 12.7 mm device pitch = 2000 pcs. per reel; ...

  • Page 3

    ... MF-R Series - PTC Resettable Fuses Product Dimensions (see previous page for dimensions) Style 1 Style NOTE: Kinked lead option is available for board standoff. Contact factory for details. Thermal Derating Chart - I hold / I trip (Amps) Model -40 ºC -20 ºC MF-R005 0.08 / 0.16 0.07 / 0.14 MF-R010 ...

  • Page 4

    ... Fault Current (Amps) 10 100 10 100 Customers should verify actual device performance in their specifi c applications. How to Order 110 - Multifuse ® Product Designator Series R = Radial Leaded Component Hold Current, I hold 005-1100 (0.05 Amps - 11.0 Amps) Packaging Options - __ = Bulk Packaging without part number suffi ...

  • Page 5

    ... MF-R, MF-R/90, MF-R/600, MF-RX, MF-RX/72 & MF-RX/250 Series Tape and Reel Specifi cations Devices taped using EIA468–B/IEC286-2 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 6

    ... MF-R, MF-R/90, MF-R/600, MF-RX, MF-RX/72 & MF-RX/250 Series Tape and Reel Specifi cations Dimension Description Lead spacing: MF-R, MF-R/90, MF-R/600, MF-RX, MF-RX/72 Lead spacing: MF-RX/250 Reel width Reel diameter Space between fl anges less device Arbor hole diameter Core diameter: MF-R, MF-RX, MF-R/90 ...