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MF-RHT450 Datasheet(PDF) 1 Page - Bourns Electronic Solutions

Part # MF-RHT450
Description  PTC Resettable Fuses
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Manufacturer  BOURNS [Bourns Electronic Solutions]
Direct Link  http://www.bourns.com
Logo BOURNS - Bourns Electronic Solutions

MF-RHT450 Datasheet(HTML) 1 Page - Bourns Electronic Solutions

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*
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.
MF-RHT Series - PTC Resettable Fuses
Max. Time
Tripped
Ihold
Itrip
To Trip
Power
Resistance
Dissipation
Model
Amperes
Ohms
Amperes
Seconds
Watts
V max.
I max.
at 23
°C
at 23
°C
at 23
°C
at 23
°C
at 23
°C
Volts
Amps
Hold
Trip
RMin.
R1Max.
Max.
Typ.
(Post Trip)
MF-RHT070
16
40
0.7
1.4
0.3
0.8
3.5
4.0
1.4
MF-RHT200
16
100
2.0
3.8
0.045
0.110
12.5
3.0
1.4
MF-RHT450
16
100
4.5
7.8
0.022
0.054
22.5
3.0
3.6
MF-RHT650
16
100
6.5
12.0
0.011
0.026
32.5
5.5
4.3
MF-RHT750
16
100
7.5
13.1
0.0094
0.022
37.5
7.0
4.5
MF-RHT1300
16
100
13.0
24.0
0.0041
0.010
60.0
13.0
6.9
Electrical Characteristics
RH75
0
4180S
Features
Operating temperature range up to 125 °C
Low thermal derating factor
Higher hold currents at elevated
temperature
Choice of operating currents
RoHS compliant* and Pb free
Applications
Protection of automotive circuitry
including engine control modules
Overcurrent surge protection of electronic
equipment required to operate at high
operating temperature ranges
Resettable fault protection of general
electronic equipment
Thermal Derating Chart - Ihold (Amps)
Operating Temperature ..............................................................-40 °C to +125 °C
Storage Temperature ................................................................-40 °C to +85 °C
Passive Aging ............................................................................+85 °C, 1000 hours ..........................................................±15 % typical resistance change
Humidity Aging ..........................................................................+85 °C, 85 % R.H. 1000 hours ........................................±15 % typical resistance change
Thermal Shock ..........................................................................MIL-STD-202, Method 107, ............................................±10 % typical resistance change
+125 °C to -40 °C,10 cycles
Vibration ....................................................................................MIL-STD-883C, Method 2007.1, Condition A..................No change
Environmental Characteristics
Test
Test Conditions
Accept/Reject Criteria
Visual/Mech. ......................................Verify dimensions and materials ............................................Per MF physical description
Resistance..........................................In still air @ 23 °C ..................................................................Rmin ≤ R ≤ R1max
Time to Trip ........................................At specified current, 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
Solderability ......................................MIL-STD-202, Method 208....................................................95 % min. coverage
Test Procedures And Requirements For Model MF-RHT Series
Ambient Operating Temperature
Model
-40
°C
-20
°C0 °C
23
°C
40
°C
50
°C
60
°C
70
°C
85
°C
125
°C
MF-RHT070
0.95
0.87
0.79
0.7
0.62
0.56
0.51
0.47
0.39
0.17
MF-RHT200
2.71
2.49
2.26
2.00
1.77
1.60
1.46
1.34
1.11
0.49
MF-RHT450
6.1
5.6
5.1
4.5
4.0
3.6
3.3
3.0
2.5
1.1
MF-RHT650
8.8
8.1
7.4
6.5
5.7
5.3
4.8
4.3
3.6
1.6
MF-RHT750
10.2
9.4
8.6
7.5
6.6
6.1
5.6
5.0
4.1
1.9
MF-RHT1300
17.7
16.3
14.8
13.0
11.4
10.5
9.6
8.6
7.2
3.3
Circuit Protection Division
Asia-Pacific: Tel: +886-2 2562-4117 • Fax: +886-2 2562-4116
Europe: Tel: +41-41 768 5555 • Fax: +41-41 768 5510
The Americas: Tel: +1-951 781-5500 • Fax: +1-951 781-5700
www.bourns.com


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