*
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
To Trip
Tripped
Power
Dissipation
Ihold
Itrip
Resistance
Model
Amperes
at 23
°
C
Ohms
at 23
°
C
Amperes
at 23
°
C
Seconds
at 23
°
C
Watts
at 23
°
C
V max.
Volts
I max.
Amps
Hold
Trip
RMin.
0.3
0.045
0.022
0.011
0.0094
0.0041
R1Max.
(Post Trip)
0.8
0.110
0.054
0.026
0.022
0.010
Max.
Typ.
MF-RHT070
MF-RHT200
MF-RHT450
MF-RHT650
MF-RHT750
MF-RHT1300
16
16
16
16
16
16
40
100
100
100
100
100
0.7
2.0
4.5
6.5
7.5
13.0
1.4
3.8
7.8
12.0
13.1
24.0
3.5
12.5
22.5
32.5
37.5
60.0
4.0
3.0
3.0
5.5
7.0
13.0
1.4
1.4
3.6
4.3
4.5
6.9
Electrical Characteristics
RH750
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
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 Conditions
Accept/Reject Criteria
Test Procedures And Requirements For Model MF-RHT Series
Ambient Operating Temperature
23
°
C
40
°
C
0.7
0.62
2.00
1.77
4.5
4.0
6.5
5.7
7.5
6.6
13.0
11.4
Model
-40
°
C
0.95
2.71
6.1
8.8
10.2
17.7
-20
°
C
0.87
2.49
5.6
8.1
9.4
16.3
0
°
C
0.79
2.26
5.1
7.4
8.6
14.8
50
°
C
0.56
1.60
3.6
5.3
6.1
10.5
60
°
C
0.51
1.46
3.3
4.8
5.6
9.6
70
°
C
0.47
1.34
3.0
4.3
5.0
8.6
85
°
C
0.39
1.11
2.5
3.6
4.1
7.2
125
°
C
0.17
0.49
1.1
1.6
1.9
3.3
MF-RHT070
MF-RHT200
MF-RHT450
MF-RHT650
MF-RHT750
MF-RHT1300
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
*RHSCOMPIAN