MF-RX040/72-0 Bourns Inc., MF-RX040/72-0 Datasheet - Page 3

• Manufacturer Part Number: MF-RX040/72-0
• Description: FUSE PTC RESETTABLE 0.4A HOLD
• Manufacturer: Bourns Inc.
• Series: MF-RXr

Specifications of MF-RX040/72-0

• R Min/max: 0.520 ~ 0.860 Ohm
• Voltage - Max: 72V
• Time To Trip: 3.9s
• Current - Hold (ih) (max): 400mA
• Current - Trip (it): 800mA
• Current - Max: 40A
• Package / Case: Radial
• Tripping Current: 0.8A
• Initial Resistance Max: 0.86ohm
• Svhc: No SVHC (15-Dec-2010)
• Approval Category: UL Recognised
• Body Diameter: 7.4mm
• Case Material: Epoxy Polymer
• Current Max: 40A
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

The Time to Trip curves represent typical performance of a device in a simulated application environment. Actual performance in specific customer
applications may differ from these values due to the influence of other variables.
Thermal Derating Chart - I hold (Amps)
MF-RX020/72
MF-RX025/72
MF-RX030/72
MF-RX040/72
MF-RX050/72
MF-RX065/72
MF-RX075/72
MF-RX090/72
MF-RX110/72
MF-RX135/72
MF-RX160/72
MF-RX185/72
MF-RX250/72
MF-RX300/72
MF-RX375/72
Typical Time to Trip at 23 °C
Model
MF-RX/72 Series -
0.001
0.01
100
0.1
10
1
0.1
-40
0.31
0.39
0.47
0.62
0.78
1.01
1.16
1.40
1.71
2.09
2.48
2.87
3.88
4.65
5.81
Fault Current (Amps)
°
C
1
-20
0.27
0.34
0.41
0.54
0.68
0.88
1.02
1.22
1.50
1.84
2.18
2.52
3.40
4.08
5.10
PTC Resettable Fuses
°
C
10
0
0.24
0.30
0.36
0.48
0.60
0.77
0.89
1.07
1.31
1.61
1.90
2.20
2.98
3.57
4.46
°
C
23
Ambient Operating Temperature
0.20
0.25
0.30
0.40
0.50
0.65
0.75
0.90
1.10
1.35
1.60
1.85
2.50
3.00
3.75
°
100
C
40
Customers should verify actual device performance in their specific applications.
0.16
0.20
0.24
0.32
0.41
0.53
0.61
0.73
0.89
1.09
1.30
1.50
2.03
2.43
3.04
°
C
0.001
1000
0.01
50
100
0.1
0.14
0.18
0.22
0.29
0.36
0.47
0.54
0.65
0.79
0.97
1.15
1.33
1.80
2.16
2.70
10
1
°
1
C
Specifications are subject to change without notice.
Fault Current (Amps)
60
0.13
0.16
0.19
0.25
0.32
0.41
0.47
0.57
0.69
0.85
1.01
1.17
1.58
1.89
2.36
°
C
10
MF-RX/72 SERIES, REV. E, 02/08
70
0.11
0.14
0.16
0.22
0.27
0.35
0.41
0.49
0.59
0.73
0.86
1.00
1.35
1.62
2.03
°
C
85
0.08
0.10
0.12
0.16
0.20
0.26
0.30
0.36
0.44
0.54
0.64
0.74
1.00
1.20
1.50
100
°
C