MF-RX300/72-0 Bourns Inc., MF-RX300/72-0 Datasheet - Page 3

• Manufacturer Part Number: MF-RX300/72-0
• Description: FUSE PTC RESET 3.00A HOLD
• Manufacturer: Bourns Inc.
• Series: MF-RXr

Specifications of MF-RX300/72-0

• R Min/max: 0.040 ~ 0.060 Ohm
• Voltage - Max: 72V
• Time To Trip: 19.8s
• Current - Hold (ih) (max): 3A
• Current - Trip (it): 6A
• Current - Max: 40A
• Package / Case: Radial
• Holding Current: 3A
• Tripping Current: 6A
• Initial Resistance Max: 0.06ohm
• Operating Voltage: 72V
• Ptc Fuse Case: Radial Lead
• Initial Resistance Min: 0.04ohm
• Lead Spacing: 10.2mm
• Brand/series: MF-RX/72 Series
• Current, Rating: 3 A
• Dimensions: 0.814x0.122x1.05 "
• Mounting Type: PCB
• Primary Type: Resettable
• Resistance, Dc: 0.04 Ohms
• Termination: Radial
• Voltage, Rating: 72 VDC
• External Depth: 3.1mm
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: MF-RX300/72; MF-RX300/72

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.
MF-RX/72 SERIES, REV. F, 04/10
Specifi cations are subject to change without notice.
Customers should verify actual device performance in their specifi c applications.
Typical Time to Trip at 23 ˚C
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
MF-RX/72 Series - PTC Resettable Fuses
Model
0.001
0.01
100
0.1
10
1
0.1
-40 °C
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)
1
-20 °C
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
10
0 °C
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
Ambient Operating Temperature
23 °C
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
40 °C
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
0.001
1000
0.01
100
0.1
10
1
50 °C
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
Fault Current (Amps)
60 °C
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
10
70 °C
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
100
85 °C
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