MF-RX300/72-2 Bourns Inc., MF-RX300/72-2 Datasheet - Page 3

• Manufacturer Part Number: MF-RX300/72-2
• Description: FUSE PTC RESETTABLE
• Manufacturer: Bourns Inc.
• Series: MF-RX/72r
• Type: PTC Resettable Fusesr

Specifications of MF-RX300/72-2

• Voltage - Max: 72V
• Current - Max: 40A
• Current - Hold (ih) (max): 3A
• Current - Trip (it): 6A
• R Min/max: 0.040 ~ 0.060 Ohm
• Time To Trip: 19.8s
• Package / Case: Radial
• Hold Current: 3 Amps
• Trip Current: 6 Amps
• Current Rating (max): 40 Amps
• Resistance: 0.06 Ohms
• Maximum Voltage: 72 VoltsDC
• Termination Style: Radial
• Mounting Style: Through Hole
• Dimensions: 20.67 mm L x 3.1 mm W x 26.67 mm H
• Lead Spacing: 10.2 mm
• Operating Temperature Range: - 40 C to + 85 C
• 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-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 -
-40
1.71
2.09
2.48
2.87
3.88
4.65
5.81
°
C
-20
1.50
1.84
2.18
2.52
3.40
4.08
5.10
PTC Resettable Fuses
°
C
0.001
1000
0.01
100
0.1
10
1
1
0
1.31
1.61
1.90
2.20
2.98
3.57
4.46
°
C
Fault Current (Amps)
23
Ambient Operating Temperature
1.10
1.35
1.60
1.85
2.50
3.00
3.75
°
10
C
40
Customers should verify actual device performance in their specific applications.
0.89
1.09
1.30
1.50
2.03
2.43
3.04
°
C
100
50
0.79
0.97
1.15
1.33
1.80
2.16
2.70
°
C
Specifications are subject to change without notice.
60
0.69
0.85
1.01
1.17
1.58
1.89
2.36
°
C
MF-RX/72 SERIES, REV. B, 11/04
70
0.59
0.73
0.86
1.00
1.35
1.62
2.03
°
C
85
0.44
0.54
0.64
0.74
1.00
1.20
1.50
°
C