MF-RX090/72-0 Bourns Inc., MF-RX090/72-0 Datasheet - Page 11

• Manufacturer Part Number: MF-RX090/72-0
• Description: FUSE PTC RESETTABLE 0.9A HOLD
• Manufacturer: Bourns Inc.
• Series: MF-RXr

Specifications of MF-RX090/72-0

• R Min/max: 0.140 ~ 0.310 Ohm
• Voltage - Max: 72V
• Time To Trip: 7.2s
• Current - Hold (ih) (max): 900mA
• Current - Trip (it): 1.8A
• Current - Max: 40A
• Package / Case: Radial
• Tripping Current: 1.8A
• Initial Resistance Max: 0.31ohm
• Svhc: No SVHC (15-Dec-2010)
• Approval Category: UL Recognised
• Body Diameter: 11.7mm
• Case Material: Epoxy Polymer
• Current Max: 40A
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

How To Order
Agency File Numbers
MSMF = Surface Mount
SMHT = High Temp. Surface Mount
Bourns® Multifuse® Product Designator
Series
Hold Current, I hold
Voltage Options:
Packaging Options
NSMF = Surface Mount
SMDF = Surface Mount
USMF = Surface Mount
PSMF = Surface Mount
RHT = High Temp. Radial Mount
VSN = Axial Leaded Strap
Max. Interrupt Voltage, V
Construction Options:
Resistance Sorted**
(see individual data sheets)
Resistance Bins of 0.5 Ω***
SVS = Axial Leaded Strap
SM = Surface Mount
***Radial Leaded products only.
RG = Radial Leaded
RX = Radial Leaded
LR = Axial Leaded Strap
VS = Axial Leaded Strap
**Telecom Radial Leaded products only.
LS = Axial Leaded Strap
- AP = Ammo-Pak
D = Disk Configuration
R = Radial Leaded
*Axial Leaded Strap products only.
UL File Number................................................E 174545S
CSA File Number .............................................CA 110338
TÜV File Number ............................................R2057213
S = Axial Leaded Strap
- 0 = Bulk Packaging
- 2 = Tape and Reel
SS = Slotted Lead Option (two sides)*
05 = 0.5 Ω
N = Narrow Device Option (3.6 mm)*
U = Uncoated
T = Pretripped **
S = Slotted Lead Option (one side)*
MF - RX 012/250 U - A 05 - 2
11
Definitions
Agency Approvals
Current, Hold (I hold )
Current, Maximum (I max )
Current, Trip (I trip )
Fault Current
Positive Temperature Coefficient (PTC)
Resistance, Post Trip (R 1max )
Resistance, Post Reflow (R 1max )
Voltage, Maximum (V max )
Product Selection Worksheet
1. What is the normal circuit operating current (I hold )
2. What is the maximum circuit voltage (V max )
3. What is the maximum fault current (I max )
4. What is the preferred form factor
Note: Other factors including thermal derating and time to
trip characteristics may be important application
considerations. Please refer to the full Bourns® data sheet of
each product at www.bourns.com/multifuse.
Bourns® PPTCs are certified under UL, CSA, IEC and
TÜV registration programs.
The maximum current a PPTC device can pass without
interruption.
The maximum fault current a PPTC device can
withstand without damage at the rated voltage.
The minimum current that will switch a PPTC from the
low resistance to the high resistance state.
The peak current that flows through a PPTC or wire
during a short circuit or arc back.
A characteristic of the PPTC device that describes the
large increase in resistance as the device reaches its
switching (trip) temperature.
The maximum resistance one hour after a PPTC device
has been tripped and power has been removed.
The maximum resistance one hour after a PPTC surface
mount device has been reflow soldered.
The maximum voltage a PPTC device can withstand
without damage at the rated current.