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Product Detailed Parameters
- Description:PTC RESET FUSE 72V 900MA RADIAL
- Series:MF-RX/72
- Mfr:Bourns Inc.
- Package:Tape & Box (TB)
- Type:-
- Voltage - Max:72V
- Current - Hold (Ih) (Max):900 mA
- Current - Trip (It):1.8 A
- Current - Max:40 A
- Time to Trip:7.2 s
- Resistance - Initial (Ri) (Min):-
- Resistance - Post Trip (R1) (Max):-
- Operating Temperature:-
- Grade:-
- Qualification:-
- Ratings:-
- Mounting Type:Through Hole
- Package / Case:Radial, Disc
- Size / Dimension:0.461" Dia x 0.122" W (11.70mm x 3.10mm)
- Height - Seated (Max):0.657" (16.70mm)
- Thickness (Max):-
- Lead Spacing:0.201" (5.10mm)
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Overview
The Bourns MF-RX090/72-AP is a radial leaded PPTC resettable fuse from the Multifuse MF-RX/72 series. It features a 72 VDC maximum voltage rating and a 0.9 A hold current. The device trips at 1.8 A with a maximum trip time of 7.2 seconds. It supports a maximum fault current of 40 A and has a typical resistance of 0.14 Ohms. Operating temperatures range from -40°C to +85°C, with a power dissipation of 1 W.
Feature Summary
- Provides overcurrent protection using polymer positive temperature coefficient technology.
- Designed for robust performance in high-voltage and high-temperature environments.
- Offers automatic circuit restoration after fault conditions clear.
Applications
- Automotive circuit protection
- Industrial transportation systems
- Communication equipment
- Consumer electronics
Procurement Notes
Verify the specific suffix against official documentation to confirm packaging type and compliance status. Ensure the selected variant matches the required hold current and voltage ratings for the target application. Cross-reference the manufacturer part number with authorized distributor listings to confirm authenticity and availability.
Selection Notes
Select this component when a 72 VDC system requires a 0.9 A hold current with radial leaded mounting. Consider the 40 A maximum interrupting rating for short-circuit scenarios. Evaluate the thermal environment to ensure operation within the specified -40°C to +85°C range without derating issues.
Part Context
This part belongs to the Bourns Multifuse MF-RX/72 series of polymeric resettable fuses. These devices are engineered for applications demanding reliable overcurrent protection in harsh conditions. The series utilizes advanced polymer PTC elements to provide cost-effective circuit safeguarding.
Replacement Considerations
MF-RX090/72-0 is a verified substitute within the same series offering identical electrical characteristics but potentially different packaging.
FAQ
What is the maximum fault current rating?
The MF-RX090/72-AP supports a maximum fault current of 40 A.
What is the trip time at the trip current?
The maximum trip time at 1.8 A is 7.2 seconds.
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