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Product Detailed Parameters
- Description:PTC RESET FUSE 72V 750MA RADIAL
- Series:MF-RX/72
- Mfr:Bourns Inc.
- Package:Tape & Box (TB)
- Type:-
- Voltage - Max:72V
- Current - Hold (Ih) (Max):750 mA
- Current - Trip (It):1.5 A
- Current - Max:40 A
- Time to Trip:6.3 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:0.409" Dia x 0.122" W (10.40mm x 3.10mm)
- Height - Seated (Max):0.630" (16.00mm)
- Thickness (Max):-
- Lead Spacing:0.201" (5.10mm)
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Overview
The Bourns MF-RX075/72-AP is a radial leaded PTC resettable fuse from the Multifuse MF-RX/72 series. It features a hold current of 750 mA and a trip current of 1.5 A, with a maximum voltage rating of 72 VDC. The device has a typical resistance of 0.3 Ohms and a power dissipation of 450 mW. It operates within a temperature range of -40°C to +85°C and utilizes a 5.1 mm lead spacing.
Feature Summary
- Provides overcurrent protection through polymer positive temperature coefficient technology
- Offers automatic circuit restoration after fault conditions clear
- Designed for robust performance in high voltage and high temperature environments
Applications
- Overcurrent and surge protection for consumer electronics
- Circuit protection for automotive electronic systems
- Protection for industrial communication equipment
- Safety system component integration
Procurement Notes
Verify the specific suffix AP against official Bourns documentation to confirm packaging details. Ensure the selected variant matches the required lead configuration and thermal characteristics for the target PCB layout. Cross-reference the datasheet for any recent engineering change notices that may affect physical dimensions or material compliance status before finalizing procurement orders.
Selection Notes
Select this component when a 72 VDC maximum voltage rating and a 750 mA hold current are required for radial mounting applications. Consider the 0.3 Ohm resistance value for potential voltage drop impacts in low voltage circuits. Evaluate the 450 mW power dissipation capability against expected ambient temperatures to ensure reliable operation without premature tripping during normal load cycles.
Part Context
This part belongs to the Multifuse MF-RX/72 series, which utilizes a 125°C polymer PTC element. The series is engineered to provide cost-effective protection in harsh environments while eliminating temperature-induced nuisance tripping. It serves as a reusable alternative to traditional single-use fuses in space-constrained designs.
Replacement Considerations
MF-RX075/72-0
FAQ
What is the maximum trip current for the MF-RX075/72-AP?
The maximum trip current is 1.5 A.
Does this component support surface mount installation?
No, this specific model uses a radial leaded package designed for PCB mounting via through-hole technology.
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