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MF-RX135/72-AP-14
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Product Detailed Parameters
- Description：FUSE PTC RESETTABLE
- Series：MF-RX/72
- Mfr：Bourns Inc.
- Package：Tape & Box (TB)
- Type：-
- Voltage - Max：72V
- Current - Hold (Ih) (Max)：1.35 A
- Current - Trip (It)：2.7 A
- Current - Max：40 A
- Time to Trip：9.6 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：0.483" L x 0.122" W (12.26mm x 3.10mm)
- Height - Seated (Max)：0.718" (18.26mm)
- Thickness (Max)：-
- Lead Spacing：0.201" (5.10mm)
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Overview
The Bourns MF-RX135/72-AP-14 is a radial leaded PTC resettable fuse from the MF-RX/72 series, rated for 72 VDC maximum voltage. It features a hold current of 1.35 A and a trip current of 2.7 A. The device has a typical resistance of 0.28 Ohms and a maximum trip time of 12 seconds at trip current. It operates within a temperature range of -40°C to +85°C and dissipates up to 1.6 W of power. The component measures 12.26 mm in length, 3.10 mm in width, and 18.26 mm in height, with a lead spacing of 5.10 mm.
Feature Summary
- Provides automatic circuit protection by increasing resistance during overcurrent conditions
- Self-resetting functionality eliminates the need for manual replacement after fault clearance
- Radial leaded construction facilitates through-hole PCB mounting
Applications
- Overcurrent protection for portable electronic devices
- Protection circuits in telecommunications equipment
- Power supply input stages for consumer electronics
Procurement Notes
Verify the specific suffix AP-14 against official Bourns documentation to confirm packaging type and tape/reel specifications. Ensure the hold current rating aligns with the target circuit's normal operating current to prevent nuisance tripping. Confirm compliance requirements such as UL or RoHS status directly from the manufacturer datasheet before procurement.
Selection Notes
Select this component when a 72 VDC system requires resettable protection with a 1.35 A hold current. Consider the physical dimensions and lead spacing for PCB layout compatibility. Evaluate the thermal environment to ensure operation remains 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 PTC resettable fuses. The series offers various hold currents and package options for different application needs. The MF-RX135 variant specifically targets applications requiring moderate current protection with standard radial leads.
Replacement Considerations
Direct substitutes include other MF-RX135/72 variants with compatible suffixes if packaging differs. Cross-reference with equivalent PTC fuses from other manufacturers ensuring matching voltage, hold current, and physical footprint constraints.
