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MF-RX135-2
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Product Detailed Parameters
- Description：PTC RESET FUSE 60V 1.35A RADIAL
- Series：Multifuse®, MF-RX
- Mfr：Bourns Inc.
- Package：Tape & Reel (TR)
- Type：Polymeric
- Voltage - Max：60V
- 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)：120 mOhms
- Resistance - Post Trip (R1) (Max)：300 mOhms
- Operating Temperature：-40°C ~ 85°C
- 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 MF-RX135-2 is a polymeric resettable fuse manufactured by Bourns Inc. It features a maximum operating voltage of 60V and a hold current (Ih) of 1.35A. The device has an initial resistance minimum of 120 mOhms and a post-trip resistance maximum of 300 mOhms. It supports a maximum trip current of 40A with a typical time to trip of 9.6 seconds. The component operates within a temperature range of -40°C to 85°C and utilizes through-hole radial mounting.
Feature Summary
- Polymeric PTC technology for overcurrent protection
- Through-hole radial lead configuration
- Self-resetting functionality after fault clearance
Applications
- Electronic circuit overcurrent protection
- Battery pack safeguarding
- Peripheral device interface circuits
Procurement Notes
Verify the specific suffix designation against official Bourns documentation, as variants such as MF-RX135/72-2 exist with different voltage ratings. Confirm that the 60V rating aligns with your system requirements, as other models in the series support higher voltages like 72V. Ensure the hold current of 1.35A meets the continuous load specifications of the target application without premature tripping.
Selection Notes
Select this component when a 60V maximum voltage rating is required for circuit protection. The 1.35A hold current defines the normal operating limit, while the 40A max current indicates the trip threshold capability. Consider the 120 mOhms initial resistance for minimal voltage drop during normal operation. Evaluate the 9.6-second trip time against the surge tolerance requirements of the protected load to ensure appropriate response characteristics.
Part Context
This part belongs to the MF-RX series of multifuse resettable fuses from Bourns. These devices utilize polymeric positive temperature coefficient materials to provide automatic reset capabilities. The series offers various voltage and current ratings to suit different electronic protection needs. The MF-RX135-2 represents a specific configuration within this broader product family designed for through-hole applications.
Replacement Considerations
Public confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with alternative PTC fuses based on matching voltage, current, and package dimensions.
