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MF-RX135-2-99
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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-RX135-2-99 is a polymeric PTC resettable fuse manufactured by Bourns Inc. It features a hold current of 1.35A and a maximum trip current of 2.7A, with a voltage rating of 60V. The component supports a maximum fault current of 40A and has a time to trip of 9.6 seconds. Physical dimensions include a lead spacing of 0.201 inches (5.10mm) and a seated height of 0.718 inches (18.26mm). It utilizes through-hole radial mounting and is RoHS compliant.
Feature Summary
- Polymeric positive temperature coefficient construction for automatic circuit protection
- Resettable functionality eliminates the need for manual replacement after fault clearance
- Through-hole radial disc package design facilitates standard PCB assembly processes
Applications
- Overcurrent protection in consumer electronic devices
- Circuit safeguarding in telecommunications equipment
- Protection for portable battery-powered applications
Procurement Notes
Verify component status as this specific part number is listed as obsolete and no longer manufactured by the original producer. Confirm availability of authorized distributors or surplus stock if procurement is required. Ensure that any substitute components meet identical electrical ratings and physical footprint requirements to maintain system integrity and compliance standards.
Selection Notes
Select this component based on its 1.35A hold current and 60V rating for low-voltage DC circuits. Consider the 40A maximum current capability for handling transient faults. Evaluate the through-hole radial form factor against available board space. Verify thermal derating requirements for the intended operating environment to ensure reliable performance over the product lifecycle.
Part Context
This device belongs to the RX series of polymeric resettable fuses from Bourns Inc. These components are designed for circuit protection where traditional fuses are impractical due to maintenance constraints. The series offers various current and voltage ratings to suit different application needs within the broader portfolio of passive circuit protection solutions.
Replacement Considerations
The MF-RX135-2-99 is marked as obsolete. Potential substitutes include the MF-RX135-AP-99 or similar variants within the same family. Verify that alternative parts match the 1.35A hold current, 60V rating, and radial through-hole package dimensions before integration.
