Resettable Fuses – PPTC 60V .5A-HD 10A MAX

MF-SM050-2 – 60V 500mA Hold Current PTC Resettable Fuse – Bourns

Secure your circuits with the Bourns MF-SM050-2 polymeric PTC resettable fuse, designed for reliable overcurrent protection in demanding environments. This automotive-grade component automatically resets after fault conditions, minimizing downtime and maintenance costs. Engineered for surface-mount applications, it delivers robust performance with AEC-Q200 qualification for critical systems.

Key Features

• Voltage Rating: 60V maximum
• Hold Current (Ih): 500mA max
• Trip Current (It): 1A
• Peak Current: 40A max
• Fast Response: Trips within 4 seconds at 1A
• Low Resistance: 350mΩ initial (min), 1.4Ω post-trip (max)
• Automotive Grade: AEC-Q200 qualified
• Operating Range: -40°C to +85°C

Technical Specifications

Part of Bourns’ Multifuse® MF-SM series, this surface-mount PTC fuse features a compact 7.31mm x 5.44mm (0.287″ x 0.214″) 2-SMD package with 3.18mm thickness. Its polymeric construction provides repeatable circuit protection without replacement. Certified by cURus and TUV, it maintains stable performance across industrial temperature extremes while meeting stringent automotive reliability standards.

Typical Applications

• Automotive ECUs and infotainment systems
• Industrial control boards and power supplies
• USB ports and battery management circuits
• Telecommunications infrastructure
• Consumer electronics and IoT devices

About Bourns

Bourns Inc. is a globally recognized leader in electronic components, specializing in circuit protection solutions since 1947. The company pioneered the first commercial PTC resettable fuse and maintains ISO/TS 16949 certification for automotive applications. Bourns’ commitment to innovation is evidenced by over 500 patents, with rigorous quality controls ensuring component reliability in mission-critical systems.

Renowned for engineering excellence, Bourns serves aerospace, automotive, and industrial sectors with cutting-edge protection technologies. Their Multifuse® series sets industry benchmarks for resettable fuse performance, combining thermal stability with precise trip characteristics. PCX exclusively partners with Bourns to deliver authentic components backed by full technical documentation.

About PTC Resettable Fuses

Polymeric Positive Temperature Coefficient (PPTC) resettable fuses protect circuits from overcurrent damage by rapidly increasing resistance when exceeding predefined current thresholds. Unlike traditional fuses, they automatically reset when fault conditions subside, eliminating replacement costs and reducing system downtime. This self-recovery capability makes them ideal for hard-to-access applications.

PTC devices provide essential protection for voltage lines, battery packs, and I/O ports in modern electronics. Their non-linear resistance response safeguards sensitive components against short circuits and transient surges. When integrated into design architectures, they enhance product safety compliance while reducing warranty claims. The MF-SM050-2 exemplifies this technology with optimized trip speed and automotive-grade durability.

Packaging Options

Available in Tape & Reel (TR), Cut Tape (CT), and Digi-Reel® formats for automated assembly. Specify preferred packaging at checkout.

Frequently Asked Questions

Q: How does this PTC fuse reset after tripping?
A: It automatically returns to low-resistance state when fault current is removed and temperature normalizes (typically within seconds).

Q: Is the MF-SM050-2 suitable for 12V automotive systems?
A: Yes, its 60V rating exceeds 12V/24V automotive requirements, with AEC-Q200 qualification for vehicle electronics.

Q: What’s the difference between hold current and trip current?
A: Hold current (Ih=500mA) is the maximum current at which the fuse won’t trip. Trip current (It=1A) is the minimum current causing it to activate.

Q: Can I use this for USB 3.0 port protection?
A: Absolutely – its 500mA hold current and fast trip characteristics align perfectly with USB power specifications.

Q: Does PCX provide datasheets for this component?
A: Yes, download the full Bourns datasheet from our product page here.

Q: Are these fuses RoHS compliant?
A: Yes, all Bourns Multifuse® devices meet RoHS 3 directives.

Note: Product images are representational. Refer to datasheets for exact specifications.

Protect Your Design with Confidence – Order Bourns MF-SM050-2 Today!

PCX guarantees authentic Bourns components with same-day shipping from ISO-certified warehouses. Our technical support team is ready to assist with integration queries. Order now for reliable delivery!