SK30-700 – Your 30R700U Replacement for Consumer Electronics and Chargers

For higher-current low-voltage circuits, 30R700U is a popular choice. However, Semiware‘s SK30-700 offers a reliable alternative with similar electrical characteristics and multiple outline options for flexible integration.

🔹 SK30-700 Key Electrical Parameters

🚀 Advantages of Semiware's PPTC Resettable Fuse

For purchasing and engineering professionals, Semiware's SK30-500 offers the following advantages: 👇

• Stable and reliable performance
• Manufactured in our own factory, allowing us to offer customers highly competitive pricing.
• Compatible with common 30R series resettable fuses
• Reliable supply and technical support
• Reduces certification risks associated with alternative components

✔️ SK30-700 Typical Applications

• USB and charging interfaces in laptops and tablets
• Power adapters for consumer devices
• Circuit protection in portable electronics

🔹 SK30-700 Outline Drawing

💡 Key Considerations When Choosing PPTC Resettable Fuse Replacement

When selecting an alternative to PPTC resettable fuse, several factors should be carefully reviewed:

• Hold current and trip characteristics to ensure proper protection behavior
• Voltage rating compatibility for low-voltage circuits
• Radial-leaded package to match existing PCB layouts
• Time-to-trip performance for effective fault response
• Compliance requirements, such as RoHS and lead-free standards
• A suitable alternative should meet these requirements while maintaining stable and repeatable performance.

SK30-700 is an ideal 30R700U replacement for engineers and procurement teams looking for reliable, low-voltage overcurrent protection. 👉https://en.semiware.com/product-pptc/sk30-700/

👉 Contact us to request product specifications, samples, or cross-reference recommendations.

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❓ FAQs

1.What is PPTC Thermistors?

PPTC Thermistors is resettable overcurrent protection device that increases its resistance when excessive current flows and automatically resets after the fault is removed.

2.How does it compare to traditional fuses?

Traditional fuses are single-use and must be replaced after tripping, while PPTC fuses reset automatically and require no maintenance—ideal for consumer and portable electronics.

3.How does a PPTC fuse work?

During overcurrent, the polymer material heats up and expands, sharply increasing resistance to limit current. After cooling, it returns to its low-resistance state, restoring normal operation.

4.What is the difference between PPTC and PTC?

PPTC is a polymer-based PTC device designed specifically for resettable overcurrent protection, while standard PTC components are typically used for temperature sensing or inrush current limiting.

5.What is the difference between NTC and PTC?

NTC resistance decreases as temperature rises (used for sensing and inrush limiting), while PTC resistance increases with temperature (used for protection or heating functions).