Low-voltage electronic circuits often require reliable overcurrent protection. The 30R600U is widely used in chargers and USB applications, but engineers and procurement teams frequently seek alternatives to ensure supply continuity and optimize costs. Semiware's SK30-600 is a dependable solution compatible with 30R600U specifications.
🔹 SK30-600 Key Electrical Parameters
| Parameter | Value |
| Part Number | SK30-600 |
| Package | SK30/30R |
| IHOLD (Max) (A) | 6.0 |
| ITRIP (Min) (A) | 12 |
| VMAX (V) | 30 |
| IMAX (A) | 40 |
| Time to Trip Current (A) | 30 |
| Time to Trip Time (s) | 16 |
| RMIN (Ω) | 0.005 |
| RMAX (Ω) | 0.04 |
🔹 SK30-600 Outline Drawing
⭐ Multiple outline drawings are provided to illustrate different lead configurations and mounting options.
🔹 Procurement Advantages:
- In-house production for stable quality and cost efficiency
- Flexible MOQ options
- Negotiable pricing for bulk orders
- Technical support and reliable supply
🔹 Typical Applications:
- High-current USB ports
- Fast-charging power adapters
- Portable consumer electronics requiring overcurrent protection
💡 Key Considerations When Choosing PPTC Resettable Fuse Replacement
When selecting an alternative to 30R600U, 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.
If you are designing compact circuits or upgrading overcurrent protection, Semiware provides a full range of SMD PTC fuses with stable performance and flexible supply. Detailed datasheets, cross-reference support, and technical guidance are available to help you select the right fuse for your application.
👉 Contact us to request product specifications, samples, or cross-reference recommendations.
❓ 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).
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