In the design of intelligent electronic products, overcurrent protection is a critical element in ensuring device safety and extending its lifespan. Especially in USB interfaces, power banks, smart handheld devices, and various consumer electronics products, unexpected currents can damage sensitive components and even pose safety hazards.
Therefore, choosing a stable and highly reliable resettable fuse is essential. The SMD1210P075TF-24, a 1210 packaged PTC resettable fuse, is specifically designed for these applications.
📌 SMD1210P075TF Working Principle
As a PTC (Positive Temperature Coefficient) resettable fuse, the SMD1210P075TF-24 rapidly increases its resistance under overcurrent conditions, limiting current flow and protecting downstream circuits from damage. Once the fault is cleared, the device automatically returns to a low-resistance state and can be reused. This feature not only improves the reliability of electronic products but also reduces maintenance costs and the risk of after-sales replacement.
📌 SMD1210P075TF-24 Key Electrical Parameters
| Parameter | Value |
| Part Number | SMD1210P075TF-24 |
| Package | SMD1210 |
| IHOLD (Max) (A) | 0.75 |
| ITRIP (Min) (A) | 1.5 |
| VMAX (V) | 24 |
| IMAX (A) | 100 |
| Time to Trip Current (A) | 8 |
| Time to Trip Time (s) | 0.1 |
| RMIN (Ω) | 0.07 |
| RMAX (Ω) | 0.45 |
📌 SMD1210P075TF-24 Typical Applications
1️⃣ USB Interface and Data Port Protection
- USB Hub
- USB Charging Port
- PC Peripherals, Smart Terminal Interface Board
2️⃣ Consumer Electronics
- Smart Speakers
- Routers, Set-Top Boxes
- Wearable Device Charging Modules
3️⃣ Batteries and Battery Protection Circuits
- Battery Protection Boards (PCM/BMS)
- Charge/Discharge Management Modules
- Portable Energy Storage Devices
4️⃣ Power Adapters and Charging Devices
- USB Chargers
- Power Banks
- Low-Power AC/DC or DC/DC Modules
5️⃣ Industrial and Communication Equipment (Low-Power Components)
- Industrial Control Boards
- Communication Interface Modules
- Sensor Power Supply Circuits
6️⃣ Smart Home and IoT Devices
- Smart Sockets
- Smart Door Locks
- Home Automation Control Modules
📌 SMD1210 vs SMD1206 PTC Resettable Fuse Comparison
The SMD1210 is suitable for circuits that require higher reliability and better heat dissipation. For circuits with limited space and lower operating current requirements, the SMD1206 can be selected.
Find the right SMD1210 PPTC fuse for your design👇
If you are developing new products or upgrading existing protection designs, we offer a full range of SMD1210 PPTC fuses. They are of stable quality, have flexible delivery times, and come with technical support.
👉 Contact us for product specifications, samples, or cross-reference recommendations.
📩 sales29@semiware.com
❓ FAQs
1.What is a PPTC fuse?
A PPTC fuse is a 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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