Products Desc.
A 30V PPTC (Polymeric Positive Temperature Coefficient) resettable fuse is a type of circuit protection device that is designed to provide overcurrent protection in electronic circuits with a voltage rating of up to 30 volts. PPTC fuses are also commonly known as PolySwitch devices or resettable fuses due to their ability to reset themselves after tripping in response to an overcurrent event.
Features of PPTC Fuses
1. Resettable: One of the significant advantages of a PPTC fuse is that it is resettable. When an overcurrent condition occurs, the PPTC fuse will heat up, causing the polymeric material to expand and increase its resistance dramatically. This action limits the current flow and effectively opens the circuit, protecting it from damage. Once the fault is removed, the PPTC fuse will cool down and return to its low-resistance state, effectively resetting itself and allowing the circuit to function again.
2. Quick Response Time: PPTC fuses have a fast response time to overcurrent events, providing reliable protection against excessive currents that may damage electronic components.
3. Temperature Dependence: The resettable characteristic of PPTC fuses is temperature-dependent. The device will trip at a specific temperature threshold, and the ambient temperature can affect the trip and hold current levels.
4. Small Form Factor: PPTC resettable fuses are available in various package sizes, including surface-mount and through-hole options, making them suitable for use in a wide range of electronic devices and circuit applications.
Product Data
| Item name: | 30V PPTC Resettable Fuse | Rating Current: |
0.9A to 10A |
| Rating Voltage: | 30V | Breaking Capacity: | Low |
| Type: | Radial Lead | Usage: | Electrical PTC, PPTC Resettable Fuse |
| Reset Type: | Auto Reset | Application: | Communication System |
| Color: | Yellow | Safety Standards: | UL, ROHS |
Products Details
|
P/N |
A | B | C | D | E | Physical Characteristics | |
| Max. | Max. | Typ. | Min. | Max. | Style | Lead φmm | |
| TRB090 | 7.4 | 12.2 | 5.1 | 7.6 | 3.1 | 3 | 0.50 |
| TRB110 | 10.7 | 16.7 | 5.1 | 7.6 | 3.1 | 1 | 0.50 |
| TRB120 | 10.7 | 16.7 | 5.1 | 7.6 | 3.1 | 1 | 0.50 |
| TRB135 | 10.7 | 16.7 | 5.1 | 7.6 | 3.1 | 1 | 0.50 |
| TRB160 | 11.0 | 16.8 | 5.1 | 7.6 | 3.1 | 1 | 0.60 |
| TRB185 | 11.5 | 17.9 | 5.1 | 7.6 | 3.1 | 1 | 0.60 |
| TRB250 | 13.0 | 18.3 | 5.1 | 7.6 | 3.1 | 2 | 0.60 |
| TRB300 | 13.0 | 18.3 | 5.1 | 7.6 | 3.1 | 2 | 0.81 |
| TRB400 | 16.4 | 24.8 | 5.1 | 7.6 | 3.1 | 2 | 0.81 |
| TRB500 | 21.3 | 26.4 | 10.2 | 7.6 | 3.1 | 2 | 0.81 |
| TRB600 | 20.8 | 29.8 | 10.2 | 7.6 | 3.1 | 2 | 0.81 |
| TRB700 | 20.8 | 29.8 | 10.2 | 7.6 | 3.1 | 2 | 0.81 |
| TRB800 | 24.2 | 32.9 | 10.2 | 7.6 | 3.1 | 2 | 0.81 |
| TRB900 | 24.2 | 32.9 | 10.2 | 7.6 | 3.1 | 2 | 0.81 |
Electricle Characteristic
| P/N | IH, (A) | IT,(A) | Vmax,(V) | lmax,(A) | (A) | (Sec.) | Pd typ,(W) | R min, | R max, | R1 max, |
| TRB090 | 0.90 | 1.80 | 30 | 40 | 4.50 | 5.9 | 0.60 | 0.090 | 0.230 | 0.300 |
| TRB110 | 1.10 | 2.20 | 30 | 40 | 5.50 | 6.6 | 0.70 | 0.060 | 0.160 | 0.260 |
| TRB120 | 1.20 | 2.40 | 30 | 40 | 6.00 | 6.5 | 0.70 | 0.050 | 0.115 | 0.255 |
| TRB135 | 1.35 | 2.70 | 30 | 40 | 6.75 | 7.3 | 0.80 | 0.040 | 0.095 | 0.170 |
| TRB160 | 1.60 | 3.2 | 30 | 40 | 8.00 | 8.0 | 0.90 | 0.030 | 0.095 | 0.160 |
| TRB185 | 1.85 | 3.7 | 30 | 40 | 9.25 | 8.7 | 1.00 | 0.030 | 0.070 | 0.110 |
| TRB250 | 2.50 | 5.0 | 30 | 40 | 12.5 | 10.3 | 1.20 | 0.020 | 0.048 | 0.072 |
| TRB300 | 3.00 | 6.00 | 30 | 40 | 15.0 | 10.8 | 2.00 | 0.015 | 0.050 | 0.075 |
| TRB400 | 4.00 | 8.00 | 30 | 40 | 20.0 | 12.7 | 2.50 | 0.010 | 0.030 | 0.045 |
| TRB500 | 5.00 | 10.00 | 30 | 40 | 25.0 | 14.5 | 3.00 | 0.008 | 0.025 | 0.045 |
| TRB600 | 6.00 | 12.00 | 30 | 40 | 30.0 | 16.0 | 3.50 | 0.005 | 0.020 | 0.030 |
| TRB700 | 7.00 | 14.00 | 30 | 40 | 35.0 | 17.5 | 3.80 | 0.003 | 0.016 | 0.025 |
| TRB800 | 8.00 | 16.00 | 30 | 40 | 40.0 | 18.8 | 4.00 | 0.004 | 0.015 | 0.023 |
| TRB900 | 9.00 | 18.00 | 30 | 40 | 40.0 | 20.0 | 4.00 | 0.004 | 0.010 | 0.015 |
How Does A Resettable Fuse work?
A Resettable Fuse, also known as a Polymeric Positive Temperature Coefficient (PPTC) fuse or a Polyfuse, works based on the concept of positive temperature coefficient of resistance (PTC). When there is a normal operating current flow through the PPTC fuse, it behaves as a low-resistance element, allowing current to pass through with minimal voltage drop.
However, when an overcurrent situation occurs, such as a short circuit or an excessive current draw, the PPTC fuse rapidly heats up due to the increased power dissipation caused by the higher current passing through it. As the temperature rises, the polymer material within the PPTC fuse expands, leading to a significant increase in its resistance. This rise in resistance restricts the flow of current, effectively acting as a self-resetting circuit protection device.
The key working principle of a Resettable Fuse can be summarized in these steps:
Normal Operation: During normal operating conditions, the PPTC fuse allows current to pass through with minimal resistance, behaving like a regular low-resistance conductor.
Overcurrent Event: If an overcurrent event occurs, such as a short circuit or an excessive current draw, the current passing through the PPTC fuse increases significantly.
Rapid Heating: The higher current flow generates heat within the PPTC fuse due to its electrical resistance. This causes the temperature of the polymer material inside the fuse to rise.
Polymer Expansion: As the temperature increases, the polymer material within the PPTC fuse undergoes expansion. This expansion causes a physical change in the structure of the material.
Resistance Increase: The polymer material's expansion leads to a substantial increase in the resistance of the PPTC fuse. This increased resistance restricts the current flow through the fuse.
Current Limiting: The higher resistance effectively limits the current passing through the PPTC fuse, protecting the circuit and its components from damage caused by the overcurrent event.
Cooling and Reset: Once the overcurrent event is removed or the current returns to normal levels, the PPTC fuse starts to cool down. As it cools, the polymer material contracts back to its original state, reducing the resistance of the fuse.
Restoration of Circuit: With the resistance back to its low level, the PPTC fuse returns to its original conductive state, allowing current to flow through the circuit again.
Appilcation
1. Consumer Electronics: PPTC fuses are commonly used in various consumer electronic devices, such as smartphones, tablets, laptops, cameras, and gaming consoles. These fuses protect the sensitive electronic components from damage due to overcurrent events.
2. Power Adapters and Chargers: Power supplies, adapters, and chargers can experience overcurrent situations, especially during a short circuit or when the load exceeds the device's capacity. PPTC fuses safeguard these devices from damage caused by excessive currents.
3. Automotive Electronics: In the automotive industry, PPTC fuses are used to protect various electronic systems, such as infotainment systems, power windows, and central locking mechanisms, from overcurrent events.
4. LED Lighting: PPTC fuses can be used in LED lighting systems to protect the LED driver and other components from overcurrent and short circuit conditions.
5. Telecommunications Equipment: In telecommunication systems, PPTC fuses are utilized to safeguard sensitive equipment and prevent damage from power surges or overcurrent events.
Factory Info
Our factory, Dongguan Senreach, covers an area of 4,000 square meters and has a monthly production capacity of 50 million pieces. We specialize in the design, development, manufacturing, and distribution of advanced solutions for safeguarding against over-current, over-temperature, and over-voltage situations. Our extensive range of products finds broad applications in various industries such as consumer electronics, automotive, marine, telecommunications, power supplies, power tools, renewable energy, and more. Our comprehensive product portfolio includes a variety of offerings such as automotive fuses, fuse holders, current fuses, current fuse holders, temperature fuses, SMD fuses, resettable fuses, circuit breakers, thermal switches, and more.
With a commitment to meeting international standards, our products carry certifications such as UL, UR, CSA, BSI, CUL, VDE, TUV, PSE, CE, CCC, and ROHS, ensuring compliance with strict quality and safety requirements.
Our commitment to excellence and customer satisfaction sets us apart. We understand the critical role these electrical components play in ensuring the safe and efficient operation of various systems and equipment. That's why we adhere to rigorous quality standards and utilize advanced manufacturing processes to produce products of exceptional reliability and durability.
When you choose Dongguan Senreach, you gain a trusted partner with a proven track record and an unwavering commitment to customer satisfaction. We are ready to collaborate with you, understand your unique needs, and provide tailored solutions that meet your exact specifications. Experience the difference of partnering with Dongguan Senreach, your reliable source for fuses, fuse holders, circuit breakers, and thermostats with over 20 years of industry expertise.
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Our advantage
Price Advantage
Our factory offers a significant price advantage to our customers. Through efficient production processes, economies of scale, and strategic sourcing, we are able to keep our costs competitive. We aim to provide high-quality products at affordable prices, ensuring that our customers receive excellent value for their investment.
Guaranteed Quality
We adhere to stringent quality control measures throughout the manufacturing process to ensure that our products meet the highest standards. Our dedicated quality assurance team conducts thorough inspections and tests at various stages, from raw materials to finished products.
Stock Wholesale
We specialize in wholesale operations, offering our products directly to retailers, distributors, and other business customers. By eliminating middlemen and unnecessary markups, we provide competitive wholesale pricing to our clients. The wholesale model allows us to establish long-term partnerships and deliver products in bulk quantities, meeting the diverse needs of our customers.
One-Stop service
From product design and development to manufacturing, packaging, and shipping, we handle every aspect of the production process. Our experienced team of professionals assists our customers at every stage, ensuring seamless communication, efficient collaboration, and timely delivery.
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We’re confident in the design and quality of our 30V PPTC Resettable Fuse. If you are not sure whether our parts correctly fit your appliance, please feel free to contact us or ask a question.
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