1210L005WR PTC Resettable Fuse: Reliable Overcurrent Protection for Electronics
1210L005WR PTC Resettable Fuse: Advanced Circuit Protection for Modern Electronics
The 1210L005WR from Littelfuse Inc. is a premium PTC (Positive Temperature Coefficient) resettable fuse engineered to deliver robust and reusable overcurrent protection for a wide range of electronic devices. As part of the Circuit Protection category, this polymeric fuse ensures safety and reliability in demanding applications, from consumer gadgets to industrial systems.
Why Choose the 1210L005WR PTC Resettable Fuse?
In today's electronics landscape, protecting circuits from overcurrent and short-circuit events is critical. The 1210L005WR stands out due to its:
- Self-resetting capability No need for manual replacement after tripping.
- Fast response time Trips in just 1.5 seconds to minimize damage.
- Compact surface-mount design Perfect for space-constrained PCBs.
- Wide operating temperature range (-40 C to 85 C) Reliable in harsh environments.
Detailed Technical Specifications
Electrical Characteristics
- Maximum Voltage: 30V DC
- Hold Current (Ih): 50mA (max)
- Trip Current (It): 150mA
- Initial Resistance: 3.6 Ohms (min)
- Post-Trip Resistance: 50 Ohms (max)
Physical Attributes
- Package: 1210 (3225 Metric) concave
- Dimensions: 3.22mm 2.58mm 1.25mm
- Mounting: Surface mount (SMD)
Applications and Use Cases
The 1210L005WR is exceptionally versatile, making it ideal for:
1. Consumer Electronics
Protect smartphones, tablets, and wearables from current surges that could damage sensitive components.
2. Telecommunications Equipment
Ensure reliable operation of routers, switches, and base stations with automatic fault recovery.
3. Industrial Control Systems
Maintain uptime in manufacturing equipment where overcurrent events could cause costly downtime.
4. Automotive Electronics
Withstand the challenging automotive environment while protecting ECUs and infotainment systems.
Comparative Advantages
When compared to traditional fuses, the 1210L005WR offers significant benefits:
| Feature | 1210L005WR | Traditional Fuse |
|---|---|---|
| Reset Capability | Automatic | Requires replacement |
| Response Time | 1.5 seconds | Varies |
| Lifetime | Thousands of cycles | Single use |
Installation and Design Considerations
For optimal performance when using the 1210L005WR:
- Ensure proper PCB pad layout matches the 1210 package dimensions
- Maintain adequate clearance for heat dissipation
- Consider ambient temperature effects on hold current
- Verify maximum fault current doesn't exceed 10A
Frequently Asked Questions
Q: How many times can the 1210L005WR reset?
A: The fuse can typically withstand hundreds of trip-reset cycles while maintaining performance.
Q: What happens if the fault current exceeds 10A?
A: The device may fail to protect properly. Always design with adequate current margins.
Q: Is this RoHS compliant?
A: Yes, the 1210L005WR meets RoHS environmental standards.
Purchasing and Availability
The 1210L005WR is currently in active production and available through authorized Littelfuse distributors worldwide. Bulk pricing is available for high-volume applications.
Conclusion
For engineers seeking reliable, space-efficient circuit protection, the 1210L005WR PTC resettable fuse represents an optimal solution. Its combination of fast response, automatic reset capability, and compact form factor make it superior to traditional fuses for most low-voltage applications up to 30V.
By incorporating the 1210L005WR into your designs, you benefit from Littelfuse's decades of circuit protection expertise while future-proofing your products against overcurrent events. Its reusable nature also contributes to lower maintenance costs and reduced environmental impact compared to disposable fuses.
For more technical details or to request samples, visit our product page or contact Littelfuse technical support today.