Littelfuse PolySwitch 2920L Resettable Fuse PPTC, 33V DC, 1.85A

The Littelfuse 2920L185DR is a POLYFUSE® Resettable PTC device designed to provide reliable and resettable overcurrent protection in space-constrained, medium-voltage electronic applications. Unlike traditional fuses that must be replaced, this PPTC (Polymeric Positive Temperature Coefficient) device automatically resets once the fault condition is removed and the device cools, ensuring continuous circuit protection and reduced maintenance.

Featuring a fast response to fault currents, this surface-mount component offers a high voltage rating and a low-profile form factor. It is engineered to hold at a nominal current of 1.85A and will trip to a high-resistance state at a fault current of 3.7A, effectively interrupting the circuit to protect sensitive components.

Ideal Applications

This resettable fuse is perfectly suited for safeguarding critical circuits in modern electronics. Its compact design and reliable performance make it an essential component for:

• Computers and servers
• Computer peripherals
• Consumer electronics
• Automotive electronic systems

Key Specifications

• Device Type: Resettable PPTC Fuse
• Product Range: PolySwitch 2920L Series
• Case Style: 2920 (7351 Metric)
• Voltage Rating: 33V DC
• Hold Current (Ihold): 1.85A
• Trip Current (Itrip): 3.7A
• Time to Trip: 2.5 seconds
• Maximum Fault Current: 40A
• Operating Temperature Range: -40°C to +85°C
• Dimensions (L x W x H): 15mm x 33mm x 43mm
• Mounting: Surface Mount (SMD)

With its robust construction and proven PolySwitch technology from Littelfuse, this resettable fuse delivers dependable overcurrent protection, helping to enhance the safety and longevity of your electronic designs.