RXEF300 PPTC Fuse Specifications & Sourcing Guide

The RXEF300 is a specific model of Polymeric Positive Temperature Coefficient (PPTC) resettable fuse, primarily manufactured by Littelfuse (under the PolySwitch brand). It is designed for overcurrent protection in applications requiring a balance of high voltage rating (up to 72V) and steady hold currents (3.0A) Littelfuse Littelfuse.

Product Specifications & Technical Data

The RXEF300 belongs to the RXEF radial-leaded series, known for its ability to reset after a fault, reducing maintenance costs compared to traditional fuses Littelfuse.

Feature	Specification Littelfuse Datasheet
Model Number	RXEF300 (or RXEF300-2 for tape & reel)
Voltage (Vmax)	72V (Maximum operating voltage)
Hold Current (Ihold)	3.0A (Current it can hold without tripping)
Trip Current (Itrip)	6.0A (Current that triggers the high-resistance state)
Trip Time (Max)	19.8 seconds at 15A
Resistance Range	0.04 Ω (Rmin) to 0.12 Ω (R1max post-trip)
Operating Temp	-40°C to +85°C

Market Trends & Insights (2026 Outlook)

The market for resettable devices like the RXEF300 is projected to grow steadily, driven by the global shift toward electrification Linkedin Fortunebusinessinsights.

* Market Value: The electric fuse market is expected to grow from $6.30B in 2026 to $10.88B by 2034, with a CAGR of 7.05% Fortunebusinessinsights.

* Key Growth Drivers:

* Electric Vehicles (EVs): Rapid adoption of EVs requires PPTCs for battery management systems (BMS) and onboard charging circuits, with a segment CAGR of 8.57% Fortunebusinessinsights.

* Industrial Automation: Increased demand for overcurrent protection in robotics and "Industry 4.0" control panels Fortunebusinessinsights.

* Consumer Electronics: Proliferation of USB-C and sensitive wearable tech maintains demand for compact, resettable protection.

* Regional Trends: The Asia-Pacific region (particularly China and India) dominates production and consumption, holding over 43% of the global market share Fortunebusinessinsights.

Sourcing & Supply Chain

Direct B2B sourcing for RXEF300 is active, though perfect "RXEF300" branded matches can be scarce in generic searches compared to technical equivalents .

* Availability: Ready-to-ship stock is available from Shenzhen-based suppliers, with prices typically ranging from $0.04 to $0.65 per unit depending on quantity Alibaba Alibaba.

* Customization: Several verified manufacturers offer OEM and material customization, allowing for specific lead spacing or post-trip resistance adjustments Alibaba.

For detailed procurement options and technical comparisons, please refer to the attached search results.