Rxef300

Updated September 20, 2026

Overview

Product sourcing insights & recommendations

24 来源

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.

Based on these insights, you may want to proceed with:

Sources & References

24 sources cited · Verified industry data & reports

RXEF300-2 | RXEF Series Radial Leaded

Littelfuse

PolySwitch radial-leaded devices represent the most comprehensive and complete set of PPTC products. RXEF series offers low hold currents (down to 50mA) and ...

Littelfuse - RXEF300 - Resettable Fuse, PPTC, PolySwitch ...

Neobits.com

The RXEF300 is a radial leaded PolySwitch Resettable Device for balance of voltage and hold current down 50mA and voltage rating up to 72V,

RXEF300 Littelfuse

Mouser Electronics

RXEF300 Littelfuse Resettable Fuses - PPTC Radial Lead 3A 72V 40A Imax … 23.9 mm Length: 3 mm Pd - Power Dissipation: 2.8 W Product Type: Resettable Fuses

RXEF300 - Littelfuse Part Detail

TTI Europe

RXEF300 Resettable Fuses - PPTC Radial Lead 3A 72V 40A Imax Manufacturer: Littelfuse. Current 3 A Maximum Voltage 72 VDC Trip. Max 40 A Resistance 100 mOhms

RXEF300 Datasheet(PDF) - Tyco Electronics

ALLDATASHEET.COM

Part #: RXEF300. Download. File Size: 329Kbytes. Page: 28 Pages. Description: PolySwitch Resettable Devices Radial-leaded Devices.

RXEF300 LITTELFUSE, Resettable Fuse, PPTC, ...

Newark Electronics