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RXEF300 PTC Resettable Fuse

Name: RXEF300 PTC Resettable Fuse
Brand: RKSEMITRONICS
Price: 8 INR
Availability: InStock

Price 8 INR/ Piece

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MOQ : 500 Pieces

RXEF300 PTC Resettable Fuse Specification

Response Time
Typical response less than a few seconds at overload

Power Supply
Not applicable (passive component)

Interface
Radial leads; through-hole mounting

Components
Polymer PTC element with tin-plated leads

Features
Resettable protection, fast reaction, low maintenance

Input
Current up to specified hold current

Usage
Circuit protection in electronic assemblies

IP Rating
Not rated

Operating Temperature
-40C to +85C

Power Source
Current flowing through circuit

Output
Open circuit on fault, resumes conduction when normal

Product Type
PTC resettable fuse (Polymeric Positive Temperature Coefficient device)

Application
Telecom, automotive, power supplies, consumer electronics

Rated Voltage
72V max

Supply Voltage
Up to 60V (typical)

Size
Radial leaded

Dimension (L*W*H)
12.2 mm x 7.4 mm x 2.6 mm (approximate)

Function
Overcurrent protection; self-resetting after fault removal

Color
Yellow body; black marking

Weight
Approx. 0.35 g

Current Rating
Hold current: 3.0A, Trip current: 6.0A

Thickness
Approx. 2.6 mm

Residual Resistance (R1max)
0.10 Ohms max

Storage Temperature
-40C to +85C

Initial Resistance (Rmin/Rmax)
0.038-0.070 Ohms

Maximum Fault Current
40A at 72VDC

UL Approval
Recognized (E174545)

Compliant Standards
RoHS, UL

Lead Pitch
5.1 mm

Maximum Interrupt Voltage
Max 72VDC

Marking
RXEF300 on body

RXEF300 PTC Resettable Fuse Trade Information

Minimum Order Quantity
500 Pieces

Supply Ability
1000 Pieces Per Month

Delivery Time
10 Days

Main Domestic Market
All India

About RXEF300 PTC Resettable Fuse

Our radial-leaded products represent the most comprehensive and complete set of PPTC products available in the industry today. RGEF series for hold currents up to 14A. RHEF series for flatter thermal derating and operating temperatures up to 125C. RUEF series for balance of voltage rating (30V) and hold current (up to 9A). RUSBF series for fast time-to-trip and low-resistance computer applications. RXEF series for low hold currents (down to 50mA) and high voltage rating (up to 72V). RKEF series for balance of voltage rating (60V) and hold current (up to 5A). LVR series for line voltage rated applications now offering RoHS versions of all products.

Features:

Resettable and single-use overcurrent devices
Wide range of form factor and termination methods
Devices compatible with high-volume electronics assembly

Applications:
Consumer and Industrial

Satellite video receivers
Industrial controls
Transformers
Computer motherboards
Modems
USB hubs, ports and peripherals
IEEE 1394 ports
CD-ROMs
Game machines
Battery packs
Phones
Fax machines
Analog and digital line cards
Printers

Features:

Resettable and single-use overcurrent devices
Wide range of form factor and termination methods
Devices compatible with high-volume electronics assembly

Applications:
Consumer and Industrial

Satellite video receivers
Industrial controls
Transformers
Computer motherboards
Modems
USB hubs, ports and peripherals
IEEE 1394 ports
CD-ROMs
Game machines
Battery packs
Phones
Fax machines
Analog and digital line cards

Reliable Overcurrent Protection

The RXEF300 provides self-resetting overcurrent protection, ensuring your circuit is safeguarded without the need for manual intervention. Its polymer PTC technology reacts rapidly to overload conditions and restores normal operation once the fault is removed, minimizing downtime in sensitive electronics.

Compact, Robust Design

With dimensions of approximately 12.2 mm x 7.4 mm x 2.6 mm and a lightweight construction, this fuse fits conveniently into various electronic assemblies. The robust tin-plated leads offer easy through-hole mounting and consistent conductivity for dependable performance.

Wide-Ranging Applications

Engineered for versatility, the RXEF300 is suitable for telecom devices, automotive modules, power supply circuits, and consumer gadgets. Its ability to handle typical supply voltages up to 60V makes it an ideal choice for industrial and consumer electronics requiring reliable circuit protection.

FAQ's of RXEF300 PTC Resettable Fuse:

Q: How does the RXEF300 PTC resettable fuse operate to protect circuits?

A: The RXEF300 functions by increasing resistance rapidly and interrupting current flow when an overcurrent or short-circuit is detected. Once the fault is resolved, the fuse cools down and automatically resets, resuming normal operation without the need for a replacement.

Q: What are the key benefits of using the RXEF300 in electronic assemblies?

A: The RXEF300 offers several advantages, including self-resetting functionality, rapid response to overcurrent events, reduced maintenance, and compliance with RoHS and UL standards. Its compact size and reliable design make it ideal for safeguarding delicate circuits.

Q: When should I use the RXEF300 in my design?

A: Use the RXEF300 when your circuit requires robust overcurrent protection and the ability to automatically restore after fault clearance. It's best suited for applications handling voltages up to 72VDC and currents up to 3.0A in environments such as telecom, automotive, and consumer electronics.

Q: Where is the RXEF300 typically mounted in a device?

A: The RXEF300 is designed for through-hole mounting on printed circuit boards (PCBs). Its radial lead configuration ensures secure and reliable installation in assemblies where space-saving and robust protection are required.

Q: What is the process for resetting the RXEF300 after an overcurrent event?

A: No manual reset is needed. Once the overload condition is cleared and the fuse cools down below its threshold temperature, the RXEF300 automatically returns to its low-resistance, conductive state, allowing normal current flow to resume.

Q: How can I identify the RXEF300 on a circuit board?

A: The RXEF300 features a distinctive yellow body with black marking. The part number 'RXEF300' is clearly printed on the fuse for easy identification during inspection or maintenance activities.

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