RXEF185K-2

Introduction

The RXEF185K-2 is a resettable polymeric positive temperature coefficient (PPTC) device belonging to the category of circuit protection components. This entry provides an overview of its basic information, specifications, pin configuration, functional features, advantages and disadvantages, working principles, application field plans, and alternative models.

Basic Information Overview

Category: Circuit Protection Component
Use: Overcurrent Protection
Characteristics: Resettable, Polymeric, Positive Temperature Coefficient
Package: Radial Leaded
Essence: Provides overcurrent protection by increasing resistance when current exceeds the threshold
Packaging/Quantity: Available in tape and reel packaging, quantity varies based on supplier

Specifications

Maximum Voltage: 60V
Hold Current: 1.85A
Trip Current: 3.7A
Operating Temperature Range: -40°C to 85°C
Resistance: <0.05Ω (Initial), >1Ω (Tripped)

Detailed Pin Configuration

The RXEF185K-2 has a radial leaded package with two pins. Pin 1 is the input terminal, and pin 2 is the output terminal.

Functional Features

Resettable: Returns to low resistance state after the fault is removed
Overcurrent Protection: Limits current flow to protect the circuit
Polymeric PTC: Utilizes polymeric materials for enhanced performance

Advantages and Disadvantages

Advantages

Resettable functionality increases product lifespan
Provides reliable overcurrent protection
Compact design suitable for space-constrained applications

Disadvantages

Limited maximum voltage compared to some alternatives
Trip current may not be adjustable

Working Principles

When the current flowing through the RXEF185K-2 exceeds the trip current, the device heats up and its resistance increases significantly, limiting the current flow. Once the fault is removed, the device cools down and returns to its low-resistance state.

Detailed Application Field Plans

The RXEF185K-2 is commonly used in various electronic devices and systems requiring overcurrent protection, including: - Battery Management Systems - Power Supplies - Automotive Electronics - Industrial Control Systems

Detailed and Complete Alternative Models

RXEF110-2: Lower hold and trip currents, suitable for low-power applications
RXEF250-2: Higher hold and trip currents, suitable for high-power applications
RXEF185K-3: Similar characteristics with different packaging options

In conclusion, the RXEF185K-2 offers reliable overcurrent protection with resettable functionality, making it suitable for a wide range of electronic applications.

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