Polymeric PTC Resettable Fuse 16V 3 A Ih Through Hole Radial, Disc
Engineering Specification
Product Name
RGEF300
General Description
RGEF300 is a resettable polymeric positive temperature coefficient protection device designed to safeguard electronic circuits against overcurrent and fault conditions. The component is intended for use in power distribution systems, low-voltage DC rails, and electronic assemblies where temporary overload protection and automatic recovery are required.
The device operates by increasing its internal resistance when subjected to excessive current or elevated temperature conditions, thereby limiting fault current and protecting downstream circuitry. Once the fault condition is removed and the device cools, it returns to a low-resistance state, allowing normal operation to resume without the need for manual replacement.
RGEF300 is widely used in industrial electronics, consumer devices, automotive subsystems, communication equipment, and embedded systems where reliable overcurrent protection and system uptime are critical. Its radial-leaded configuration supports straightforward integration into through-hole PCB designs and legacy circuit architectures.
The design emphasizes consistent trip behavior, stable reset characteristics, and long-term reliability under repeated fault conditions. It is suitable for applications requiring self-resetting protection elements that reduce maintenance requirements and improve system resilience.
Functional Requirements
Overcurrent Protection
The device shall limit current flow during fault conditions by increasing resistance when exposed to excessive current.
Automatic Reset
The device shall return to a low-resistance state once normal operating conditions are restored and thermal conditions stabilize.
Fault Isolation
The device shall provide temporary isolation of downstream circuitry during overcurrent events.
System Protection Support
The component shall support use in electronic systems requiring reusable protection elements for power input and distribution paths.
Electrical Requirements
Normal Operation
The device shall maintain low resistance under normal operating current conditions to minimize power loss.
Trip Behavior
The device shall transition to a high-resistance state when subjected to fault-level current conditions.
Thermal Response
The device shall respond to both electrical current and self-heating effects to initiate protective action.
Recovery Characteristics
The device shall restore normal conduction after fault clearance and thermal recovery.
Mechanical Requirements
Radial Leaded Construction
The device shall be provided in a through-hole radial package suitable for PCB mounting.
Structural Integrity
The component shall maintain mechanical stability during soldering, handling, and operational thermal cycling.
Board Integration
The device shall be compatible with standard PCB layouts used in power protection circuits.
Environmental Requirements
Operating Conditions
The device shall operate reliably in industrial, consumer, and embedded electronic environments.
Thermal Performance
The device shall tolerate repeated heating and cooling cycles associated with fault events.
Storage and Handling
The component shall maintain electrical and mechanical integrity during storage and transportation.
Quality Requirements
Reliability
The device shall support repeated fault recovery cycles without permanent degradation under specified operating conditions.
Verification
Electrical trip behavior, resistance recovery, and thermal response shall be validated through standard qualification testing.
Compliance
The product shall conform to applicable safety and electronic component standards for resettable overcurrent protection devices.
Documentation Requirements
Technical documentation shall include application guidelines, derating considerations, PCB layout recommendations, fault behavior characteristics, and integration practices for circuit protection design.
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