Polymeric PTC Resettable Fuse 6V 3 A Ih Surface Mount 1812 (4532 Metric), Concave The 1812L300MR is a surface-mount resettable fuse (PPTC – Polymer Positive Temperature Coefficient) designed to provide overcurrent protection in electronic circuits. When excessive current flows, the device increases its resistance sharply, limiting current to a safe level. Once the fault condition is removed and power is cycled or reduced, the device resets automatically. This component is commonly used in power supply lines, battery-powered devices, USB ports, and general consumer electronics where resettable protection is preferred over one-time fuses. Key Features Resettable overcurrent protection device (PPTC technology) Surface-mount package (1812 footprint) Automatic recovery after fault removal Low resistance in normal operation Fast trip response to overcurrent events RoHS compliant and lead-free Electrical Characteristics Hold Current (I_hold): 3.0 A Trip Current (I_trip): ~6.0 A Maximum Voltage Rating: 6 VDC Maximum Current Rating: 40 A (short duration fault) Initial Resistance (R_min / R_max): ~0.015 Ω / 0.050 Ω Trip Time: Dependent on current and ambient conditions Thermal Characteristics Operating Temperature Range: -40°C to +85°C Storage Temperature Range: -40°C to +85°C Typical Power Dissipation: Dependent on fault condition Mechanical Characteristics Package Type: Surface Mount (SMD) Package Size: 1812 (4.5 mm × 3.2 mm approx.) Termination: Nickel barrier with matte tin plating Mounting: Reflow solder compatible Applications Power supply protection USB and peripheral ports Battery pack protection Consumer electronics Industrial control circuits Compliance and Standards RoHS compliant Halogen-free (depending on manufacturer variant) UL recognized (check specific manufacturer certification) Notes Trip and hold currents are specified at 25°C; derating is required at higher temperatures Device performance depends on PCB layout and thermal environment Proper spacing and copper area improve heat dissipation and reliability #commonpartslibrary #circuitprotection #ptc #fuse

Polymeric PTC Resettable Fuse 24V 3 A Ih Surface Mount 1812 (4532 Metric), Concave #commonpartslibrary #fuse #ptc #polymeric

Resettable Fuses K1812L300DR F1812 LCSC Part Number: C2892442 JLCPCB Part Class: Extended Part Manufactured by KUU

Resettable Fuses 1812L300/24GR F1812 LCSC Part Number: C20627123 JLCPCB Part Class: Extended Part Manufactured by LUTE(陆特)

Resettable Fuses ASMD1812-300 F1812 LCSC Part Number: C135366 JLCPCB Part Class: Extended Part Manufactured by JDTfuse(集电通)

Chip Resistor - Surface Mount FRC1812J300 TS R1812 LCSC Part Number: C2933945 JLCPCB Part Class: Extended Part Manufactured by FOJAN(富捷)

Power Relays OMI-SS-112L,300 RELAY-TH_TE_OMI-SS-D LCSC Part Number: C1563341 JLCPCB Part Class: Extended Part Manufactured by TE Connectivity(美国泰科)

Resettable Fuses 1812L350SLPR F1812 LCSC Part Number: C3762556 undefined Manufactured by Littelfuse(美国力特)

Resettable Fuses 1812L200THPR F1812 LCSC Part Number: C207074 JLCPCB Part Class: Extended Part Manufactured by Littelfuse(美国力特)

Polymeric PTC Resettable Fuse 12V 2A Ih Surface Mount 1812 (4532 Metric), Concave #CommonPartsLibrary #Fuse #CircuitProtection #PTC