KOA Speer RK73H1ETTP1001F 1K Ohm 1% 0402 SMD Thick Film Resistor 245 PCS

245 PCS KOA Speer RK73H1ETTP1001F precision thick-film surface-mount resistors with a nominal resistance of 1K ohm in the miniature 0402 package.

These resistors feature 1% tolerance and a 1/10 watt power rating. The RK73H series uses metal-glaze thick-film construction designed to provide stable electrical performance, good heat resistance, and reliable operation in modern surface-mount circuitry.

The 1K ohm value is one of the most widely used resistance values in electronics and is commonly found in bias networks, pull-up and pull-down circuits, current limiting, signal conditioning, transistor circuits, control electronics, communications equipment, digital circuitry, and general PCB repair.

The 0402 package measures approximately 1.0 x 0.5 mm, making these components suitable for compact and densely populated circuit boards where PCB space is limited.

The original Mouser distributor package identifies KOA Speer part number RK73H1ETTP1001F and country of origin China.

LIFECYCLE STATUS: ACTIVE

HISTORICAL BACKGROUND:
KOA traces its history to Japan and developed into a major international manufacturer of resistors and other passive electronic components used in industrial, automotive, communications, computing, consumer, and precision electronic equipment.

The growth of surface-mount technology transformed resistor manufacturing during the late twentieth century. Traditional axial resistors required holes drilled through a circuit board, while surface-mount resistors could be placed directly onto PCB pads using high-speed automated assembly equipment.

As electronics continued to shrink, manufacturers introduced increasingly smaller standardized resistor packages. The 0402 format became particularly important in compact electronics because it occupies only a fraction of the board area required by older through-hole components or larger SMD packages.

Despite its very small size, modern materials and manufacturing techniques allow an 0402 resistor such as the RK73H1ETTP1001F to provide precise 1% resistance tolerance and useful power capability.

The RK73H series uses thick-film technology in which a resistive material is applied to a ceramic substrate and precisely trimmed during manufacturing to establish the required resistance value.

The 1K ohm value has remained a fundamental component value across generations of electronic equipment. It appears throughout analog and digital circuitry and continues to be widely used in both current-production electronics and component-level repair work.

Modern precision manufacturing allows miniature resistors such as these to provide reliable characteristics that once required significantly larger components.