Panasonic ERJ-2RKF1001X 1K ohm 1% 0.1W 0402 Automotive SMD Resistor 50 PCS

Panasonic ERJ-2RKF1001X surface-mount thick-film resistor rated 1K ohm, ±1% tolerance, and approximately 0.1 W in the compact 0402 / 1005 metric package.

This device belongs to Panasonic’s ERJ automotive-grade chip-resistor family and carries AEC-Q200 qualification for demanding electronic applications. The 1K-ohm value is widely used in bias networks, pull-up and pull-down circuits, signal conditioning, LED circuits, feedback networks, digital interfaces, and general PCB repair.

Original Mouser packaging identifies Panasonic ERJ-2RKF1001X, 0402 size, 1K ohm, 1% tolerance, thick-film construction, and AEC-Q qualification. The label shows country of origin China and date code 2127.

Lifecycle: ACTIVE.

HISTORICAL BACKGROUND: Panasonic traces its origins to 1918, when Konosuke Matsushita founded the business that grew into one of Japan’s largest electronics manufacturers. Panasonic later became a major global supplier not only of consumer electronics but also resistors, capacitors, relays, switches, batteries, sensors, semiconductors, and industrial electronic components.

The ERJ family became one of Panasonic’s widely used surface-mount resistor lines as electronic manufacturing shifted toward automated PCB assembly. Thick-film resistor construction uses a resistive material deposited onto a ceramic substrate and precisely trimmed to achieve the required resistance value.

The 0402 package became especially important as circuit boards became smaller and component density increased. At approximately 1.0 x 0.5 mm, this package allows designers to fit large numbers of passive components into compact digital, communications, automotive, and industrial assemblies.

A ±1% tolerance provides considerably better resistance accuracy than traditional ±5% general-purpose resistors, making this device useful in circuits where bias levels, divider ratios, gain, or logic thresholds depend on controlled resistance values.

AEC-Q200 qualification identifies the component family as having undergone reliability testing intended for demanding automotive environments involving temperature variation, humidity, vibration, mechanical stress, and extended operating life.