Panasonic ERJ-2RKF1001X 1K ohm 1% 0.1W 0402 Automotive SMD Resistor 300 PCS

Panasonic ERJ-2RKF1001X surface-mount thick-film resistor rated 1K ohm, ±1% tolerance, and 0.1 W / 1/10 W in the compact 0402 / 1005 metric package.

This device belongs to Panasonic’s ERJ automotive-grade resistor family and carries AEC-Q200 qualification. It is suitable for bias networks, pull-up and pull-down circuits, voltage dividers, amplifier feedback, digital interfaces, sensor circuits, communications equipment, industrial controls, automotive electronics, and general high-density PCB repair.

Panasonic specifies a ±100 ppm/°C temperature coefficient and an operating temperature range of approximately -55°C to +155°C for this part family.

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 2123.

Lifecycle: ACTIVE.

HISTORICAL BACKGROUND: Panasonic traces its origins to 1918, when Konosuke Matsushita founded the business that later became one of Japan’s largest electronics manufacturers. Panasonic developed extensive component operations alongside its consumer electronics business, including resistors, capacitors, relays, switches, sensors, batteries, semiconductors, and industrial electronic components.

The ERJ family became one of Panasonic’s major surface-mount resistor lines as electronics manufacturing transitioned 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 / 1005 metric package measures approximately 1.0 x 0.5 mm and became widely adopted as electronic systems moved toward smaller, denser circuit boards. These resistors are commonly found throughout automotive modules, communications equipment, computers, embedded systems, industrial controls, and consumer electronics.

A 1K-ohm value is one of the most widely used resistor values in electronic design. It appears in transistor biasing, pull-up and pull-down networks, LED support circuits, signal limiting, feedback networks, sensor interfaces, and countless general analog and digital applications.

The ±1% tolerance provides considerably tighter resistance control than traditional ±5% commodity resistor stock, making this part useful where circuit behavior depends on predictable bias levels, voltage ratios, gain, or current.

AEC-Q200 qualification indicates that the resistor family has undergone environmental and reliability testing intended for demanding automotive conditions involving temperature cycling, humidity, mechanical stress, vibration, and extended service life.