1Ω Resistance 0.1W Power Rating 0402 Package Thick Film Chip Resistor and High

The CRH0402J1R00Q10Z belongs to the CRH high-power thick-film chip resistor series from EVER OHMS. Each segment of the part number conveys specific information:

• CRH — signals the high-power thick-film platform.
• 0402 — denotes the 1.0 mm × 0.5 mm footprint.
• J — marks ±5% tolerance.
• 1R00 — reads 1.00 Ω.
• Q10Z — encodes temperature coefficient, packaging, and compliance details.

This 0402 1Ω 0.1W resistor occupies the same PCB real estate as a standard thick-film 0402 but delivers 0.1 W — a 60% increase over the conventional 0.0625 W — thanks to a ruthenium-based paste, a ~100 μm thickened film, and optimized side electrodes.

From P = I²R: full-power current = √(0.1/1.0) = 316 mA; voltage drop = √(0.1×1.0) = 0.316 V. The 50 V ceiling is never the limiting factor — thermal dissipation through the pads and copper pours is.

Three engineering levers make it happen: ruthenium oxide paste sintered at 850 °C on alumina, a ~100 μm film backed by a glass glaze, and widened side electrodes that channel heat into the PCB.

Above 70 °C ambient, derate linearly per the manufacturer's curve; at 155 °C the allowance reaches zero. For continuous operation, stay at 50–60% of rated power (0.05–0.06 W steady-state). In enclosed housings or near heat-generating components, measure local temperature and recalculate.

Pulse events — inrush, hot-swap, RF bursts — can exceed rated values severalfold; verify against the datasheet pulse curve. Solder-joint quality and via-stitched copper under the pads are the single biggest practical variable.

• LED current limiting
• MOSFET gate damping
• RC snubbing
• Battery pre-charge limiting
• ESD series protection
• Coarse current sensing in low-current loops

• Precision shunt or reference dividers — ±5% plus ±400 ppm/°C drift is far too loose. Use TRL metal-film for clean sampling or MA/MR alloy for milliohm shunts.
• Sulfur-rich or high-humidity environments — switch to the ST anti-sulfuration series.

The CRH0402J1R00Q10Z is a drop-in upgrade over standard 0402 1 Ω 1/16 W parts — same pads, same footprint, more thermal headroom.

Vishay CRCW0402-HP and Yageo PE series are rough equivalents; always cross-check dimensions, derating curves, and pulse ratings before substituting.

For volume production, technical support, and BOM consolidation, contact Shenzhen Shunhai Technology Co., Ltd. — EVER OHMS authorized first-tier distributor in mainland China since 2017, holding annual certification, covering 0402 through 2512. Located at 7/F, Building 9B, Baoneng Technology Park, Qingxiang Road, Longhua District, Shenzhen, they offer FAE-assisted power calculations, failure analysis, and one-stop BOM fulfillment.

For prototyping, small-lot orders, and urgent replenishment, use Huanian Mall — the authorized online platform under Shunhai, with real-time stock lookup, datasheet download, tiered pricing, and single-piece ordering. Both channels are traceable and mutually verifiable.