CRH1206F1R80P05S EVER OHMS High Power Thick Film Chip Resistor: 1206 1.8R 0.5W

The CRH1206F1R80P05S is a high power thick film chip resistor from EVER OHMS (Tianer Technology), part of the CRH series. It features a standard 1206 package (metric 3216), a nominal resistance of 1.8Ω, ±1% tolerance, and a rated power of 0.5W. Its key advantage lies in doubling the power rating of a standard 1206 thick film resistor — from 0.25W to 0.5W — without requiring any PCB layout changes, while retaining the current-handling capability of a 1.8Ω low-resistance value.

Part Number Decoding

Understanding the EVER OHMS CRH naming convention helps with accurate selection. CRH denotes the high power thick film chip resistor series, distinct from the standard CR series. 1206 is the imperial package size (metric 3216, approximately 3.2mm × 1.6mm). The letter F indicates ±1% tolerance (B = ±0.1%, D = ±0.5%, J = ±5% in the same series). In “1R80,” the “R” represents the decimal point, giving a nominal resistance of 1.80Ω. P05 is the power code for 0.5W (1/2W), and the trailing S designates packaging and environmental compliance.

Key Electrical Specifications

The CRH1206F1R80P05S offers the following electrical characteristics: nominal resistance 1.8Ω, tolerance ±1%, rated power 0.5W at 70°C ambient, temperature coefficient of resistance (TCR) ±400ppm/°C, and an operating temperature range of −55°C to +155°C. The maximum working voltage for the 1206 package is approximately 200V. The product complies with RoHS (2011/65/EU) and does not contain REACH SVHC declared substances.

Since 1.8Ω falls in the low-resistance range, the practical limiting factor in most circuits is power dissipation and temperature rise rather than voltage withstand. At the 0.5W rating, the allowable continuous current is approximately 0.53A. A derating margin of 1.5× to 2× is recommended to avoid long-term resistance drift under sustained full-load operation.

Technical Advantages

Double power density without PCB redesign. Standard 1206 thick film resistors are typically rated at 0.25W. The CRH series achieves 0.5W in the same footprint through a high-alumina ceramic substrate (≥96% Al₂O₃), a ruthenium-based thick film resistive layer, and a triple-layer termination structure. Existing 1206 pads and PCB layouts require no modification — a direct part number substitution resolves localized heating or insufficient power margin issues.

Low-resistance current handling. At 1.8Ω, this resistor is well suited for current limiting, bleeder, soft-start, and current feedback circuits. EVER OHMS optimizes electrode geometry and resistive paste formulation in the low-resistance range to minimize contact resistance errors, ensuring the actual resistance closely tracks the nominal value.

Thick film pulse tolerance. The thick film process combined with an alumina ceramic substrate provides good short-duration overload capability. During power-up inrush or load transient events, the resistor resists resistance drift and film damage, protecting downstream circuitry.

Termination reliability. EVER OHMS employs a triple-layer electrode structure — Ni-Cr inner layer, nickel barrier, and tin (lead-free) outer plating — providing excellent solder wetting and thermal shock resistance. Terminations resist cracking or detachment after multiple reflow cycles or temperature excursions.

Typical Applications

With its 0.5W power rating and 1.8Ω low resistance, the CRH1206F1R80P05S suits the following circuit functions: current limiting and dummy load in switching power supply outputs, constant-current limiting in LED drivers, overcurrent detection in battery protection boards, current sensing at DC-DC converter outputs, pull-up/pull-down and gate series resistors in MCU peripherals, and signal chain limiting and biasing in industrial control boards.

Sourcing Recommendation

When selecting the 1206 1.8R 0.5W EVER OHMS resistor, sourcing through authorized distribution channels is advised to ensure traceability and consistent quality. Shenzhen Shunhai Technology Co., Ltd. serves as a professional distributor for EVER OHMS resistors, offering substantial in-stock inventory, stable supply capability, and one-stop BOM support suitable for both prototyping and volume production. Huanian Mall provides an online component procurement platform with transparent pricing and fast shipping, particularly convenient for urgent replenishment and small-batch trial runs.

Related part number: CRH1206J1R80P05Z (±5% tolerance version) for applications with relaxed precision requirements.

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