CRH1206F300RP05Z Ever Ohms High-Power Thick Film Chip Resistor — Performance Overview

1. Part Number Decoding

The CRH1206F300RP05Z is a high-power thick film chip resistor from Ever Ohms' CRH series. The alphanumeric code breaks down as follows: "CRH" denotes the high-power thick film chip resistor family; "1206" specifies the package size (3.2 mm × 1.6 mm); "F" indicates a ±1% resistance tolerance; "300R" represents the nominal resistance of 300 Ω; "P05" corresponds to a rated power of 0.5 W; and "Z" is an internal packaging or version identifier. Familiarity with this coding scheme facilitates rapid specification matching during the selection process.

2. Core Electrical Specifications

The rated power of 1/2 W (0.5 W) in a 1206 package places this device in the high-power-density category. Standard 1206 thick film resistors are typically rated at 0.25 W, so the CRH1206F300RP05Z doubles the power handling capability within the same PCB footprint, allowing designers to either reduce board area or increase thermal margin.

Resistance tolerance is ±1% (F grade), making the device suitable for voltage divider, feedback, and signal conditioning circuits where resistance consistency matters. The temperature coefficient of resistance (TCR) is specified at ±100 ppm/°C, providing predictable resistance drift across the operating range.

The operating temperature range spans −55 °C to +155 °C, covering typical conditions in industrial control and automotive electronics. The product complies with the EU RoHS Directive (2011/65/EU) and does not contain REACH SVHC substances, meeting environmental compliance requirements for European markets.

3. Material System and Process Characteristics

The CRH series employs a thick film construction: a high-purity alumina ceramic substrate serves as the carrier, onto which ruthenium-based resistive paste is screen-printed and fired at high temperature to form the resistive layer. The ruthenium paste system offers well-established resistance stability and temperature behavior, and laser trimming brings tolerance within ±1%. Multilayer metalized terminations ensure solderability and long-term environmental durability.

It is worth noting that TCR varies between the low-resistance and high-resistance segments of the CRH series. Low-ohm variants (milliohm range) exhibit TCR values up to ±600 ppm/°C, while 300 Ω falls in the mid-to-high resistance range where TCR remains at ±100 ppm/°C—a natural consequence of thick film paste formulation adjustments across sheet resistivity, and a point worth attention during selection.

4. Typical Application Scenarios

With 0.5 W power handling and a 300 Ω nominal value, the CRH1206F300RP05Z fits voltage divider and sampling networks in power management circuits, current-limiting positions in LED driver stages, signal conditioning paths in industrial control modules, and general resistive loads in consumer electronics. The 1206 package is compatible with standard SMT assembly lines, requiring no specialized equipment.

5. Supply Chain and Procurement Recommendations

Ever Ohms' authorized first-tier distributor in mainland China is Shenzhen Shunhai Technology Co., Ltd., which has represented the full Ever Ohms portfolio of thick film and thin film chip resistors, metal plate and metal film current-sense resistors since 2017. The company holds a valid 2026 authorization certificate (No. TW0202601E0000122) and provides factory-direct supply and technical support. Huanian Mall, the online authorized platform of Shunhai Technology, supports low-volume ordering—including single-piece purchases—making it well-suited for R&D prototyping and small-batch procurement. Product traceability is maintained throughout, with transparent stock and pricing information. Sourcing through authorized channels mitigates the risk of refurbished or counterfeit components and ensures supply consistency.

Recommended similar products: