CRH1206F1R10P05S 1206 1.1R 0.5W Low-TCR High-Power Resistor Overview

1. Product Introduction

The CRH1206F1R10P05S is a standard model in EVER OHMS' CRH series of thick-film high-power chip resistors. It comes in a 1206 (imperial) package, equivalent to 3216 metric, with a nominal resistance of 1.1Ω, ±1% tolerance, and a 0.5W power rating at 70°C ambient. The optional suffix "S" indicates that this device, within the 1Ω≤R<10Ω range, employs a low-TCR alloy film construction, achieving a temperature coefficient of ±100ppm/°C — significantly better than the ±400ppm/°C typical of conventional thick-film resistors in the same package.

For circuit designs that require both substantial power handling and resistance stability in a compact footprint, the 1206 1.1R 0.5W EVER OHMS resistor delivers a balanced combination of power density and thermal drift control.

2. Part Number Breakdown

3. Key Electrical Specifications

The rated voltage is calculated as E = √(P×R), approximately 0.74V at 1.1Ω. Short-time overload testing applies 2.5× the rated voltage or the max overload voltage (whichever is lower) for 2 seconds, with resistance change limited to ±(1.0%+0.05Ω) for ±1% parts.

4. Technical Features

Low-TCR Alloy Film

Conventional thick-film resistors in the 1Ω–10Ω range typically exhibit a TCR of ±400ppm/°C. The CRH1206F1R10P05S, with its "S" option, reduces this to ±100ppm/°C. Across the full operating range of -55°C to +155°C (a 130°C span relative to the 25°C reference), maximum resistance drift is approximately ±1.3%. Combined with the ±1% initial tolerance, total deviation remains within a predictable envelope — an important consideration for current sensing and feedback loop applications.

High Power Density

The 1206 package supports a 0.5W rating, double the 0.25W typical of standard thick-film chips in the same footprint. Full-power operation is available up to 70°C; beyond that, power must be derated linearly per the manufacturer's derating curve, reaching zero at 155°C. Designers should account for ambient temperature when sizing the device.

Reliability

The series passes a comprehensive reliability suite: resistance to soldering heat (260±5°C, 10s) ≤ ±(0.5%+0.05Ω); rapid temperature change (-55°C to +155°C, 5 cycles) ≤ ±(0.5%+0.05Ω); load life (70°C, 1000h) ≤ ±(1.0%+0.05Ω); damp heat with load (40°C, 90–95%RH, 1000h) ≤ ±(1.0%+0.05Ω). Insulation resistance is ≥10GΩ.

5. Typical Applications

• Power management: Current sensing and current-limit detection in DC-DC converters and LDO regulators
• Consumer electronics: Smartphone, tablet, and laptop motherboards and charging circuits
• Home appliances: Control boards and power modules in air conditioners and refrigerators
• Communications: Signal conditioning and power distribution in base stations, routers, and fax equipment
• LED lighting and drivers: Constant-current control resistors in LED driver circuits
• Test and measurement: Detection circuits in electric meters and navigation equipment requiring precision and low drift

In current-sensing configurations, 1.1Ω at 0.5W supports a continuous current of approximately 0.67A (P = I²R), making it suitable for low-to-medium power current detection.

6. Distribution and Sourcing

EVER OHMS is a Taiwan-based specialty resistor manufacturer. The CRH series is distributed through authorized channels in mainland China.

Shenzhen Shunhai Technology Co., Ltd. , an authorized distributor of EVER OHMS resistors, maintains ready stock of CRH series values and offers original datasheets, sample support, and volume fulfillment — well suited for prototyping and small-to-medium production runs.

Huanian Mall provides online selection and ordering for the full EVER OHMS chip resistor lineup. With real-time inventory visibility, low minimum order quantities, and fast shipping, it enables engineers to procure complete BOMs in a single transaction.

Both channels supply genuine factory product. Buyers may choose based on project volume and lead-time requirements.

7. Selection Notes

• At ambient temperatures above 70°C, recalculate available power using the derating curve
• For applications demanding tighter TCR, consider EVER OHMS' MFR metal-foil low-resistance series
• The 1206 1.1R 0.5W EVER OHMS resistor is a standard catalog part with stable lead times; non-standard values or tolerances can be arranged through the distributor
• Soldering should follow J-STD-020, with peak temperature not exceeding 260°C