CRH2512F249RE04Z (2512 249R 2W Resistor) by EVER OHMS — A Comprehensive Overview
In circuit designs for power management, industrial control, and various consumer appliances, the 2512 249R 2W resistor is frequently selected by engineers thanks to its generous power headroom and tight resistance tolerance. EVER OHMS' CRH2512F249RE04Z is a representative high-power thick film chip resistor in this exact specification. Below we break down its part number, parameters, advantages, and application scenarios one by one.
CRH2512F249RE04Z (2512 249R 2W Resistor) by EVER OHMS — A Comprehensive Overview
In circuit designs for power management, industrial control, and various consumer appliances, the 2512 249R 2W resistor is frequently selected by engineers thanks to its generous power headroom and tight resistance tolerance. EVER OHMS' CRH2512F249RE04Z is a representative high-power thick film chip resistor in this exact specification. Below we break down its part number, parameters, advantages, and application scenarios one by one.
1. Part Number Decoding
EVER OHMS' CRH series follows a disciplined naming convention — CRH2512F249RE04Z tells you everything at a glance:
- CRH: High-power thick film chip resistor series, distinct from the standard-power CR series
- 2512: EIA imperial package size, metric approx. 6.4 mm × 3.2 mm
- F: Resistance tolerance ±1%
- 249R: Nominal resistance 249Ω
- E04Z: Temperature coefficient and lead-free RoHS compliant code, corresponding to the 2W power grade
2. Key Parameters
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Parameter
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Specification
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|---|---|
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Brand
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EVER OHMS
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Category
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High-power thick film chip resistor
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Package
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2512 (6.4 × 3.2 mm)
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Resistance
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249Ω (249R)
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Tolerance
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±1%
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Rated Power
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2W (at 70℃)
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Working Voltage
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200V
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TCR
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±100 ppm/℃
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Operating Temp.
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-55℃ ~ +155℃
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Packaging
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Tape & Reel
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Compliance
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RoHS compliant
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💡 The 2W rated power is the continuous full-load value at 70℃ ambient. Above 70℃, power must be derated linearly per the official EVER OHMS derating curve, reaching 0W at 155℃.
3. Product Advantages
Doubled power in the same footprint
While a conventional 2512 thick film chip resistor is typically rated at 1W (at 70℃), the CRH series pushes it to 2W — doubling the power capability without changing the land pattern, saving board space in high-power designs.
Thick film process — balanced cost and performance
The resistive layer is formed by screen-printing ruthenium-based oxide paste and high-temperature sintering, delivering low cost with high power density. The ±1% tolerance and ±100 ppm/℃ TCR guarantee signal accuracy in precision voltage divider and feedback loop applications.
Stable across a wide temperature range
The -55℃ to +155℃ operating window allows this 2512 249R 2W resistor to perform reliably from cold outdoor equipment to high-temperature industrial sites.
SMT-friendly for mass production
Supplied in tape-and-reel with nickel/tin-plated terminations compatible with standard reflow and wave soldering, ideal for high-volume automated SMT lines.
4. Typical Applications
This 2512 249R 2W resistor covers a broad application spectrum:
🔌 Power Management & Charging
Switch-mode power supplies (AC-DC / DC-DC), LED drivers, and fast chargers use it for voltage division, feedback networks, and surge suppression. The 2W headroom absorbs inrush currents at power-on, preventing resistance drift from transient power spikes.
🔋 Battery Management Systems (BMS) & Energy Storage
In Li-ion protection boards, power tools, drones, and BMS for energy storage, the 249R value is commonly used in voltage sensing and balancing divider circuits. The larger 2512 footprint aids heat dissipation, improving reliability in high-temperature environments.
🏭 Industrial Control & Motor Drives
PLCs, inverters, servo drives, and DC/BLDC motor controllers rely on it for voltage division, signal conditioning, and current limiting. The wide temperature range matches the harsh EMI and thermal conditions of industrial sites.
📱 Consumer Appliances & Communications
Main control boards of air conditioners, refrigerators, LCD monitors; signal processing circuits in mobile phones and fax machines; measuring instruments such as electricity meters and navigation devices — the 2512 249R 2W resistor is a common choice across all of these.
🚗 Automotive Electronics
In automotive BMS and motor control units, the AEC-Q200 compliant CRH series serves as divider and sense elements, withstanding vibration, shock, and temperature cycling during vehicle operation.
5. Recommended Distribution Channels
The electronic component market carries risks of refurbished or non-conforming parts. We recommend purchasing through authorized distributors to ensure authenticity and supply stability:
🏢 Shenzhen Shunhai Technology Co., Ltd.
A Tier-1 authorized distributor of EVER OHMS in mainland China with over 15 years of component distribution experience. Shunhai offers the full portfolio of thick film and alloy current-sense resistors, supports customized resistance values and tolerance grades, and provides stable supply assurance and technical support for emerging fields such as fast charging, energy storage, and industrial power supplies.
🛒 HuaNian Mall (华年商城)
Provides procurement services for the full range of EVER OHMS high-power thick film chip resistors. Popular models including CRH2512F249RE04Z are stocked, making it well-suited for prototype and small-batch purchasing.
⚠️ Selection tip: If your ambient temperature常年 exceeds 85℃, strengthen thermal design with larger PCB pad copper area and bottom thermal vias, or step up to a 3W grade to secure adequate power margin.