CRH2512F20R0E04Z Ever Ohms High Power Thick Film Chip Resistor – Professional Introduction
I. Series Introduction
CRH2512F20R0E04Z belongs to Ever Ohms’ (TA-I Technology) CRH series of high-power thick film chip resistors. The CRH series is a core product line developed by Ever Ohms for high-power-density applications, covering eight package sizes from 0402 to 2512, with a power range from 0.1W to 2W and a resistance range from 10mΩ to 10MΩ.
The core positioning of the CRH series is “higher power in the same package” – achieving a significant power rating increase within standard chip resistor package dimensions. For the 2512 package, standard thick film resistors typically offer 1W power rating, while the CRH series achieves 2W in the same package size – a 100% increase in power handling capability.
The CRH series employs 96% high-thermal-conductivity alumina ceramic substrates with ruthenium-based thick film resistor paste through high-temperature sintering, and features a silver/nickel/tin三层 electrode structure. Products are certified to ISO9001, IATF 16949, and AEC-Q200 automotive standards.
II. Model Number Decoding
The model number CRH2512F20R0E04Z follows Ever Ohms’ standardized naming convention:
| Code Segment | Meaning | Description |
|---|---|---|
| CRH | Series Code | High Power Thick Film Series |
| 2512 | Package Size | Imperial 2512, Metric 6432 (6.35mm × 3.18mm) |
| F | Tolerance | ±1% (F-grade precision) |
| 20R0 | Resistance | 20Ω (letter “R” serves as decimal point) |
| E04Z | Suffix Code | Internal factory specification code for TCR and packaging |
Key Model Number Notes:
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CRH vs CR: CRH is the high-power series, distinct from Ever Ohms’ standard-power CR series. The CRH series doubles the power rating in the same package.
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F vs J: F denotes ±1% tolerance, J denotes ±5% tolerance. The same series also includes CRH2512J20R0E04Z (±5% version), identical in all other specifications.
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20R0: The trailing “0” is a multiplier indicator, with “R” representing the decimal point – 20R0 equals 20.0Ω.
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E04Z: E04 corresponds to 7-inch reel taping packaging, with 4,000 pieces per reel as standard; Z indicates RoHS compliance, lead-free and halogen-free.
III. Key Parameters
Key electrical and physical parameters of the CRH2512F20R0E04Z 2512 20R 2W resistor are as follows:
| Parameter | Specification |
|---|---|
| Manufacturer | Ever Ohms (TA-I Technology) |
| Product Series | CRH High Power Thick Film Chip Resistor |
| Package Size | 2512 (Imperial) / 6432 (Metric), 6.35mm × 3.18mm × 0.55mm |
| Nominal Resistance | 20Ω (20R) |
| Tolerance | ±1% (F-grade) |
| Rated Power | 2W (@70℃ ambient) |
| TCR | ±100ppm/℃ |
| Operating Temperature | -55℃ ~ +155℃ |
| Rated Voltage | 200V DC |
| Maximum Overload Voltage | 400V |
| Insulation Resistance | ≥10GΩ |
| Resistor Technology | Thick film, ruthenium-based paste + 96% alumina ceramic substrate |
| Terminal Material | Three-layer plating (Ni barrier + pure Sn top coat) |
| Minimum Packing Quantity | 4,000 pieces/reel (7-inch reel taping) |
| RoHS Compliance | Compliant with 2011/65/EU |
| REACH Compliance | Does not contain REACH SVHC (1907/2006/EC) |
| Automotive Certification | IATF 16949 and AEC-Q200 certified |
Key Parameter Notes:
The 2512 20R 2W resistor can continuously carry approximately 316mA of operating current at 20Ω. The ±100ppm/℃ TCR is an excellent level for thick film technology, with controllable resistance drift across the -55℃ to +155℃ temperature range. The 200V voltage rating covers most medium and low-voltage power electronics applications. Note that when the ambient temperature exceeds 70℃, the rated power must be derated according to the derating curve.
Recommended similar products:
| Part Number | Parameter |
| CRH2512F200KE04Z | 2512 200K 2W 1% |
| CRH2512F200RE04Z | 2512 200R 2W 1% |
| CRH2512F20K0E04Z | 2512 20K 2W 1% |
| CRH2512F20R0E04Z | 2512 20R 2W 1% |
| CRH2512F220KE04Z | 2512 200K 2W 1% |
| CRH2512F220RE04Z | 2512 220R 2W 1% |
| CRH2512F22K0E04Z | 2512 22K 2W 1% |
| CRH2512F22R0E04Z | 2512 22R 2W 1% |
| CRH2512F249RE04Z | 2512 249R 2W 1% |
IV. Product Advantages
1. Doubled Power Density, Maximized Space Efficiency
The core technical advantage of the 2512 20R 2W resistor lies in its breakthrough in power density. Standard 2512 package thick film resistors typically offer 1W power rating, while the CRH2512F20R0E04Z achieves 2W in the identical package size through optimized ceramic substrate thermal paths, improved ruthenium-based resistor paste formulation, and enhanced electrode heat dissipation structures. This means design engineers can obtain double the power margin without increasing PCB footprint – particularly suitable for space-constrained yet power-demanding applications. A single component can replace two parallel 1W resistors, simplifying PCB layout and reducing BOM complexity.
2. Low TCR Ensures Resistance Stability
The TCR is controlled at ±100ppm/℃, significantly better than the ±200~400ppm/℃ typical of ordinary thick film resistors. Under long-term full-load operation in industrial power supplies, automotive electronics, and other wide-temperature-range environments, the 2512 20R 2W resistor exhibits minimal resistance drift, effectively avoiding control loop deviations caused by thermal drift and improving overall system accuracy and reliability.
3. High Precision Reduces Debugging Costs
The ±1% tolerance makes CRH2512F20R0E04Z excel in precision voltage divider and current sensing circuits. Compared to ±5% tolerance conventional models, 1% resistors significantly reduce parameter tuning efforts during circuit debugging and lower performance variation in mass production – particularly suited for industrial control and measurement equipment requiring high consistency.
4. Anti-Sulfur Design for Harsh Environments
The CRH series employs high-density protective glaze and built-in anti-sulfur structures that block atmospheric sulfides from corroding the internal silver electrodes. This enables the 2512 20R 2W resistor to maintain long-term stability in sulfur-rich atmospheres such as outdoor communication base stations, highly polluted industrial environments, and automotive engine compartments, reducing the risk of resistance drift or open-circuit failure caused by electrode sulfidation.
5. Excellent Overload and Pulse Withstanding Capability
The series can withstand high transient voltage surges and surge currents, capable of handling 5ms pulse width at 100A peak current. The 2W power margin combined with the ceramic substrate’s superior thermal conductivity ensures that permanent resistance drift or burnout is unlikely under short-term overload conditions.
6. Cost-Effectiveness and Supply Assurance
Compared to international brands such as Vishay CRCWHP series and Yageo PE series in the same specification range, the Ever Ohms CRH2512F20R0E04Z offers clear cost advantages with comparable performance, along with shorter lead times and greater supply flexibility.
V. Applications
The CRH2512F20R0E04Z 2512 20R 2W resistor, with its combination of 20Ω resistance, 2W power rating, and 2512 standard package, finds wide application across multiple sectors:
1. New Energy Vehicles and BMS
In new energy vehicle battery management systems (BMS), the 2512 20R 2W resistor can be used for current sensing and power distribution in balancing circuits. Its 2W power capability and wide temperature range (-55℃~+155℃) meet the demanding requirements of automotive environments, with AEC-Q200 certification further ensuring reliability in automotive applications.
2. Industrial Control and Automation
In servo motor drive modules, the resistor serves as a current sensing component for overcurrent protection through precision voltage division. In variable frequency drive control circuits, the 20Ω resistance combined with ±1% tolerance ensures linearity of PWM modulation signals. PLC current sensing and voltage divider protection are also typical application scenarios.
3. Power Management and LED Drivers
In switching power supplies, AC/DC feedback voltage dividers, and LED driver current limiting circuits, the 2512 20R 2W resistor functions as a power distribution and current sampling component. Its 2W power capability makes it suitable for power supply pre-charge/discharge resistors and other power dissipation-demanding applications.
4. Communication Equipment
In communication base stations, network switches, and similar equipment, the resistor is used in power module regulation and current sensing circuits. The anti-sulfur design makes it particularly suitable for long-term operation in outdoor communication equipment.
5. Consumer Electronics and Home Appliances
In the power modules and control circuits of appliances such as air conditioners and refrigerators, CRH2512F20R0E04Z finds broad application. It is equally applicable in audio amplifiers, surveillance systems, computer motherboards, and other consumer electronics products.
Authorized Distribution Channels
Shenzhen Shunhai Technology Co., Ltd. is an official first-tier authorized distributor of Ever Ohms in mainland China, having represented Ever Ohms’ full product line since 2017. Shunhai Technology holds the 2026 distribution certificate issued by Ever Ohms, maintains substantial inventory of CRH2512F20R0E04Z, and is equipped with a professional technical support team (FAE) capable of providing circuit optimization, parameter calculation, and other in-depth services. Its client portfolio includes industry leaders such as BYD and Huawei.
Huanian Mall (www.hnstshop.com) is a professional online electronic component procurement platform offering convenient model number searches, integrating inventory data from multiple distributors for real-time price and lead time visibility. The platform provides comprehensive Ever Ohms series listings with clear tape/reel specifications, offering an efficient online procurement channel for small-batch purchases and engineering prototyping needs.
