Technical Analysis and Application Guide of CRH2512F402RE04Z 2512 402R 2W Ever Ohms High-Power Thick-Film Chip Resistor
The CRH2512F402RE04Z is a representative model from Ever Ohms Tech's CRH series of high-power thick-film chip resistors. Featuring a 2512 imperial package size, this device delivers a nominal resistance of 402Ω with ±1% tolerance, a rated power of 2W, and a temperature coefficient of ±100ppm/℃. With a maximum working voltage of 200V and an operating temperature range from -55℃ to +155℃, the CRH2512F402RE04Z serves critical functions including current limiting, voltage division, and load matching in power ma
Technical Analysis and Application Guide of CRH2512F402RE04Z 2512 402R 2W Ever Ohms High-Power Thick-Film Chip Resistor
Product Overview
The CRH2512F402RE04Z is a representative model from Ever Ohms Tech's CRH series of high-power thick-film chip resistors. Featuring a 2512 imperial package size, this device delivers a nominal resistance of 402Ω with ±1% tolerance, a rated power of 2W, and a temperature coefficient of ±100ppm/℃. With a maximum working voltage of 200V and an operating temperature range from -55℃ to +155℃, the CRH2512F402RE04Z serves critical functions including current limiting, voltage division, and load matching in power management, industrial control, and communication equipment.
Part Number Decoding
Ever Ohms employs a structured part numbering system. For CRH2512F402RE04Z:
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CRH: High-power thick-film chip resistor series
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2512: Imperial package size, equivalent to metric 6432 (approximately 6.35mm × 3.2mm)
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F: Resistance tolerance of ±1%
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402R: Nominal resistance of 402Ω, where R denotes the decimal point
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E04: Power rating of 2W
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Z: Tape and reel packaging, standard quantity of 4000 pieces per reel
Understanding this coding scheme enables engineers to quickly identify parameter-compatible alternatives during BOM consolidation and cross-referencing.
Key Technical Specifications
表格
| Parameter | Value |
|---|---|
| Package Size | 2512 (6.35mm × 3.2mm) |
| Nominal Resistance | 402Ω |
| Resistance Tolerance | ±1% |
| Rated Power | 2W (@70℃) |
| Temperature Coefficient | ±100ppm/℃ |
| Maximum Working Voltage | 200V |
| Operating Temperature | -55℃ to +155℃ |
| Resistor Type | Thick-film |
| Packaging | Tape and reel, 4000 pcs/reel |
The 2512 package ranks among the larger form factors in the chip resistor family. Compared to 1206 or 0805 devices, its expanded heat dissipation area supports higher power loads. The 2W rating makes the CRH2512F402RE04Z suitable for medium-power circuits, while the ±1% precision addresses applications demanding stable resistance values.
Product Features and Process Advantages
The CRH2512F402RE04Z utilizes a high-purity alumina ceramic substrate. The resistive element is formed from a blend of metal and glass powders, screen-printed and sintered into a robust thick-film structure. This manufacturing approach yields several distinct benefits:
Superior Thermal Performance. The large-area solder pads of the 2512 package, combined with the ceramic substrate's high thermal conductivity, keep temperature rise within acceptable limits even under full power load. Designers should consult the derating curve and reduce operating power when ambient temperatures exceed 70℃ to maximize device lifespan.
High Resistance Stability. A temperature coefficient of ±100ppm/℃ ensures that the 402Ω nominal value drifts minimally across the full temperature span. For equipment requiring long-term parameter consistency, this specification directly impacts overall system reliability.
Broad Soldering Compatibility. The device supports both reflow and wave soldering processes. The terminal electrodes employ a tri-layer construction (silver/nickel/tin) with excellent solderability, fully compliant with RoHS environmental directives.
Adequate Mechanical Robustness. Thick-film chip resistors withstand standard reliability tests including PCB depaneling, vibration, and drop tests, making them well-suited for high-volume automated assembly lines.
Typical Application Scenarios
Leveraging the power rating and precision of the 2512 402R 2W resistor, the CRH2512F402RE04Z finds extensive use in the following fields:
Switching Power Supplies and Adapters. In AC-DC or DC-DC conversion circuits, the 402Ω value frequently appears in feedback networks, soft-start circuits, and overcurrent detection loops. The 2W power margin absorbs inrush currents during startup.
Industrial Inverters and Servo Drives. Industrial control equipment demands components capable of withstanding harsh thermal conditions. The -55℃ to +155℃ operating range enables stable performance inside high-temperature control cabinets or outdoor inverter installations.
LED Drivers and Lighting Power Supplies. In constant-current drive circuits, the CRH2512F402RE04Z functions as a current-sense or current-limiting resistor. The ±1% tolerance helps maintain uniform current through LED strings, preventing luminance imbalance.
Telecommunication Base Stations and Network Equipment. Communication power modules require high power-density passive components. The 2512 package delivers 2W capacity while occupying relatively compact board space, supporting equipment miniaturization.
New Energy Vehicle Electronics. On-board chargers (OBC), DC-DC converters, and battery management systems (BMS) incorporate pre-charge and discharge circuits that demand high-power resistors tolerant of elevated temperatures. The CRH series has established proven deployment records in these automotive applications.
Selection and Procurement Recommendations
When specifying the CRH2512F402RE04Z, engineers should evaluate actual power dissipation, thermal conditions, and voltage stress comprehensively. A minimum 20% power derating margin is advisable, and PCB pad dimensions should conform to manufacturer recommendations to optimize heat conduction paths.
For volume procurement and long-term supply assurance, selecting authorized distributors with direct factory relationships is critical. Shenzhen Shunhai Technology Co., Ltd. serves as a core channel partner for Ever Ohms resistors, offering technical support and inventory availability across the full CRH series, with supply chain coverage spanning from sample requests to volume deliveries. HuaNian Mall operates as an online electronic components procurement platform, providing real-time stock inquiries, one-click BOM matching, and small-batch rapid shipping for the CRH2512F402RE04Z, making it particularly suitable for flexible purchasing during R&D and pilot production phases.
Both channels guarantee genuine products with complete technical documentation. Buyers may select the appropriate supply route based on project scale and delivery schedule requirements.
Conclusion
The CRH2512F402RE04Z 2512 402R 2W Ever Ohms resistor, built on mature thick-film technology with wide-temperature capability and 2W power handling, has become a standard passive component in industrial electronics and power supply design. Accurate parameter interpretation, proper thermal assessment, and procurement through authorized distribution channels form the foundation for ensuring long-term circuit reliability.