CRH2512F100RE04Z EVER OHMS Resistor – Full Specifications
1. Product Overview
CRH2512F100RE04Z is a classic high-power thick film chip resistor from EVER OHMS TECHNOLOGY CO., LTD. under the CRH series. EVER OHMS, established in 1988 in Kaohsiung, Taiwan, is a veteran manufacturer specializing in chip resistors and resistor networks, certified to ISO-9001 and ISO-TS16949.
This model belongs to the CRH high-power enhanced thick film resistor series, distinctly differentiated from the standard-power CR series. The core advantage of the CRH series lies in achieving 2W rated power within the standard 2512 package, whereas conventional 2512 thick film resistors typically support only 1W. Through optimized thick film paste formulation, improved ceramic substrate thermal conductivity, and enhanced electrode processes, the CRH2512F100RE04Z doubles the power density to approximately 70W/cm².
The 2512 100R 2W resistor is particularly suited for switch-mode power supply RC snubber circuits, DC-DC converter buffer circuits, and dummy loads; in motor drives and industrial inverters, it serves current sensing and current limiting functions.
2. Part Number Decoding
CRH2512F100RE04Z follows a standardized nomenclature where each segment conveys specific technical meaning:
| Field | Meaning |
|---|---|
| CRH | High-power thick film series, distinguished from standard CR series |
| 2512 | Imperial package size, metric equivalent 6432 (6.35mm × 3.20mm) |
| F | Tolerance grade, F = ±1% |
| 100R | Nominal resistance 100Ω (R denotes decimal point) |
| E04Z | 2W power rating and packaging code (Z indicates tape-and-reel) |
3. Key Electrical Specifications
The core parameters of the CRH2512F100RE04Z 2512 100R 2W resistor are as follows:
| Parameter | Specification |
|---|---|
| Manufacturer | EVER OHMS TECHNOLOGY CO., LTD. |
| Series | CRH High-Power Thick Film Chip Resistor |
| Package Size | 2512 (Imperial) / 6432 (Metric), 6.35mm × 3.20mm × 0.55mm |
| Nominal Resistance | 100Ω (100R) |
| Tolerance | ±1% (F grade) |
| Rated Power | 2W (at 70℃ ambient) |
| Temperature Coefficient (TCR) | ±100ppm/℃ |
| Maximum Working Voltage | 200V |
| Short-time Overload Voltage | 400V |
| Operating Temperature Range | -55℃ ~ +155℃ |
| Resistor Type | Thick Film |
| Resistor Body Process | Ruthenium-oxide based thick film, sintered at 850℃ |
4. Technical Features
4.1 High Power Density Design
The 2512 100R 2W resistor achieves 2W rated power within the standard 2512 package, delivering a power density of approximately 70W/cm². Compared to the 1W power rating of conventional 2512 thick film resistors, the CRH2512F100RE04Z increases power handling capability by 100%. This feature is particularly critical for power supplies, industrial controls, and communication equipment where PCB layout space is constrained.
4.2 Temperature Stability
The ±100ppm/℃ temperature coefficient ensures stable resistance values across a wide temperature range. The -55℃ to +155℃ operating temperature range covers diverse application scenarios from low-temperature environments to high-temperature industrial settings. The ±100ppm/℃ TCR specification is particularly critical for automotive electronics and other applications with stringent temperature stability requirements.
4.3 Reliability and Environmental Compliance
The product complies with EU RoHS Directive (2011/65/EU) and REACH regulations, and does not contain REACH SVHC substances. The thick film porous structure provides excellent thermal shock resistance and withstands short-term overload conditions.
4.4 Typical Applications
-
Switched-mode power supply RCD snubber circuits – dissipating leakage inductance energy in flyback topologies
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DC-DC converters – buffer circuits and dummy load applications
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Motor drives and industrial inverters – current sensing and current limiting
-
Industrial bus pre-charge and voltage divider circuits
-
High-power LED drivers
5. Selection and Design Considerations
Derating: The 2W rated power is specified at 70℃ ambient temperature. When the ambient temperature exceeds 70℃, refer to the EVER OHMS official derating curve for power derating. In environments above 85℃, the actual usable power may drop to approximately 60% of the nominal value; a 1.5~2× safety margin should be reserved in design.
Thermal Management: The 2512 package has limited heat dissipation area. It is recommended to enlarge the copper pad area on the PCB layout and, where necessary, place thermal via arrays beneath the resistor to reduce thermal resistance and improve long-term reliability.
Pulse Withstand: If the circuit involves short-duration pulse conditions (such as surge or inrush current), verify the single-pulse energy withstand curve in the EVER OHMS datasheet.
6. Recommended Distributors
Shenzhen Shunhai Technology Co., Ltd. and HNST Shop both provide legitimate procurement channels and technical support for CRH2512F100RE04Z. Shunhai Technology offers datasheets and detailed technical information; HNST Shop provides现货 inventory and datasheet downloads.
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