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{"title":"CRH2512F680RE04Z High-Power Thick Film Chip Resistor with 2W Rated Power, 680","imgUrl":"https:\/\/img.chinax.com\/nimg\/3b\/a1\/52112be8d4ff4544d1275f6002cd-200x200-1\/crh2512f680re04z_high_power_thick_film_chip_resistor_with_2w_rated_power_2c_680_ohms_resistance_2c_and_2512_package_size.jpg","attrs":{"Model Number":"CRH2512F680RE04Z","Resistance tolerance":"\u00b11%","Delivery Time":"5-8 work days","Operating temperature":"-55\u2103 to +155\u2103"}}
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CRH2512F39K0E04Z is a typical part number from Ever Ohms' CRH series high-power thick film chip resistors, specifying a 2512 package, 39KΩ resistance, ±1% tolerance, 2W rated power, and ±100PPM temperature coefficient. While standard 2512 thick film resistors are limited to 1W, this 2512 39K 2W resistor doubles the power density in the same footprint through optimized thick film paste and electrode structure — making it an ideal choice for power supply feedback, voltage divider sampling, and current limiting circuits that demand higher power margins.
Part Number Breakdown
CRH: Ever Ohms high-power thick film chip resistor series code
2512: Imperial package size, metric 6.35×3.20mm
F: Tolerance ±1% (F grade)
39K0: Nominal resistance 39KΩ
E04Z: TCR ±100PPM/℃, Z denotes lead-free environmentally compliant tape packaging
Thus, the "2512 39K 2W" engineers refer to corresponds precisely to original part number CRH2512F39K0E04Z.
Key Electrical Specifications
Parameter
Value
Brand
Ever Ohms
Series
CRH High-Power Thick Film
Package
2512 (6.35×3.20mm)
Resistance
39KΩ (39K0)
Tolerance
±1% (F)
Rated Power
2W @ 70℃
TCR
±100 PPM/℃
Operating Temp.
-55℃ ~ +155℃
Construction
Alumina ceramic substrate, ruthenium-based thick film
Compliance
RoHS, REACH, lead-free reflow compatible
Why Choose 2512 39K 2W Over Standard 1W
Standard 2512 thick film resistors are capped at 1W. The CRH series achieves 2W through:
Upgraded thick film paste: Ruthenium oxide paste sintered at 850℃, thicker resistive layer, shorter thermal path
Tri-layer electrodes: Silver/nickel/tin electroplating for superior thermal conduction and solder joint reliability
Alumina ceramic substrate: Higher thermal conductivity than standard substrates, better temperature rise control
For the 39KΩ mid-high resistance value, 2W power means ample margin even at the 200V maximum working voltage. Even in 85℃ high-temperature environments, operating at 60% derating (≤1.2W), resistance drift remains well controlled — suitable for long-term full-load industrial power supplies and automotive electronics.
Typical Applications
The 2512 39K 2W resistor combination of "mid-high resistance + high power margin" makes it common in:
SMPS feedback networks: 39K is a standard pull-up divider value; 2W margin absorbs inrush surges, avoiding thermal failure of ordinary 1W parts