Technical Analysis of CRH2512F24K0E04Z 2512 24K 2W Ever Ohms High-Power Thick-Film Chip Resistor

1. Part Number Breakdown

CRH2512F24K0E04Z is a standard part number in the CRH series of high-power thick-film chip resistors from Ever Ohms Technology. Each segment of the code carries a specific specification definition.

• CRH: Product family code, representing Thick Film High Power Chip Resistor. This series differs from Ever Ohms' conventional CR series and precision TR series, and is specifically designed for applications with higher power density.

• 2512: Imperial package size, corresponding to metric 6432, with dimensions of 6.30 mm × 3.20 mm × 0.55 mm. The 2512 package belongs to the medium-to-high power class among chip resistors, offering ample heat dissipation area that provides the physical foundation for a 2 W power rating.

• F: Resistance tolerance code, indicating ±1%. In industrial control and power supply circuits, ±1% tolerance is sufficient for most voltage divider, current limiting, and feedback network design requirements.

• 24K0: Nominal resistance of 24 kΩ (24,000 Ω), falling within the medium-to-high resistance range, suitable for signal conditioning, bias circuits, and high-impedance voltage divider applications.

• E: Packaging format is embossed tape, compatible with standard SMT pick-and-place machines.

• 04: 4,000 pieces per reel, meeting volume production needs.

• Z: Default standard code, corresponding to conventional thick-film process.

In summary, the core identity of this part is a 2512 24K 2W resistor with ±1% tolerance and a temperature coefficient of ±100 ppm/℃.

2. Key Electrical Parameters

The 2 W rated power is the most prominent parameter of this device. It can operate at full load at an ambient temperature of 70 °C; beyond 70 °C, linear derating is required according to the derating curve, reaching zero at 155 °C. For a 24 kΩ resistance, the formula E = √(P × R) yields a rated continuous working voltage of approximately 219 V, well below the 400 V maximum working voltage limit. Therefore, in typical applications, power dissipation is the primary constraint rather than voltage withstand.
The ±100 ppm/℃ TCR represents a good level among thick-film processes, meaning that across the full temperature range of −55 °C to +155 °C, the maximum resistance drift is approximately ±2.1%. Combined with the ±1% initial tolerance, the total error across the full temperature range can be controlled within reasonable limits, meeting the stability requirements of industrial-grade circuits.

3. Construction and Process Features

The CRH series employs an alumina ceramic substrate. The back electrode and front resistor layer are formed by screen-printing thick-film paste, followed by high-temperature sintering to create a stable resistor body, with an outer glass protective layer. The end terminals adopt a three-layer structure (inner electrode, nickel barrier, and tin plating), offering good solderability and anti-leaching capability—after 30 seconds of solder immersion at 260 °C, the leaching area on a single end face does not exceed 5%.
Compared with ordinary 2512 thick-film resistors (commonly rated at 1 W), the CRH2512 boosts power to 2 W through optimized resistor film formulation and heat dissipation pathways, achieving double the power handling capacity within the same footprint. This is particularly critical for designs that are space-constrained yet need to handle significant power dissipation.

4. Product Advantages

1. High Power Density: Achieves a 2 W rated power within the standard 2512 package, offering superior power density to conventional thick-film resistors and effectively reducing PCB area.

2. Good Temperature Stability: The ±100 ppm/℃ temperature coefficient, combined with a wide operating temperature range of −55 °C to +155 °C, ensures resistance consistency in harsh environments.

3. High Reliability: Passes MIL-STD-202 and IEC 60115 related tests, including thermal shock, resistance to soldering heat, and life testing, meeting industrial-grade application standards.

4. Strong Compatibility: Supports both reflow and wave soldering, complies with RoHS lead-free process requirements, and facilitates automated production.

5. Outstanding Cost Performance: Compared with imported brands of the same specification, the Ever Ohms 2512 24K 2W resistor maintains comparable electrical performance while offering shorter lead times and more competitive pricing.

5. Typical Application Scenarios

• Switching Power Supplies: Used in feedback voltage divider networks, soft-start circuits, and surge absorption loops; the 24 kΩ resistance combined with 2 W power rating can withstand relatively high pulse energy.

• Industrial Inverters: Employed as gate resistors or bleeder resistors in drive circuits, leveraging its high-power characteristic to reduce temperature rise.

• LED Drivers: Used for current sensing and current limiting protection; the ±1% tolerance helps maintain constant-current accuracy.

• Automotive Electronics: Suitable for non-safety auxiliary circuits such as onboard chargers and DC-DC converter bias networks.

• Telecom Equipment: Used as pull-up/pull-down resistors or filter network elements in base station power modules and network devices.

6. Recommended Procurement Channels

For purchasing the CRH2512F24K0E04Z 2512 24K 2W Ever Ohms resistor, it is recommended to source genuine products and technical support through authorized distributors. The following channels are available for reference:
Shenzhen Shunhai Technology Co., Ltd. — Authorized distributor of Ever Ohms resistors, maintaining full CRH series inventory. They provide sample support and volume quotations with short lead times and prompt technical response.
Hua Nian Mall — A professional electronic component spot trading platform with a comprehensive range of Ever Ohms resistor models. It supports online inventory and price queries, offering convenient ordering suitable for small-to-medium volume procurement and urgent replenishment needs.