HoCG2728 Automotive Grade Molded Alloy Resistor

I. Core Product Positioning

The HoCG2728 is a major upgraded high-power automotive-grade molded alloy resistor from Shenzhen Milliohm Electronics. Backed by industry-leading electron beam welding processes and high-thermal-conductivity molding technology, it features four core characteristics: ultra-high current-carrying capability, ultra-high stability, ultra-low temperature drift, and low inductance at high frequency. As a 2728 large-package precision current sensing resistor, the product breaks through the power limitations of conventional SMD resistors, covering 4 W and 5 W high-power ratings. It is suited to demanding high-end working conditions in new energy, automotive electronics, industrial control, and aerospace and defense applications, making it a preferred domestic replacement device for high-current sensing, power current limiting, and circuit safety protection.

The entire series is certified to AEC-Q200 automotive-grade standards and RoHS/REACH halogen-free environmental certifications, and is manufactured under the authoritative IATF 16949 and ISO 9001 quality systems. It thoroughly resolves industry pain points associated with conventional resistors—such as burnout under overload, high temperature drift, sensing distortion, high-frequency interference, and poor soldering reliability—while balancing mass-production cost-performance with the stability requirements of high-end equipment.

II. Six Core Product Advantages

1. Industry-Advanced Processes, Maximum Reliability
Among the first in China to adopt a high-thermal-conductivity epoxy resin molding process combined with electron beam welding—distinct from conventional spot-welding structures. The result is uniform, robust solder joints with highly consistent internal resistance, eliminating virtual soldering, joint detachment, and cracking. The multilayer composite structure (tin layer + nickel layer + copper layer + alloy body + molding layer) offers exceptional protection against moisture, dust, and corrosion, suiting long-term operation under complex working conditions.

2. Ultra-High Power and High Current-Carrying Capability, Performance Beyond Class
In the 2728 large package, it supports dual power ratings of 4 W and 5 W. The 0 Ω through-type version achieves a maximum rated current of up to 250 A, while milliohm-level resistances withstand continuous currents in the hundreds of amperes and short-time overload surges of 223.6 A. Its overload capability far exceeds that of comparable products in the same size, ideally suiting battery high-current sensing, high-power supplies, and variable-frequency drives.

3. Ultra-Low Temperature Coefficient, Accurate and Stable Sensing
With precise temperature control across the entire series, temperature drift is as low as ±25 ppm/°C in the 4 mΩ to 100 mΩ range and ±50 ppm/°C in the 0.5 mΩ to 3 mΩ range, with minimal resistance drift across the full temperature range (−55°C to +170°C). This thoroughly eliminates resistance shift under high temperatures and high-low temperature cycling, ensuring accurate, error-free current sensing and voltage monitoring data.

4. Ultra-Low Parasitic Inductance, Suited to High-Frequency Applications
With parasitic inductance of less than 3 nH and excellent high-frequency characteristics, the product effectively suppresses waveform distortion and signal interference in high-frequency circuits. It is ideally suited to high-frequency AC current sensing, servo drives, variable-frequency control systems, and other high-frequency equipment, ensuring high-speed, stable circuit operation.

5. Automotive-Grade Rigorous Quality, Full Working Condition Compatibility
Certified to the full AEC-Q200 automotive-grade reliability test suite, it withstands thousands of temperature cycles, thousands of hours of high-temperature/high-humidity exposure, and long-term full-load operation. Performance shows no degradation under vibration, rapid temperature swings, or high-power surges, meeting the stringent quality requirements of automotive, aerospace and defense, and high-end industrial equipment.

6. Eco-Friendly, Precision Mass Production, Suited to Automated Manufacturing
Utilizing eco-friendly laser marking, the markings are clear, wear-resistant, and free of hazardous substances, complying with RoHS, halogen-free, and REACH global environmental standards. The product offers extremely high consistency with controllable tolerance, and standardized taping (1,000 pcs/reel) compatible with fully automated pick-and-place reflow and wave soldering processes, significantly reducing mass-production defect rates and costs.

III. Precise Adaptation Across Full-Scenario Industries

Leveraging its comprehensive performance advantages—high power, low drift, high reliability, and low inductance at high frequency—the HoCG2728 fully covers core sectors including high-end industrial, automotive electronics, new energy, and aerospace and defense. It is a core supporting component for high-current sensing and power protection:

• Automotive Electronics: On-board BMS battery management systems, automotive power modules, body control modules, and on-board variable-frequency drive equipment. Automotive-grade certification adapts to complex on-board working conditions involving vibration and high/low temperatures, precisely sensing battery charge/discharge current to ensure safe and stable on-board circuit operation.

• Industrial Automation: Servo drive systems, variable-frequency controllers, industrial precision instruments, and automation control modules. Low temperature drift and high precision ensure accurate long-term operating parameters for industrial equipment, eliminating equipment failures caused by sensing errors.

• New Energy Power: High-power power modules, charging stations, energy storage equipment, and photovoltaic/wind power control systems. Ultra-high current-carrying capability adapts to high-current charge/discharge conditions in new energy applications, with overload resistance and temperature rise tolerance suiting high-frequency start-stop working scenarios.

• Aerospace and Defense: Military power supplies, aerospace precision controllers, and high-end measurement and control equipment. Ultra-wide temperature range, high stability, and high reliability meet stringent military quality standards.

• Battery Equipment: Battery formation and grading cabinets and battery testing equipment. Precise low-resistance sensing adapts to high-precision battery testing and grading requirements, improving battery production precision and quality.

IV. Solid Brand Strength, Worry-Free Quality and Delivery

The HoCG2728 series is independently developed and manufactured by Shenzhen Milliohm Electronics Co., Ltd. Founded in 2009, the company is a national-level high-tech enterprise and a "specialized, refined, distinctive, and innovative" (SRDI) enterprise, with over a decade of deep engagement in precision alloy resistors. It operates four manufacturing bases in Anhui, Foshan, Zhongshan, and Danyang, along with eight sales offices, a 30,000 m² standardized production facility, and a professional team of over 400 employees, including more than 50 R&D engineers. The company offers integrated capabilities spanning R&D, tooling development, production, testing, and after-sales service.

The company holds a full set of qualifications, having obtained authoritative system certifications including ISO 9001 quality management, IATF 16949 automotive industry, ISO 14001 environmental, and ISO 45001 occupational health and safety. Its products carry full-chain compliance certifications such as AEC-Q200 automotive-grade, State Grid, CE, RoHS, and REACH. With strong production capacity, it achieves monthly output of 400–450 KK for chip resistors, 150 KK for through-hole resistors, and 10–12 KK for shunts, fully meeting stable delivery requirements for large-volume orders.

The company also has a professional FAE technical service team, providing one-on-one selection guidance, solution adaptation, technical consultation, and after-sales support across the entire process, responding quickly to customers' R&D, mass-production, and iteration needs.

V. Core Cooperation Advantages

• High-End Domestic Replacement: Performance benchmarks against imported high-end alloy resistors, with parameters, stability, and reliability fully on par, significantly reducing customers' procurement costs—free from import premiums and unstable lead times.

• Stringent Quality Control Assurance: Fully automated production and 100% inspection before shipment, delivering high product consistency, minimal resistance drift, and extremely low defect rates, reducing customers' after-sales risks at the source.

• Flexible Customization Services: Supports personalized customization of resistance, power rating, tolerance, electrode structure, and packaging to suit customers' special circuit designs and mass-production requirements.

• Stable Delivery System: Multi-factory coordinated production with ample inventory and capacity, eliminating supply interruptions and delays to ensure a stable mass-production rhythm for customers.