What are the brands of metal foil resistors?

Metal foil resistors have become core components in precision measurement, aerospace, high-end audio, and other fields due to their excellent accuracy (± 0.001%), low temperature drift (usually ≤ 0.5ppm/℃), low noise, and long-term stability. The following analysis will be conducted from four dimensions: brand matrix, technological advantages, application scenarios, and selection strategies, to ensure that the density of the keyword "metal foil resistance" is reasonable and logically clear:
1、 International Top Brand Matrix
Vishay - Z-Coil Series
Technical advantages: Using nickel chromium alloy foil material, resistance traces are formed through photolithography process, supporting four terminal Kelvin connection, and the temperature coefficient is as low as ± 0.05ppm/℃.
Typical applications: quantum computing, high-precision power supply, satellite payload.
Caddock - USF Series
Technical advantages: Innovative film foil composite structure, with a power coefficient as low as 5ppm/W and a pulse load resistance of up to 10000 times.
Typical applications: Medical imaging equipment (such as MRI), particle accelerators.
Riedon - Precision foil resistors
Technical advantage: Provides a precision level of 0.005%, with a resistance range covering 1 Ω~10M Ω, certified by MIL-STD-202 military standard.
Typical applications: missile guidance systems, deep-sea exploration equipment.
KOA (Japan Xingya) - High precision foil resistor
Technical advantages: Combined with Japanese precision machining technology, resistance tolerance ± 0.01%, sulfur resistant design, and a lifespan of over 100000 hours.
Typical applications: semiconductor testing equipment, lithography machines.
2、 Domestic leading brand matrix
Fenghua High Tech (FH) - Precision foil resistor
Technical advantage: The only domestic manufacturer of 0.005% precision foil resistors in mass production, using independent intellectual property laser resistance adjustment technology with a temperature coefficient of ≤ 2ppm/℃.
Typical applications: Beidou navigation terminal, 5G base station calibration module.
Liaoning Zhongxu (ZX) - Metal foil resistor
Technical advantages: Focusing on industrial grade products, providing impact resistant and moisture-proof design, with a working temperature range of -55 ℃~155 ℃.
Typical applications: Petroleum exploration equipment, high-speed rail control systems.
Shenzhen Sunlord - High precision resistors
Technical advantages: Miniature foil resistor (0402 size) with an accuracy of ± 0.1%, suitable for portable instruments.
Typical applications: drone flight control, handheld spectrometer.
3、 Technical characteristics and key selection parameters
Accuracy level: ± 0.001% (ultra precision level), ± 0.01% (precision level), ± 0.1% (universal level).
Selection suggestion: Quantum computing can choose ± 0.001%, while industrial measurement can choose ± 0.01%~± 0.1%.
Temperature coefficient (TCR): ≤ 0.5ppm/℃ (top-level), ≤ 2ppm/℃ (high-end), ≤ 5ppm/℃ (economical).
Selection suggestion: Climate monitoring equipment should have TCR ≤ 1ppm/℃, and consumer electronics can choose ≤ 5ppm/℃.
Power rating: 0.1W~10W (common specifications).
Selection suggestion: Match the power according to the heat dissipation design, and it is recommended to reduce the rating for use (such as a 2W resistor with an actual load of ≤ 1.5W).
Packaging forms: Surface Mount (SMD), Plug in Package (DIP), Bare Die.
Selection suggestion: Choose SMD for automated production and DIP for high reliability scenarios.
4、 Application scenarios and brand adaptation
Research and Metrology
Requirement: Ultra low noise, ultra-low temperature coefficient.
Recommended brands: Vishay Z-Coil, Caddock USF (used in conjunction with a thermostatic bath).
EADS
Requirements: Anti radiation, wide temperature operation, lightweight.
Recommended brands: Riedon (certified by NASA), Fenghua High Tech (aerospace grade product).
medical equipment
Requirements: High precision, long-term stability, biocompatibility.
Recommended brands: KOA (sulfur resistant design), Liaoning Zhongxu (moisture-proof treatment).
Industrial Automation
Requirements: Impact resistance, vibration resistance, wide temperature range.
Recommended brands: Liaoning Zhongxu, Shenzhen Shunluo (industrial grade protection).
5、 Selection Strategy and Market Trends
Balance between accuracy and cost: The price of ultra precision resistors is more than 10 times that of economical ones, and selection should be based on measurement error budget.
Domestic substitution acceleration: Brands such as Fenghua High tech and Liaoning Zhongxu are gradually replacing imported products in the military and rail transit fields.
Customized services: Some manufacturers (such as Caddock) provide fully customized services for resistance, packaging, and temperature coefficient.
Supply chain security: It is recommended to choose a dual supplier strategy in key areas, such as the combination of Vishay and Fenghua High Tech.
From the above analysis, it can be seen that the selection of metal foil resistor brands requires comprehensive consideration of technical parameters, application scenarios, and supply chain stability. For example, in quantum computing experiments, Vishay Z-Coil resistors are preferred due to their 0.001% accuracy; In the new energy vehicle battery management system (BMS), Liaoning Zhongxu industrial grade foil resistors are widely used due to their impact resistance design. With the technological breakthroughs of domestic manufacturers, the future metal foil resistor market will present a competitive pattern of "international brands guarding the high-end, domestic brands competing for incremental growth".