Overview
The 6.8k resistor is a passive electronic component with a resistance value of 6,800 ohms. It is a staple in circuit design, offering reliable performance in both analog and digital applications. Resistors of this value are commonly available in through-hole and surface-mount (SMD) packages, catering to diverse assembly requirements. Manufacturers produce 6.8k resistors using materials like carbon film, metal film, or thick film, each offering distinct advantages in terms of cost, precision, and thermal stability. Their standardized values follow the EIA resistor color code (e.g., blue-gray-red-gold for 5% tolerance).
Structure and Working Principle
A 6.8k resistor consists of a resistive element—often a ceramic core coated with a conductive film—encased in a protective shell with axial leads or terminations. The resistive material's composition determines its performance characteristics, such as noise levels and temperature coefficients. Ohm's Law (V=IR) governs its operation: the resistor drops voltage proportional to the current passing through it. For example, a 6.8k resistor with 10mA current will exhibit a 68V drop. This property makes it invaluable for voltage division, pull-up/pull-down networks, and biasing transistors.
Key Features
6.8k resistors are prized for their balance of precision and affordability. Metal film variants typically offer 1% tolerance and low temperature coefficients (±50–100 ppm/°C), making them suitable for precision analog circuits. Carbon film resistors (5% tolerance) are cost-effective for general-purpose use. Power ratings range from 0.125W (SMD) to 5W (power resistors), with 0.25W and 0.5W being industry standards. Some models include flame-retardant coatings or conformal coatings for harsh environments. Automotive-grade resistors meet AEC-Q200 standards for vibration and thermal cycling resistance.
Application Areas
These resistors are ubiquitous in voltage dividers for sensor interfacing (e.g., thermistors, potentiometers) and ADC reference circuits. In digital electronics, they serve as pull-up resistors for I2C buses or GPIO pins, ensuring signal integrity. Industrial applications include motor control current sensing, PLC input/output modules, and power supply feedback loops. Consumer electronics like TVs and smartphones use them for LED current limiting or audio circuit impedance matching. DIY enthusiasts leverage 6.8k resistors in Arduino and Raspberry Pi projects.
Maintenance and Precautions
To ensure longevity, avoid operating resistors near their maximum power rating—derate by 50% in high-temperature environments. Overheating can cause value drift or open circuits. For SMD resistors, use reflow profiles matching the manufacturer's specifications to prevent tombstoning. Inspect for physical damage (cracks, discoloration) during PCB assembly. When replacing, match not only the resistance but also the power rating and tolerance. Storage in anti-static bags with humidity control (<60% RH) prevents oxidation of terminations.
B2B Procurement Guide
Bulk buyers should verify certifications like ISO 9001 and RoHS/REACH compliance. MOQs vary: standard values may start at 1,000 pieces, while custom values require 10k+ units. Lead times range from 2 weeks (stock items) to 8 weeks (custom specifications). Consider tape-and-reel packaging for automated assembly lines. Negotiate pricing tiers—for example, 10k units may cost $0.02/unit, dropping to $0.015/unit at 100k. Reliable distributors provide batch traceability and moisture sensitivity level (MSL) reports for SMD components.
Related Manufacturers
- 主营：劳保鞋、点塑手套、防尘口罩、abs安全帽、透气安全帽、一次性口罩、空气呼吸器、充气泵、气体检测仪、安全鞋、防化服、防毒面具
- 主营：wmsod-323、wcsod-123、a6sod-123、sksod-123、sesod-123、wxsod-123、wdsod-323、x4sod-123、6hsod-123、6csod-123、4zsod-123、mmbd4148t、mmbd4148a、3esod-323、蜡烛灯、wgsod-123、5psod-123、y2sod-323、稳压管、wnsod-123、d6sod-123、mmsz5244b、c0sod-323、5nsod-123、4fsod-123
- 主营：sy8133fcc、sy8083fcc、sy8823quc、panasonic、syt020abc、lt3092edd、sy8153fcc、ip101a-lf、ee-sx1140、m23636-15、转换器、sy8035dbc、tle4279g?、单片机、比较器、sy8163fcc、sy7066qmc、存储器、ps2701a-1、触发器、m031sd2ae、继电器、lmv651mfx、解码器、ps2805c-1
- 主营：圣邦微芯片、TI芯片、顺芯芯片、晶丰明源芯片、GD芯片、中科微芯片、微源芯片、普冉电子、上海贝岭
- 主营：ss310lsmb、npn封装、双排针、贴片pnp、红黑线、万能板、ss320smaf、稳压管、保护管、电池盒、丝印lyy、散热片、电阻带、锂电池、玻纤板、ss510lsmb、散热器、led灯具、扩展板、抑制管、接线片、放大器、定时器、6a10do-27、ss54lsmbf
- 主营：bzx84c3v0、bzx84c3v3、bzx84c3v6、bzx84c3v9、bzx84c6v8、bzx84c7v5、bzx84c6v2、bzx84c33v、bzx84c13v、bzx84c22v、bzx84c9v1、mmbt2222a、bzx84c16v、bzx84c27v、bzt52c24v、bzx84c36v、bzt52c36v、bzt52c39v、13003328d、bzt52c16v、bzx84c2v7、bzx84c15v、bzx84c24v、bzt52c27v、bzx84c39v
- 主营：中科微、镇流器、驱动器、继电器、处理器、控制器、欧司朗、hdr-15-24、adi运算、单片机、MCU、芯片、新唐、芯唐、MICROCHIP微芯、TI德州仪器、ADI 亚德诺、电源管理IC、驱动IC、LED、开关电源、LQFP
- 主营：隔离芯片、模拟芯片、驱动芯片、功率器件、氮化镓mosfet、碳化硅MOSFET、碳化硅模块、ipm模块、dsp处理器、MCU、传感器、电位器、隔离接口芯片、二极管、纳芯微
- 主营：芯片IC、ST单片机、BOM表配单、连接器、晶振、座子端子、电容电阻、三星国巨电容、二极管、ST单片机芯片
- 主营：高精密电阻、低温漂电阻、高精密低温漂电阻、高精密低温漂薄膜电阻、薄膜电阻、高精密薄膜电阻、低温漂薄膜电阻、千分之一电阻、0.1%电阻、25ppm电阻、10ppm电阻、高功率电阻、合金电阻、贴片排阻、陶瓷电容、共模电感
- 主营：二极管、dtc114tua、irlml0100、2sk3557-7、1ke1g3v3c、dtc143eka、krlml6401、krlml6402、2kk5008ds、2kk5006ds、2kk5007ds、ki2333cds、kmbt2907a、2kk5001ds、ki9926bdy、bar50-03i、bav103-hf、2sc3357-e、整流桥、电子管、2sa812-m6、三极管、esd5z5.0c、bc847a???、可控硅
- 主营：安全带、小推车、逃生装置、防护面屏、防爆充气箱、气体探测器、空气呼吸器、检测报警仪、报警控制器、空气压缩机、气体检测仪、多参数测定仪、分体式隔热服、可燃气体传感器
- 主营：贴片电容、电感、滤波器、车规电容、安规电容、磁环、磁珠、钽电容
- 主营：安全防护用品
- 主营：浸胶手套、耐高温手套、低温防护手套、防爆风机、丁腈磨砂手套、乳胶耐磨手套、PU防割手套、抗静电风管、绝缘手套、隔热手套、气体检测仪、安全带、防坠落制动器、防静电安全鞋、绝缘鞋、防护服、防护面罩、头盔、安全帽、防护眼罩、隔音耳罩、空气呼吸器、防护面屏、安全帽、防电弧服、防坠器