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RC-02K4990FT是风华FH品牌推出的0402封装厚膜贴片电阻,以精准阻值控制、宽温适应性及高性价比为核心优势,广泛应用于消费电子、工业控制、汽车电子等领域。以下从产品属性、核心参数、特性及应用等方面展开详细介绍:
RC-02K4990FT属于厚膜贴片电阻范畴,型号命名逻辑清晰:
该产品定位为通用型小型化电阻,兼顾成本与性能,适合对阻值精度、功率要求中等,同时需高密度PCB布局的场景。
电气参数是电路设计的关键依据,RC-02K4990FT的核心参数如下:
阻值为499Ω,精度等级**±1%**,实际阻值范围在494.01Ω~503.99Ω之间。此精度可满足多数信号调理、分压、限流电路的一致性需求,无需额外校准即可保证电路性能稳定(如音频前置放大的偏置电阻、传感器信号的分压采样)。
温度系数为**±100ppm/℃**,表示温度每变化1℃,阻值变化±100×10⁻⁶。以25℃为基准,温度升至125℃(变化100℃)时,阻值漂移约±0.05Ω,宽温稳定性满足工业/车载高温场景需求。
采用0402英制封装(公制1005,尺寸1.0mm×0.5mm),是小型化贴片电阻的主流选择,优势在于:
通过丝网印刷电阻浆料+高温烧结工艺制造,相比薄膜电阻:
RC-02K4990FT的环境适应性满足工业级及部分车载级要求:
结合参数与特性,RC-02K4990FT的主要应用场景包括:
RC-02K4990FT由风华FH(风华高科) 生产,风华高科是国内领先电子元器件制造商,厚膜电阻产能位居行业前列,产品通过ISO 9001、ISO/TS 16949(汽车电子)认证,批量一致性好,满足客户量产需求。
综上,RC-02K4990FT厚膜贴片电阻以小型化、高精度、宽温稳定及高性价比,成为电子设计中替代插件电阻的理想选择,可有效提升电路集成度与可靠性。
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Product sourcing intelligence
WMSIC turns product data, package visuals, BOM context, and sourcing signals into practical RFQ notes for buyers.
Model text, package form, tray or reel details, and visual evidence are reviewed together before RFQ feedback.
BOM lines are compared by package, parameters, quantity, and workable alternatives for cleaner sourcing decisions.
Stock routes, quotation confidence, lead-time notes, and shipment feasibility are checked before sales follow-up.
Buyer sourcing scenarios
Typical RFQ scenarios based on the WMSIC form fields, catalog data, manual review steps, and shipment preparation workflow.
The buyer shares the full part number, package requirement, quantity, destination, and available product photos so the quotation can record the exact version under review.
A multi-line BOM is organized into direct sourcing lines, lines that need package clarification, and lines where alternative-part review is permitted.
The original manufacturer part number, datasheet revision, application, critical limits, and acceptable changes are collected before possible candidates are discussed.
Sample quantity, minimum packing, package format, target date, and courier destination are kept together in one RFQ conversation.
Package photos, model markings, board context, and the quantity needed for repair help focus the sourcing review on the relevant version.
When a suffix or package note is incomplete, the response records the open difference and requests buyer confirmation before procurement proceeds.
Packing format, carton notes, invoice details, courier option, destination, and tracking handoff are coordinated around the confirmed order.
The request connects the previously used model, current demand, package evidence, target timing, and replenishment sourcing route.
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