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Model text, package form, tray or reel details, and visual evidence are reviewed together before RFQ feedback.
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ERA2AEB201X是松下(PANASONIC) 推出的高精度小功率薄膜贴片电阻,属于其工业级电阻系列的核心型号。型号编码中:
该产品针对高密度集成、宽温稳定、高精度要求的电路场景,是便携式电子、工业控制等领域的常用选型。
阻值固定为200Ω,精度达**±0.1%**——这一精度远高于普通厚膜电阻(通常±1%~±5%),可直接应用于测试仪器、医疗设备等对阻值误差敏感的场景,避免因偏差导致信号失真或控制精度下降。
需注意实际使用限制:需同时满足「功率≤63mW」和「电压≤50V」,例如当电压达50V时,功耗为50²/200=12.5W(远大于63mW),此时需以功率为核心,实际工作电压需控制在≈3.56V以内(√(63mW×200Ω))。
温度系数为**±25ppm/℃**,即温度每变化1℃,阻值变化5μΩ(200Ω×25×10⁻⁶)。这一参数表现优异,远优于厚膜电阻(通常±100ppm/℃以上),确保宽温环境下阻值稳定性。
采用0402封装(英制:1.0mm×0.5mm;公制:1005),是小型化贴片电阻的主流封装之一,可显著提升PCB集成密度,适配智能手机、可穿戴设备等对空间要求严苛的产品。
薄膜电阻的功率能力随温度升高下降,需遵循松下降额标准:
实际应用需结合工作温度,避免功率过载导致性能失效。
工作温度范围覆盖**-55℃~+155℃**,满足工业级环境要求(如汽车电子、户外设备的极端温度场景)。结合±25ppm/℃的TCR,全温度范围内阻值最大变化量为:
200Ω×25ppm/℃×210℃(-55℃→155℃温差)=1.05Ω,相对变化仅0.525%。
叠加±0.1%的精度后,整体阻值偏差控制在±0.625%以内,稳定性远超行业平均水平。
该产品以高性价比平衡了精度、稳定性与集成度,是小型化电路设计的可靠选型。
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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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