Model & package intelligence
Model text, package form, tray or reel details, and visual evidence are reviewed together before RFQ feedback.
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Technical data
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SPM2512-2R2MA是长江微电(cjiang)推出的贴片式功率电感,专为中低功率电子设备的电源管理电路设计。该产品采用SMD封装,尺寸为2×2.5mm(长×宽),体积紧凑,适配高密度PCB布局,可满足便携式电子、消费类电子等小型化设备的核心需求。
电感标称值为2.2μH,精度±20%,符合功率电感的常规精度要求——既保证批量生产的一致性,又降低成本,适配大多数DC-DC变换器、滤波电路的电感值需求(无需过高精度的场景)。
额定电流(I₍rated₎):3A(25℃环境下)
指电感连续工作时,自身温升不超过允许范围(通常≤40℃)的最大电流,是实际应用中推荐的长期工作电流上限。
饱和电流(I₍sat₎):3.8A
行业通用定义为“电感值下降30%时的临界电流”——此时电感储能能力和滤波效果明显衰减。3.8A的饱和电流比额定电流高26.7%,能有效应对电路中的瞬态电流波动(如负载突变、启动瞬间),提升电路稳定性。
直流电阻为55mΩ,是电感绕组铜损的主要来源。低DCR可显著减少功率损耗(公式:P=I²×R),例如在3A工作电流下,损耗仅为0.495W,有助于提升电源转换效率、降低设备发热。
采用SMD贴片封装,尺寸2×2.5mm,厚度符合行业小型化标准(约1.2mm),适配自动化贴装生产线,兼容常规回流焊工艺,焊接可靠性高,可直接集成到紧凑PCB中。
长江微电(cjiang)是国内专注功率电感研发的厂商,产品覆盖消费电子、汽车电子(部分系列)等领域。SPM2512-2R2MA符合RoHS无铅环保标准,经过以下可靠性测试:
该产品是中低功率电源电路的高性价比选择,可满足大多数小型化电子设备的电感需求。
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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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