Model & package intelligence
Model text, package form, tray or reel details, and visual evidence are reviewed together before RFQ feedback.
BHFUSE BSMD0805-020-30V BSMD0805
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- BHFUSE BSMD0805-020-30V
- Type
- BHFUSE
- Minimum package
- 5000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- BHFUSE
- Electronic Component
- BSMD0805-020-30V
- Electronic Component
- 1
- Electronic Component
- 1.5mm
- Package
- 0805
- Electronic Component
- Resettable Fuse
- Electronic Component
- 0.022g
- Electronic Component
- 2.2mm
- Electronic Component
- 0.9mm
- Electronic Component
- 1
- Electronic Component
- 20ms
- Electronic Component
- BM0226538857
- Operating Temperature
- 40℃~+85℃
- Voltage Rating(Vmax)
- 30V
- Power(Pd)
- 500mW
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
BSMD0805-020-30V 产品概述
一、产品简介
BSMD0805-020-30V 是佰宏（BHFUSE）推出的一款0805封装自恢复保险丝（PTC/聚合物保险元件），用于电路过流保护与短路限流。器件尺寸符合0805 表面贴装规范，适配自动贴片和回流焊工艺，针对消费电子、通讯模块和电源接口的短时过流保护设计。
二、主要性能参数
- 工作温度：-40℃ ~ +85℃
- 封装尺寸：0805（长度 2.2 mm × 宽度 1.5 mm × 高度 0.9 mm）
- 初始阻值（Rmin）：0.5 Ω
- 跳断后阻值（R1max）：3.5 Ω
- 保持电流（Ihold）：200 mA
- 跳闸电流（Itrip）：500 mA
- 最大电流（Imax）：40 A
- 最大耐压（Vmax）：30 V
- 最大耗散功率（Pd）：500 mW
- 动作时间：20 ms（典型或测试条件下）
三、工作原理与动作特性
该自恢复保险丝在小于保持电流范围内呈低阻状态，允许正常工作电流通过；当电流超过跳闸电流时，聚合物材料受热电阻迅速上升，限制电流并将电路电流降至安全水平。故障解除后，元件冷却恢复低阻态，实现自动复位。动作时间约 20 ms，适合抑制短时浪涌与瞬态短路。
四、应用场景
- USB、I/O 接口的过流保护
- 电池管理与充电电路防护
- 摄像模组与传感器电源保护
- 工业控制小功率子模块保护 适用场景需满足最大耐压 30 V 与环境温度限制，并注意周围散热条件以确保 Pd 500 mW 不被长期超载。
五、选型与布局建议
- 选型原则：Ihold 应大于电路最大稳态工作电流，Itrip 应低于后级器件可承受的破坏电流。对于频繁浪涌场合，宜选用更高 Itrip 或并联保护手段。
- 布局建议：贴片距离焊盘应符合 PCB 制造工艺，避免元件脚间热耦合；靠近受保护负载放置以缩短响应路径；与热源保持适当距离，避免环境温度偏高导致误动作。
- 焊接工艺：兼容标准回流温度曲线，避免超时高温或机械应力，回流后建议进行外观与阻值测试。
六、可靠性与限制
- 不能作为持续限流器使用，频繁长时间超载会降低寿命或导致特性漂移。
- 最高耐压 30 V 限制其在高压系统中的直接应用。
- 对热环境敏感，附近高功耗器件或密集布线需考虑热耦合影响。
本器件适合对体积、成本和自动复位有较高要求的中低功率保护场合。选用时应结合实际工作电流、环境温度和安全裕度进行验证与必要的实验测试（如 I-T 曲线、热冲击与寿命评估）。
Request for quote
Send RFQ
Use the form for single models, category sourcing, and multi-line BOM requirements.
Product sourcing intelligence
Model, package, availability, and BOM fit reviewed before quotation.
WMSIC turns product data, package visuals, BOM context, and sourcing signals into practical RFQ notes for buyers.
BOM matching & alternatives
BOM lines are compared by package, parameters, quantity, and workable alternatives for cleaner sourcing decisions.
Sourcing availability signal
Stock routes, quotation confidence, lead-time notes, and shipment feasibility are checked before sales follow-up.
Buyer sourcing scenarios
Examples of how common component sourcing requests are organized.
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.
Related products
Packaged components ready for RFQ.
