行业组件数据 · 2026

双金属片

A temperature-sensitive bimetallic strip used in circuit breaker trip mechanisms for thermal overload protection.

技术定义与适配语境
典型 双金属片 会按材料、尺寸公差、适配关系和失效风险在 电气设备制造 中评估。

A precision-engineered component consisting of two bonded metal strips with different coefficients of thermal expansion, designed to bend predictably when heated by electrical current, thereby actuating the trip mechanism in circuit breakers to interrupt power during overload conditions.

组件规格

定义
A precision-engineered component consisting of two bonded metal strips with different coefficients of thermal expansion, designed to bend predictably when heated by electrical current, thereby actuating the trip mechanism in circuit breakers to interrupt power during overload conditions.
工作原理
Operates on differential thermal expansion: when current flows through or near the strip, resistive heating causes the metals to expand at different rates, creating mechanical deflection that triggers the trip mechanism at a calibrated temperature threshold.
材料
Typically composed of high-conductivity copper or nickel-iron alloy bonded to low-expansion invar or manganese-nickel alloywith specific thickness ratios (e.g.1:1 to 3:1) and bonding via rollingweldingor cladding.
Response Time
2-30 seconds depending on overload
Deflection Angle
15-45 degrees at trip point
Electrical Resistance
0.1-10 mΩ depending on design
Trip Current Accuracy
±10% of rated current
Operating Temperature Range
-40°C to 150°C
标准
IEC 60947-2UL 489ISO 8820-2

行业分类与别名

双金属片 的常用贸易名称、技术标识和检索关键词。

上级产品

该组件会出现在以下整机或工业产品中。

FMEA · 风险与缓解

诱因 → 失效模式 → 工程缓解

Material fatigue from thermal cycling->Reduced deflection sensitivity leading to missed trips->Use fatigue-resistant alloys and design for minimum stress concentrations
Corrosion at bonding interface->Delamination and loss of thermal response->Apply protective coatings and ensure clean bonding surfaces

工业生态与工程逻辑

0
Fatigue failure from repeated cycling
1
Calibration drift due to material aging
2
Contamination affecting thermal response

合规与检测

tolerance
Trip current tolerance ±10%, deflection repeatability ±5%
test method
Thermal cycling test per IEC 60947-2, current injection testing with infrared thermography

制造该组件的工厂

来自 CNFX 组件能力表的相关制造商资料。

制造商列表用于前期研究和供应商能力理解,不代表认证、排名或交易担保。

采购评估维度

不是客户评论,也不是实时热度。以下维度用于前期 RFQ 准备和供应商评估。

技术文档
4/5
制造能力
4/5
可检验性
5/5
供应商透明度
3/5

这些分值是采购评估维度示例,不代表真实客户评分、具体国家买家反馈或实时询盘。

相关组件

常见问题

How does a bimetal strip protect against electrical overload?

It bends when heated by excessive current, mechanically triggering the circuit breaker to open and interrupt the circuit.

Can bimetal strips be calibrated for different trip currents?

Yes, through material selection, thickness ratios, and mechanical pre-tensioning during manufacturing.

我可以直接联系工厂吗?

CNFX 是开放目录,不是交易平台或采购代理。工厂资料和表单用于帮助你准备直接沟通。

CNFX Industrial Component Index · 电气设备制造

数据基础

CNFX 制造商资料、技术分类、公开产品信息和持续合理性检查。

初步技术归类
本页用于结构化准备研究、RFQ 和供应商评估,不替代买方自己的供应商资质审查、标准核验和技术批准。

请求制造能力信息: 双金属片

说明目标数量、应用场景、交期和关键技术要求,用于准备 RFQ 或供应商评估。

谢谢,信息已发送。
谢谢,信息已收到。

需要制造 双金属片?

对比具备该组件加工或装配能力的制造商资料。

创建制造商档案 联系我们
上一个组件
参考电阻器
下一个组件
双金属片
URN:CNFX:ME:UNIT:BIMETAL_STRIP