Overview
The 30A circuit breaker is a critical component in electrical systems, designed to safeguard wiring and devices by interrupting excessive current. Rated for 30 amperes, it is widely deployed in panels for HVAC units, industrial machinery, and high-power outlets. Its reliability stems from a robust trip mechanism that responds to thermal or magnetic triggers. Modern 30A breakers adhere to international standards like UL 489 or IEC 60898, ensuring compatibility and safety. They are available in single-pole to four-pole configurations, catering to diverse voltage systems (120V–480V). B2B buyers should prioritize certified products to mitigate risks.
Structure and Working Principle
A 30A breaker comprises a bimetallic strip (thermal trip) and an electromagnet (magnetic trip). During overload, the bimetallic strip heats and bends, tripping the mechanism. For short circuits, the electromagnet’s instantaneous force releases the latch, cutting power within milliseconds. Enclosures are typically flame-retardant thermoplastic, with copper or silver alloy contacts for durability. Modular designs allow easy DIN-rail mounting in distribution boards. Advanced models include indicators for fault detection, aiding maintenance.
Key Features
Key features include a 30A current rating, adjustable trip settings (in some models), and compact footprints for space efficiency. Arc-extinguishing chambers prevent hazardous sparks, while dual-terminal designs simplify wiring. Some variants offer remote monitoring via IoT integration, appealing to smart-grid applications. High-breaking-capacity (HBC) versions withstand surges up to 10kA, ideal for industrial environments with volatile loads.
Application Areas
Common applications include protecting dedicated circuits for water heaters, air conditioners, and workshop equipment. In commercial settings, they secure lighting panels and server racks. Industrial uses extend to motor control centers and renewable energy systems. Data centers prioritize 30A breakers with low impedance to minimize voltage drops. Offshore and marine sectors opt for corrosion-resistant models with waterproof housings.
Maintenance and Precautions
Regular inspection for wear, overheating signs, or loose connections is advised. Test tripping functionality annually using calibrated equipment. Replace units with cracked casings or persistent nuisance tripping. Avoid mixing brands in panels, as compatibility issues may arise. Always de-energize circuits before servicing. For high-vibration environments, use breakers with mechanical latching reinforcements.
B2B Procurement Guide
Bulk buyers should verify supplier certifications (ISO 9001, RoHS) and request test reports. MOQs vary; negotiate tiered pricing for 100+ units. Lead times typically range from 2–6 weeks, depending on customization. Consider total cost of ownership—premium brands like Schneider or Siemens offer longer lifespans, reducing replacement frequency. For global projects, ensure compliance with regional norms (NEMA, CE, CCC).
Related Manufacturers
- 主营：国巨电容、国巨电阻、三星电容、华新科、伍尔特电感、二极管、三极管、贴片电感、lm317to-220、贴片排阻、贴片电阻、贴片电容、贴片磁珠、贴片滤波器、s8050s0t23、旺诠电阻、厚声电阻
- 主营：继电器、ir中国授权、频率合成器、XC3030A、ad8532ar放大器、ad828arz放大器、ad829jrz放大器、ad818arz放大器、ad8031arz放大器、ad8058arz放大器、ad8532arz放大器、ad8001arz放大器、ad8307arz放大器、ad8651armz放大器、ad8099ardz放大器、ad8534aruz放大器、ad706jr通用运放、op42gsz精密运放、op90gpz通用运放、ad8417brmz放大器、op07csz精密运放、ad712jrz精密运放、hmc326ms8ge放大器、op490gsz通用运放、op162gsz精密运放、ad848jrz通用运放
- 主营：放大器、检测器、滤波器、30A、调制器、发射器、接收器、衰减器、解调器、变压器、合成器、收发器、偏置器、振荡器、rfid天线、终端负载、隔直流器、微波射频、集成电路、同轴开关、接入监控ic、频率综合器、射频适配器、多路复用器、耦合器电桥、定向耦合器
- 主营：费斯托电磁阀、FESTO气缸、ASCO电磁阀、喜开理气缸、CAMOZZI电磁阀、派克软管、THK、诺冠电磁阀、意大利SIRAI电磁阀、贺德克蓄能器、易福门传感器、罗克韦尔、宝德电磁阀、Atos溢流阀、Aventics气缸、danfoss压力开关
- 主营：费斯托气缸、标准气缸、旋转气缸、直行程SMC气缸、smc气缸、SMC气缸、亚德客TACQ气缸、mhw2气缸、无杆气缸、不锈钢气缸、SDAJ可调气缸、三轴导杆气缸、多级气缸、SMC无杆气缸、不锈钢迷你气缸、迷你气缸、SMC薄型气缸、SMC标准气缸、SMC三轴气缸、薄型气缸、滑台气缸、旋转摆动气缸、三轴气缸、SMC倍力气缸
- 主营：30A、三相滤波器、继电器、连接器
- 主营：贴片二极管、场效应管、安森美MOS场效应管、快恢复二极管、开关二极管、TVS二极管、ESD二极管、达林顿三极管、MOS管、贴片三极管、肖特基二极管、稳压二极管
- 主营：气缸、电磁阀、SMC气缸、亚德客气缸、气动元件、亚德客电磁阀、FESTO电磁阀、SMC电磁阀、CKD气缸、SC标准气缸、MA迷你气缸、SDA薄型气缸、带导杆气缸、滑台气缸、手指气缸、旋转气缸、三位五通电磁阀、非标气缸定制、气缸平替、气源处理器、气动接头、快速接头、费斯托气缸、高温气缸、低温气缸
- 主营：IC、三极管、电容电阻、XC3030A、单片机、继电器、集成电路、芯片
- 主营：电源管理(PMIC)、集成电路(IC)、信号继电器、XC3030A、模数转换器(ADC)、数模转换器(DAC)、功率继电器、DC-DC 转换器、AC-DC 转换器、模块、胶带粘合剂、高压连接器、汽车继电器、电源管理 IC、变压器、ESD保护二极管/T、工业接近传感器
- 主营：磁性材料测、gwinstek固纬电源、GPS北斗卫星导航系统、信号发生器、频谱分析仪、万用表、场强仪、探头、热像仪、电子负载、电池测试仪器、数字电视信号发生器、北斗信号发生器、视频信号发生器、FM信号发生器、电源、频谱仪、立体声信号发生器、广电信号分析仪、信号分析仪、多功能安规测试仪、安规综合测试仪、耐压测试仪、安规测试仪、线性直流电源
- 主营：二三极管、场效应管、桥堆、光耦、IC、保险丝、可控硅、贴片安规电容、扬杰IGBT、贴片压敏电阻、贴片Y电容
- 主营：泰科连接器、莫仕连接器、胡连连接器、30A、矢崎连接器、安普连接器、新能源汽车连接器、博世连接器、安波福连接器、JST连接器、HRS连接器、汽车连接器、线束连接器、汽车插接器、汽车护套、电路板接插件连接器、胶壳连接器、TE连接器、itt连接器、AMP连接器、PCB板端接插件、MOLEX连接器、德尔福连接器、APTIV连接器、汽车护套端子接插件、新能源高压连接器
- 主营：连接器、继电器、滤波器、30A、导轨端子
- 主营：ad7794bruz、adum1250arz、贴片电阻、30A、贴片电容、adi亚德诺、0603b105k500nt、1206b103k500nt、0603b103k500ct、0603b224k250nt、0805b105k160ct、rc1206fr-070rl、0805b103k500ct、0603b225k160nt、0603x105k250ct、0603b105k250nt、rc0402jr-071ml、0805x476m6r3nt、0402b104k160nt、0603b472k500nt、rc0603fr-072rl、0402b104k250nt、1206b103k500ct、0603x106m100nt、1206b102k102nt、0402b103k500ct