WMSIC Electronic Components

JJW JST24A-800BW JST24A

ModelJST24A-800BW
PackageTO-220
BrandJJW
Price Price on request Electronic component prices change quickly with market supply and demand. Please refer to the latest WMSIC quotation for current pricing.
Configuration
1 options
Configuration 26+

Available for RFQ

Technical data

Product details

19 specifications

Core information

Product name
JJW JST24A-800BW
Type
JJW
Minimum package
50 管

Technical parameters

Electronic Component
Electronic Component
Electronic Component
JJW
Electronic Component
JST24A-800BW
Electronic Component
1
Package
TO-220
Electronic Component
Thyristor (SCR) / Module
Electronic Component
2.68g
Electronic Component
1
Electronic Component
BM0257700963
Operating Temperature
40℃~+125℃
Surge Current
250A
Latching Current(Ih)
75mA
Current(It)
25A
Electronic Component
Electronic Component
Electronic Component
50
Voltage(Vtm)
1.5V

For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.

JST24A-800BW 产品概述

一、产品简介

JST24A-800BW 是捷捷微(JJW)推出的一款高电压、高浪涌能力的门极触发型可控硅(SCR),封装为常见的 TO-220。器件以 800V 的反向阻断电压与较高的浪涌电流能力为核心设计,适用于需要高压耐受和脉冲能力的功率控制场合。其门极触发要求低、保持电流小,便于与通用驱动电路配合使用。

主要规格(概要)

  • 型号:JST24A-800BW(TO-220)
  • 品牌:JJW(捷捷微)
  • 断态峰值电压 Vdrm:800 V
  • 通态额定电流 It:25 A
  • 通态峰值电压 Vtm:1.5 V
  • 浪涌电流(峰值):250 A
  • 门极触发电压 Vgt:1.3 V
  • 门极触发电流 Igt:50 mA
  • 保持电流 Ih:75 mA
  • 门极平均耗散功率 PG(AV):1 W
  • 工作温度:-40 ℃ ~ +125 ℃
  • 封装:TO-220

二、主要特性与优势

  • 高电压耐受:800V 的断态峰值电压满足中高压电源与功率电子线路的要求,适合电源保护与高压整流侧控制。
  • 强抗浪涌能力:250A 的单次浪涌能力使器件在启动冲击、电流尖峰或短时过载情况下仍有较好的生存能力。
  • 低门极触发要求:Vgt 仅 1.3V,Igt 50mA,便于用低压逻辑或小功率驱动器直接触发。
  • 封装易散热:TO-220 标准引脚与散热片安装方式,便于在较大通态电流下进行热管理和散热设计。
  • 宽温度范围:-40 ℃ 至 +125 ℃ 的工作温度范围,适合工业级环境。

三、典型应用场景

  • 交流/直流功率调光与相角控制(如灯光调光、加热器功率控制)
  • 电机软启动与速度控制(需配合合适触发与保护电路)
  • 过流/过压保护电路(如过压瞬态钳位或整流桥保护)
  • 开关电源或电池充放电控制中的高压元件
  • 工业电源、家电、电暖器等大功率负载控制

四、封装与引脚说明

JST24A-800BW 采用 TO-220 封装,标准三引脚布局,便于在通用的散热片和 PCB 布局中使用。安装时注意螺栓紧固面与散热片之间的绝缘与热阻要求(视系统是否允许散热片与器件主体电气连接而定)。

五、热管理与可靠性建议

  • 功率耗散估算:在额定通态电流下,若 Vtm 为 1.5V,则器件在 25A 时瞬时功耗可达 ~37.5W。此功耗为较大热负荷,必须配备合适散热器或强制风冷。实际设计中需参考器件完整数据手册中的热阻和在不同电流下的 V-I 特性做精确计算与散热设计。
  • 散热建议:长期高电流工作时优先采用散热片并保证良好接触热界面材料;必要时采用绝缘垫与导热垫配合螺栓固定;对热阻要求严苛的场合,应考虑风冷或液冷。
  • 温度与寿命:靠近上限温度 (+125 ℃) 时应进行电流/功率降额以保证长期可靠性。建议在系统级别对器件结温进行监测与保护。

六、驱动与保护要点

  • 门极驱动:因 Vgt = 1.3V、Igt = 50mA,门极驱动电压通常采用 2–5V 的脉冲电平即可可靠触发。建议在门极串联限流电阻以控制触发电流并限制门极平均耗散(PG(AV)=1W)。选定驱动电阻可按 R = (Vdrive − Vgt) / Igt 的近似关系估算,并根据触发脉冲宽度调整。
  • 触发形式:可采用单脉冲驱动或重复脉冲驱动,触发频率与占空比会影响门极耗散与器件热平衡。
  • 抑制措施:在高 dv/dt 或感性负载场合,需并联 RC 振荡抑制网(snubber)或使用反并联快恢复二极管以防止误触发与过电压应力。
  • 保护电路:对浪涌与短路情况建议配合熔断器、限流电阻或电子限流电路,避免器件在无散热保护或长期过载下损坏。

七、注意事项

  • 在电路设计与选型时,应以完整的器件数据手册为准,特别是 V-I 曲线、热阻参数和最大重复或非重复浪涌能力等详细指标。
  • 门极耗散 PG(AV) 仅 1W,应避免门极在高频率或长脉冲条件下承受过大平均功率。
  • 装配时注意 TO-220 引脚绝缘与散热片接地状态,防止意外短路。
  • 储存、运输与焊接过程中注意静电防护与温度控制。

若需更详细的热阻、V-I 特性曲线、最大重复浪涌 (IFRM)、非重复浪涌 (I2t) 能力或典型应用电路图,请提供或索取 JST24A-800BW 的完整技术规格书(datasheet),以便进行精确的系统级设计与验证。

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