【选型】ISABELLENHUETTE推出容差高达0.5%的高精密功率电阻器,非常适用于航空航天级应用
德国ISABELLENHUETTE公司在热电合金、电阻器合金及低阻值精密和功率电阻器以及精密电流和电压传感器等产品方面掌握先进技术,是该领域世界上最领先的制造商。其推出的SMP-PW、SMS-PW、SMT-PW,SMV-PW为高功率精密电阻器。其中,SMP-PW、SMS-PW、SMT-PW具有2个引脚,SMV-PW具有4个引脚。这几款电阻器均支持回流焊接、红外焊接两种方式,主要应用于航空航天领域。
图1 精密电阻器的外观图
在航空航天领域,对使用的仪器可靠性,精度和寿命等方面都有非常高的要求,一般的电阻在性能和精度方面无法达到这样的要求。因此,在选择器件时应该考虑上述要求,选择满足上述条件的器件。ISABELLENHUETTE公司推出的多个系列精密电阻器,遵循最严格的的质量标准和个性化要求(ESCC4001)。与此同时,采用SnPb镀锡触点可防止晶须形成,从而确保即使在极端条件下也能安全使用元件。同时,电阻器质保期长,采用保护气体进行包装,可以保证产品具有较长的使用寿命。因此,该产品非常适合航天领域应用。
在电气特性上,四款精密电阻器阻值范围分别为5mΩ~1Ω、3mΩ~1Ω、4mΩ~2Ω,3.3mΩ~1Ω。容差均高达0.5%,对应的额定功率分别为1W、2W、3W,3W。电阻器的脉冲额定功率均较高,具有较高的脉冲负载能力。SMP-PW、SMS-PW,SMT-PW,SMV-PW的连续电流分别高达24A(阻值为5mΩ)、25A(阻值为3mΩ),27A(阻值为4mΩ),30A(阻值为3.3mΩ)。根据上述数据分析可以发现,该系列电阻器均具有大电流负荷能力和出色的长期稳定性,满足航天领域对产品稳定性的要求。
另外,在航天领域的应用,容易出现极其恶劣的环境,因此要求选用的器件能够在恶劣环境下正常工作,不受其影响。该系列精密电阻器的应用温度范围为-55℃~170℃(SMV-PW为-55℃~140℃)。该范围表明可以在极寒或者高温条件下使用,符合航天级器件的温度要求。电阻器具有高可靠性和高稳定性,为恶劣环境下工作提供了可靠保障。
精密电阻器的主要特性如下:
•高脉冲功率
•安装方式:回流焊接,红外焊接
•镀锡触点
•出色的长期稳定性
▪符合ESCC4001规范
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可加工PCB层数:1-30层;板材类型:FR4板/铝基板/铜基板/刚扰结合板/FPC板/高精密板/Rogers高频板;成品尺寸:5*5mm~53*84cm;板厚:0.1~5.0mm。
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加工精度:精密平面磨床正负0.002;铣床正负0.02,ZNC放电正负0.01。CNC加工材料:铝、钢、聚合物等材料。专注于半导体行业、医疗器械、汽车行业、新能源行业、信息技术行业零部件加工。
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