详细信息
一类为温度补偿类NPO电介质
这种电容器电气性能最稳定,基本上不随温度、电压、时间的改变,属超稳定型、低损耗电容材料类型,适用在对稳定性、可靠性要求较高的高频、特高频、甚高频电路中。
二类为高介电常数类X7R电介质
。由于X7R是一种强电介质,因而能制造出容量比NPO
介质更大的电容器。这种电容器性能较稳定,随温度、电压时间的改变,其特有的性能变化并不显著,属稳定电容材料类型,使用在隔直、耦合、傍路、滤波电路及可靠性要求较高的中高频电路中。
三类为半导体类Y5V电介质
色环电容和轴向电容器具有较高的介电常数,常用于生产比容较大、标称容量较高的大容量电容器产品。但其容量稳定性较X7R差,容量、损耗对温度、电压等测试条件较敏感,主要用在电子整机中的振荡、耦合、滤波及傍路电路中。
色环电容和轴向电容比一般瓷介电容器大(10pF~10μF),且电容量大、体积小、可靠性高、电容量稳定,耐高温,绝缘性好,成本低等优点,因而得到广泛的应用。独石电容器不仅可替代云母电容器和纸介电容器,还取代了某些钽电容器,广泛应用在小型和超小型电子设备(如液晶手表和微型仪器)中。
独石电容的特点:
温度特性好,频率特性好。一般电容随着频率的上升,电容量呈现下降的规律,独石电容下降比较少,容量比较稳定。
适用场合
应用范围:
广泛应用于电子精密仪器。各种小型电子设备作谐振、耦合、滤波、旁路。
容量范围:
10pF~10μF
耐压:二倍额定电压。
电气性能标准THE STANDARD OF THE ELECTRICAL PROPERTICAC
检验项目 ITEM | 检验标准 TEST STANDARD | ||||||
NPO(N) COG(CG) | X7R(B) | Z5U(E) | Y5V(Y、F) | ||||
电容量(C) Capacitance | 在相应的误差 范围内 In the tolerance | 在相应的误差 范围内 In the tolerance | 在相应的误差 范围内 In the tolerance | 在相应的误差 范围内 In the tolerance | |||
损耗角正切(DF) Dissipation Factor | CR≥50pF DF≤0.15% CR<50pF DF≤1.5[(150/CR)+7] ×10-4 | ≤3.5% | ≤5% | ≤3.5%(150000PF以下) ≤10%(220000-470000PF) ≤15%(480000-1000000PF) | |||
绝缘电阻(IR) Insulation Resistance | C≤ 10nF R>10000 MΩ C> 10nF R.C> 100S | C≤ 25nF R>4000 MΩ C> 25nF R.C> 100S | C≤ 25nF R>4000 MΩ C> 25nF R.C> 100S | C≤ 25nF R>4000 MΩ C> 25nF R.C> 100S | |||
耐电压 Dielectric Withstanding Voltage | 2.5倍额定电压 2.5×rated Voltage | 2.5倍额定电压 2.5×rated Voltage | 2.5倍额定电压 2.5×rated Voltage | 2.5倍额定电压 2.5×rated Voltage | |||
测试条件 TEST CONDITION | |||||||
测试频率 Test Frequency | 100kHZ (C>1000PF,1KHZ) | 1KHZ | 1KHZ | 1KHZ | |||
测试电压 Test Voltage | 1±0.2VDC | 1±0.2VDC | 0.3±0.2VDC | 0.3±0.2VDC | |||
绝缘电阻测试电压 Test Voltage of IR | 额定电压 Rated Voltage | 额定电压 Rated Voltage | 额定电压 Rated Voltage | 额定电压 Rated Voltage | |||
环境温度 Temperature | 18℃~25℃ | 18℃~25℃ | 18℃~25℃ | 18℃~25℃ | |||
环境湿度 Humidity | < 75% | < 75% | < 75% | < 75% | |||
温度系数 Temperature Coefficient | 0±30ppm/℃ -55℃to +125℃ | ±15% -55℃to +125℃ | +22% to–56% +10℃to +85℃ | +30% to-80% -25℃to +85℃ | |||
品质检验项目及可靠性试验QUALITY INSPECTION AND RELLABILITY
项目 ITEM | 检验标准 TEST SPECIFICATIONS | 检验方法 TEST METHODS | ||||||
可焊性 Solderablity | 引线表面均匀沾锡,上锡面积不小于总面积的75%。 Lead wire shall be soldered with uniformly coated on the axial or radial direction over 3/4 of the circumferential direction. | 将电容器引线浸入含25%酒精(或异丙醇)的松香溶液后浸入焊接槽温度为235±5℃的焊锡中2±0.5秒,浸入深度距离电容体2.5~3.0mm。 The lead wire of a capacitor shall be dipped into a 25% methanol solution of rosin and then into molten solder of 235±5℃ for 2±0.5 seconds ,in both cases the depth of dipping is up to about 2.5 to 3.0 mm from the root of lead wires. | ||||||
耐焊性 Resistance To soldering heat | 外观 Appearance | 无损伤 No marked defect | 焊锡温度265±5℃,时间5±0.5秒,插入深度距离电容体2.5~3.0mm,插入速度1秒,试验后2~24小时测量。 The lead wire shall be immersed into the melted solder of 265±5℃,up to about 2.5 to 3.0mm from the main body for 5±0.5 sec and the specified items shall be measured after leaving for 2 to 24 hours. | |||||
容量变化ΔC/C Capacitance change | NPO:≤5% X7R:≤-5~+10% Y5V:≤-10~+20% | |||||||
介电强度(引线间) Dielectric strength(between lead wires) | 不失效 No failure | |||||||
耐久性 List test | 外观 Appearance | 无外观损伤 No marked defect | 条件 Condition | NPO | X7R | Y5V | Z5U | |
容量变化ΔC/C Capacitance change | NPO:≤2% X7R:≤20% Y5V:≤30% | 温度 Temperature | +125℃ | +85℃ | ||||
D.F. | NPO:≤0.3% X7R:≤5% Y5V:≤7% | 时间 Time | t=1000h | |||||
R.C>25S | 电压 Voltage | V=1.5Vr | ||||||
恢复时间 Recovery time | 24±1h | |||||||
引出端强度 Strength of Lead temination | 拉力 Pull | 引线不断 电容器不破损 Lead wire shall not cut off. Capacitor shall not be broken. | 如图:固定电容器并加力,引线直径0.5mm以上加力3kg,保持5秒 As a figure, fix the body of capacitor, apply a tensile weight gradually to each lead in the radial direction of capacitor up to 2 okgf, and keep it for l to 5 sec. | G | ||||
折弯 Bending | 引线负荷0.5kg向一方向折弯900后恢复原位,再向反方向折弯900恢复原状为一次,共3次。 Each lead wire shall be subjected to 0.5kgf weight and then a 900bend at the point of egress, in one direction, return to original position and then a 900bend in the opposite direetion at the rate of one bend. | |||||||