金属氧化膜电阻耐脉冲电力特性曲线

（参考特性tech notes ）

金属氧化膜固定电阻器脉冲特性Limitations of Potential Pulsing on Metal Oxide Resistors ■ Pulse Characteristics (Usual) 脉冲特性（通常）

P P : Pulse limit power 脉冲限制功率(W) V P : Pulse limit voltage 脉冲限制电压(V)

τ: Pulse continuous time 脉冲持续时间 (s)

T : Period 周期 (s)

V R : Rated voltage 额定电压 (V) P : Rated power 额定功率 (W) R : Nominal resistance 标称阻值(Ω)

V P max . : Max. pulse limit voltage 最大脉冲限制电压(V)

Withstand pulse limit power is calculated by the following method.耐受脉冲限制功率按下式计算： P P =K·P·T/τ

Refer to the right for a fixed number of V Pmax. V P max 请参考右表。

●T>1(s)→ T=1(s). ●Added voltage.施加电压≤V P max 。

●T/τ>100 →T/τ=100. ● P P or V P is reference value. P P 或 V P 为参考值。 ● P P

The peak power is defined as the maximum power dissipated at any point in time regardless of the waveform shape. 峰值功率是指最终耗散在任意点的最大功率 而不论波形。

The pulse waveform, if other than a square wave, must first be converted to an approximated square wave as shown on the right.

如果其他脉冲波形与方波相比，必须先转换为近似 方波，如右图所示。

t : Time to attenuate down to the rated power 衰减至额定功率时间

(s)

Type K

V P max

RY15-1/2W

0.5 600

RY16-1W 0.5 600 RY17-2W 0.5 700 RY18-3W 0.5 700

■Pulse Characteristics (Inrush) 脉冲特性（浪涌）

[Conditions条件]

Resistance change≤±5% with pulse 1000cycles as in the figure below.(Reference Only). 按下图规范1000次循环，阻值变化≤±5%（仅作参考）

1)Added power and added voltage are within the lower territory of this graph.

施加功率和电压应在下图曲线区域内。

2)Added in normal temperature and humidity.在正常温度和湿度情况下。

[Waveform波形]