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 <P → P stands for P P . Conditions: Pulse added time 脉冲施加时间=1000h (V P <V R → V R stands for V P ). Resistance change 阻值变化=±5% Room temperature 室温
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]。