Main Features:
The document describes the 75A standard silicon controlled rectifiers (SCRs) with key features including a repetitive peak off-state voltage (V_DRM) and reverse voltage (V_RRM) ranging from 1200 to 1600 volts, and a gate trigger current (I_GT) between 10 to 80 mA. The SCRs are designed for high performance with glass passivated technology, suitable for applications requiring robust power handling and dissipation.

Specifications:
- RMS on-state current (I_T(RMS)): 75 A
- Non-repetitive surge peak on-state current (I_TSM): 750 A for 50 Hz and 790 A for 60 Hz
- Storage temperature range: -40 to +150°C
- Operating junction temperature range: -40 to +125°C
- Maximum gate power dissipation: 5 W
- Insulation voltage: 2500 V_RMS

Electrical Specifications:
At a junction temperature (T_J) of 25°C, the SCRs exhibit:
- Gate trigger voltage (V_GT): 1.5 V max
- Holding current (I_H): 50 mA max
- Latching current (I_L): 100 mA max
- On-state voltage (V_TM): 1.8 V max

Thermal Resistance:
- Junction to case (R_th(j-c)): 0.60°C/W
- Junction to ambient (R_th(j-a)): 40°C/W

Applications:
The 75PTxxCI series is suitable for general-purpose applications such as solid-state relays, welding equipment, high power motor control, power chargers, and phase control applications.

Figures and Graphs:
- Fig.1 shows the maximum power dissipation versus RMS on-state current.
- Fig.2 illustrates RMS on-state current versus case temperature.
- Fig.3 and Fig.4 provide on-state characteristics and surge peak on-state current versus the number of cycles, respectively.
- Fig.5 and Fig.6 depict non-repetitive surge peak on-state current for a sinusoidal pulse and relative variations of gate trigger current, holding current, and latching current versus junction temperature.