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MSS40-1200
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Product Detailed Parameters
- Description：MODULE SCR BACK TO BACK ISOTOP
- Series：-
- Mfr：STMicroelectronics
- Package：Tube
- Structure：1-Phase Controller - All SCRs
- Number of SCRs, Diodes：2 SCRs
- Voltage - Off State：1.2 kV
- Current - On State (It (AV)) (Max)：-
- Current - On State (It (RMS)) (Max)：55 A
- Current - Non Rep. Surge 50, 60Hz (Itsm)：400A, 420A
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Chassis Mount
- Package / Case：ISOTOP
- Voltage - Gate Trigger (Vgt) (Max)：1.3 V
- Current - Gate Trigger (Igt) (Max)：50 mA
- Current - Hold (Ih) (Max)：80 mA
- Grade：-
- Qualification：-
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Overview
The MSS40-1200 is a back-to-back Silicon Controlled Rectifier (SCR) module manufactured by STMicroelectronics, designed for high-power AC switching applications. It features an ISOTOP package with a rated repetitive off-state voltage of 1.2 kV and an RMS on-state current of 70 A. The device supports non-repetitive surge currents up to 400 A and operates within a junction temperature range of -55°C to +125°C. Key electrical parameters include a maximum gate trigger current of 50 mA and a holding current of 80 mA. This component is suitable for resistive and inductive load control up to 400 Hz.
Feature Summary
- Back-to-back SCR configuration for bidirectional AC phase control
- ISOTOP package design offering compact volume and low thermal resistance
- Optimized for operation with resistive and inductive loads
Applications
- AC power switching for industrial equipment
- Phase control circuits for resistive and inductive loads
- High-frequency AC regulation systems up to 400 Hz
Procurement Notes
Verify the obsolete status of this specific part number before initiating procurement processes. Confirm availability through authorized distributors or approved substitute channels. Ensure that any replacement components meet the original electrical specifications and mechanical footprint requirements. Validate supplier authenticity to prevent counterfeit components. Review technical documentation for any updates regarding lifecycle management or recommended alternative series from the manufacturer.
Selection Notes
Select this module for applications requiring robust AC phase control with moderate current ratings. The ISOTOP package provides efficient heat dissipation for space-constrained designs. Consider the 1.2 kV voltage rating for medium-voltage AC systems. Evaluate the thermal management requirements based on the specified power dissipation characteristics. Ensure the gate drive circuitry can supply the required trigger current for reliable switching performance under varying load conditions.
Part Context
This component belongs to the family of discrete semiconductor thyristor modules produced by STMicroelectronics. It utilizes silicon technology to achieve high voltage blocking capabilities and current handling. The back-to-back architecture allows for full-wave control without external diode configurations. The ISOTOP packaging standardizes mounting and thermal interface solutions for industrial power electronics assemblies.
Replacement Considerations
Public confirmed substitutes include CLA100PD1200NA. Verify compatibility regarding current ratings, voltage specifications, and package dimensions when considering alternative modules.
