Content last revised on January 16, 2026
M50100THC1600-8700 SanRex Three-Phase Half-Controlled Thyristor Bridge Module | 1600V 100A Power Solution
The M50100THC1600-8700, a precision-engineered Thyristor/Diode Module from SanRex (Sansha Electric), is designed to provide high-efficiency power rectification and phase control for heavy-duty industrial applications. By integrating three thyristors and three diodes into a Three-Phase Half-Controlled Bridge configuration, this module allows engineers to manage 100A of average rectified current while maintaining a high 1600V repetitive peak off-state voltage. Its robust design is optimized for environments where thermal stability and high-voltage isolation are non-negotiable requirements for system longevity. For industrial battery chargers requiring high-side phase control on a 480V line, the 1600V rated M50100THC1600-8700 is the optimal choice.
Key Parameter Overview
Decoding Technical Specifications for Enhanced System Reliability
To support rigorous engineering evaluations, the following technical data represents the operational boundaries and electrical characteristics of the M50100THC1600-8700. These figures are critical for calculating thermal margins and safety factors in high-power circuit design.
| Critical Specification | Value / Performance Metric |
|---|---|
| Repetitive Peak Off-State Voltage (VDRM) | 1600V |
| Average Rectified Output Current (Io) | 100A (Three-Phase Full Wave) |
| Surge On-State Current (ITSM) | 1200A (60Hz, 1 cycle) |
| Isolation Breakdown Voltage (Visol) | 2500V AC (1 minute) |
| Operating Junction Temperature (Tj) | -40°C to +125°C |
| Mounting Torque (Terminal/Mounting) | 4.7 N·m / 4.7 N·m |
Application Scenarios & Value
Achieving System-Level Efficiency in Phase-Controlled Rectification
The M50100THC1600-8700 excels in Variable Frequency Drive (VFD) front-ends and industrial heating controllers. A common challenge for engineers is managing the inrush current and voltage regulation in large UPS systems. The thyristor-diode hybrid topology allows for a controlled soft-start of the DC-link capacitor, effectively eliminating the need for bulky external resistors and mechanical contactors. This integration significantly improves the Power Density of the overall system.
In high-power industrial scenarios, such as Welding Power Supply units or electroplating rectifiers, the 1600V blocking capability provides a necessary safety margin against line voltage transients and inductive kickback. The module's 2500V AC isolation ensures that the control circuitry remains safe from the high-power AC mains, adhering to strict industrial safety standards. For systems requiring a simpler non-controlled rectification path, the M50100TB1600 offers a full diode bridge alternative within the same physical footprint.
Technical Deep Dive
Engineering the Half-Controlled Topology for Thermal Longevity
The internal architecture of the M50100THC1600-8700 utilizes a hybrid configuration where the high-side switches are thyristors and the low-side are diodes. This specific arrangement is a strategic choice for engineers who require phase-controlled regulation without the complexity of a full six-thyristor bridge. One of the most significant engineering advantages here is the reduction in Gate Drive requirements; you only need to control three SCRs instead of six, simplifying the isolation and timing logic.
From a Thermal Management perspective, the module utilizes a high-conductivity copper baseplate that minimizes the thermal resistance between the junction and the heatsink. Understanding why Rth matters is essential when designing for continuous 100A operation, as heat dissipation is the primary bottleneck in power module lifespan. Think of the Thermal Resistance like a bottleneck in a water pipe; the smaller the resistance, the faster the heat "flows" away from the sensitive silicon, preventing catastrophic failure during current surges. This module's design ensures that even during a 1200A surge event, the junction temperature remains within safe limits if properly heatsinked.
FAQ
Addressing Practical Engineering and Integration Challenges
- How does the 1600V VDRM rating affect the reliability in 480V AC line systems?
In 480V systems, peak line voltage is approximately 678V. The 1600V rating of the M50100THC1600-8700 provides more than double the peak voltage protection, creating a robust safety buffer against spikes often caused by IGBT failure in neighboring motor drives or inductive load switching. - What is the benefit of the 2500V isolation voltage (Visol) for HMI design?
The 2500V isolation ensures that the metal casing of the industrial machine remains at ground potential even if the module is operating at high line voltages. This is critical for systems utilizing a medical HMI or industrial touchscreens where user safety is the highest priority. - Can this module handle high-frequency switching for phase control?
The M50100THC1600-8700 is optimized for line-frequency phase control (50Hz/60Hz). While it handles high current with ease, engineers looking for high-frequency PWM switching should consult our guide on IGBT vs MOSFET selection to determine if a thyristor-based module is suitable for their specific switching speed requirements.
The strategic deployment of the M50100THC1600-8700 allows for a significant reduction in component count in phase-regulated rectifiers. By consolidating 1600V thyristors and diodes into a single, thermally optimized package, SanRex enables engineers to build more compact, reliable, and cost-effective industrial power stages. What is the primary benefit of its hybrid design? It simplifies gate control while maintaining precise 100A output regulation. Is it suitable for harsh environments? Yes, the wide temperature range and high surge current capability make it a staple for heavy machinery and VFD input protection.