Sanghvi Electronics

Features:

• Part Number: MCC501‑16IO2
• Manufacturer: IXYS (now part of Littelfuse)
• Device Type: Dual SCR (thyristor) module
• Configuration: Two SCRs in a half‑bridge (phase‑leg) arrangement
• Package: WC‑501 chassis‑mount power module
• Technology: Silicon Controlled Rectifiers (SCR) with high surge capability

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General Overview

• Part Number: MCC162‑16IO1
• Manufacturer: IXYS (Littelfuse / IXYS‑Electronics)
• Module Type: Dual SCR (thyristor) + diode phase‑leg power module
• Topology: Series SCR & diode forming a half‑bridge rectifier leg
• Package Style: Y4‑M6 chassis mount industrial module

Commonly used in AC→DC controlled rectifiers, phase‑angle power controllers, soft starters, etc., where line‑frequency control (50/60 Hz) is required.

Electrical Characteristics

• Repetitive Peak Off‑State Voltage (VDRM / VRRM): 1600 V
• Isolation Test Voltage: Typically high (module isolation ≥4000 V AC)

Current Ratings

• Average Forward Current (IT(AV)) ≈ 180–200 A (TC = 85 °C typical)
• RMS On‑State Current (IT(RMS)) ≈ ~300 A
• Non‑Repetitive Surge Current (ITSM): ~6000–6400 A (10 ms pulse)

SCR + Diode Pair Behavior

The MCC162‑16IO1 module includes:

SCR (Thyristor)

• Controlled switch: conducts when forward‑biased and a gate trigger is applied.
• Once triggered, remains on until current falls below holding value (e.g., AC zero crossing).
• Gate Trigger Voltage (VGT max): ~2.5 V typical.
• Gate Trigger Current (IGT max): ~150 mA typical.
• Holding Current (IH): ~100–200 mA.

Freewheeling Diode

• Provides the return current path for the complementary half cycle.
• Reduces power dissipation by allowing current to continue flowing when SCR is off.

This SCR + diode pair forms the basic element for controlled rectification — each pair can be used in multi‑phase rectifiers by connecting multiple modules.

Thermal & Mechanical Details

• Operating Junction Temperature (TJ): −40 °C to +125 °C
• Thermal Resistance (junction‑to‑case): ~0.14–0.16 K/W
• Thermal Resistance (case‑to‑heatsink): ~0.05–0.08 K/W

Mechanical Package

• Package: Y4‑M6 chassis mount module with screw/bolt terminals
• Baseplate: Electrically isolated for mounting to heatsinks
• Dimensions: ~94 × 34 × 30 mm (approx.)

The module’s isolated baseplate makes thermal management easier when mounting to heatsinks or power chassis.

Functional Operation 

• Triggering: Gate trigger when SCR is forward biased
• Turn‑off: Occurs only when current drops below holding current (natural AC zero crossing)
• No active turn‑off like IGBTs or MOSFETs.

Diode (Freewheel Path)

• Allows current to flow during periods when the SCR is not conducting, reducing ripple and stress on components.

 

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General Overview

• Part Number: MCC200‑16IO1
• Manufacturer: IXYS (part of Littelfuse / IXYS‑Electronics)
• Module Type: Dual thyristor (SCR) power module
• Topology: Two SCRs in series (half‑bridge) configuration
• Package: Y4‑M6 chassis mount industrial module

Used where controlled AC power conversion and rectification is needed, typically at line frequency (50/60 Hz).

Electrical Specifications �� Voltage & Current Ratings

• Repetitive Peak Off‑State Voltage (VDRM / VRRM): 1600 V
• Average Forward Current (IT(AV)) (TC = 85°C): 216 A
• RMS On‑State Current (IT(RMS)): 340 A max
• Surge On‑State Current (ITSM): ≈ 8000 A (50 Hz) / 8600 A (60 Hz)

SCR Triggering

• Gate Trigger Voltage (VGT max): ~2 V
• Gate Trigger Current (IGT max): ~150 mA
• Holding Current (IH max): ~150 mA

✔ The SCR is triggered (turned on) by a small current into the gate, and remains on until current drops below holding value (e.g., at AC zero crossing).

Thermal & Mechanical Characteristics

• Operating Junction Temperature (TJ): –40 °C to +125 °C
• Thermal Resistance (junction‑to‑case): ~0.13 K/W
• Thermal Resistance (case‑to‑heatsink): ~0.05 K/W
• Mounting: Chassis mount with screw/bolt terminals
• Package: Robust Y4‑M6 module with isolated baseplate for easy heatsinking

The isolated baseplate simplifies integration into heatsinks in industrial equipment.

Functional Description

• Controlled switch: Turns on when forward biased and a gate pulse is applied.
• Latches on: Remains conducting until current falls below the holding level (natural AC zero crossing).
• Turn‑off: Occurs only when current goes to zero; no active turn‑off like IGBTs.

Module Topology

• Two thyristors arranged in a half‑bridge or series connection to handle high voltage and high current in controlled rectifier circuits.
• Suitable for controlled conversion of AC to DC or AC power control by phase‑angle firing.

Typical Applications

The MCC200‑16IO1 module is commonly used in:

• Controlled AC to DC rectifiers
• Soft‑start AC motor controllers
• Industrial power regulator systems
• Lighting and temperature power control
• DC motor drives with phase control
• Industrial converters and power supply systems

These applications benefit from SCR’s ability to control average output power via firing angle adjustment.                                                                                                                                                                                                                         

General Description

The MCC312-16IO1 is a dual SCR power module manufactured by IXYS (now part of Littelfuse). The module contains two SCR devices connected in a series/half-bridge configuration, optimized for high-power switching and phase-controlled rectification.

It is built using planar passivated thyristor chips mounted on a direct-bonded copper (DBC) ceramic substrate, providing high electrical isolation and excellent thermal conductivity.

The module is typically mounted on a heatsink with chassis mounting to dissipate heat generated during operation.