• C106DG TO-225AA
C106DG TO-225AA


SCR 400V 4A(RMS) 20A 3-Pin(3+Tab) TO-225 Box


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Overview of C106DG

The C106DG is a sensitive gate silicon controlled rectifier (SCR) designed for use in small signal switching applications. This SCR features a low gate trigger current, making it suitable for low-power control circuits where precise switching is required.


(Note: The pin configuration below is a general representation. Refer to the specific datasheet for precise details.)

  • MT1: Main Terminal 1
  • MT2: Main Terminal 2
  • G: Gate

Circuit Diagram

Include a circuit diagram to demonstrate the connection and operation of the C106DG SCR for better understanding of its application.

Key Features

  • Sensitive Gate SCR: The C106DG is designed as a sensitive gate SCR, allowing for precise control in small signal applications.
  • Low Gate Trigger Current: This SCR requires a low gate trigger current for activation, ensuring efficient switching in low-power circuits.
  • High Surge Current Capability: With its high surge current capability, the C106DG can handle sudden spikes in current without damage.
  • Low Holding Current: The SCR maintains a low holding current once triggered, minimizing power dissipation in the circuit.
  • Compact TO-126 Package: Packaged in a TO-126 form factor, the C106DG offers easy mounting and thermal dissipation.

Note: For detailed technical specifications, please refer to the C106DG datasheet.


  • Dimmer Circuits: Ideal for use in dimmer circuits for lighting control where smooth switching is required.
  • Motor Control: Suitable for small motor control applications where precise and reliable switching is essential.
  • Temperature Control: Used in temperature control systems for accurate regulation of heating elements.


The C106DG is a sensitive gate SCR that provides reliable switching in low-power applications, offering precise control over connected loads for various control applications.

Usage Guide

  • Gate Connection: Connect the gate terminal (G) to the triggering circuit with the required gate current for SCR activation.
  • Main Terminals: Connect the MT1 and MT2 terminals in series with the load to be controlled.
  • Triggering Voltage: Apply the appropriate triggering voltage to the gate terminal to switch the SCR ON.

Frequently Asked Questions

Q: Is the C106DG suitable for high-speed switching applications?
A: The C106DG is designed for small signal switching applications and may not be suitable for high-speed switching requirements.


For similar functionalities, consider these alternatives to the C106DG:

  • MAC97A6: A sensitive gate TRIAC offering similar characteristics to the C106DG for AC switching applications.
  • BT169D: This is a logic-level TRIAC with sensitive gate characteristics suitable for low-power switching circuits.



The followings are basic parameters of the part selected concerning the characteristics of the part and categories it belongs to.

Rohs Code Yes Part Life Cycle Code Active
Ihs Manufacturer LITTELFUSE INC Package Description LEAD FREE, CASE 77-09, 3 PIN
Reach Compliance Code not_compliant ECCN Code EAR99
HTS Code 8541.30.00.80 Samacsys Manufacturer LITTELFUSE
Additional Feature SENSITIVE GATE Case Connection ANODE
Configuration SINGLE DC Gate Trigger Current-Max 0.2 mA
JEDEC-95 Code TO-225AA JESD-30 Code R-PSFM-T3
Number of Elements 1 Number of Terminals 3
Package Body Material PLASTIC/EPOXY Package Shape RECTANGULAR
Package Style FLANGE MOUNT Peak Reflow Temperature (Cel) NOT SPECIFIED
Qualification Status Not Qualified RMS On-state Current-Max 4 A
Repetitive Peak Off-state Voltage 400 V Repetitive Peak Reverse Voltage 400 V
Surface Mount NO Terminal Form THROUGH-HOLE
Terminal Position SINGLE Time@Peak Reflow Temperature-Max (s) NOT SPECIFIED
Trigger Device Type SCR

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