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Teccor® brand Thyristors Thyristor Product Descriptions Product Packages Quality and Reliability Assurance V-I Characteristics of Thyristor Devices Electrical Parameter Terminology Legal Disclaimers Lead Form Dimensions Fundamental Characteristics of Thyristors Gating, Latching, and Holding of SCRs and Triacs Phase Control Using Thyristor Mounting and Handling of Semiconductor Devices Surface Mount Soldering Recommendations Thyristor and Rectifier Testing Using Curve Tracers Thyristors Used as AC Static Switches and Relays Explanation of Maximum Ratings and Characteristics Miscellaneous Design...

Teccor® brand Thyristors Surface Mount Through Hole Surface Mount High Energy static dv/dt SIDACs Kxxxzy Through Hole Average forward current Peak non-repetitive surge current I2t Value Storage for temperature fusing range single half cycle; f = 50Hz; single half cycle; f = 60Hz; © 2014 Littelfuse, Inc. Littelfuse, Specifications are subject to change without notice. Specifications, descriptions and illustrative material in this literature are as accurate as known at the time of publica

Teccor® brand Thyristors Thyristor Product Descriptions Thyristors A Thyristor is any semiconductor switch with a bi-stable action depending on p-n-p-n regenerative feedback. Thyristors are normally two- or three-terminal devices for either unidirectional or bi-directional circuit configurations. Thyristors can have many forms, but they have certain commonalities. All Thyristors are solid state switches that are normally open circuits (very high impedance), capable of withstanding rated blocking/off-state voltage until triggered to on state. When triggered to on state, Thyristors become a low-impedance...

Teccor® brand Thyristors Thyristor Product Descriptions (continued) Because of its unidirectional switching capability, the SCR is used in circuits where high surge currents or latching action is required. It may also be used for half-wavetype circuits where gate-controlled rectification action is required. Applications include crowbars in power supplies, camera flash units, smoke alarms, motor controls, battery chargers, and engine ignition. Surge current ratings are available from 30 A in the TO-92 packaging to 950 A in the TO-218X package. DIAC voltage provide trigger pulses closely matched...

Expertise Applied | Answers Delivered Teccor® brand Thyristors Product Packages Specifications are subject to change without notice.

Teccor® brand Thyristors Product Packages (continued) Isolated Mounting Tab © 2014 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 12/14/14 Package Code

Teccor® brand Thyristors Quality and Reliability Assurance Littelfuse Quality Policy Littelfuse is committed to being sensitive to customer expectations and providing quality products and services at a competitive price. In support of this commitment, Littelfuse will: • Encourage quality awareness and quality performance in all associates at all levels of the company through management leadership; • Promote the participation of all associates in making individual contributions to the quality improvement process; • Support continuous quality improvements by providing our associates with necessary...

Teccor® brand Thyristors Quality and Reliability Assurance (continued) Only those products which pass tests designed to assure Littelfuse’s high quality and reliability standards, while economically satisfying customer requirements, are approved for shipment. All new products and materials must receive approval of QRA prior to being released to production. The combination of reliability testing, process controls, and lot tracking assures the quality and reliability of Littelfuse’s Reliability Stress Tests The following table contains brief descriptions of the reliability tests commonly used in...

Teccor® brand Thyristors V-I Characteristics of Thyristor Devices +I Voltage Drop (vT) at Specified Current (iT) Off-state Leakage Current – (IDRM) at Specified VDRM Minimum Holding Current (IH) Specified Minimum Off-state Blocking Voltage (VDRM) Characteristics of SIDAC Device with Negative Resistance +I Specified Minimum Off - State Blocking Voltage (VDRM) Specified Minimum Reverse Blocking Voltage (VRRM) Off - State Leakage Current - (IDRM) at Specified VDRM Minimum Holding Current (IH) Reverse Breakdown Voltage Reverse Leakage Current - (IRRM) at Specified VRRM Characteristics of Triac Device...

Teccor® brand Thyristors Electrical Parameter Terminology Diode Rectifiers di/dt (Critical Rate-of-rise of On-state Current) - Maximum value of the rate-of-rise of on-state current which a Thyristor can withstand without deleterious effect. RθJC (Thermal Resistance, Junction-to-case) - Temperature difference between the Thyristor junction and the Thyristor case divided by the power dissipation causing the temperature difference under conditions of thermal equilibrium. dv/dt (Critical Rate-of-rise of Off-state Voltage or Static dv/dt) - Minimum value of the rate-of-rise of principal voltage which...

Teccor® brand Thyristors Legal Disclaimers Liability Littelfuse, Inc. its affiliates, agents, and employees, and all persons acting on its or their behalf (collectively, “Littelfuse”), disclaim any and all liability for any errors, inaccuracies or incompleteness contained here or in any other disclosure relating to any product. Littelfuse disclaims any and all liability arising out of the use or application of any product described herein or of any information provided herein to the maximum extent permitted by law. The product specifications do not expand or otherwise modify Littelfuse terms...

Teccor® brand Thyristors Lead Form Dimensions Lead Form Dimensions The TO-218, TO-220AB, and TO-92 package configurations, because of their unique design, can be mounted in a variety of methods, depending upon heat sink requirements and circuit packaging methods. Any of the derived types shown in this section are available as standard parts direct from the factory. Custom package variations are available. Consult the factory for more information. To designate lead form options, simply indicate the type number at the end of the Teccor standard part number. Example: Q4008L465 (Signifies Type 65)...