CR3500SB

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CR3500SB is a series of thyristors, sometimes referred to as Silicon-Controlled Rectifiers (SCR). A thyristor is a 3-terminal semiconductor device with the ability to switch on or off electrical current when energized with a small current at its gating terminal. Thyristors are available in single and dual phases, with and without integral snubber passages, and have blocking voltages ranging from 400V up to 4500V and current ratings of up to 2500A.

The CR3500SB has several characteristics that make it well suited to its range of applications. For instance, it is capable of effectively controlling high-power resistive and inductive loads, and is able to maintain stable operation under a wide range of temperatures. The package can be either molded or open frame, allowing for a variety of mounting selections. The devices are also corrosion-resistant, vibration-proof, and UL-recognized.

One of the most common uses for the CR3500SB is for AC Voltage Controllers. AC controllers are used in single- and three-phase rectifier circuits to provide a soft start to resistive and inductive motors, and to protect against surges and spikes. Other applications include power supplies, UPS systems, uninterruptible power systems, and traction motor drives.

The working principle of the CR3500SB is fairly straightforward. When sufficient voltage is applied to the anode, the thyristor can be turned on, and the device will remain in its on state until the voltage is removed. If a small firing pulse is applied to the gate, a controlled amount of current will flow through the device. This current can be adjusted depending on the voltage applied to the gate by varying the width of the pulse applied.

The CR3500SB has a number of features which make it an ideal choice for voltage controllers. It can reliably operate with high frequency switching operations, and is protected against overvoltage and short circuit conditions. The device is also capable of providing fast switching times, and is immune to reverse polarity and low impedance overvoltage.

In addition to AC voltage controllers, the CR3500SB is also a suitable for current limiting and dynamic braking applications. With current limiting, custom-designed thyristors can be applied to protect against overcurrent conditions, or to reduce inrush current during start up. AC dynamic brakes can be used to decelerate and stop machinery quickly, or to speed the motor up when required.

The CR3500SB series of thyristors are a reliable and cost-effective solution for any market requiring ac voltage control. They have a wide variety of applications, including AC voltage controllers, current limiting, and dynamic braking. With their corrosion resistance, vibration proof construction, and fast switching times, the CR3500SB series is an ideal choice for just about any application.

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