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Unidirectional thyristor module (SCR) refers to the semiconductor components that only allow one direction of current to pass after triggering, which is equivalent to a controllable rectifier diode. It is composed of 4 layers of p-n-p-n and 3 PN junctions. It is widely used in controllable rectifiers, AC transformers, inverters and power lines.

characteristic

1. PLANAR PASSIVATION chip

2. Direct copper bonded alumina ceramic circuit

3. Pressure contact technology with high reliability

4. Short circuit fault

5. It's very strong

advantage

1. Designed for high overload and power cycle requirements

2. It has high stability in the whole life cycle

3. High surge current capability, especially for short grid spikes

application area

1. Line rectification 50 / 60 Hz

2. Soft start AC motor control

3. DC motor control

4. Power converter

5. AC power control

6. Lighting and temperature control

The basic performance of unidirectional thyristor module is shown in the figure below.
The results show that the unidirectional thyristor module can be regarded as a staggered structure of one PNP type transistor and one NPN type transistor, as shown in the figure below.
When the positive voltage is applied to the anode (a) of the unidirectional thyristor module, the triode V1 and V2 bear the positive voltage, the V2 emitter is positively biased, and the V1 collector is negatively biased. If a small positive control voltage U is applied to the control pole (g) at this time. (trigger signal), there is control current I. To the base of V1. Through amplification, the collector of V1 has the current of LC1 = b1ig flowing in. The current is sent to the base of V2 and amplified by v2. The current of LC1 = b1b2ig passes through the collector of v2. The current is then sent to the base of VI, and the two transistors are quickly turned on. After the thyristor module is turned on, the base of VI always has a much larger current than I. therefore, even if the trigger signal disappears, the unidirectional thyristor module can still guarantee the indication that the conduction mode is maintained.

The above is the introduction of the bridge arm thyristor module by the thyristor module manufacturer semipower. semipower is a power semiconductor power module supplier specialized in power electronics technology. It supplies the preparation, production and processing of power semiconductor power modules for enterprises and companies. In addition, it also supplies the processing or OEM industry for enterprises It's our business. The main products are: IGBT module power module, thyristor module (SCR) power module, ultra fast recovery epitaxial diode power module, single-phase rectifier bridge power module, three-phase rectifier bridge power module, rectifier diode power module, Schottky diode power module and other power semiconductor electronic components.