MOS FET Relays
MOS FET Relay Definition
MOS FET relays are semiconductor relays that use MOS FET for their outputs.
Non-contact relays, mainly used for switching and connecting signals, are used in a wide range of applications, including semiconductor test equipment, measuring instruments, and security equipment.
MOS FET Relay Features
|Ultra-small and lightweight||SSOP, USOP and other new ultra-small packaging VSON are emerging, which contributes to miniaturization of the entire device.|
|Low drive current||The drive current is about 2 to 15mA under the recommended operating condition (normal). We also have a minimum of 0.2 mA products which contribute to energy saving of whole device.|
|Longer-life||Our MOS FET relays have a non-contact structure using an optical signal transmission method. We have achieved long durability without deterioration of life due to contact friction.|
|small leakage current||Because of its high resistance to external surges and no added snubber circuit, the leakage current is extremely small, typically 1 nA or less in the off state. (G3VM-□GR□,-□LR□,-□PR□,-□UR□)|
|superior impact resistance||Since the internal parts are completely molded and there are no mechanical parts such as movable parts, they are excellent in shock resistance and vibration resistance.|
|Quiet sound||Since there is no switching noise caused by metal contacts unlike machine relays, it contributes to noise reduction of device.|
|High insulation||Since there is no switching noise caused by metal contacts unlike machine relays, they contribute to noise reduction of device.|
|Precise control of small analog signals||Since the dead band is extremely small compared to a triac etc, the input waveform of a small analog signal is converted into an output waveform with little distortion.|
MOS FET Relay Types
Product map by MOS FET relay type
MOS FET Relay Diagram
Basic structures and operating of MOS FET relays
MOS FET relays consist of following three chips:
- LED chips
- PDA (photodiode array) chip
- MOS FET chips
MOS FET relays operate according to the following principles.
- The LED lights when the current flows to the input side.
- The light from the LED is received by the photodiode array, which generates electricity to convert the light back to a voltage
- This voltage passes through the control circuit to become the gate voltage to drive the MOS FET.
MOS FET Relay Application Examples
- Amusement equipment
paper money discrimination units, game ball and medal lending machines (interposed machine), IT equipmentApplicationstatus output, various signals