Product details

Solid State Automatic Transfer Switch

Features
The automatic power source switching can be performed without the need for additional control signals.
The switch used is a two normally open, two normally closed - contactless solid-state switch.
There is no sound, no sparks, and no arcing during switch on/off operations.
The power source switching is fast, with a maximum switching time of less than 20ms.
It is encapsulated in epoxy resin, providing shock resistance, moisture protection, and stable, reliable operation.
The external structure is simple, and the installation and wiring are easy, with no need to distinguish between neutral and live wires.
The product is mainly used for automatic switching of uninterruptible power supplies (UPS) for computers, instruments, and other equipment.

Specification

Specification	Value
Model	SATS-20/240 SATS-40/240 SATS-60/240 SATS-80/240 SATS-100/240
Load Power Supply	110~240VAC
Maximum Load Current	20A, 40A, 60A, 80A, 100A
On-state Voltage Drop	≤ 4.0V
Off-state Voltage	≥ 800V
Switching Time	≤ 20ms
Power Indicator	Main Power: Red LED, Backup Power: Green LED
Switching Characteristics	Contactless solid-state switch, automatic switching
Isolation Voltage	≥ 1500V
Insulation Voltage	≥ 2000V
Operating Temperature	-25°C ~ 75°C
Power Frequency	50/60Hz
Heat Dissipation	≥10A with heat sink, ≥60A with fan cooling
Load Current Safety Factor	Resistive load: 2-3 times, Inductive load: 3-4 times
Dimensions	135×61×50 mm

Tips

Additional Guidelines for Load and Installation

Margin Based on Load Type:

For resistive loads, select a current rating 2-3 times the load current.

For inductive or capacitive loads, select a current rating 3-4 times the load current.

Current Capacity Based on Environmental Temperature:

When the ambient temperature is high or the cooling conditions are poor, increase the current capacity.

Protection Against Short Circuit:

To prevent short circuits when using the load, a fast disconnect switch, quick fuse, or an overcurrent/short circuit protection solid-state switch from the SATS...-L series should be used in the load circuit.

For Inductive Loads:

A voltage-sensitive resistor (MOV) should be connected at the output to prevent internal damage to the solid-state chip from overvoltage conditions.

MOV Selection: For the 240V range, use a 430-470V MOV, or choose an overvoltage protection absorber produced by the manufacturer.

Installation Requirements:

Ensure that the contact surface between the heat sink and the product is flat and smooth.

Apply a layer of thermal conductive silicone grease on the surface of the heat sink.

Finally, tighten the screws symmetrically, after adding flat washers and spring washers, to secure the assembly.

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