AIT offers the AVIO line of ultra precision Transistor Welders
Providing you with equipment and technical support
Lower prices on equipment and electrodes than other manufacturers
Shorter lead time, especially on electrodes
Free test welds and unparalleled customer support
Click here for matching weld heads.
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The favorite for welding micro wires and components
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Consistent and precise welding by high speed linear control
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3 Feedback modes (constant current, voltage, or power)
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High speed welding (up to 5 shots / second)
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Pre-weld check function reduces spark problems
- Simultaneous graph of voltage, current, and power wave forms

Features | MCW-700 | MCW-750 |
Maximum Current | 500A | 1800A |
Maximum Voltage | 2V | 4V |
Constant Current Mode | 10 - 500A (1A Step) | 10 - 1800A (1A Step) |
Constant Voltage Mode | 0.001 - 2V (1mV Step) | 0.01 - 4V (10mV Step) |
Constant Power Mode | 10 - 500W (1W Step) | 10 - 3600W (1W Step) |
Weld Time : Up | 0 -999 x 0.01ms or x 0.1ms | |
Weld Time : Weld | 0 -999 x 0.01ms or x 0.1ms | |
Weld Time : Down | 0 -999 x 0.01ms or x 0.1ms | |
Weld Time : Squeeze&Hold | 9.99s (maximum) | 9.99s (maximum) |
Pre-Check | Resistance/Current | Resistance/Current |
Shot / Sec | 5shots / sec: 500W 2ms | 5 shots / sec : 3600W 2ms |
Monitor : Wave Form | Current / Voltage / Power | Current / Voltage / Power |
Monitor : Current | Average / Peak | Average / Peak |
Monitor : Voltage | Average / Peak | Average / Peak |
Monitor : Power | Average / Peak | Average / Peak |
Number of Conditions | 15 | 15 |
Interface | RS-232, I/O, analog output | RS-232, I/O, analog output |
Power Source (Option) | 100-120V AC (200-240V AC) | 100-120V AC (200-240V AC) |


Transistor welders are also known as Linear DC welders. In a transistor welder, energy is stored up in capacitors and released through transistors. This produces a result similar to the high frequency inverter power supplies. The output is in the form of clean square waves with very fast rise time. The transistor welders made by AVIO are closed loop designs, utilizing transistor controlled feedback with extremely fast response time, which are able to monitor the condition of the weld using one of three feed back modes, "constant current", "constant voltage", or "constant power". These feedback modes offer great advantages such as better process consistency between multiple weld stations, reduced number of bad welds, and real time automatic adjustment for variations in part thermal loading and plating. Linear DC welders do not use a transformer. These power supplies have the best low energy control, making them the favorite for welding micro wires and then foils. The major limitation is that the duty cycle is typically much less than one weld per second.
The Avio welders we are offering here are premium quality Japanese made welders. We stand by these welders and guarantee our customers support and assistance when you buy an Avio welder from us. All electrodes are manufactured by AIT in our facility in the United States. We can respond quickly to your inquiries or questions.

SUNSTONE LINEAR DC WELDERS
Sunstone Linear DC Welder

LDC 1500W | LDC 3000W | |||
Nominal Line Voltage (Single Phase)
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90-264 AC Version
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180-264V
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Duty Cycle
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4%
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8%
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Current |
10A -2500A 10 Amp/Step
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10A -2500A 1 Step
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Voltage |
0.1V - 10.0 V at 10 mV/Step
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0.1V - 10.0 V at 10 mV/Step
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Power |
0.01kW - 20kW 10Watt/Step
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0.01kW - 20kW 10Watt/Step
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Peak Current
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2500 A
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2500 A
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Peak Voltage
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10V
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10V
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Peak Power
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20kW
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20kW
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Weld Period Ranges
weld time (each section)
Squeeze/Hold Periods
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Ranges (msec)
0-100
0-5
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Resolution (steps)
0.1 ms
1 ms
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Ranges (msec)
0-100
0-5
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Resolution (steps)
0.1 ms
1 ms
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Current Output Accuracy
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±10A
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±10A
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Voltage Output Accuracy
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± 0.005V
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± 0.005V
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LxWxH
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15.2x11.4x15.5in (38.5x28.9x39.3cm)
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15.2x11.4x15.5in (38.5x28.9x39.3cm)
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Weight
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46.5 lbs (21.1kg)
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46.5 lbs (21.1kg)
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Sunstone DC-5 Welder

DC Mode
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TCB Electrode Pk Current Max
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400A (500A w/ Larger Cabling)
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TCB Electrode Pk Current Min
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8A (5A w/ Smaller Cabling)
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Weld Speeds
DC Mode | |
Rep Rate
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35 welds/min @ 5v 100ms
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Rep Rate
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190 welds/min @ 2v 50ms
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Weld Pulse Characteristics
DC Mode | |
Min Output
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0.1V
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Max Output
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5V
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Pulse Width Min
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0.5 m
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Pulse Width MaX
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500 ms
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Rise Time (to Max Voltage)
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1μs
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Minimum Resistance
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8 mOhm
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DC 5v | ||
Inches | cm | |
Height | 8 |
20.3
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Width |
8.5
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21.6
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Depth |
11
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28
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Weight |
17 lbs
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8 kg
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