Service Hours: Monday to Friday,Saturday: Guangfu Road branch only, Closed on Sundays and public holidays. For specific hours, please see details for each branch.
All marked prices are tax-inclusive and in TWD. Free shipping for purchases over 1200 (mainland Taiwan).
Language: English Centenary Materials Co., Ltd.
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Categories Centenary Materials Co., Ltd.
02 Batteries & Chargers & Spot Weldings Centenary Materials Co., Ltd.
03 Cables / Wires & Accessories Centenary Materials Co., Ltd.
05 Capacitors Centenary Materials Co., Ltd.
06 Computer Accessories Centenary Materials Co., Ltd.
07 Cable Assembly Centenary Materials Co., Ltd.
09 RF Cable & RF Antenna & Coaxial Connectors & Tools Centenary Materials Co., Ltd.
10 Multipole-Connectors & Tools Centenary Materials Co., Ltd.
11 Terminals, Test Leads & Spring Probes Centenary Materials Co., Ltd.
13 Circular & Rectangular Heavy-Duty Industrial Connectors Centenary Materials Co., Ltd.
18 Fuses & Circuit Protections Centenary Materials Co., Ltd.
21 Lighting, Lamps & Torches Centenary Materials Co., Ltd.
23 Optoelectronics & Indicators Centenary Materials Co., Ltd.
27 Power Supplies & UPS Centenary Materials Co., Ltd.
29 Relays & Solenoids Centenary Materials Co., Ltd.
30 Resistors & Potentiometers Centenary Materials Co., Ltd.
31 Discretes, TVS, Traics, SCRs & Diacs Centenary Materials Co., Ltd.
47 Soldering & Desoldering Centenary Materials Co., Ltd.
49 Inductors & Filters Centenary Materials Co., Ltd.
50 Switches & Control Gear Centenary Materials Co., Ltd.
52 Timers, Counters & Hour Meters Centenary Materials Co., Ltd.
54 MPU Programmers & Development Tools Centenary Materials Co., Ltd.
57 Logic Analysis, EPROM Programmers & IC Test Sockets Centenary Materials Co., Ltd.
58 Multimeters & Panel Meters Centenary Materials Co., Ltd.
59 Oscilloscopes, Signal Generators & Frequency Counter Centenary Materials Co., Ltd.
62 Lubricants & Greases Centenary Materials Co., Ltd.
66 Fasteners, Fixings & Snap Rivets Centenary Materials Co., Ltd.
68 Hand Tools & Kits Centenary Materials Co., Ltd.
76 Enclosures, Storage & Tool Cases Centenary Materials Co., Ltd.
80 New Products Centenary Materials Co., Ltd.
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Variable Auto-Transformers

Variable auto-transformers, also known as variacs, are specialized electrical devices used to provide a continuously adjustable AC voltage output from a fixed AC input. Unlike standard fixed-ratio transformers, these components allow users to precisely modulate the output voltage level, making them essential for laboratory testing, equipment calibration, voltage regulation, and power supply prototyping. They are commonly integrated into industrial control systems and educational environments where variable power levels are required for different operational phases. When selecting a variable auto-transformer, key considerations include the input voltage range and the maximum adjustable output voltage. The current rating is another critical parameter, as it determines the maximum load the unit can handle without overheating. Users should also evaluate the physical configuration, such as whether the unit requires a protective housing or a specific terminal arrangement for integration into a larger assembly. Proper selection ensures stability and efficiency across the desired voltage swing. Centenary Materials offers in-stock supply, fast quotation and sourcing service for parts not currently listed.
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