ZHUCO SZW26-63/D404.4 1-0-2 Three-Position Four-Pole Changeover Switch

The SZW26-63/D404.4 is a high-capacity, multi-circuit, three-position (1-0-2) rotary transfer switch. Its core features a four-section (four-layer) structure, allowing for the simultaneous control of four independent double-throw circuits, making it particularly suitable for complex scenarios requiring simultaneous switching of the main power circuit (three-phase) and auxiliary control circuits. The switch has a rated current of 63A and an insulation voltage of 690V, suitable for AC 440V/50-60Hz lines. The contact logic is as follows:
Position I: Connects the first set of four outputs (contacts 1-2, 5-6, 9-10, 13-14).
Position 0: Neutral position, all contacts are open, providing a safe isolation point.
Position II: Connects the second set of four outputs (contacts 3-4, 7-8, 11-12, 15-16).
The product uses silver alloy contacts and thickened copper conductors, resulting in a compact and reliable structure. Mechanical life is ≥300,000 cycles, and electrical life is ≥60,000 cycles (under rated load, operating frequency ≤120 times/hour).
Application Scenarios
This switch is designed for demanding industrial environments requiring simultaneous switching of multiple high-current power sources or loads, providing an integrated control solution.
Core Application: Enables simultaneous dual-circuit switching of three-phase main power + single-phase control power. For example, it can be used for "one-for-one" overall switching between two complete three-phase motor systems (including main power and associated cooling fans and controller power).
Complex System Control: Used in multi-mode switching applications requiring simultaneous changes to the main circuit (e.g., motor direction, speed) and multiple auxiliary circuits (e.g., indicator lights, brakes, lubrication), such as work mode selection in large machine tools and molding equipment.
High-Reliability Power Conversion: Used as a manual bypass switch in automatic transfer switch (ATS) systems, or in important power distribution cabinets requiring simultaneous switching of the main circuit and monitoring circuit. Widely used in power, heavy industry, mining, and large-scale automated production lines.

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PRODUCT SIZE

Internal wiring diagram

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TECHNICAL PARAMETERS

Name	Change Over Switch
Brand	ZHUCO
Model	SZW26-63/D404.4
Rated working voltage	AC440V
Rated insulation voltage	660/690V
Rated impulse withstand voltage	6kV
Conventional heateing current	63A
Rated working current	le: AC-23A: 57A; AC-3: 36A; AC-4: 15A
Rated short-time withstand current	684A/1s
Rated short-circuit making capacity	694A
Use category	AC-23A、AC-3、AC-4
Polar number	4
Meet the standards	GB/T14048.3-2017
3C Certificate Number	2024010302651148
CE testing standard	EN 60947-5-1:2017
CE Certificate number	TLZJ21072132378

About Us

Zhejiang Zhuochao Electric Co., Ltd.

Founded in 2012, Zhejiang Zhuochao Electric Co., Ltd. has been specializing in the wholesale of ZHUCO SZW26-63/D404.4 1-0-2 Three-Position Four-Pole Changeover Switch supplier. In particular, the company's ZHUCO SZW26-63/D404.4 1-0-2 Three-Position Four-Pole Changeover Switchtches feature advanced technology in the industry in the industry. Our products have obtained ISO 9001 Quality Management System Certification, National 3C Certification, TUV Certification, CE Certification and RoHS Certification, and are manufactured in strict compliance with national standards. They enjoy a strong market presence across China and are exported to numerous countries and regions in Europe, the Americas and Southeast Asia. We have also established cooperative partnerships with a number of internationally renowned brands.
Equipped with advanced production equipment and precision testing instruments, the company has introduced high-tech production processes and experienced engineers, providing support for product R&D, quality upgrading and management innovation. Thanks to the joint efforts of all employees and the strong support of domestic and overseas customers, we have accumulated rich experience in design, production and manufacturing. Currently, the company is committed to further expanding its overseas market share, and developing domestic market channels and customers. It also try to innovate marketing strategies, and build a sound market order to fully safeguard the interests of agents and customers. We unswervingly adhere to a clear market positioning, focus on two core points—technology innovation & reliable quality and marketing channel enhancement, and regard quality product, standardized market pricing and comprehensive after-sales service as three three fundamental commitments, so as to create a win-win development situation for both manufacturers and distributors.
Facing a promising future, the company will uphold the tenet of providing better products and services to satisfy customers. Relying on advanced modern enterprise management, we will deepen internal reforms, fully implement the quality assurance system, and carry forward the spirit of "Pragmatism, Integrity, Innovation and Progress". Looking ahead, we will continuously adjust the industrial structure, expand capital strength, implement the brand strategy, and march towards the global market!

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