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MICROSWITCHES

MICROSWITCHES
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MICROSWITCHES

Product catalog summary
Introduction
Cherry snap switches and keyboards, manufactured by ZF Electronics GmbH, are recognized for their quality and reliability in various applications such as household appliances, industrial uses, and vehicles. The company complies with ISO 9001, TS 16949, and ISO 14001 standards for quality assurance and environmental management.
Philosophy
Cherry's philosophy focuses on perfection in detail and optimal component integration, aiming to be an active partner in product development to ensure reliability and innovation.
Location and Quality
Founded in the USA in 1953, Cherry Electrical Products Corporation has expanded globally with subsidiaries in Germany, England, France, and the Czech Republic. The company emphasizes close cooperation with customers to ensure high-quality products and quick responses to regional needs.
Growth, Innovation, and Environment
Cherry's growth strategy prioritizes quality, innovation, and environmental responsibility. An integrated management system is implemented to exceed customer and environmental standards, involving employees in environmental policy development and maintaining open communication with stakeholders.
Products
Cherry offers a wide range of switches, including snap switches, sliding contact switches, and key modules, as well as electronic controls, mechatronic assemblies, sensors, and rocker switches to meet various technical demands.
Technical Details and Lexicon
The document provides detailed technical specifications for snap switches, including actuator positions, forces, and travel distances, explaining the function of different terminals and the importance of contact gaps and clearance distances for safety and performance.
Specifications and Conversions
Specifications for operating forces of switches are provided in centiNewtons (cN) with conversion formulas to grams-force (gf). For example, 250 cN is equivalent to 254.93 gf, with reconversion formulas from gf to cN also provided.
Operating Life
Operating life is defined by the number of switch cycles under specific conditions, influenced by factors such as switched current, voltage, load type, actuator type, speed, frequency, and environmental conditions. Mechanical life is tested without electrical load, while electrical life depends on contact material and load conditions.
Temperature and Vibration Resistance
Switches operate within specified temperature ranges, and exceeding these can affect reliability. They are resistant to shocks and vibrations, with specific resistance values provided.
Electrical Characteristics
Electric strength exceeds 1500 V AC for certain models. Contact bounce and transit times are specified, with typical bounce times between 1.5 and 3 ms.
Contact Materials
Gold and silver alloys are used for different applications, with gold suitable for low currents and silver for heavier loads. The choice of material depends on various factors, and field trials are recommended.
Materials and Fire Resistance
Switches are made from high-quality, cadmium-free plastics, with most materials being self-extinguishing and compliant with UL 94 V0 standards. Tracking resistance and RoHS compliance are also addressed.
Approvals and Protection
Switches have various approvals, including ENEC and UL, and are rated for different degrees of protection (IP00 to IP67) against solid objects and water ingress.
Installation Guidelines
Proper installation by trained staff is emphasized, with specific torque values for screws and recommendations for avoiding pre-stressed actuators. Cleaning agents and solvents should be used cautiously.
Order Codes and Preferred Parts
Order codes for snap switches and keymodules are explained, with preferred parts listed for high availability and flexible order quantities.
Overview of Switch Types
The document provides detailed technical specifications and ordering information for various types of switches, including general-purpose, miniature, subminiature, subsubminiature, ultraminiature, center-off, and pushbutton switches. It outlines the features, dimensions, electrical ratings, and materials used in the construction of these switches.
Specifications of Switch Types
Each switch type is described with its size, switched current and voltage, operating force, actuator travel, and ambient temperature range. For example, general-purpose switches have a range of 0.1-30.1 A and 250 V AC, with operating forces between 425-1280 cN.
Materials and Construction
The document details the materials used in switch construction, such as phenolic housing, thermoplastic nylon actuators, and various terminal materials like brass and silver-plated copper. It also mentions the flammability rating and optional high-temperature models.
Electrical Ratings and Life
The switches are rated according to EN 61058-1 and UL 1054 standards, with electrical life ranging from 6,000 to 50,000 operations depending on the model and load. Mechanical life can reach up to 10 million operations.
Features and Approvals
The switches offer features like self-cleaning contacts, various actuator styles, and terminal types. They are approved according to international standards, ensuring reliability and safety.
Technical Drawings
The document includes technical drawings with dimensions and mounting instructions for different switch models, providing precise installation guidance.
Applications
These switches are used in various industries, including white goods, due to their precision, reliability, and adaptability to different environmental conditions.
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Catalog excerpts

MICROSWITCHES-1

Perfection down to the smallest detail

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MICROSWITCHES-2

CONTENTS For many years, Cherry snap switches and keyboards have been synonymous with quality and reliability. Cherry is a trademark of ZF Electronics GmbH, a leading supplier of electronic components. Whether in household appliances, industrial applications, vehicles or input systems, electronic components ensure reliable operation as well as safety and comfort. Our Quality Assurance System is ISO 9001 and TS 16949- certifi ed and our Environmental Management is ISO 14001-certifi ed. In our experience you need a little advice to get the best out of your switches. This is why we always start...

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MICROSWITCHES-3

Philosophy 4 Location and quality 6 Growth, innovation and environment 8 Products 10 Lexicon 12 Overview 22 Snap switches 24 Sliding contact switches 62 Keymodules 66 Check list for switch requirements 72 Winner 2005 Lean Production Award 2006 Bavarian Quality Award 2008 Kaizen 5S Award 2009 3

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MICROSWITCHES-4

PHILOSOPHY What makes the difference between a good and an excellent technical solution? Reliability, the power of innovation, these are the foundations of success. But how can success be achieved? Is there a formula which can be transferred to all industries? We think there is. The quality of a total solution is determined by the quality of its components. A fault in a component which only costs a few cents can paralyse everything. Perfection down to the smallest detail is therefore the basis of our philosophy as a supplier of mechatronic components. Another is attuning the individual elements...

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MICROSWITCHES-6

LOCATION AND QUALITY Customer satisfaction grows with quality. And quality with closeness to the customer. With ever-shorter product cycles, the development time for new products is also being reduced. In order to guarantee maximum quality, close cooperation among all partners is important. We interpret the term “close cooperation” in an old-fashioned way – and wherever possible, we prefer personal contact with our partners. 6

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MICROSWITCHES-7

To be as close to our customers as possible was the principle of Cherry Electrical Products Corporation, which was founded in the USA in 1953. In 1964 we established a subsidiary in Germany and in 1972 in England. Additional European subsidiaries followed in France and Czech Republic in 1985 and 1992, respectively. Today, the company acts on a global basis – with sites throughout the world: in North America and Europe as well as in Asia and Australia. Proximity on location allows us to react quickly to regional or individual requirements. We continue this philosophy while integrating the Cherry...

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MICROSWITCHES-8

GROWTH, INNOVATION AND ENVIRONMENT Customer satisfaction grows by quality. And quality by closeness to the customer Growth and success across more than 50 years are no accident, but the result of a sustainable company strategy. A strategy which is applied equally to customers, employees, our own products and the environment. This guarantees that our innovations will fall on fertile ground in the long and short term – and it will ensure growth for us and our partners. Quality and environment For us, environmental consciousness is more than the fulfi llment of a duty; we live it every day. Therefore,...

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MICROSWITCHES-9

Principles of environmental protection Cherry products are contributing to the technical progress on a global basis. However, this also means that the company has a responsibility to continuously improve the environmental compatibility of its products over their entire life cycle and to reduce the strains placed on natural resources. The Environmental Policy is checked regularly and is binding for all employees. It is based on the following principles: 1. We design our products and production processes in as energy and resource-effi cient a manner as possible. We use state-of-the-art environmentally...

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MICROSWITCHES-10

PRODUCTS Diversity generates options. Options result in exactly solutions for your requirements. Higher, faster, further – the demands for technical developments are increasing, while their size is being reduced. A challenge also for the engineers of the individual components. To fulfi ll both the requirements and the unusual demands of our partners, we have created a broad spectrum of switches. Decades of experience in the development and manufacture of switches equates to the best solution for your application. The following pages present a detailed overview of our ranges, which are divided...

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MICROSWITCHES-11

From single components to electronic assemblies Mechatronics Experience our competence concerning control units and electronic assemblies – from cooktops and fl ow-heaters to many other applications. Sensors Get informed about our standard program of sensors based on Halland Reed-technology. Rocker switches Our rocker switch range covers device switches to be used for example in household appliances and power tools as well as for machinery and equipment. Key modules Read up on our key modules enabling fl exible design of keypads and keyboards. Depending on the key cap, different lead spacings...

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MICROSWITCHES-12

Actuator Applying force to the actuator of a snap switch releases the snap-action mechanism, which in turn triggers the switching operation. Auxiliary actuator It is possible to attach an auxiliary actuator to a snap switch in order to meet the specifi c requirements of a given application. Doing so usually alters the travel and forces involved in the switching operation, depending on the length of the levers. By attaching an appropriate auxiliary actuator, it is possible to increase travel and/or reduce the actuating force required. Terminals COM (Common = 1): Base terminal NC (Normally Closed...

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MICROSWITCHES-13

Auxiliary actuator Actuator Silver- or “GoldCrosspoint” Contact NC-terminal (2) NO-terminal (4) COM-terminal (1) Graphical symbols Description Function Graphical S.P.D.T. Single Pole Double Throw (Changeover contact) In rest position the COM terminal is connected to the NC contact. When the actuator is depressed, COM and NC break contact and COM and NO make contact. S.P.S.T. - N.O. Single Pole Single Throw Normally Open (Make contact) When the switch is actuated, contact is made. S.P.S.T. - N.C. Single Pole Single Throw Normally Closed (Break contact) When the switch is actuated, contact is broken....

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*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.