Wide-gap ‘sugar cube’ relay in actuator application for medical beds

Application Spotlight April 2018

Innovative technical adaptations of existing and proven relay series that have been
in the market for decades often help in meeting new application requirements, while
keeping cost as low as possible.

A manufacturer of electric linear actuators used in medical beds and other applications
was looking for a drive adjustment solution, that required a low-cost relay in common
design that had to meet specific technical specs. The standard series AZ943 could meet all of these, except for the requirement of an increased contact gap
of at least 0.8 mm. ZETTLER’s engineering team delivered on this additional requirement
by facilitating a technical adjustment to the relay series.

The resulting new AZ943W series is characterized by the increased contact gap of at least 0.8 mm. The relays
are available as changeover (SPDT) and normally open (SPST). They have a switching
capacity of up to 10 A at 277 VAC or 10 A at 30 VDC at a maximum ambient temperature
of + 70 ° C. The electrical life is specified with up to 20,000 switching cycles.
For similar solutions or to discuss the wide variety of application opportunities
for the range of American Zettler relays, please contact the author.
Datasheet: AZ943W
Datasheet: AZ943 (standard version)

About American Zettler
American Zettler, Inc., a Zettler Group company, produces over fifty different types
of relays to meet the many requirements of commercial and industrial applications.
Because of their high reliability, American Zettler relays are used in a wide range
of demanding applications including telecommunication and security systems, solar
inverters and electric vehicle charging equipment, home appliances, lighting and
energy management controls, HVAC/R, industrial controls and many other types of
electric and electronic equipment. www.azettler.com.

American Zettler’s AZ2280 power relay in R290 refrigeration application

Application Spotlight February 2018

The trend in cooling applications away from refrigerants like R134a towards products like R290 continues at a fast pace. Propane-based refrigerants provide many advantages with respect to the environment, but with the significant caveat that propane is flammable. This presents challenges when using R290 around electronics.

A major player in the refrigerated vending machine industry approached American Zettler for a relay to be used in their propane-based systems. An IP67 certified seal provides engineers the safety they need to meet regulatory requirements in this application. In addition to adequate sealing, though, the relay also needed to have the flexibility to switch multiple load types.

The AZ2280 was an easy solution. With a wide range of UL ratings from general use to motor load to resistive, the workhorse AZ2280 can switch virtually any load a vending machine or refrigerated display case might require.

With an industry standard footprint, rugged Class F construction, and a 40A@277VAC rated contact, the IP67-rated AZ2280 can be used in an unlimited number of applications. For a complete data sheet, follow this link: /electromechanical-relay/az2280/.

About American Zettler
American Zettler, Inc., a Zettler Group company, produces over fifty different types of relays to meet the many requirements of commercial and industrial applications. Because of their high reliability, American Zettler relays are used in a wide range of demanding applications including telecommunication and security systems, solar inverters and electric vehicle charging equipment, home appliances, lighting and energy management controls, HVAC/R, industrial controls and many other types of electric and electronic equipment. www.azettler.com

American Zettler’s “workhorse” relay AZ576 provides solutions for switching ballast loads in street lighting project.

Relay Applications in Public and Commercial Lightning

Application Spotlight July 2017

American Zettler’s “workhorse” relay AZ576 provides solutions for switching ballast loads in street lighting project.

The lighting applications market continues to grow and diversify. The increased use of electronic ballasts requires relays to switch ever increasing inrush current and at higher voltages. In addition, designers are looking to build one circuit which meets the needs of many different countries’ system voltages.

A manufacturer of consumer and commercial lighting systems required a relay for a North American roadway lighting project. The relay needed to switch electronic ballast loads at 347VAC and 480VAC for use throughout the continent. The AZ576 was up to the challenge! Nominally rated for 20A@277VAC resistive (30K cycles, 85 C), the AZ576 successfully passed both standard and electronic ballast load testing to switch 3.7A@347VAC and 2.7A@480VAC (10K cycles, 105 C).

Beyond its suitability as a relay for the lighting industry, the AZ576 also carries ratings for: general use, pilot duty, Tungsten, HP, standard ballast, and TV. Housed in a small, industry-standard package and footprint, the AZ576 is a “workhorse” ideally suited for the needs of many applications and markets.

Datasheet: AZ576

About American Zettler
American Zettler, Inc., a Zettler Group company, produces over fifty different types of relays to meet the many requirements of commercial and industrial applications. Because of their high reliability, American Zettler relays are used in a wide range of demanding applications including telecommunication and security systems, solar inverters and electric vehicle charging equipment, home appliances, lighting and energy management controls, HVAC/R, industrial controls and many other types of electric and electronic equipment. www.azettler.com

Relay Application in Renewable Energy Heat Systems

Application Spotlight May 2017

About the renewable energy market

Trends in renewable energy applications in heating systems include the use of heat pumps that convert existing energy in soil, air or water into useable heat for living spaces. A leading manufacturer of modern heating systems required a relay for a new generation of heat pumps.  The purpose of the relay is to bypass the charging resistance in order to limit the start-up current of a motor inverter that feeds the compressor motor. The glow wire version of American Zettler’s  new AZSR131 power relay is designed to pass glow wire testing, making the relay  compliant with the requirements of IEC 60335-1 for household appliances.

About the design

AZSR131 relays have UL and TUV recognized switch ratings of 35A@277VAC at 85°C for 30K cycles. Their usage in heat pump controls demonstrates the versatile applicability of this component, which was initially   designed for use in solar inverters where the relay disconnects the inverter from the mains public grid in compliance with IEC 62109.

American Zettler continues to play a leading role in providing components solutions for New Energy markets in solar relay  and EV charging applications, among others.

Datasheet: AZSR131 series

American Zettler, Inc., a Zettler Group company, produces over fifty different types of relays to meet the many requirements of commercial and industrial applications. Because of their high reliability, American Zettler relays are used in a wide range of demanding applications including telecommunication and security systems, solar inverters and electric vehicle charging equipment, home appliances, lighting and energy management controls, HVAC/R, industrial controls and many other types of electric and electronic equipment. www.azettler.com