E/E Spotlight . . . Switching Devices

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• Three configurations
• Metal bushings

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These tiny and versatile switches satisfy applications in equipment for data processing telecommunications, automation, computers and peripherals, and many others. Both panel mounting and printed circuit mounting types are available, with optional threaded bushings for securing to a front panel, although most printed circuit mounting applications will specify the plain (unthreaded) bushing. Silver or gold contact material options are offered. Maximum AC/DC contact ratings for the silver contacts are 0.5 A @ 48V, and 0.4 VA @ 20V for the gold. The operating temperature range is -30° to 85°C. Contact life is 20,000 cycles/min for silver and 60,000 cycles/min for gold. Apem Components, PO Box 544, Wakefield, MA 01880. 781-246-1007. http://www.apem.com Circle 640.

Solid state relay. Compatible with existing industry-standard Japanese models and American designs, the SG series features a photo-triac coupler and can be specified with an internal zero cross circuit and/or a varistor. The device has an input voltage of 3 to 24 VDC and a load voltage range of 75-265 Vrms. Isolation is 2500 Vrms between input and output. Its single-in-line (SIL) package occupies minimal board area. Fujitsu Takamisawa America, 250 E Caribbean Dr, Sunnyvale, CA 94089. 800-380-0059. http://www.fujitsu.takamisawa.com Circle 643.

Custom panels. These custom panels with integral pushbutton switches are available for a variety of applications, including door actuation on trains and other public transport vehicles. The panels can be produced to customer specifications with flush-mounted or bezel-type switches. Large-area pushbuttons are available with raised arrows or engraved to customer requirements. EAO Switch, 198 Pepe's Farm Rd, Milford, CT 06460. 203-877-4577. http://www.eaoswitch.com Circle 644.

Current switch. The CR9321 series was developed for applications that require an on/off indication of current flow. It was specifically designed for low-cost, high-volume OEM applications of monitoring motor overloads and heater elements. The CR9321 is fully isolated to protect delicate monitoring equipment. It is also self-powered requiring no external power supply. CR Magnetics, 544 Axminister Dr, Fenton, MO 63026. 314-343-8518. http://www.crmagnetics.com Circle 645.

Electronic solenoid switch. This electronic solenoid uses solid-state circuitry to eliminate movable parts that can wear out, allowing the switch to withstand one million on-off cycles. The electronic switching mechanism eliminates problems associated with electrical arcing. The same solenoid can be used for 12 VDC and 24 VDC uses. Operating temperature range is from -40° to 85°C. Cole Hersee, 20 Old Colony Ave, S Boston, MA 02127. 617-
268-2100. http://www.colehersee.comCircle 646.

Hermetically sealed switch. The series 6600 switch is a long-life, hermetically sealed switch designed for harsh environments where extended hermetic seal integrity of the switch is critical. This switch is designed to last the life of the product for most applications, thereby reducing costs often associated with project downtime. The switch has been designed to operate below 5mA @ 28 VDC, in a temperature range betweeen 65° and 400°F. HSI, 1500 Meriden Rd, Waterbury, CT 06705. 203-756-7441. http://www.hsi-inc.com Circle 641.

Magnetic click switches. This push-button switch combines the best properties of mechanical and membrane switches. It remedies collapsing domes, teasing problems, early failure and inconsistent actuation force. In tests, the PushGate switched over 200 million actuations. The switch features a low-profile panel only one-tenth of an inch thick. It makes a "click" when pushed and released. Dura Switch Industries, 234 S Extension, Sec 103, Mesa, AZ 85210. 602-833-3131. http://www.duraswitch.com Circle 642.

Snap-in switch. This panel-mounted switch is designed for harsh and rugged environmental conditions. The series 49-9 is waterproof and splashproof, ESD resistant, and has crisp momentary action. It features a thermoplastic snap-in housing for quick and easy installation from the front of the panel. Suited for temperatures ranging up to 125°C, the switch's ESD level is rated at 15KV minimum. ITW Switches, 7301 W Ainslie Ave, Harwood Hts, IL 60656. 708-667-3370. http://www.itwswitches.com Circle 649.

Membrane touch switch. This switch is resistant to damage from pens, pencils, screwdrivers, and other sharp objects. The switch is easily actuated through a protective front surface and complies with standard specifications. The unit's durable front surface can be constructed from a variety of materials, including aluminum and stainless steel. Front surface thickness is up to 0.040-in. Monopanel Technologies, 1535 S 101st St, W Allis, WI 53214. 414-256-5200. http://www.monopanel.com Circle 650.

Solid-state relay. This plug-in relay module allows for precise heater control in plastic and metal processing. All functions can be controlled at one location through one operator interface. There are four solid-state relay outputs in a single module. Each relay controls four outputs with a total of 16 outputs from one module. All relays are rated at 4.5 amps. Syscon International, 1108 S High St, South Bend, IN 46601. 219-232-3900. http://www.syscon-intl.com/rkc Circle 647.

Time delay relay. The KRDS series is an ultra-compact, encapsulated, low cost time delay relay. It is designed for use in OEM equipment, business machines, medical and dental instruments, commercial appliances, vending machines, and process controls. It is a 10A-rated miniature SPDT relay combined with microcomputer timing and an onboard knob adjustment in a 2- x 2- x 1.2-in. molded package. SSAC, PO Box 1000 Baldwinsville, NY 13027. 315-638-1300. http://www.ssac.com Circle 648.

Multifunction switch. The RDS series of switches has dual shafts for applications requiring multiple control functions from a single input device. Housed in a lightweight and durable package, the RDS series offers versatile performance from a single compact component. Applications include portable control units used in consumer electronics, robotics, GPS systems, and light industrial equipment. Noble USA, 5450 Meadowbrook Industrial Ct, Rolling Meadows, IL 60008. 847-364-6038. http://www.nobleusa.com Circle 651.

Power entry module. This product combines an AC inlet and circuit breaker. The circuit breaker provides manual reset of the circuit, and high current limiting characteristics up to 15A. It also provides circuit status indication depending on the switch position (I/O). Current ratings for the unit range from 1 to 15A @ 250 VAC. An optional undervoltage release detects power loss and protects against unwanted restart. Schurter, PO Box 750158, Petaluma, CA 94975. 800-848-2600. http://www.schurterinc.com Circle 652.