As electromechanical switches many times represent the only way a user will interface with a circuit you’ve designed, keeping up with the latest developments is critical. The following assortment of rockers, pushbuttons, tacts, nav switches, and many others should keep you switched on.
Offered in an SPST normally open configuration, the A9 series automotive relays from CIT Relay & Switch (Minneapolis, MN) provide a switching capacity from 3 to 40 A. Coil voltage options are 6, 12, and 24 Vdc, contact resistance is less than 50 mΩ, and max switching power is 420 W.
Featuring an integrated connector, a key switch from Cole Hersee (Boston, MA) is fully sealed with O-rings and ultrasonic welding, is rated to 10A at 12 Vdc, and is tested to SAE J259 for ignition switches.
The SW44515 potentiometer DPDT switch from Electro-Mech Components (South El Monte, CA) offers both rotary and push-on/push-off functionality plus LED backlighting. The switch is rated at 30 Vdc/120 Vac, 2.0 A (resistive), 0.5 A (inductive).
Electro-Mech’s SW44515 potentiometer switch
Rated to 20 mA at 30 Vdc, the TL3350 low-current dual-action tact switch from E-Switch (Brooklyn Park, MN) comes with or without an actuator and provides protection from exposure to the elements.
Rated to 100 mA at 24 Vdc with a life of 200,000 cycles, the IPP Series flattop plunger switch from APEM Components (Haverhill, MA) is available in momentary and maintained functions.
Engineered to replace mercury and pendulum switches, the DSA01 combination tilt/sensor switch from NKK Switches (Scottsdale, AZ) is triggered when tilted beyond ±10 of the horizontal. The SPST cylindrical switch measures 29.3 mm long and has an 11,5-mm diameter.
RoHS compliant, the 6.2 x 6.2-mm SWTW Series and SWT8 Series tactile switches from BI Technologies (Fullerton, CA) are available in side- and top-actuation versions in SMT and through-hole mounting styles.
Available in single- and double-pole versions, the HY29 Series toggle switch from Phaseda (Beaverton, OR) has UL and cUL ratings at 20 A, 125 Vac, and 2.0 hp. The RoHS-compliant switch provides a dust- and waterproof rubber boot and standard 0.250-in. quick-connect or solder-lug terminals.
The Series 56 pushbutton switch from EAO (Milford, CT) protects the switch unit independent to the force applied to the pushbutton. The switch also features a snap-action switching system that delivers tactile feedback.
Measuring 1.2 (H) x 3 (W) x 2.5 (D) mm, the B3U series SPST-NO tactile switches from Omron Electronic Components (Schaumburg, IL) are rated from 1 to 50 mA at 5 to 12 Vdc. Initial contact resistance is 100 mΩ max, and operating temperature range is 25 to 70C.
Omron’s B3U tactile switch
The DT-Series metal tactile dome contact from Snaptron (Windsor, CO) for dome switches features IntelliTac technology, allowing first contact to be made with minimal pressure applied.
Providing tactile feedback, the C08 coded output switches Elma Bustronic (Fremont, CA) offer Hex or Gray codes (custom codes are also available). The switches are available in both SMT and through-hole styles.
The Series 685B electronic vibration switch from PCB Piezotronics, IMI Div. (Depew, NY) offers two setpoints with individual alert and alarm levels. Integrating two solid-state or form C relays, the switch includes a raw vibration output signal for spectrum analysis, 4 to 20-mA output signal for overall vibration trending, and a 4 to20-mA calibration feature, allowing for precise threshold setup.
The Metal Line blue illuminated Piezo and mechanical switches from Schurter (Santa Rosa, CA) are designed for applications where lighting is dim, and indication is necessary to identify the actuation area. Optical feedback indicates the switch position (on/off).
Schurter’s Metal Line illuminated switches
Containing no mercury, the RM Series roller-ball tilt-sensor switches from Sorenson Lighted Controls (Hartford, CT) sense tilt angles and vibration via a gold-plated contact ball which breaks the circuit when a specific tilt angle is exceeded. Sensing vibration is achieved with a pulse created by the movement of the contact ball.
Measuring 27 x 27 x 24 mm and offered in a 1A or 1C footprint, the CAR Series automotive relay from Hasco Components switches 30 to 80 A. Coil voltages are 5, 6, 9, 12, and 24 Vdc, and operating temperature range is from –40° to 85°C.
The SI6432 RGB-backlit LCD switches from E3 (Grosswallstadt, Germany) feature more than 10,000 calibrated RGB colors and an extended command set. More than 100 brightness settings per color channel are available, and display resolution is 64 x 32 pixels.
Available in momentary or maintained action, the RoHS-compliant Series 39-8 snap-in miniature pushbutton switches from ITW Switches (Buffalo Grove, IL) enable a Hall-effect chip and LED to be attached to a PCB.
Offered in single-pole (RL3-6) and double-pole (YSR-34) versions, an oval rocker switch from Phaseda (Beaverton, OR) provides illumination in red, green, or amber. Standard and custom markings are available.
The 2-mm-high NL Series ultra-subminiature bicolor illuminated switch from CIT Relay & Switch (Maple Grove, MN) contains two embedded, independent LEDs that offer color combinations of red, green, yellow, blue, and white. The switch is rated to 50 mA at 24 Vdc, contact resistance is less than 50 mΩ, and insulation resistance is greater than 100 MΩ.
Rated to 50mA at 12 Vdc, the SPST normally open JS1300 navigation switch from E-Switch (Brooklyn Park, MN) provides multiposition multiswitch functionality in a single switch package. RoHS compliant, the switch operates to 100,000 cycles.
The JS1300 navigation switch from E-Switch
With a power rating up to 15 A at 250 Vac and minimum electrical life of 10,000 cycles at full load, the 2600 Series rocker switch from APEM Components (Haverhill, MA) is designed for power applications with capacitive and inductive circuits as well as common resistive circuits.
Based on rocker-style construction, the Navimec five-position switches from Sorenson Lighted Controls (Hartford, CT suit data entry or navigational controls, enabling up/down, and left/right navigation as well as and also include a center function.
Sorenson’s Navimec five-position switch
By automatically disconnecting noncritical loads from a battery when the it falls below a predefined threshold, the LVD low-voltage disconnect switch from Cole Hersee (Boston, MA) eliminates dead batteries. When battery voltage is restored, the switch automatically restores the functionality of the ancillary equipment.
Cole Hersee’s LVD switch
Ralph Raiola
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