Honeywell BZ-2RQ-A2 Overtravel Plunger Basic Switch Guide
The Honeywell BZ-2RQ-A2 basic snap action switch is a large-format MICRO SWITCH component designed for industrial control systems that depend on accurate mechanical actuation. This model is part of Honeywell’s BZ series and is identified as an SPDT chassis-mount switch with an overtravel plunger actuator, screw terminals, and an On-Mom switching function. Public technical listings show a 15 A AC current rating, 500 mA DC current rating, and 125 V AC / 125 V DC voltage capability.
What Is Honeywell BZ-2RQ-A2?
The Honeywell BZ-2RQ-A2 basic switch is used where a machine needs a clean and repeatable electrical response from physical movement. In practical engineering terms, it acts as a dependable mechanical-to-electrical interface. This makes it relevant for machine sequencing, end-of-travel confirmation, interlock feedback, and position sensing in industrial equipment. Honeywell’s BZ family is known for precise operating characteristics and long service life, which is why these switches remain common in OEM and retrofit applications.
Technical Specifications of Honeywell BZ-2RQ-A2
According to DigiKey product data, the Honeywell BZ-2RQ-A2 overtravel plunger basic switch has an operating force of 255 gf to 368 gf, a release force of 113 gf, an operating position of 1.500 in (38.1 mm), pretravel of 0.015 in (0.4 mm), differential travel of 0.002 in (0.05 mm), and overtravel of 0.219 in (5.6 mm). The listed mechanical life is 20,000,000 cycles, and the operating temperature range is -55°C to 85°C. These values make the switch suitable for repeat-cycle industrial mechanisms where stability and predictable actuation matter.
Why the Overtravel Plunger Design Matters
An overtravel plunger is useful in applications where the actuator may continue moving after the switching point is reached. That extra tolerance can help accommodate mechanical variation, linkage motion, or system movement without compromising switch function. For designers, this means the Honeywell BZ-2RQ-A2 overtravel plunger switch can be a strong fit for robust machinery where direct mechanical contact is expected and some added motion margin is beneficial.
Typical Applications
The Honeywell BZ-2RQ-A2 basic snap action switch is often considered for packaging machinery, factory automation modules, conveyor assemblies, industrial enclosures, and control systems that rely on physical position feedback. Because the BZ series supports power-duty switching as well as a wide range of actuators and electrical connections, it can be integrated into many industrial designs with relatively straightforward mounting and wiring.
Installation and Selection Considerations
When selecting the Honeywell BZ-2RQ-A2 basic switch, engineers should confirm the contact load, available actuator travel, mounting geometry, and any potential side loading on the plunger. A direct plunger switch performs best when the motion path is controlled and the installation avoids unnecessary lateral force. It is also sensible to review the complete electrical profile, especially in applications with inductive loads or frequent cycling. For more information about Honeywell, the wider switch family is worth reviewing.
FAQ
What is the Honeywell BZ-2RQ-A2 used for?
The Honeywell BZ-2RQ-A2 overtravel plunger basic switch is used for machine position detection, interlock signaling, motion-triggered switching, and end-of-travel feedback in industrial systems.
What actuator type does Honeywell BZ-2RQ-A2 have?
This model uses an overtravel plunger actuator, which is well suited to applications where motion continues after the switching point and some additional travel margin is helpful.
What electrical configuration does Honeywell BZ-2RQ-A2 offer?
It is listed as an SPDT switch with an On-Mom function, making it suitable for a wide range of control and signal applications.
Is Honeywell BZ-2RQ-A2 suitable for industrial environments?
Yes. Its operating temperature range, long mechanical life, and established BZ series construction make it appropriate for many industrial settings when the application matches its electrical and mechanical limits.
Why do engineers choose Honeywell BZ-2RQ-A2 instead of another basic switch?
Engineers often choose it for its repeatable snap action, durable construction, practical screw-terminal wiring, and motion characteristics that suit machinery where dependable mechanical switching remains the best fit.