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Overview

MICRO SWITCH BS Series Large Premium Switch, Single Pole Double Throw Circuitry, 15 A at 250 Vac, Pin Plunger Actuator, Solder Termination, Environmentally Sealed.
MICRO SWITCH BS Series switches offer alternatives to solve challenging switch applications. These unique solutions can provide adjustable operating characteristics, sequential outputs, or impact actuation (no external plunger).
4BS3 Specialty Large Basic Switches - Honeywell

Technical Specifications

Switch Type MICRO SWITCH Standard 25,15 mm H x 17,45 mm W x 49,28 mm L [.99 in H x .687 in W x 1.94 in L]
Ampere Rating 15 A
Sealed Environmentally
Circuitry SPDT
Actuator Pin Plunger
Termination Solder
Voltage 250 Vac
Contact Type Silver
Operating Force (OF) 40 gf max.
Release Force 20 gf min.
Material Plastic
Housing Material General Purpose Phenolic
Agency Approvals and Standards UL, CSA
Mounting Screw Size 3,53 mm [0.139 in]
Mounting Centers 25,4 mm [1 in]
Tightening Torque 0,33 N m [3.0 in lb]
Weight 226,8 g [0.50 lb]
Package Height 24,1 mm [0.95 in]
Package Width 17,5 mm [0.69 in]
Package Length 49,3 mm [1.94 in]
Recommended For Adjustable Deadbreak Wheel on top of switch to change the air gap. Dial in OP, RP, and DT. "G" Load 5-8 grams
Comment Operating characteristics measured at minimum settings
Availability Global
Series Name BZ/BA/WA/YZ

Technical Specifications

Switch Type MICRO SWITCH Standard 25,15 mm H x 17,45 mm W x 49,28 mm L [.99 in H x .687 in W x 1.94 in L]
Ampere Rating 15 A
Sealed Environmentally
Circuitry SPDT
Actuator Pin Plunger
Termination Solder
Voltage 250 Vac
Contact Type Silver
Operating Force (OF) 40 gf max.
Release Force 20 gf min.
Material Plastic
Housing Material General Purpose Phenolic
Agency Approvals and Standards UL, CSA
Mounting Screw Size 3,53 mm [0.139 in]
Mounting Centers 25,4 mm [1 in]
Tightening Torque 0,33 N m [3.0 in lb]
Weight 226,8 g [0.50 lb]
Package Height 24,1 mm [0.95 in]
Package Width 17,5 mm [0.69 in]
Package Length 49,3 mm [1.94 in]
Recommended For Adjustable Deadbreak Wheel on top of switch to change the air gap. Dial in OP, RP, and DT. "G" Load 5-8 grams
Comment Operating characteristics measured at minimum settings
Availability Global
Series Name BZ/BA/WA/YZ

Documents

TITLE DOCUMENT TYPE LANGUAGE SIZE
4BS3 highres photo Photo English 185KB
4BS3 lowres photo Photo English 34KB
MICRO SWITCH BS/ DT/MT/MN/TB Series Premium Large Snap-Action Switches Datasheet English 2MB
Basic, Toggles, and Rocker Switches Range Guide Product Range Guide English 2MB
Safety and Productivity Solutions in Hospital Applications Brochure English 5MB

Product Features

  • Accepted world-wide standard "Large Basic" switch
  • Low operating force and differential travel
  • Long mechanical life up to 20,000,000 cycles at 95% survival
  • Elongated mounting hole for easier, more accurate mounting
  • Current rating ranges from 15 A to 25 A
  • Choice of actuation, termination and operating characteristics

Applications

  • Irrigation systems
  • Semi-trailer trucks
  • Timing devices
  • Office equipment
  • Test instruments
  • Medical/dental equipment
  • HVAC equipment
  • Manually operated devices
  • Valves

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