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HB

Single Pole Standard Precision Snap-acting Switches

HB, Snap-acting

Features/Benefits

  • Low differential travel, high repeatability
  • Long life—150,000 cycles typical
  • Single and double pole circuitry
  • Sealed actuator and case

Typical Applications

  • Thermostats
  • Motors
  • Industrial controls

Specifications

  1. CONTACT RATING: From low level* to 20 AMPS @ 480 V AC;see ELECTRICAL RATING option section for complete listings.
  2. ELECTRICAL LIFE: 150,000 cycles at 20 AMPS @ 250 V AC.consult Customer Service Center for typical life at other ratings.
  3. INSULATION RESISTANCE: 1,000 M ohm min.
  4. DIELECTRIC STRENGTH: 1,500 Vrms min. @ sea level.
  5. OPERATING TEMPERATURE: –67ºF to 302ºF (–55ºC to 150ºC).
  6. OPERATING FORCE: From 4 oz. to 26 oz. max. at actuator button available.
  7. MOUNTING SCREWS: Torque 3 in/lbs max.(Note: Exceeding 3 in/lbs torque may change operating characteristics and increase the possibility of cracking switch case).
  8. TERMINAL SCREWS: Torque 4 in/lbs max.
  9. PANEL MOUNTING BUSHING: Torque 4-6 in/lbs max.
  10. DEGREE OF PROTECTION: IP65; Dust-proof, water splash and dew condensation.
  11. Low Level=conditions where no arcing occurs during switching, i.e., 0.4 VA max. @ 20 V AC or DC max.

Materials

  1. SWITCH HOUSING: Heat resistant/electrical grade phenolic.
  2. INSERTS: Brass alloy.
  3. ACTUATOR BUTTON: Moisture resistant phenolic.
  4. SPRING: Copper alloy.
  5. PIVOT: Brass alloy.
  6. MOVABLE CONTACTS: Gold alloy for ratings 1 AMP or less.Fine silver for ratings greater than 1 AMP and motor load ratings less than 1/2 HP @ 125 V AC. Silver alloy for motor load ratings 1/2 HP @ 125 V AC or greater.
  7. STATIONARY CONTACTS: Gold alloy for ratings 1 AMP or less.Fine silver welded to copper base for ratings greater than 1 AMP and motor load ratings less than 1/2 HP @ 125 V AC.Silver alloy on copper base for motor load ratings 1/2 HP @ 125 V AC or greater.
  8. TERMINALS: Brass alloy, bright tin plated.