Bryant
Bryant 4902BI 20A Ivory Toggle Contactor
20 A ivory toggle contactor rated for 120/277 V AC with double-pole maintained switching and screw-terminal wiring
- 20 A rating handles heavy lighting and motor loads
- Double-pole toggle switches both hot legs simultaneously
- 120/277 V AC compatibility fits commercial circuits
- Screw terminals accept back and side wiring methods
- Ivory finish matches standard commercial wall plates
Industrial Toggle Switch
The Bryant 4902BI is a 20 A double-pole toggle contactor rated for 120/277 V AC circuits. It is intended for industrial control panels and machinery starters that require a maintained switching action. The ivory housing and screw-terminal wiring suit both back and side entry methods. A brass and nickel-plated steel ground terminal is included for reliable grounding.
Silent Operation and Low Heat
The toggle mechanism produces no audible coil hum and generates negligible heat during normal 20 A loading. With no moving fan or active cooling, the unit runs silently in motor starter enclosures. Power draw is limited to the contact resistance of the silver-alloy contacts, keeping panel temperatures stable. The 1.7 in overall height allows tight stacking without airflow concerns.
Replaces Worn Single-Pole Units
This contactor upgrades installations where a single-pole switch can no longer handle the required horsepower or where dual-circuit isolation is now mandated. The jump is worth it when a 2 hp motor load demands double-pole disconnect for safety compliance. It is not suited for applications needing momentary action, higher amperage ratings, or electronic control interfaces.
Highlights
- 20 A rating handles heavy lighting and motor loads
- Double-pole toggle switches both hot legs simultaneously
- 120/277 V AC compatibility fits commercial circuits
- Screw terminals accept back and side wiring methods
- Ivory finish matches standard commercial wall plates
Specifications
| Brand | BRYANT |
|---|
Questions about this item
How is the Bryant 4902BI wired and which step is often missed?
Connect hot and load wires to the brass screw terminals on the back or side; the step often missed is tightening the nickel-plated steel ground screw to the metal box.
What maintenance will the 20 A toggle contactor need over time?
Periodically retighten the screw terminals and check the brass contacts for discoloration; replace the unit if the toggle feels loose or the 2 hp motor rating can no longer be held.
At what load does the 120/277 V AC switch hit its thermal limit first?
The 20 A, 2 hp rating is the limiting factor; sustained current above 20 A or motor inrush beyond 2 hp will cause the contacts to overheat before the 1.7 in. body reaches any other constraint.
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