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Bryant 4921W 20A 3-Pole Momentary Contact Switch
The Bryant 4921W is a 20A momentary contact switch engineered for control circuit applications that call for precise, temporary circuit actuation rather than continuous on/off switching. Configured as a 3-pole, 2-circuit device, it allows a single switch body to manage multiple control functions from one compact footprint, which helps reduce panel space and simplify wiring in control cabinets and equipment enclosures. Momentary contact switches like the 4921W are commonly specified wherever an operator needs to trigger a control action, such as a jog, pulse, or interlock function, without holding the circuit closed for an extended period. This makes the switch a practical fit for industrial and commercial control panels, machine control stations, and other applications where a brief, spring-actuated switching event is required to initiate or interrupt a control function. As part of Bryant's line of control and switching devices, the 4921W is built to support dependable, repeatable performance in demanding electrical control environments where switch quality directly affects equipment uptime.
Key Features
- Amperage Rating: Rated 20A, giving the switch the electrical capacity needed for control and switching circuits in industrial and commercial systems.
- 3-Pole Configuration: A three-pole design allows a single switch body to control multiple circuit paths at once, simplifying control panel layouts that would otherwise require several separate switches.
- 2-Circuit Configuration: The 2-circuit configuration supports control schemes that require switching two separate circuits from a single device, useful for sequencing or dual-function control tasks.
- Momentary Contact Action: Momentary switching action is suited to jog, pulse, interlock, and similar control functions where continuous contact closure is not required or desired.
- Control-Grade Design: Constructed for use in control panels and industrial switching applications where reliable, repeatable actuation is essential to equipment operation.
- Compact Multi-Function Footprint: Combining 3-pole, 2-circuit switching in one momentary contact device helps consolidate control functions and reduce the number of components needed in a panel build.
Technical Specifications
- Refer to manufacturer documentation for complete technical specifications.
Typical Applications
- Motor Control and Jog Circuits
- Industrial and Commercial Control Panels
- Interlock and Pulse Control Systems
- Multi-Circuit Switching Applications
- Machine Control Stations and Equipment Enclosures
Why Bryant?
Bryant is a well-established name in electrical control and switching devices, and the 4921W reflects that focus with a 20A, 3-pole, 2-circuit momentary contact design built for dependable operation in control applications. For electricians, panel builders, and maintenance teams who need a switch that performs consistently under repeated momentary actuation, Bryant's control switching devices offer a dependable choice for professional electrical work where control accuracy and switching reliability matter.
Manufacturer Resources
Bryant Wiring Devices Catalog Section E (Switches)
Product Specs
- list_batch:
- BRY-20260909
- Product Type:
- Specialty Switch
- Amperage Rating:
- 20A
- Configuration:
- 3-Pole 2-Circuit Momentary Contact
- Department:
- Electrical
- Product Group:
- Wiring Devices
- Product Subgroup:
- Switches
Bryant 4921W – Frequently Asked Questions
1) What does momentary contact mean on the Bryant 4921W switch, and when would I use it instead of a standard toggle?
The 4921W is spring-actuated: the contacts change state only while the handle is held, then return when released. That is what you want for jog, pulse, and interlock functions where you are triggering a control action rather than leaving a circuit closed. If you need the circuit to stay on after you let go, a momentary device is the wrong choice and you want a maintained toggle instead, such as the Pass & Seymour CS15AC3W commercial specification grade toggle switch.
2) How many circuits can one Bryant 4921W switch control?
Two. The 4921W is a 3-pole, 2-circuit device, so a single switch body handles two separate control circuit paths across three poles. In a panel build that saves you wiring in two individual momentary switches, and it is the reason it gets specified for sequencing or dual-function control tasks.
3) Is the Pass & Seymour 2623W a substitute for the Bryant 4921W momentary contact switch?
No. The Bryant 4921W is a 3-pole, 2-circuit momentary contact switch, meaning the contacts close only while the operator holds the actuator and spring back when released - the action used for jog, pulse, and interlock control. The Pass & Seymour 2623W is a specification grade 3-way decorator paddle switch rated 20A at 120V/277V, which is a maintained-position switch for branch lighting control from two locations. The amperage matches at 20A, but the switching action and the circuit configuration do not, so the 2623W will not perform a momentary control function.
4) What is the exact part number to order this Bryant momentary switch?
Order Bryant 4921W. That is the manufacturer part number for the 20A, 3-pole, 2-circuit momentary contact switch, and it is the single model this product is sold as, so there are no finish or amperage options to pick.
5) Can I use the Bryant 4921W in a motor jog circuit?
Yes, that is one of its intended uses. Motor control and jog circuits, interlock and pulse control systems, and multi-circuit switching are the applications the 4921W is specified for, because the momentary action closes the control circuit only while the operator holds it.
6) Bryant 4921W versus Bussmann TPHCS-250 - which one belongs in a DC power circuit?
The Bussmann TPHCS-250 is a TPH Series high-current switch rated 80 Vdc with a 100kA short-circuit current rating, so it is the device aimed at DC power disconnection and high fault-current duty. The Bryant 4921W is a 20A momentary contact switch in a 3-pole, 2-circuit arrangement, sized for control circuit actuation such as jog and interlock functions rather than power switching. They address different points in the system and are not interchangeable.
7) For a general-purpose wall switch instead of a momentary control switch, what are the alternatives to the Bryant 4921W?
If the opening calls for ordinary on/off wall switching rather than momentary actuation, the Pass & Seymour CS15AC3W commercial specification grade toggle switch in white or the CS15AC3I in ivory cover that duty, and the Pass & Seymour TM TradeMaster 15A decorator switch offers a decorator-style paddle in the same role. The Bryant 4921W differs in both action and rating: it is a 20A momentary contact device in a 3-pole, 2-circuit configuration intended for control panels and machine control stations, not for room lighting.
8) What should I use instead of the Bryant 4921W if the panel needs to switch only one circuit?
The Bryant 4921W consolidates 3-pole, 2-circuit switching into one momentary body, which is chosen to cut component count in a panel build. Where only a single maintained circuit needs switching, a single-device specification grade switch such as the Pass & Seymour CS15AC3W in white or the CS15AC3I in ivory covers it. Note that neither provides momentary action, so a single-circuit momentary requirement is still a job for a momentary-contact device.
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Does the Bryant 4921W come with a warranty?
Absolutely. The Bryant 4921W is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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