Electric Buzzer Guide: Modular Buzzers, Buzzer Switches and Uses

Electric buzzer: the short answer

An electric buzzer is a small sounder that gives a single steady tone for as long as its push is held, used to call someone rather than to announce a visitor with a chime. Offices use one to call an attendant to a cabin, clinics to call the next patient, and homes to let an elderly parent call for help from bed.

The modern kind is a modular buzzer: a module that clips into the same plate as your switches, worked by a bell push somewhere else. We make modular electronic buzzers in our KEMPS, VIZA and VIZA Black ranges at our works in Marol, Andheri East, Mumbai, along with the bell pushes that operate them.

Below we cover what a buzzer is, buzzer vs doorbell, what a buzzer switch actually is, where buzzers are used, how one is connected, why it stops working, and the MRPs of the buzzers and pushes we make. For door bells with ding dong and musical tunes, see our door bell for home guide.

What is an electric buzzer?

An electric buzzer is a device that makes a continuous buzzing or beeping sound when current flows through it, either from a vibrating metal contact in the older electromechanical type or from a small electronic circuit driving a sounder in the electronic type that most modular buzzers use today.

Both kinds do the same job: sound while the circuit is closed, stop when it opens. The electronic kind has no contact that wears out by arcing, and its tone is usually cleaner. The electromechanical kind is the classic rasping buzz of old offices and schools.

Our catalogue lists the KEMPS K224 as an electronic buzzer and the VIZA V302 and VIZA Black V1289 as electric buzzer, 2M modules. All three fit a standard modular plate, so the buzzer sits flush in a switch board instead of hanging on the wall as a separate box.

Buzzer vs doorbell: what is the difference?

The difference between a buzzer and a doorbell is that a buzzer gives one steady tone for as long as the push is held and is meant for calling someone inside a building, while a doorbell plays a chime or tune once per press and is meant to announce a visitor at the door.

That changes where each goes. A door bell sits in the hall and is pressed by strangers, so a pleasant chime suits it. A buzzer sits where staff or family are and is pressed by someone who knows the code: one long press, two short.

Prices overlap, so choose by job, not cost. Our ten VIYONA door bells, ₹195 to ₹375 at MRP, are on the VIYONA door bells page.

What is a modular buzzer?

A modular buzzer is a buzzer built as a switch board module, the same width and fixing as a switch, so it clips into a modular plate alongside switches and sockets; our VIZA and VIZA Black buzzers take two modules, so the buzzer matches the rest of the board with a flush fit and no separate box on the wall.

KEMPS K224 is an electronic buzzer module at ₹230 MRP in white, and ₹265 as the grey K624. Plan the plate size around it: a 2M buzzer plus a switch and a socket needs a 4M plate. Our modular plate sizes guide shows how modules add up.

What is a buzzer switch?

A buzzer switch is a bell push: a momentary switch that closes the circuit only while it is pressed and springs back open when released, so the buzzer sounds for exactly as long as the finger stays on it; an ordinary on/off light switch would leave the buzzer sounding until someone switched it off again.

Pushes with indicator glow so they can be found in the dark: KEMPS K115 at ₹145, VIZA V535 at ₹93. Never wire a buzzer to a 1 way switch; our 1 way vs 2 way switch guide explains how those latch.

Where are electric buzzers used?

Electric buzzers are used wherever one person needs to call another who is in a different room without a phone: a manager’s cabin calling an office attendant, a doctor calling the next patient, a shop’s back room calling the counter, a factory gate calling security, and a bedroom calling family elsewhere in the house.

Offices a push under the cabin desk, the buzzer at the attendant’s table. Clinics the doctor’s push sounds in the waiting area. Hospitals nurse call bells use a buzzer at the station; our hospital call bell system guide covers that set-up with indicators. Homes a bed push for an elderly parent, wired to a buzzer in the kitchen or hall.

In each case a code grows up naturally: one press for tea, two for the file. That only works because a buzzer sounds for exactly as long as it is pressed. A door bell’s chime plays the same way whether pressed for a second or ten, so it cannot carry a press code at all.

Buzzer for an office cabin: how to set one up

To set up a buzzer for an office cabin, fit a bell push within reach of the desk chair, usually in the desk-side switch board or a small plate on the desk edge, and fit the buzzer module in the board at the attendant’s or receptionist’s desk, with the cable between them run in conduit along the wall.

With several cabins, each cabin gets its own push. If they share one buzzer, the attendant cannot tell which cabin called; a separate buzzer per cabin, or an indicator per cabin, solves that. Indicators are the approach hospitals use, as our call bell guide explains.

Office switch boards are covered in our home office electrical points guide. A typical attendant’s board might carry a 2M buzzer, a light switch and a socket in a 4M plate, all in one range so the plates match the rest of the office.

Electric buzzer connection: how is it wired?

An electric buzzer is connected like a door bell: the phase runs through a bell push to one terminal of the buzzer, and the neutral goes to its other terminal, so pressing the push completes the circuit and releasing it breaks the circuit; the push always goes in the phase side, never the neutral.

Common practice points: the buzzer circuit is fed from a lighting circuit MCB or its own; the push and buzzer each sit in a box and plate; cable between them runs in conduit; and the push breaks the phase, so the buzzer terminals are not live while it is silent. Check the module’s own marking for the supply and terminal layout before wiring.

Our switch board wiring diagram guide shows how modules share a supply in one board.

Why is my buzzer not working?

A buzzer usually stops working because of a dead push, a loose wire at the push or buzzer terminals, a tripped MCB on its circuit, or a failed buzzer module, and checking them in that order, from the cheapest fix to the dearest, finds most faults quickly.

Push a push pressed thousands of times wears; try another push on the same circuit. Loose terminal common where a push sits on a door frame that moves. MCB check the board before anything else. Module if supply reaches the buzzer and it stays silent, replace it; modules are cheap and our KEMPS K224 is ₹230.

The same checks apply to a door bell, and our doorbell not working guide walks through them step by step. A buzzer that sounds without being pressed points to a shorted push or damp in the box; switch it off at the MCB until it is checked.

Buzzer or door bell: which should you fit?

Fit a door bell at the front door where visitors announce themselves, and fit a buzzer wherever someone inside the building needs to call someone else, because the chime suits a visitor and the steady, code-friendly tone of a buzzer suits staff and family who know what each press means.

Many buildings end up with both: a ding dong bell at the main door and a buzzer for the cabin, the clinic room or the bedroom. They can be on the same lighting circuit but should have separate pushes, so nobody confuses a visitor with a call.

For a home with an elderly parent, a bed push wired to a buzzer is often the most useful bell in the house; our electrical safety for elderly at home guide puts it alongside night lighting and easy switches.