Motor Driven Siren 123.3dB, 3 Phase 380V/2.2kW

4.5 out of 5 based on 2 reviews | Write a review

$1,959.98

Motor driven siren adopts a three phase motor and two-way alarm mode to realize emergency alarm. It has high volume 123.3dB, rated power 2.2kW (3 hp), working voltage 3 phase AC 380V, cast aluminum alloy shell, protection class IP44 and fast response time ≤3s. The rotary speed of motor driven siren is 2900 rpm.

SKU: ATO-MDSR-2d2K

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Delivery date: 8-12 days

Overview

Motor driven siren has high volume 123.3dB, working voltage 3 phase 380VAC, rated power 2.2kW (3 hp) and two-way alarm mode.

Specification:

Model	ATO-MDSR-JDL400
Shipping weight	61kg
Package dimension	756371cm
Working voltage	3 phase 380V
Working frequency	50Hz/60Hz
Rated power	2.2kW (3 hp)
Output volume	123.3dB (at a radius of 5 m)
Output frequency	500±20Hz
Sound	Continuous alarm sound (It is best to work for 2 minutes, and then stop working for 30 minutes. After the motor becomes cool, the motor alarm can work again.)
Working mode	Alarm when power on
Shell material	Cast aluminum alloy
Response time	≤3s
Protection class	IP44
Motor speed	2900 rpm

Tips: 3 alarm modes of motor driven siren
The motor driven siren is mainly used for air raid alarm system. According to specific provisions for air defense warning signal test, there are three alarm modes for air raid alarm.
Pre-alarm: Alarm 36 seconds, stop 24 seconds, last 3 minutes.
Air raid alarm: Alarm 6 seconds, stop 6 seconds, last 3 minutes.
Release alarm: Continuous alarm for 3 minutes.
When the air-raid siren stopped, it actually still makes a sound. A low-frequency humming sound is still made due to the inertia of the motor rotor. For example, pre-alarm is alarm for 36 seconds and stop for 24 seconds. In fact, what you hear is that the sound is higher in 36 seconds and lower in 24 seconds.
Under modern air strike conditions, sometimes air raid alarms may be issued directly, so everyone must learn to distinguish the alarms, not only can understand the air defense alarm signals, but also strive to identify them as soon as possible and make corresponding protective actions.

Existing reviews of Motor Driven Siren 123.3dB, 3 Phase 380V/2.2kW

High quality siren

This electric alarm is installed on our factory premises and it is definitely very loud. The motor starts up quickly and begins sounding in less than 3 seconds. The aluminum housing is waterproof. We have been using it for a while now and it has not rusted at all. The quality is excellent.

From: Jay | Date: 20/04/2026

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Reliable and well-made

I bought this motor driven siren for our factory’s emergency alarm system, and it has worked perfectly since installation. The sound is extremely loud and clear — easily covers a large area, which is exactly what we needed for safety alerts. The siren starts up very quickly, with almost no delay, and the two-way alarm mode makes it more versatile for different emergency situations. The build quality is excellent; the cast aluminum alloy shell feels sturdy and durable. Even after continuous use, it runs smoothly without overheating.

From: Jasper | Date: 14/10/2025

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