SCE028MA3DP3B

Series:	SCE
Packaging:	Bulk
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
Driver Circuitry:	Indicator, Internally Driven
Input Type:	AC
Voltage Range:	16 ~ 28 V
Frequency:	2.9kHz
Technology:	Piezo
Operating Mode:	Double Pulse, Slow
Duration:	0.5 PPS
Sound Pressure Level (SPL):	75dB @ 16V, 61cm
Current - Supply:	40mA
Port Location:	Top
Operating Temperature:	-40°C ~ 85°C
Approvals:	cUL, UL
Ratings:	--
Mounting Type:	Panel Mount
Termination:	Terminal Block
Size / Dimension:	1.692" Dia (42.98mm)
Height - Seated (Max):	1.511" (38.39mm)

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Alarms, Buzzers, and Sirens are important safety and security tools used in many situations. SCE028MA3DP3B is a low-profile, surface-mount sounder/alarm/buzzer which belongs to this category of signalling devices. This article provides an overview of the application field and working principle of SCE028MA3DP3B.The SCE028MA3DP3B sounder/alarm/buzzer can be used in a variety of applications, such as residential and commercial fire systems, home security systems, building access control systems, intruder alarm systems, environmental control systems, and other applications where a local audible warning sound is required. This sounder/alarm/buzzer is available in two tones (High and Low) and a choice of 4 selectable Audible Range Outputs (ARRs). It is able to provide instantaneous warning signal in both active and standby modes.SCE028MA3DP3B has a working voltage of 12 to 28V DC and a sound pressure of 88 dB at a rating of 1.0 m. Its size is very compact, with a diameter of 28 mm and a height of 8 mm. The device has an efficiency rating of 98%, which means it uses very little energy for operation.The sounder/alarm/buzzer is designed to be resistant to moisture and dust, making it suitable for indoor as well as outdoor applications. It is also resistant to vibration and shock, and is compliant with EU, EN, and UL standards.The working principle of the SCE028MA3DP3B sounder/alarm/buzzer is straightforward. It has two electromagnets, located at the back and front of the device. When power is applied to the device, the electromagnets create an alternating north and south magnetic field, which causes the sounder/alarm/buzzer diaphragm to vibrate. This vibration produces a sound wave with a frequency that is determined by the voltage and current of the power source. The higher the voltage, the higher the frequency of the sound wave.The electromagnets and diaphragm are designed to produce a uniform sound pressure at different ranges. This ensures that the emitted sound can be heard by people nearby, even in loud environments. The output range of the SCE028MA3DP3B is 28 dB (A).In conclusion, SCE028MA3DP3B sounder/alarm/buzzer is a low-profile signal device designed for indoor and outdoor applications. It is highly efficient, resistant to multiple environmental conditions, and compliant with EU, EN, and UL standards. Its working principle is based on two electromagnets creating an alternating magnetic field, which vibrates the diaphragm and produces sound waves with a predetermined frequency. The SCE028MA3DP3B can be used in various applications, such as home security systems, intruder alarm systems, environmental control systems, and more.

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