ST-04CH Audio Products

Series:	ST
Packaging:	Tape & Reel (TR)
Lead Free Status / RoHS Status:	--
Part Status:	Active
Driver Circuitry:	Transducer, Externally Driven
Input Type:	Zero-Peak Signal
Voltage - Rated:	5V
Voltage Range:	4 ~ 6V
Frequency:	2.73kHz
Technology:	Magnetic
Operating Mode:	Single Tone
Duration:	--
Sound Pressure Level (SPL):	88dB @ 5V, 10cm
Current - Supply:	100mA
Port Location:	Side
Operating Temperature:	-30°C ~ 70°C
Approvals:	--
Ratings:	--
Mounting Type:	Surface Mount
Termination:	Solder Pads
Size / Dimension:	0.335" L x 0.335" W (8.50mm x 8.50mm)
Height - Seated (Max):	0.169" (4.30mm)

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Alarms, Buzzers, and Sirens

Alarms, buzzers, and sirens serve essential purposes, such as alerting individuals of danger or signaling events. Two of the most popular signaling devices are the ST-04CH and its working principle. The ST-04CH is a 12V DC, UL listed, long-range piezo sounder approved for use in dry indoor and outdoor environments. Its construction allows for versatility in wiring and installation and ensures a long life by including waterproof and dustproof features.The ST-04CH offers a wide range of applications in security, fire, environmental, and safety warning systems. It’s typically used to detect potential hazardous situations in production and industrial settings, including high voltage, hazardous gas, and the risk of fire. For instance, the device is often integrated with advanced alert systems or smoke, heat, and gas detectors to provide audible warnings. It also has several applications in general emergency signaling, such as car horns, security sirens, and school bell systems.The ST-04CH works by producing a loud yet pleasant sound—usually between 70 and 90 dB, depending on the model—which is created by the vibration of a specially designed piezo ceramic crystal element. The ceramic crystal contains a special “snap” feature, which create the perfect tonal range to meet the needs of most applications.The frequency range of the ST-04CH is between 2 kHz and 18 kHz, with the maximum sound output being dependent on the output of the sounder. The sounder can be easily programmed to offer a variety of sound tones, which can be adjusted according to the application requirements. In addition to these programmable features, the sounder also provides a wide range of adjustable sound levels and duration options.When it comes to installation, the ST-04CH is a relatively easy device to install. It includes two wire screw terminals for quick and easy connection, a waterproof sealant to ensure protection from water or dust, and a built-in mounting bracket. It’s rated for up to 20 A, so it can handle both AC and DC loads. Additionally, the sounder offers a wide input voltage range, from 8-24V.The ST-04CH is a highly reliable and sophisticated device. Its durable construction and flexible features make it suitable for a wide range of demanding applications, from firefighters to factories. Its piezo technology delivers maximum sound outputs and wide frequency ranges, making it an optimal choice for signaling devices.

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