Gallery View: SMD types drive buzzer production

Model KLJ-4020 SMD electromagnetic buzzer from Changzhou Keliking Electronic Co. Ltd has 73dB minimum sound pressure level. Its oscillation frequency is 4,000Hz.

The RoHS-compliant unit runs on 2 to 4V and consumes 110mA maximum current. It has 12±2ohm coil resistance. The operating temperature is -20 to 70 C.

The minimum order is 100 units and the delivery lead time 3 days.

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Changzhou Keliking Electronic Co. Ltd's model KLJ-5018 is an SMD electromagnetic buzzer with 78dB minimum sound pressure level and 4,000Hz oscillation frequency. Its operating voltage is 2 to 4 V and the maximum current consumption 100mA. The coil resistance is 12±3ohm. The unit is designed for -20 to 60 C. It conforms to RoHS guidelines.

The maker's minimum order requirement is 100 units for delivery within 3 days.

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This SMD piezoelectric buzzer from Dongguan Rayking Electronics Co. Ltd, RK1230 model, has 4±0.5kHz resonant frequency and ≥75dB sound output at 10cm. Its rated voltage is 3V, maximum input voltage 25V and capacitance 16,000pF±30 percent at 120Hz.

The RoHS-compliant unit operates in -20 to 70 C, and suits medical equipment, e-book readers, and digital recorders and cameras. It measures 12x12x3mm and weighs 0.3g.

An order should at least be 100 units. Delivery takes 15 days.

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Dongguan Rayking Electronics Co. Ltd offers an SMD electromagnetic buzzer with 2,731Hz resonant frequency and ≥82dB sound output at 10cm. The RK7525 model has 3V rated voltage and 16±3ohm coil resistance. Its operating temperature is -20 to 70 C.

The required minimum order for this RoHS-compliant buzzer is 100 units and the delivery lead time 15 days.

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Model KS-1206D05YA (3) electromagnetic buzzer from Switchtech Enterprise Ltd operates on 2 to 5Vp-p and has maximum rated current of 30mA. Its minimum sound pressure level is 80dB at 10cm and 3Vp-p rated voltage. The frequency of square wave output signal is 2,700±300Hz.

The RoHS-compliant unit operates in -20 to 60 C and stores in -30 to 70 C. It is 9x5.5mm and 0.8g.

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Switchtech Enterprise Ltd's piezoelectric buzzer, KS-1407T2P04A (3) model, has operating voltage of 3 to 16Vp-p and rated voltage of 12Vp-p. The maximum rated current is 5mA. At 10cm and rated voltage, the minimum sound pressure level is 85dB. The frequency of square wave output signal is 4,000±500Hz.

The 14x7mm unit operates in -20 to 70 C and stores in -30 to 80 C. It meets RoHS requirements.

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