9.7mm Walkie Talkie Electret Microphone Capsule with Pins

Walkie Talkie Electret Microphone Capsule with Pins 9.7mm

The ECM-B9745AP2.8-30RC-597 is a 9.7 x 4.5 mm omnidirectional electret mic capsule with 2 pins, -30dB±2 sensitivity, and a 76dB SNR, ideal for business intercom equipment pickup.

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🧭 Trial Order

From 200 pcs
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📦 MOQ

5,000 pcs
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Model: ECM-B9745AP2.8-30RC-597
Dimensions: 9.7 × 4.5 mm
Directivity: Omnidirectional
Sensitivity: -30 dB ± 2
Impedance: 2.2 kΩ
S/N Ratio: 76 dB
Max SPL: 110 dB
Operating Voltage: 2 Vdc
Frequency Response: 50 Hz ~ 5000 Hz
Current Consumption: 500 μA

Tags: 9.7mm Electret Intercom Mics Pin-type Electret

Technical Specifications

Featuring full directionality and an internal dual-capacitor design for anti-interference, our 9745 high-sensitivity microphone head guarantees superior performance. Utilizing Korean JFET components, it delivers stability and reliability in every recording.

Standard Test Circuit

ECM-B9745AP2.8-30RC Test Circuit: 2.2kΩ bias, 2V supply, 1μF output

2.2kΩ bias resistor, 2V supply, 1μF output cap. Optimized for voice applications.

Typical Frequency Response

ECM-B9745AP2.8-30RC Frequency Response: Flat with decline after 2kHz

Flat response with gradual decline above 2kHz.

Dimensions (Unit: mm)

ECM-B9745AP2.8-30RC Dimensions: Φ9.7×4.5mm with front dust mesh (sealed back)

Φ9.7×4.5mm with front dust mesh (sealed back design). Equipped with 2.8mm pins, with 2.5mm spacing.

Packaging Overview

Standard packaging: 100 pcs per small box.
10 small boxes (1,000 pcs) are combined into one medium carton.
Several medium cartons are further packed into a large outer carton.
Pin-type microphones are protected with foam inside the small box.
Other types are packed directly or sealed in anti-static bags.

Reliability Tests

High Temperature Test: Microphone subjected to +80℃ for 100 hours, followed by 3 hours at room temperature.

Low Temperature Test: Microphone subjected to -40℃ for 100 hours, followed by 3 hours at room temperature.

Humidity & Heat Test: Microphone exposed to +55℃ and 85% relative humidity for 100 hours, followed by 3 hours at room temperature.

Thermal Shocking Test: Microphone subjected to [+80℃ 0.5H → room temp 1H → -40℃ 0.5H → room temp 1H] for 10 cycles, then exposed to room temperature for 3 hours.

Vibration Test: Microphone subjected to two hours of vibration in x, y, and z directions with frequencies of 10-55Hz and a 1.52mm amplitude.

Drop Test: Microphone dropped 5 times from a height of 1.0 meter onto a slippery marble floor, without packaging, and still performs normally.

Storage and Operating Temperature Range: Suitable for environments ranging from -35℃ to +60℃.

Sampling Process

Confirm customer requirements:

Review product application, microphone capsule specifications, usage scenarios, and sound quality needs.

Recommend and specify:

Provide recommended microphone capsule models and detailed specifications for customer evaluation.

Sample provision and testing:

Deliver microphone samples for customer testing and feedback purposes.

Optimize and finalize:

Refine microphone design based on feedback, finalize samples, and proceed to mass production upon quality approval.

Quality Assurance

Conducting sampling inspections of incoming materials to ensure compliance with standard requirements.

Performing inspection audits to ensure the stability and control of the entire manufacturing process.

Conducting pre-shipment inspections to ensure that products meet established quality standards.

Acoustic Laboratory

Testing of background noise, sensitivity, frequency response curve, and directionality indicators.

Verification of the impact of different circuits, structural dimensions, materials, and processes on indicators.

Reliability testing at both the new product design stage and the mass production regular stage.

Automatic Workshop

Utilizing fully automated production lines to ensure high efficiency and consistency.

Equipped with state-of-the-art facilities, including a 10,000-level dust-free workshop.

Employing a rigorous 21-step process to guarantee product stability.