Linear vibration motor

When selecting a Linear Resonant Actuator (LRA), the primary focus should be on the Resonant Frequency and G-force acceleration. For smartphones and wearables, a frequency of 170Hz to 235Hz is standard to mimic tactile button presses. Ensure the supplier provides a Bode plot to verify the narrow bandwidth characteristic of LRAs. Additionally, check for Rise and Fall times (Start/Stop time); high-quality motors should achieve full vibration within 50ms and stop within 30ms to prevent 'mushy' haptic sensations.

For industrial applications, prioritize Rated Voltage (typically 2.0V to 3.0V AC) and Max Current Consumption (usually <100mA). You must verify the Vibration Direction, distinguishing between Z-axis (vertical) for thin devices and X-axis (horizontal) for larger surfaces. Ensure the motor has a MTBF (Mean Time Between Failures) of at least 1 million cycles or 100,000 operations to guarantee longevity in high-use environments.

All linear vibration motors must be RoHS and REACH compliant to ensure they are free from hazardous substances like lead and cadmium. For automotive or medical grade applications, look for suppliers with IATF 16949 or ISO 13485 certifications. On Made-in-China.com, prioritize Audited Suppliers who can provide SGS or TÜV Rheinland inspection reports to validate their production line capabilities.

Unlike DC motors, LRAs require an AC signal at the resonant frequency. You must confirm that the motor is compatible with common Haptic Driver ICs (e.g., TI DRV series). Ask the supplier for the Internal Resistance (Ω) and Inductance (mH) values to ensure the driver can effectively perform Auto-Resonance Tracking, which compensates for frequency shifts due to temperature or mounting pressure.

Request a Pre-shipment Inspection (PSI) focusing on functional testing. Since vibration motors are sensitive to Electrostatic Discharge (ESD), ensure the supplier uses Anti-static tray packaging and vacuum-sealed bags. For bulk orders, use Trade Assurance services on Made-in-China.com to hold payment until the quality is verified by a third-party lab.

Negotiate based on Volume Tiers. For quantities above 10,000 units, you can typically expect a 15-20% price reduction. Always ask for the 'Golden Sample' before mass production; this sample serves as the legal benchmark for quality. If the supplier refuses to provide a detailed breakdown of material costs (BOM), use it as leverage to negotiate better payment terms, such as 30% deposit and 70% after QC inspection.

Due to the permanent magnets inside linear motors, they are classified as Magnetic Goods for air freight. You must ensure the supplier provides a Magnetic Inspection Report to comply with IATA regulations. For small batches, Express (DHL/FedEx) with magnetic shielding is best; for large volumes, Sea Freight (FCL/LCL) is more economical, provided the packaging includes desiccant packs to prevent moisture-induced corrosion of the terminals.