Voice Coil Auto Focus Motor for M12 Lenses
Voice Coil Auto Focus Motor for M12 Lenses
M12 Lens VCM autofocus motor

M12 Voice-Coil Auto-focus Motor up to 7g, 400um

Voice Coil Motor M12 Lens Mount with 23.5mm hole spacing

The CLA321-VCM is an affordable voice-coil auto-focus motor for M12 Lenses. It is rated for lenses up to 7g. This VCM has a full stroke of 400um. Unfortunately, we do not currently provide SW/FW drivers. We recommend the Dongwoon DW9714 or Texas Instruments DRV201 as a driver. There are many other VCM alternatives with different size; please contact us for more details. Please also see our alternative ultrasonic M12 lens focus motor which includes a driver and USB adapter board.

$29.00

CLA321-VCM (Default Title) — we try to restock quickly, contact for availability

.STP / Drawing Engineering Support Get Volume Pricing

Optical and Mechanical Specification Table

Lens Parameter Performance Detail
Part NumberCLA321
Click here to download .STP files and Mechanical Drawings
Same Day Ship by 12 PM PST
US-Based Optical Engineering Support
25,000+ Stock in California
100% MTF Tested

Frequently asked questions

What is the maximum lens weight for the CLA321-VCM?

The CLA321-VCM supports M12 lenses up to 7g. With a 5g lens in vertical orientation at 100mA, it can achieve 600μm or more of stroke.

What stroke does the CLA321-VCM voice coil motor provide?

The CLA321-VCM provides a full stroke of 400μm under standard conditions. A 5g lens in vertical orientation can exceed 600μm at 100mA.

What driver ICs work with the CLA321-VCM?

Commonlands recommends the Dongwoon DW9714 or Texas Instruments DRV201 as driver ICs. Those parts are a practical starting point because Commonlands does not currently supply its own SW or FW driver stack.

What is the rated current for the CLA321-VCM?

The rated current is 120mA, and the absolute maximum is 150mA. The starting current, where displacement reaches 10μm, is 45-65mA.

Does the CLA321-VCM ship same day from the US?

Yes. Orders placed before 12 PM PST ship same day from our San Diego warehouse.

Is the CLA321-VCM life-tested?

Yes. Commonlands life-tested the CLA321-VCM to 500,000 cycles at 23°C with a 0.5s ON, 0.5s OFF, 0-90mA-0 cycle profile.

The CLA321-VCM is a voice-coil auto-focus motor for M12 lenses up to 7g. Its full stroke is 400μm, which is enough travel for most S-mount focus adjustments on embedded vision cameras. Rated current is 120mA, and the absolute maximum is 150mA, so driver sizing is straightforward.

The terminal resistance is 37Ω ±5Ω at 23°C. Starting current is 45-65mA, and sensitivity runs from 5 to 40 μm/mA depending on lens weight and orientation. With a 5g lens in vertical orientation, the motor reaches 600μm+ stroke at 100mA. That range matters because real focus travel depends as much on the mechanics as the coil.

The motor uses a magnetic design with red (+) and black (−) leadwires. Positive voltage on the red wire moves the lens away from the sensor. Insulation resistance exceeds 1MΩ at DC 50V, and Commonlands life-tested the unit to 500,000 cycles at 23°C.

Commonlands does not currently supply software or firmware drivers for the CLA321. We recommend a Dongwoon DW9714 or Texas Instruments DRV201 driver IC. If you want a turnkey setup with the driver and USB adapter already handled, look at the ultrasonic M12 lens focus motor, the CLA322.

Orders placed before 12 PM PST ship same day from San Diego. Contact engineering@commonlands.com for volume pricing or integration support.

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About Commonlands

Commonlands LLC designs and manufactures precision M12, C-mount, and M8 lenses for machine vision, robotics, and embedded camera systems. Based in San Diego, California, we stock inventory for same-day shipping and provide direct access to US-based optical engineers. Whether you need a single prototype lens or production volumes of 25,000+, our team supports the full lifecycle from optical design consultation through volume fulfillment.

Need help selecting the right lens for your camera module?

Contact our US-based Optical Engineers.

📞 +1 (858) 333-7325 📹 Schedule a Video Call ✉️ contact@commonlands.com