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Mean Well PWM-40-12 Power Supply 40W 12V - Dimmable 3.34A

PWM style outputfully isolated plastic caseIP67Class II design without FGbuilt-in 3 in 1 dimming

SKU PWM-40-12

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PWM-40-12

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The PWM-40 is a 40W Mean Well AC-DC constant voltage LED driver (input: 90~305VAC, output: 12V, operating temperature: -40~+85°C).

Key Features

✓ Input voltage: 90~305VAC
✓ Output voltage: 12V
✓ Rated output current: 3.34A
✓ 3-in-1 dimming (0–10V / PWM / resistance)
✓ Class II design — no earth connection required
✓ Ingress protection: IP67
✓ Operating temperature: -40~+85°C
✓ Safety certifications: CB, CCC, CE, EAC, ENEC, UL
✓ 5 year warranty

Frequently Asked Questions

Can I use the PWM-40-12 to power 12V LED strip lighting outdoors?

Yes. The PWM-40-12 is rated IP67, meaning it is fully protected against dust and can withstand temporary immersion in water, making it suitable for outdoor and wet-location LED strip installations. Its operating range of -40°C to +85°C also covers most outdoor climates.

How much 12V LED strip can the PWM-40-12 drive?

The PWM-40-12 delivers a maximum of 40W at 12V. To find the maximum strip length, divide 40W by your strip's rated watts per meter — for example, a 10W/m strip allows up to 4 meters. Always check your specific strip's rated power per meter before finalizing the run length.

Is the PWM-40-12 suitable for dimmable LED sign or display lighting?

Yes. The PWM-40-12 features built-in 3-in-1 dimming, supporting 0–10V, PWM signal, and resistance dimming methods. This makes it well suited for dimmable 12V LED signage, channel letter lighting, and display case illumination.

Can I use the PWM-40-12 in an enclosed or weatherproof fixture?

Yes. The PWM-40-12 uses a fully isolated plastic case with a Class II design that requires no earth ground (FG), so it can be installed inside sealed or non-metallic enclosures. The IP67 housing also allows direct exposure to moisture without an additional enclosure.

Is the PWM-40-12 appropriate for powering 12V landscape or pathway lighting?

Yes. The IP67 rating and -40°C to +85°C operating temperature make the PWM-40-12 a practical choice for buried or surface-mounted 12V landscape and pathway lighting applications. Its 40W capacity can supply multiple low-wattage fixtures on a shared circuit.

How does the PWM-40-12 compare to other wattage options in the PWM series?

The PWM series is available at 40W, 60W, 90W, 120W, and 200W, with 12V, 24V, 36V, and 48V variants. The PWM-40-12 provides 3.34A at 12V; the PWM-60-12 provides 5A, the PWM-90-12 provides 7.5A, the PWM-120-12 provides 10A, and the PWM-200-12 provides 15A. Choose based on total load wattage.

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Model	Power	Voltage	Current	IP Rating
Mean Well PWM-40-24 Power Supply 40W 24V - Dimmable 1.67A	40W	24V	1.67A	IP67	View
Mean Well PWM-40-48 Power Supply 40W 48V - Dimmable 840mA	40W	48V	0.84A	IP67	View
Mean Well PWM-40-36 Power Supply 40W 36V - Dimmable 1.12A	40W	36V	1.12A	IP67	View

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Key Features

✓ Input voltage: 90~305VAC

✓ Output voltage: 12V

✓ Rated output current: 3.34A

✓ 3-in-1 dimming (0–10V / PWM / resistance)

✓ Class II design — no earth connection required

✓ Ingress protection: IP67

✓ Operating temperature: -40~+85°C

✓ Safety certifications: CB, CCC, CE, EAC, ENEC, UL

✓ 5 year warranty

Mean Well PWM-40-12 Power Supply 40W 12V - Dimmable 3.34A

Select model — 7 in this family

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Mean Well PWM-40-12 Power Supply 40W 12V - Dimmable 3.34A

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