ACR SM-3 SOLAS Automatic LED Lifebuoy Marker Light with Mounting Bracket (3947)

The ACR SM-3 is a self-igniting LED marker light for lifebuoys used aboard commercial and recreational vessels. When deployed into the water, its buoyant body rights itself and activates a high-visibility strobe, helping rescuers keep track of a person-overboard location. The supplied bracket uses the same mounting-hole pattern as the older SM-2 for straightforward replacement.

Key Features & Benefits

• Automatic self-righting light: Buoyant housing keeps the light upright while a gravity switch activates the strobe.
• 360° emergency visibility: At least 3 candela light intensity across its rated operating duration.
• Long operation: Runs over 40 hours at 86°F or over 24 hours at 30°F at its rated brightness.
• User-replaceable power: Uses two widely available AA lithium batteries.
• SOLAS-ready configuration: USCG, MED and SOLAS-approved lifebuoy light with supplied bracket.

Technical Specifications

• Light source: High-intensity LED strobe
• Operation: Automatic gravity switch; activates upright
• Visibility: Approximately 2 miles; 360°
• Light intensity: At least 3 candela throughout rated duration
• Flash rate: 50–70 flashes per minute
• Operating life: 40 hours at 30°C; 24 hours at -1°C
• Battery: 2 AA lithium L91 batteries; not included
• Dimensions: 9.9 in long x 2.2 in diameter (253 x 56 mm)
• Light weight: 0.66 lb (300 g), without batteries
• Material: UV-resistant polycarbonate
• Housing color: International safety orange
• Buoyant: Yes; self-righting
• Drop-tested: Up to 76 m
• Approvals: USCG, SOLAS, MED

Compatibility

For lifebuoy marker-light applications requiring the cited approvals. Included bracket 9630 fits SM-3; its mounting-hole pattern matches the earlier ACR SM-2 bracket.

Installation & Use

Install the bracket near the lifebuoy, insert two suitable AA lithium batteries, and secure the marker according to vessel safety requirements. Confirm that it can detach and float clear during deployment.

Warranty

1-Year Limited Warranty

What's in the Box

• SM-3 automatic lifebuoy marker light
• SM-3 mounting bracket (9630)