Huaxin Optics S11 Standard 5mW Laser Diode Module | Fixed Focus, 1.5mm Spot

The Huaxin Optics S11 is a versatile, entry-level 5mW laser diode module designed for integration into a wide range of DIY projects, educational kits, alignment systems, and low-power laser applications. Featuring a compact all-metal housing, a fixed-focus lens producing a clear 1.5mm spot, and simple 3V DC operation, it offers reliable performance in a cost-effective package. Its standard form factor makes it an ideal drop-in replacement or core component for custom builds requiring a precise, low-power visible laser source.

Technical Specifications

• Laser Diode & Optical Output:

  • Wavelength Options: Red (650nm), Green (532nm), Blue (450nm), Violet (405nm)

  • Output Power: <5mW (Class IIIa/3R Laser Product) – Safe for incidental viewing under normal use.

  • Beam Diameter at Aperture: ~1.5mm (nominal).

  • Beam Divergence: < 1.5 mrad (typical).

  • Spot Size at 1 meter: ~1.5mm – 3.0mm (depends on exact focus and wavelength).

  • Lens: Fixed-focus acrylic or glass lens, pre-adjusted at the factory.

• Electrical & Mechanical:

  • Operating Voltage: 3.0V DC (±0.5V) – Compatible with two AA batteries or a single 3.7V Li-ion with a current-limiting resistor.

  • Operating Current: 20-40mA (typical, varies by color/wavelength).

  • Input Polarity: Center pin is POSITIVE (+). Outer barrel/case is NEGATIVE (-).

  • Dimensions (Module): Standard 12mm diameter x 45mm length (approx., including lens housing).

  • Housing Material: Anodized aluminum.

  • Mounting: Standard 12mm outer diameter for easy mounting in brackets, heatsinks, or custom 3D-printed holders.

• Reliability & Compliance:

  • Certifications: CE, FCC, RoHS compliant. (Note: Final product integration may require additional certification).

  • Operating Temperature: 0°C to 40°C.

  • Storage Temperature: -10°C to 50°C.

  • Warranty: 3 Years limited warranty against manufacturing defects.

  • Production Date: Coded on label. Fresh stock guaranteed.

• Safety Classification:

  • Laser Class: Class 3R (IEC/EN 60825-1). Output <5mW. Avoid direct eye exposure. Not intended for pointing devices.

Key Features & Applications

• Plug-and-Play Simplicity: Ready to use with a standard 3V DC power source. No complex driver circuit required (though a simple current-limiting resistor from a 5V source is recommended).

• Standard Universal Form Factor: The 12mm diameter is an industry-standard size, compatible with countless mounts, heatsinks, and project enclosures available online.

• Clear, Defined Spot: The factory-focused 1.5mm spot is ideal for alignment, leveling, positioning, and educational optics demonstrations.

• Cost-Effective & Reliable: Provides consistent performance for hobbyist, educational, and light commercial applications at an accessible price point.

• Ideal For:

  • DIY & Maker Projects: CNC laser engraver alignment, 3D printer bed leveling sensors, custom laser levels.

  • Education & Science Kits: Demonstrating principles of light, optics, and lasers in classrooms.

  • Industrial/Commercial: Low-power alignment in machinery, simple positioning sensors, retail barcode scanner replacements (internal use).

  • Art & Decor: Laser projection effects, light show components (when diffused or scanned).

Package Contents

• 1 x Huaxin Optics S11 Laser Diode Module (wavelength as selected)

• (Optional) 1 x 100 Ohm 1/4W current-limiting resistor (for use with 5V USB power sources)

• Basic specification sheet

Ordering Information (SKU Table)

Connection Diagram (Simplified)

For use with a 3V Battery Pack (2xAA):
Battery (+) —> Module Center Pin (+)
Battery (-) —> Module Case (-)

For use with a 5V USB Power Source:
USB 5V (+) —> 100 Ohm Resistor —> Module Center Pin (+)
USB GND (-) —> Module Case (-)

⚠️ Safety & Legal Note: While this is a low-power (<5mW) module, it is still a laser. Do not stare into the beam. Never aim at people, animals, vehicles, or aircraft. The user is responsible for complying with all local regulations regarding laser use, especially in public or in devices that could be perceived as pointers. This module is intended for integration into other products or for controlled experimentation, not as a standalone handheld device.