SMA905 High Power Metal Fiber Optic Connector vs. other common fiber optic connectors
Jul 09, 2025
Here's a detailed comparison of the SMA905 High Power Metal Fiber Optic Connector vs. other common fiber optic connectors, focusing on performance, features, and application suitability - especially in high-power and rugged environments.
1. SMA905 vs FC/PC and FC/APC
| Feature | SMA905 | FC/PC | FC/APC |
|---|---|---|---|
| Power Handling | ★★★★★ (very high, up to 100s of watts) | ★★☆☆☆ (low to medium) | ★★★☆☆ (medium) |
| Ferrule Diameter | 2.5 mm | 2.5 mm | 2.5 mm |
| Ferrule Material | Stainless steel or ceramic | Ceramic | Ceramic |
| Polish Type | Flat or slightly recessed | Physical Contact (PC) | Angled Physical Contact (APC, 8°) |
| Return Loss (Back Reflection) | Low (unkeyed flat contact) | ~-40 dB | ~-60 dB (better for reflections) |
| Alignment | Non-keyed, not ideal for single-mode | Keyed | Keyed |
| Vibration Resistance | Excellent | Good | Good |
| Application Fit | High-power lasers, industrial, medical | Telecom, test equipment, sensors | High-precision metrology, telecom |
Conclusion:
SMA905 is far superior in high-power handling but lacks the low-reflection performance and precise alignment needed for single-mode or telecom use. FC/APC is ideal for reflective-sensitive applications like interferometry.
2. SMA905 vs ST and SC
| Feature | SMA905 | ST | SC |
|---|---|---|---|
| Power Handling | ★★★★★ | ★☆☆☆☆ | ★★☆☆☆ |
| Ferrule Size | 2.5 mm | 2.5 mm | 2.5 mm |
| Material | Metal body, metal/ceramic ferrule | Plastic or metal body, ceramic ferrule | Plastic body, ceramic ferrule |
| Locking Mechanism | Threaded | Bayonet (twist-lock) | Push-pull snap-in |
| Insertion Loss | Moderate (<1 dB typical) | Low to moderate | Low to moderate |
| Application Fit | Laser power delivery, spectroscopy | Legacy LAN, CCTV systems | Telecom, LAN, PON networks |
| Environmental Robustness | Excellent | Poor to fair | Fair |
Conclusion:
SMA905 is far more durable and power-capable than ST or SC, which are mostly used in low-power data and audio/video transmission applications. ST and SC are rarely used in laser or industrial environments.
3. SMA905 vs LC Connector
| Feature | SMA905 | LC |
|---|---|---|
| Power Handling | ★★★★★ | ★☆☆☆☆ |
| Ferrule Size | 2.5 mm | 1.25 mm (miniature) |
| Material | Full metal body | Plastic body, ceramic ferrule |
| Polish Type | Flat / custom recessed | PC/APC |
| Return Loss | Low (flat-polished) | High (APC) |
| Application | High-power, harsh environments | Data centers, SFP modules, telecom |
| Density & Size | Large | Compact, high-density |
Conclusion:
LC connectors are optimized for small form factor, high-density data systems, not for power. SMA905 is not suitable for rack-dense systems, but ideal for standalone high-power or field-based systems.
4. SMA905 vs E2000 Connector
| Feature | SMA905 | E2000/APC |
|---|---|---|
| Power Handling | ★★★★★ | ★★★★☆ (up to ~3 W, APC) |
| Ferrule | Stainless steel / ceramic, 2.5 mm | Ceramic, 2.5 mm |
| Return Loss | ~-20 dB (flat polish) | ~-65 dB (APC, excellent) |
| Shutter Mechanism | No | Yes (auto-shutter for laser safety) |
| Application Fit | High-power delivery, rugged setups | Laser safety telecom, high-precision |
| Cost | Moderate | High |
Conclusion:
E2000/APC is a premium-grade, high-safety connector for medium-power laser systems and precise metrology. SMA905 is still better for ultra-high-power delivery without precision alignment.
Summary Comparison Table
| Connector Type | Power Handling | Ruggedness | Back Reflection | Alignment Precision | Common Use |
|---|---|---|---|---|---|
| SMA905 | ★★★★★ (Very High) | ★★★★★ | ★☆☆☆☆ (Low) | ★★☆☆☆ (Non-keyed) | Industrial laser, medical, spectroscopy |
| FC/APC | ★★☆☆☆ | ★★★★☆ | ★★★★★ (Very Low) | ★★★★☆ | Telecom, metrology, interferometry |
| ST | ★☆☆☆☆ | ★★☆☆☆ | ★★★☆☆ | ★★☆☆☆ | CCTV, older LANs |
| SC | ★★☆☆☆ | ★★☆☆☆ | ★★★☆☆ | ★★☆☆☆ | Fiber-to-the-home, telecom |
| LC | ★☆☆☆☆ | ★☆☆☆☆ | ★★★★☆ | ★★★★☆ | Data centers, SFP modules |
| E2000/APC | ★★★★☆ | ★★★★☆ | ★★★★★ | ★★★★★ | Precision laser optics, telecom |
When to Use SMA905
Use SMA905 connectors when your application involves:
Optical power levels above 1–5 watts (especially >10 W)
Harsh environmental conditions (vibration, temperature)
Industrial or medical laser systems
Multimode or large-core fibers (e.g., 200 μm, 400 μm, 600 μm, 1000 μm)
No critical need for ultra-low back reflection
