Product Overview

M29504

MIL-PRF-29504 (formerly MIL-T-29504) is a military performance specification that defines requirements for removable fiber optic termini. These termini are the critical components within a fiber optic connector that house and protect the optical fiber, ensuring precise alignment and reliable optical performance. M29504 termini are designed for use in harsh environments, particularly within military-grade circular connectors like MIL-DTL-38999 Series III and MIL-PRF-28876. These termini typically feature high-quality zirconia ceramic ferrules, precision alignment sleeves, and robust designs to withstand extreme conditions including shock, vibration, temperature cycling, and fluid exposure. They are essential for high-bandwidth data transmission in aerospace, military, land tactical, and shipboard applications where optical integrity and environmental durability are paramount.

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Features and Benefits

  • MIL-PRF-29504 Qualified: Meets stringent military performance specifications.
  • Superior Optical Performance: Low insertion loss, low back reflection, and optimal physical contact.
  • Precision Fiber Alignment: Captivated split zirconia alignment sleeves and self-aligning design for minimal signal loss.
  • Robust Mechanical Performance: Withstands shock, vibration, and repeated mating cycles without degradation.
  • Environmental Resistance: Integrated seals protect against moisture and contaminants.
  • Compatibility: Fits standard size 16 cavities of MIL-DTL-38999 Series III connectors and similar military-style connectors.
  • Versatile Fiber Accommodation: Available for single-mode and multimode fiber.
  • Field Terminable/Repairable: Facilitates efficient termination, polishing, and field repair.
  • Durable Materials: Constructed from robust materials for long-term reliability.

Specifications, Parts, and Filters

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Optical Insertion Loss
0.25 dB avg (single-mode), 0.45 dB avg (multimode)
Optical Return Loss
≥−40 dB (PC polish), ≥−50 dB (UPC/enhanced PC polish)
Operating Wavelengths
850 nm, 1300 nm, 1310 nm, 1550 nm

Mating Durability
500 cycles min (EIA-455-21)
Terminus Mating Force
5 lbs (22.2 N) nominal
Terminus Retention Force
22 lbs (97.9 N) min
Cable Retention Force
25 lbs (111.2 N) min
Ferrule Material
Zirconia Ceramic
Terminus Body Material
Stainless Steel (passivated)
Alignment Sleeve Material
Zirconia Ceramic
Retention Clip Material
Beryllium Copper (or beryllium-free equivalent)
Ferrule Diameter
1.25mm (LC-style) or 2.5mm (ST-style)
End Face Polish
PC, UPC, APC
Weight
1.0 grams max

Operating Temperature
to +150∘C
Temperature Life
+150∘C for 1000 hours
Thermal Cycling
MIL-STD-1344, Method 1003C (or similar)
Thermal Shock
MIL-STD-1344, Method 1003 (or similar)
Vibration
MIL-STD-1344, Method 2005 (e.g., Condition II & VI)
Mechanical Shock
MIL-STD-901C, Grade A (or MIL-STD-1344, Method 2015)
Salt Spray / Corrosion
MIL-STD-202, Method 101 (or MIL-STD-1344, Method 1001)
Pressure Sealing
32 psi (standard), 2,000 psi (with wiper seal option)
Humidity
MIL-STD-1344, Method 1002
Ozone Exposure
MIL-STD-1344, Method 1007

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