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| | | LEMO USA • 800-444-5366 • www.LEMOusa.com | | |
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| | | Electrical Contact Technical Description The secure reliable electromechanical connection achieved with LEMO female cylindrical contacts is mainly due to two important design features: 1. Prod proof entry on the mating side which ensures perfect concentric mating even with carelessly handled connectors; and 2. The pressure spring, with good elasticity, maintains a constant even force on the male contact when mated. The leading edge of the pressure spring preserves the surface treatment (gold-plated) and prevents undue wear. | | |
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| | | Contact Material and Treatment LEMO female contacts are made of bronze beryllium (QQ-C-530) or bronze (UNS C 54400). These materials are chosen because of their high modulus of elasticity, their excellent electrical conductivity and a high mechanical strength. | | |
| | | LEMO male solder and printed circuit contacts are made of brass (UNS C 38500). Male crimp contacts are made of brass (UNS C 34500) or annealed brass (UNS C 38500) with optimum hardness (HV) for crimping onto the wire. | | |
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| | | | | | | | | | | | | Type | Material (standard) | Surf. treatment (|jm) | | | | Cu Ni Au1) | | | | Male crimp | Brass (UNS C 34500) | | | | | | | Brass (UNS C 38500) | 0.5 | 3 | 1.0 | | | | Male printed circuit | Brass (UNS C 38500) | | | | | | | Female crimp | Bronze (UNS C 54400) | 0.5 | 3 | 1.5 | | | | Female printed circuit | Cu-Be (FS QQ-C-530) | | | | Clips | Cu-Be (FS QQ-C-530) | | | | | | | Stainless steel | | | | | | | Wire2) | Brass | - | 33) | - | | | | | | | | | | | | |
| | | Au Ni Cu | | |
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| | | Bronze or brass | | |
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| | | Notes: The standard surface treatment are as follows: Nickel: FS QQ-N-290A or MIL-C-26074C; and Gold: ISO 4523. 1) Minimum value 2) For elbow printed circuit contacts 3) Treatment completed by 6 |jm Sn-Pb tin-plating | | |
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| | | Thickness comparison between the outside and the inside of female contacts | | |
| | | Gold thickness | | |
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| | | Contact | | |
| | | female | | |
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| | | | | | | | | | | | 0 A (mm) | male (um) | outside (|m) | inside (%) | | | | 0.5 | 1.0 | 1.5 | 65 | | | | 0.7 | 1.0 | 1.5 | 70 | | | | 0.9 | 1.0 | 1.5 | 75 | | | | 1.3 | 1.0 | 1.5 | 75 | | | | 1.6 | 1.0 | 1.5 | 75 | | | | 2.0 | 1.0 | 1.5 | 75 | | | | 3.0 | 1.0 | 1.5 | 75 | | | | 4.0 | 1.0 | 1.5 | 75 | | | | 5.0 | 1.0 | 1.5 | 75 | | | | 6.0 | 1.0 | 1.5 | 75 | | | | 8.0 | 1.0 | 1.5 | 75 | | | | 12.01) | - | - | - | | | | | | | | | | | |
| | | Note: A = inspection point | | |
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| | | Notes: 1) Contacts are silver plated. | | |
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| | | 8 Data Subject to Change | | |
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