AIRBORN RM322-071-221-2900
- 71-position 3-row rectangular connector configuration
- Gold-plated beryllium copper contacts for reliable connectivity
- 3A current rating per contact with 750V voltage rating
- MIL-DTL-55302 qualified for aerospace applications
- Through-hole board mount with straight orientation
In aerospace and defense systems, reliable high-density electrical connections are essential for integrating complex avionics and satellite electronics. The AIRBORN RM322-071-221-2900 is a MIL-SPEC rectangular connector designed to meet these demanding requirements, providing a compact solution for connecting multiple signal and power lines in space-constrained environments.
This connector features gold-plated beryllium copper contacts that maintain reliable connectivity even after thousands of mating cycles, while its robust PPS housing material offers exceptional resistance to harsh chemicals and extreme temperatures. The through-hole board mount design ensures secure installation, making it suitable for critical applications where vibration and shock resistance are paramount.
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The AirBorn RM322-071-221-2900 is a MIL-DTL-55302 qualified rugged rectangular receptacle (female, straight) from the R Series — 71 contacts, 3 rows, 0.075″ (1.91mm) pitch, plated through-hole termination, PPS housing, −65°C to +125°C. It is the 71-contact variant of the same RM322 straight receptacle family as the RM322-059-221-2900, adding 12 additional contacts while retaining identical mechanical mounting, housing material, contact specifications, and MIL-DTL-55302 qualification. The 71-contact count is specified when the 59-contact arrangement is insufficient to route all required signals on a single connector interface, avoiding the complexity and weight penalty of a second connector pair.
RM322 Straight Receptacle Selection Guide
| Parameter | RM322-059-221-2900 | RM322-071-221-2900 |
|---|---|---|
| Contacts | 59 | 71 |
| Rows | 3 | 3 |
| Pitch | 0.075″ (1.91mm) | 0.075″ (1.91mm) |
| Termination | PTH (socket) | PTH (socket) |
| Housing | PPS | PPS |
| Current Rating | 3A/contact | 3A/contact |
| Temp Range | −65°C to +125°C | −65°C to +125°C |
| MIL Spec | MIL-DTL-55302 | MIL-DTL-55302 |
| Contact Plating | Gold | Gold |
| Contact Material | Beryllium Copper | Beryllium Copper |
The RM322-071-221-2900 suits high-density VME/VPX board-to-board interfaces, SBC motherboard connectors, and avionics I/O backplanes where 71 discrete signal and power circuits must be consolidated on a single rugged rectangular connector. The four-point contact wiping system maintains consistent contact resistance through MIL-spec shock (100g) and vibration profiles, and the PPS housing resists all standard aerospace cleaning agents and conformal coatings. Available from Molex (AirBorn) authorized distributors with full MIL-DTL-55302 qualification documentation.
FAQ
What is the difference between RM322-071-221-2900 and RM322-059-221-2900?
Contact count only: 71 vs. 59. All other specifications — pitch, rows, housing, termination, current rating, temperature range, and MIL-DTL-55302 qualification — are identical.
What mating plug is compatible with the RM322-071-221-2900?
The RM372-071-321 (right-angle plug) or RM352-071 (straight plug) series in 71-contact configuration. All R Series plugs and receptacles with matching contact counts are mechanically and electrically interoperable.
Can the RM322-071-221-2900 substitute for the RM322-059-221-2900 on an existing PCB?
No — different contact counts mean different connector body lengths. The 71-contact variant is physically longer than the 59-contact variant and requires a different PCB footprint.
What is the insulation resistance of this connector?
5 GΩ minimum, per MIL-DTL-55302 qualification requirements. The PPS dielectric housing maintains this specification across the full −65°C to +125°C temperature range.
Is this connector interchangeable with other MIL-DTL-55302 products?
Yes. MIL-DTL-55302 mandates interchangeability among all qualified suppliers. The RM322-071-221-2900 is interchangeable with equivalent parts from other MIL-DTL-55302-approved manufacturers of the same contact count and configuration.
What is the four-point contact system and why does it matter?
AirBorn R Series contacts make four discrete wiping contact points per mating cycle rather than the industry-standard one or two. This redundancy maintains consistent contact resistance under vibration, thermal cycling, and repeated mating — critical for avionics and space systems where intermittent contact failure is not acceptable.
