AFI Connectors
Blind‑mate board‑to‑board RF connectors with precision float for misaligned PCB designs
Overview
Amphenol RF’s AFI connector series provides a robust board‑to‑board RF interface that maintains signal integrity even when PCBs are misaligned. With a unique two-piece design incorporating an embedded bullet adapter, AFI connectors compensate for radial and axial misalignment, ensuring secure RF performance in precision assemblies. These connectors are available in both 50 Ω (DC–6 GHz) and 75 Ω (DC–3 GHz) variants to suit a range of high-frequency applications.
Engineered for demanding applications in military, broadband, telecom and routing equipment, the AFI series supports robust electrical performance and mechanical durability. Featuring blind-mate, push-on coupling and wear-resistant contacts, these connectors simplify assembly and maintenance in stacked-board configurations.
Features and Benefits
- Blind-mate, push-on interface enables crash-proof and easy PCB-to-PCB connections
- High misalignment tolerance – ±0.8 mm radial and ±1.0 mm axial float minimizes connection issues during assembly.
- Dual impedance support: 50 Ω version operates to 6 GHz, 75 Ω version to 3 GHz
- Flexible PCB mounting options support single and dual-row configurations
- Durable performance with ≥100 mating cycles, resistant to mechanical shock and vibration.
Key Technical Details
- 50 Ω version: DC–6 GHz; 75 Ω version: DC–3 GHz
- Misalignment compensation: 0.8 mm radial, 1.0 mm axial float
- Voltage rating: 335 V RMS continuous; dielectric withstand up to 1000 VRMS
- Insertion loss: 0.1√f (GHz) dB; return loss and VSWR per GHz bands (1.08–1.3)
- Power handling: 200 W @ 2.2 GHz @ 85 °C; operating temperature range −65 °C to +165 °C
Applications
- Military and aerospace – Suitable for rugged board stacking in high-reliability systems
- Broadband routers & switches – Supports floating board arrays and modular signal paths
- Wireless & telecom – Efficient PCB-to-PCB RF routing with alignment tolerance
- Cable modem termination systems (CMTS) – High-density board interconnects with minimal assembly risk
- Backplane and daughterboard mating – Simplifies integration in modular electronics architectures
Browse our complete AFI connector lineup—including 50 Ω and 75 Ω board plug and jack configurations. If you require custom PCB spacing, cable-to-board versions, or specialized coax interfaces, contact our engineering team to develop precision solutions tailored to your system.
Specifications
AFI Connectors
50 Ohm
Electrical
| Impedance | 50 Ohm |
| Frequency Range | DC - 6 GHz |
| Voltage Rating | 335 Volts RMS Max Continuous |
| Dielectric Withstanding Voltage | 1000 VRMS Max |
| VSWR (Return Loss) | |
DC - 1 GHz |
1.08 (-28 dB) Max |
1 - 3 GHz |
1.12 (-25 dB) Max |
3 - 6 GHz |
1.3 (-18 dB) Max |
| Insulation Resistance | 1000 MΩ Min |
| Center Contact Resistance | 5 mΩ Min |
| Outer Contact Resistance | 1 mΩ Min |
| RF Leakage | -70 dB Min (DC - 3 GHz) |
| Insertion Loss | .1 √(f(GHz)) dB Max |
| Power Handling | 200 W @ 2.2 GHz @ 85 ºC |
Environmental
| Temperature Range | −65°C to +165°C |
| Thermal Shock | EIA-364-32, Method A, Condition II, 25 Cycles |
| Corrosion | EIA-364-65, Condition IIA, 336 Hours |
| Vibration | EIA-364-28, Condition V, Letter C, for 120 minutes in each of 3 directions |
| Mechanical Shock | EIA-364-27, Condition A, 3 shocks in each direction (18 total) |
| Moisture Resistance | EIA-364-31, Method III, Condition B |
Mechanical
| Mating Cycles | 100 Min |
| Coupling Mechanism | Push-On |
| Interface Specification | Amphenol RF Proprietary |
| Engagement Force | 0.5 lbs |
| Disengagement Force | 0.5 - 3.0 lbs |
| Mechanical Misalignment | |
Axial |
1.00 mm |
Radial |
0.80 mm |
Min Board to Board Distance |
12.7 mm |
75 Ohm
Electrical
| Impedance | 75 Ohm |
| Frequency Range | DC- 3 GHz |
| Voltage Rating | 335 Volts RMS Max Continuous |
| Dielectric Withstanding Voltage | 1000 VRMS Max |
| VSWR (Return Loss) | |
DC - 2 GHz |
1.11 (-26 dB) Max |
2 - 3 GHz |
1.3 (-18 dB) Max |
| Insulation Resistance | 1000 MΩ Min |
| Center Contact Resistance | 7 mΩ Min |
| Outer Contact Resistance | 1 mΩ Min |
| RF Leakage | -70 dB Min (DC - 3 GHz) |
| Insertion Loss | .1 √(f(GHz)) dB Max |
| Power Handling | 95 W @ 1 GHz @ 25 ºC |
Environmental
| Temperature Range | −65°C to +165°C |
| Thermal Shock | EIA-364-32, Method A, Condition II, 25 Cycles |
| Corrosion | EIA-364-65, Condition IIA, 336 hours |
| Vibration | EIA-364-28, Condition V, Letter C, for 120 Minutes in each of 3 directions |
| Mechanical Shock | EIA-364-27, Condition A, 3 shocks in each direction (18 total) |
| Moisture Resistance | EIA-364-31, Method III, Condition B |
Mechanical
| Mating Cycles | 100 Min |
| Coupling Mechanism | Push-On |
| Interface Specification | Amphenol RF Proprietary |
| Engagement Force | 0.5 lbs |
| Disengagement Force | 0.5 - 3.0 lbs |
| Mechanical Misalignment | |
Axial |
1.00 mm |
Radial |
0.80 mm |
Min Board to Board Distance |
12.7 mm |
Note: These characteristics are typical and may not apply to all connectors.
Connector configurations may affect performance.
Related Resources
Amphenol RF AFI Product Series Solutions Guide
Amphenol RF's AFI product series is a high-performance board-to-board RF connectors designed for compact, high-frequency applications. This solutions guide highlights key features, technical specs, and versatile configurations ideal for telecom, industrial, and broadband systems.
Amphenol RF HD-AFI Product Series Solutions Guide
The Amphenol HD-AFI series is a compact, high-density RF board-to-board interconnect solution designed for demanding applications requiring reliable, high-frequency signal transmission up to 12 GHz. With a robust push-on, closed-entry design, multiple stack height options, and industry-leading float tolerance, it’s ideal for telecommunications, networking, IoT, automotive, and test equipment. The series ensures strong signal integrity in tight spaces and offers high durability with up to 200 mating cycles.
AFI Dart Connector Series
The AFI DART Cut Sheet showcases a cutting-edge RF interconnect solution designed for high-speed, high-reliability applications. The document highlights the DART series' compact, durable design, making it ideal for space-constrained environments while maintaining exceptional signal integrity. Engineered for high data rates and low latency, the DART connectors are built to withstand harsh environmental conditions, ensuring long-term performance and durability.
Board-to-Board Solutions
Amphenol RF's board-to-board solutions provide high-performance interconnect options designed for seamless integration in various applications. These solutions ensure reliable connectivity between PCBs, optimizing space and maintaining signal integrity across different frequencies and environments. The product line includes a variety of connector configurations to meet specific design requirements, supporting a wide range of industries from telecommunications to industrial automation.
Amphenol RF Board-to-Board Connectors: Reliable High-Frequency Solutions!
Amphenol RF offers a cutting-edge range of board-to-board RF connectors, designed for seamless high-frequency signal transmission. These connectors are essential for applications in 5G, IoT, automotive, aerospace, and industrial automation, ensuring reliable and high-performance connectivity in compact designs.
🔹 Key Benefits:
✔️ High-frequency performance
✔️ Secure and durable connections
✔️ Compact & versatile for modern PCB designs
Watch this short to see how Amphenol RF’s board-to-board connectors optimize signal integrity across industries!
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Amphenol RF Technical Demonstration Series: Board-to-Board and Automotive Solutions
Learn more about Amphenol RF's board-to-board and automotive solutions with Amphenol RF Asia product manager, Isabella Zhang.
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Automotive Solutions: https://www.amphenolrf.com/automotive
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