FAKRA Connector Cable Assembly Manufacturing
Custom FAKRA cable assemblies with 100% VSWR and hi-pot testing, automated crimping to ±0.01mm pull-force tolerance, and IP67 overmolded options. DC to 6 GHz performance for automotive, telematics, and RF applications.
Why FAKRA Connectors Demand Precision Assembly
FAKRA (Fachkreis Automobil, a German automotive standards body) connectors are the de facto RF interface in vehicles worldwide. Every GPS antenna, LTE modem, satellite radio, and V2X communication module in a modern car routes through FAKRA. The problem: a poorly crimped or misassembled FAKRA connection doesn't fail obviously — it degrades. A 0.5 dB insertion loss increase at the connector translates to reduced signal-to-noise ratio, dropped connections, and warranty claims that surface months after installation. That's why assembly precision and 100% RF testing aren't optional — they're the difference between a harness that works on the bench and one that works for 15 years in the field.
The USCAR-17 specification defines 14 mechanical keying codes (color-coded) to prevent mismating in dense harness environments. A single vehicle can have 8-12 FAKRA connections, each carrying a different RF service. Getting the color code wrong isn't just a rework issue — it can mean a GPS feed connected to an LTE port, with no way to detect the error without functional testing. Our assembly process includes both visual color verification and electrical validation at every station.
FAKRA Assembly Capabilities
RF Performance Validation
100% VSWR and insertion loss testing on every assembly using calibrated vector network analyzers. We test to your frequency spec, not just a generic pass/fail. Typical VSWR <1.5:1 at 1 GHz, <2.0:1 at 6 GHz for standard RG-174/RG-316 builds.
Precision Crimping
Automated crimping with real-time pull-force monitoring per IPC/WHMA-A-620 Class 3 criteria. Crimp height tolerance ±0.02mm. Every crimp is logged with force-displacement data for full traceability.
IP67 Overmolding
Polyurethane or PVC overmold encapsulation sealing the connector-cable junction against water, dust, and vibration. Meets ISO 20653 IP6K9K for automotive underhood and exterior mounting. Tooling NRE: $1,500–$3,000.
All 14 FAKRA Keying Codes
Complete support for USCAR-17 color codes A through Z. We stock Rosenberger, TE Connectivity, and Amphenol FAKRA bodies. Dual FAKRA (HSD) and FAKRA-to-SMA/FAKRA-to-N-type transitions also available.
Cable Selection Engineering
We help you select the right cable for your frequency and routing constraints: RG-174 for short flexible runs, RG-316 for lower loss, RG-58 for long antenna feeds, or custom low-loss corrugated cables. Bend radius, attenuation, and jacket compatibility all factor in.
Full Traceability & Documentation
Each assembly ships with test data (VSWR plot, insertion loss, hi-pot result), material certificates, and certificate of conformance. Serial-level traceability from raw cable lot to finished assembly per IATF 16949 requirements.
FAKRA Assembly Specifications
How our FAKRA cable assembly capabilities compare against typical industry benchmarks and the governing standards.
| Parameter | Standard (USCAR-17) | Our Capability | Industry Benchmark |
|---|---|---|---|
| VSWR (DC–1 GHz) | ≤1.7:1 | ≤1.5:1 | ≤1.6:1 |
| VSWR (1–6 GHz) | ≤2.5:1 | ≤2.0:1 | ≤2.3:1 |
| Insertion Loss (1 GHz, RG-174) | Not specified | ≤0.3 dB/m | 0.35–0.45 dB/m |
| Crimp Pull-Force Tolerance | Per mfr. spec | ±0.01mm height, ±2N force | ±0.05mm height |
| Hi-Pot Test Voltage | 500 VDC minimum | 500–3000 VDC (application dependent) | 500–1500 VDC |
| RF Testing Coverage | Sample per lot | 100% every assembly | Batch sampling (AQL 1.0) |
| Environmental Sealing | IP5K2K (unmolded) | IP67 / IP6K9K (overmolded) | IP5K2K standard, IP67 optional |
| Defect Rate | Not specified | <0.1% | <0.5% |
Specifications based on USCAR-17 Rev. 5 and ISO 20860-1 road vehicle antenna connector standards. Actual performance depends on cable type and assembly configuration.
FAKRA Assembly Process
Every FAKRA cable assembly follows a controlled process designed to catch RF defects that visual inspection alone cannot detect. Here's what happens from order to shipment.
Design Review & Cable Selection
We review your assembly drawing, confirm FAKRA color code and keying, validate cable type against frequency and bend-radius requirements, and flag any DFM issues. If you're unsure between RG-174 and RG-316, we'll calculate the insertion loss budget for your specific run length.
Incoming Material Verification
FAKRA connectors are verified against manufacturer lot codes and dimensional specs. Cable is checked for OD tolerance, shield coverage percentage, and attenuation at spot frequencies. Non-conforming material is quarantined before it reaches the production floor.
Automated Cable Preparation
Cable is cut to length (±1.0mm tolerance), stripped, and shield prepared using programmable cutting and stripping machines. For coaxial cables, the strip dimensions for dielectric and center conductor are set to the connector manufacturer's specification — typically 4.0mm dielectric exposure and 1.5mm center conductor for standard FAKRA.
Connector Crimping & Assembly
Center contact crimped with force-monitored tooling, then FAKRA body assembled and outer crimp applied. Pull-force testing on the first article and periodic samples confirms crimp integrity. For solder-type FAKRA connectors, we use temperature-controlled soldering with flux residue cleaning per IPC J-STD-001.
100% RF & Electrical Testing
Every assembly is tested on a VNA for VSWR and insertion loss across your specified frequency band. Hi-pot testing at 500–3000 VDC verifies dielectric integrity. Continuity and insulation resistance tests confirm wiring correctness. No assembly ships without a passing test record.
Overmolding (If Required) & Final Inspection
For IP67 assemblies, the connector-cable junction is overmolded with polyurethane or PVC compound, then re-tested for RF performance and subjected to IP verification (water spray per ISO 20653). Final visual inspection, labeling, and packaging per your shipping requirements.
FAKRA vs HSD: Choosing the Right Connector System
This is one of the most common questions we get from automotive harness designers. The decision isn't about which is "better" — it's about signal type and data rate.
| Factor | FAKRA (Single-Ended RF) | HSD (High-Speed Data) |
|---|---|---|
| Signal Type | Single-ended RF | Differential pair |
| Typical Applications | GPS, LTE/5G, V2X, SDARS, DAB | USB, Ethernet, LVDS camera, MOST |
| Frequency / Data Rate | DC to 6 GHz | Up to ~15 Gbps |
| Impedance | 50 ohm single-ended | 100 ohm differential |
| Cable Type | Coaxial (RG-174, RG-316, RG-58) | Shielded twisted pair (STP/UTP) |
| Keying System | 14 color codes (USCAR-17) | Mechanical keying (4 variants) |
| Cost per Assembly | Lower (simpler cable) | Higher (STP cable + 4 contacts) |
Practical guidance: If your signal is an antenna feed — anything that talks to the outside world through RF — use FAKRA. If your signal is data moving between modules inside the vehicle (camera to ECU, USB to head unit), use HSD. Many modern vehicles use both connector systems in the same harness, and we assemble both. The key is not mixing them up in the BOM, which is why our process enforces color-code and connector-type verification at the build station.
Case Study: Automotive Telematics FAKRA Harness
Challenge
An Australian telematics OEM needed 12,000 FAKRA harness assemblies for a fleet management module combining GPS, 4G LTE, and V2X antennas in a single roof-mounted unit. The previous supplier had a 2.3% field failure rate traced to intermittent FAKRA connections caused by inconsistent crimp force and no RF validation on production units. The harness also required IP67 sealing for exterior roof mounting with a -40°C to +85°C operating range.
Solution
We designed a 3-branch FAKRA harness using RG-316 cable (lower loss for the 1.2m GPS run), FAKRA codes D (blue, LTE), A (brown, GPS), and K (orange, V2X). Automated crimping with force-displacement monitoring set to ±2N tolerance on each crimp. 100% VSWR testing at 1575.42 MHz (GPS), 700–2600 MHz (LTE), and 5.9 GHz (V2X). Polyurethane overmold at the branch point and each FAKRA connector for IP6K9K sealing.
Results
Field failure rate dropped from 2.3% to 0.04% across the first 8,000 units deployed (18 months in service). VSWR at 5.9 GHz averaged 1.65:1 — well under the 2.0:1 specification. Per-unit cost reduced 28% versus the previous supplier through cable type optimization (RG-316 instead of RG-58 for shorter runs) and consolidated overmold tooling. Lead time compressed from 10 weeks to 4 weeks for production orders.
Common FAKRA Assembly Applications
Automotive
- ✓GPS/GNSS antenna feeds (FAKRA A, brown)
- ✓Cellular/LTE/5G telematics (FAKRA D, blue)
- ✓V2X DSRC/C-V2X communication (FAKRA K, orange)
- ✓Satellite digital audio (SDARS, FAKRA E, beige)
- ✓Digital audio broadcast (DAB, FAKRA C, black)
- ✓Keyless entry and tire pressure monitoring
Industrial & Telecom
- ✓Base station RF interconnects
- ✓Distributed antenna systems (DAS)
- ✓IoT gateway antenna connections
- ✓Fleet tracking and asset management modules
- ✓Agricultural and mining vehicle telematics
- ✓Rail and transit communication systems
Testing That Catches What Visual Inspection Misses
A FAKRA connector can look perfectly assembled — correct color code, proper crimp, no visible damage — and still have a shield connection that's marginal enough to degrade VSWR at 5.9 GHz. That's the fundamental challenge with RF assemblies: the defects that matter most are invisible without the right test equipment.
Our test protocol runs every assembly through three electrical gates: continuity and insulation resistance (catches opens and shorts), hi-pot at your specified voltage (catches dielectric defects), and full VNA sweep (catches RF performance issues). The VNA data is stored per serial number, so if a field issue surfaces, we can pull the original test plot and compare it against the failure mode.
For automotive programs, we also offer environmental stress screening (ESS) including thermal cycling (-40°C to +85°C, 10 cycles) and vibration per ISO 16750-3 on first articles and periodic production samples.
Frequently Asked Questions
What is the minimum order quantity for FAKRA cable assemblies?▼
Prototype MOQ starts at 25 units for initial validation builds. Production MOQ is 200 units per part number. Lead time is 2-3 weeks for prototypes using standard FAKRA connectors (Rosenberger, TE, Amphenol) and 4-6 weeks for production runs with full testing documentation.
What FAKRA color codes do you support?▼
We manufacture assemblies with all 14 standard FAKRA color codes defined in USCAR-17: A (brown), B (white), C (black), D (blue), E (beige), F (violet), G (grey), H (green), I (red), J (pink), K (orange), L (yellow), M (purple), and Z (water blue). Each color corresponds to a specific mechanical keying to prevent mismating.
What RF performance specifications do your FAKRA assemblies meet?▼
Our FAKRA assemblies maintain VSWR below 1.5:1 from DC to 1 GHz and below 2.0:1 up to 6 GHz. Insertion loss is within 0.3 dB/m at 1 GHz for RG-174 and 0.2 dB/m for RG-316 cables. All assemblies are 100% tested on vector network analyzers per IEC 61726 shielding effectiveness requirements.
FAKRA vs HSD connector — when should I use each?▼
Use FAKRA for single-ended RF signals (GPS, LTE, V2X antennas) operating up to 6 GHz. Use HSD (High-Speed Data) for differential signals like USB, Ethernet, or LVDS camera links where impedance matching at 100 ohms differential matters. FAKRA handles up to ~6 GHz single-ended; HSD handles up to ~15 Gbps differential. Many vehicles use both: FAKRA for antenna feeds, HSD for camera and infotainment data.
Can you overmold FAKRA connectors for IP67 waterproofing?▼
Yes. We offer IP67 and IP6K9K overmolded FAKRA assemblies using polyurethane or PVC overmold compounds. The overmold encapsulates the crimp junction and cable entry, sealing against water ingress per ISO 20653. Overmold tooling adds 2-3 weeks to initial lead time and approximately $1,500-$3,000 in NRE depending on connector body style.
What cable types are compatible with FAKRA connectors?▼
Common cable types include RG-174 (1.8mm OD, flexible, short runs), RG-316 (2.5mm OD, better loss), RG-58 (4.9mm OD, low loss, longer runs), and low-loss corrugated cables for base station applications. We also assemble FAKRA on custom shielded twisted pairs for combined RF/power applications. Cable selection depends on frequency, run length, and bend radius requirements.
What files do you need to quote a FAKRA cable assembly?▼
We need: (1) assembly drawing showing connector types, cable spec, and length with tolerances, (2) FAKRA color code and keying requirement, (3) electrical test specifications (VSWR, insertion loss limits, hi-pot voltage), (4) annual volume estimate and target pricing. 3D CAD (STEP) of any overmold is helpful but not required for initial quote — we can design the overmold from your connector and cable selections.
Need a FAKRA assembly quoted for your project?
Request a QuoteRelated Services
Overmolding
IP67/IP6K9K overmold encapsulation for waterproof FAKRA assemblies and environmental protection.
Automotive Wire Harnesses
Full vehicle harness manufacturing including FAKRA, HSD, and power distribution assemblies.
Cable Assembly Testing
100% electrical and RF testing including VSWR, insertion loss, hi-pot, and environmental validation.
Custom Cable Assembly
Full-service custom cable assembly from prototype through production with engineering support.
Get Your FAKRA Assembly Quoted Today
Send us your assembly drawing and we'll return a detailed quote with cable selection recommendations, test specifications, and lead time within 24 hours. No minimum order too small for prototype builds.