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Aerospace & Avionics Data Bus & RF CablesBCB009 / EN 4604-00950 Ω · DC–18 GHz82 % VoP ePTFE · > 95 dB

BCB009 Low-Loss Avionics RF Coaxial CableEN 4604-009 / BCB009 · 50 Ω ± 2 Ω · Ø 4.85 mm · SPC center · Expanded PTFE (82 % VoP) ·

BCB009 Low-Loss Avionics RF Coaxial Cable (EN 4604-009 / Airbus ABS0969 / low-loss RG-400 replacement) is a 50 Ω microwave airframe coaxial cable operating from DC to 18 GHz (-55 °C to +200 °C). By combining a silver-plated copper center conductor

EMC screen
Low-EMC design
Flame-retardant
Approved
Order designation
BCB009 (EN 4604-009) Low-Loss Solid SPC
Outer Ø ≈
4.85 mm
Metal weight
36.0 kg/km
Total weight ≈
56.0 kg/km
Min. bend R (fixed)
24 mm
All sizes (4)
Request a quoteDatasheetWhatsApp
Engineering reply in 2 business hoursCut-to-length export drumsEN 10204 3.1 certificate per drum
Impedance Z₀
50 Ω ± 2 Ω
Swept DC to 18 GHz avionics RF
Outer diameter
4.85 mm (0.191")
Drop-in size for RG-400 / KX 22A
Velocity / Cap.
82 % · 81.0 pF/m
Expanded microporous PTFE core
Composite shield
Flat SPC + SPC
> 95 dB isolation · ultra-low loss
Attenuation @ 1
29.5 dB/100m
~38 % lower loss than RG-400
Temp. rating
-55 to +200 °C
FAR 25.853 & ABD0031 compliant

Typical values for this cable type, based on EN 4604-009 / ABS0969 (BCB009) / MIL-DTL-17 Ref. — confirmed in the datasheet and quotation for your order.

Application fit

Is BCB009 right for your machine?

Specified across commercial airliners, business jets, helicopters, and defense aircraft for L-band transponders (ADS-B / TCAS / DME / Mode S), GNSS/Galileo, 4.3 GHz radio altimeters, SATCOM, and

Fixed installation

Suitable

Saves 15–20 kg/km of airframe harness mass while extending passive antenna run lengths without inline amplifiers.

Switchgear & control cabinet wiring

Suitable

4.85 mm outer diameter fits standard avionics ARINC 600 Size 8/1/5 coax contacts and TNC/SMA/BNC connectors.

Trailing & towing

Suitable

Stranded (or solid low-loss) SPC center and composite flat-strip + braid shield flex smoothly during avionics tray pull-out.

Energy chain / drag chain

Not suitable

Microporous ePTFE microwave coax is built for airframe harnesses, not industrial drag chains.

S 368 C
Typical machinesCommercial Airliner L-Band (TCAS / ADS-B / DME)4.3 GHz Radio Altimeter (RADALT) & 5G FilterAirborne SATCOM (Inmarsat / Iridium / Ka-Ku)Military Radar Warning & EW HarnessesLow-Loss Microwave Test Bench Jumpers

Construction

Layer by layer

Silver-plated copper center conductor (Ø 1.26 mm solid or 19×0.25 mm stranded), Ø 3.30 mm low-density expanded microporous PTFE dielectric

12345
Schematic, not to scale — generated from the layer data
#LayerMaterial & reference
1Silver-plated copper center conductorØ 1.26 mm (solid or 19×0.254 mm stranded) silver-plated oxygen-free copper (largerEN 4604-009 / BCB009
2Expanded microporous PTFE dielectricLow-density tape-wrapped and sintered cellular PTFE (Ø 3.30 mm, εr ≈ 1.48, 81 pF/m)EN 4604-009 / BCB009
3100 % flat silver-plated copper stripHelically wound overlapping flat silver-plated copper ribbon providing a smoothEN 4604-009 / BCB009
4Round silver-plated copper outer braid38 AWG silver-plated copper wire braid (≥ 92 % coverage) achieving > 95–100 dB shieldingEN 4604-009 / BCB009
5Airframe FEP / ETFE fluoropolymer jacketExtruded FEP or UV-laser-markable white/translucent/green fluoropolymer jacket, Ø 4.85ABD0031 / FAR 25.853

BCB009 Standard (Solid Ø 1.26 mm SPC, DC–18 GHz)

Ultra-low-loss airframe trunk coax (29.5 dB/100m @ 1 GHz) for fixed fuselage runs.

BCB009-F Flexible (19-Strand SPC, DC–18 GHz)

Stranded silver-plated center conductor for avionics rack jumpers and vibrating equipment bays.

RG-400 / KX 22A Solid-PTFE Sister (69.5 % VoP)

Traditional solid-PTFE double-braided 50 Ω coax (48.2 dB/100m @ 1 GHz) for short jumpers.

Technical data

Ratings & operating limits

Typical values: Typical values for this cable type, based on EN 4604-009 / ABS0969 (BCB009) / MIL-DTL-17 Ref.. Values for your order are confirmed in the datasheet and quotation.

Electrical

Characteristic impedance Z₀
50 Ω ± 2 Ω
Nominal capacitance
81.0 pF/m (24.7 pF/ft)
Velocity of propagation (VoP)
80.0 % – 82.0 % (4.07 ns/m delay)
Shielding effectiveness
> 95 dB (Flat SPC strip + SPC braid)
Operating frequency range
DC to 18 GHz
Max. operating / test voltage
1,500 V rms / 3.0 kV rms test

Thermal

Operating temperature range
-55 °C to +200 °C continuous
Storage temperature range
-65 °C to +200 °C
Airframe fire & smoke compliance
FAA FAR 25.853, Airbus ABD0031, BSS 7230
Phase vs temperature stability
< 500 ppm across -55 to +125 °C
Cold-bend rating
-55 °C without cracking
Continuous CW power @ 1 GHz
480 W (@ +40 °C ambient)

Mechanical

Center conductor diameter
1.26 mm SPC (vs 0.98 mm in RG-400)
Dielectric diameter
3.30 mm ± 0.08 mm
Outer jacket diameter
4.85 mm ± 0.12 mm (0.191 in)
Min. bend radius (fixed / dynamic)
25 mm (5×D) / 50 mm (10×D)
Nominal cable weight
56.0 kg/km (25 % lighter than RG-400)
Connector compatibility
TNC, SMA, BNC, Type N, ARINC 600 Size 8/5

Resistance

Aviation fluids & Skydrol
100 % resistant to Skydrol LD-4, Jet-A &
High-altitude moisture sealing
Hydrophobic ePTFE core + FEP jacket
HIRF & RADALT 5G rejection
> 95 dB composite flat-strip + braid shield
Wet arc-tracking resistance
Passes EN 3475 / SAE AS4373
Fungus & ozone resistance
Inert fluoropolymer construction
RoHS / REACH status
Aerospace RoHS compliant

Reference standards

European aerospace coax standard
EN 4604-009 / Airbus ABS0969 / BCB009
Legacy French military upgrade
Low-loss replacement for KX 22A / RG-400
US military low-loss reference
MIL-DTL-17 / M17/175 low-loss class
Airframe flammability standard
FAA FAR 25.853 & Airbus ABD0031
Aerospace test method norm
EN 3475 / IEC 61196-1
Quality certification
EN 10204 3.1 + 100 % 18 GHz VNA sweep

Identification

Dielectric colour
White microporous expanded PTFE
Outer jacket colour
Green, White (laser-markable), or Brown FEP
Surface legend
TEBAOFLEX BCB009 / EN 4604-009 50 OHM LOW
Standard spool lengths
100 m, 305 m, 500 m
Impedance group
50 Ω 0.191" low-loss microwave coax
Batch traceability
Aerospace lot number & VNA trace ID

Sizes

4 standard configurations (BCB009)

Dimensional, physical and high-frequency electrical parameters for BCB009 per EN 4604-009 / ABS0969 (BCB009) / MIL-DTL-17 Ref..

Dimensions & construction
Order designationConstruction / VariantConductorOuter Ø ≈
mm		Metal
kg/km		Weight ≈
kg/km		Min. bend R
fixed mm		Enquiry
Standard BCB009 variants
BCB009 (EN 4604-009) Low-Loss Solid SPC50 Ω Flat SPC Strip + SPC Braid (FEP)Ø 1.26 mm SPC4.8536.056.024
BCB009-F Stranded Low-Loss Flex (19×0.25 SPC)50 Ω Flat SPC Strip + SPC Braid (FEP)19×0.25 mm SPC4.9037.558.024
RG-400/U (M17/128) Solid-PTFE Sister Coax50 Ω Dual Round SPC Braids (FEP)20 AWG (19×0.20 SPC)4.9546.574.425
Miniature Low-Loss ePTFE 2.6 mm Coax50 Ω Flat SPC Strip + SPC Braid (FEP)Ø 0.68 mm SPC2.6511.017.513
  • Typical values for this cable type; dimensions and weights for your order are confirmed in the quotation.
  • Dimensions and weights are nominal production values subject to manufacturing tolerances per EN 4604-009 / ABS0969 (BCB009) / MIL-DTL-17 Ref..

Quality & approvals

Testing & inspection

Routine tests on every production length, sample and type tests per batch — documented on an EN 10204 3.1 inspection certificate.

  1. ConductorClass 5 stranding
  2. Spark test100 % in-line
  3. Lay-upCores, earth, fillers
  4. SheathingInner, braid / screen, outer
  5. Electrical testsAC voltage, resistance
  6. DimensionsOD, wall thickness
  7. Inspection documents & dispatchDrum & dispatch
Testing & inspectionTest value / referenceFrequency
Routine tests
100 % swept VNA return loss & attenuation (DC–18 GHz)50 Ω ± 2 Ω; VSWR ≤ 1.25:1 to 6 GHz and ≤ 1.35:1 to 18 GHzEvery spool
3.0 kV rms AC dielectric withstand test3.0 kV rms at 50/60 Hz without breakdownEvery spool
Sample tests
Shielding effectiveness & transfer impedance> 95 dB RF isolation from DC to 18 GHzPer batch
FAR 25.853 / ABD0031 burn & thermal shockPasses vertical burn, smoke/toxicity, and -55/+200 °C cyclingQualification

Inspection certificate

Issued with every drum, listing the routine test results for that length.

Product approvals

EN 4604-009 / BCB009FAA FAR 25.853 / ABD0031DC–18 GHz VNA Certified

Company certificates

ISO 9001ISO 14001ISO 45001VDE marks approvalUL / cULCE · LVD / EMC

Marking & supply

Ordering & delivery

Sheath marking

TEBAOFLEX BCB009 / EN 4604-009 50 OHM LOW
Delivery form
Spools, reels or export wooden drums
Standard reel lengths
100 m · 305 m (1000 ft) · 500 m · 1000 m
MOQ
100 m (stock) · 305–500 m (production)
Lead time
1–3 weeks ex-works
Incoterms
EXW, FCA, FOB, CIF, DAP

Technical documents

Downloads

PDFBCB009 Low-Loss Avionics RF Coaxial Cable – technical datasheet4 sizes · construction, technical data, approvalsXLSXBCB009 spec data (Excel)All 4 sizes with dimensions and data, for your BOM or quotation
Revision
2026-10-20
Updated
2026-10-20

FAQ

Questions engineers ask first

Not covered here? Send your drawing — an engineer replies within 2 business hours.

How does BCB009 achieve ~38 % lower attenuation than RG-400 in the exact same ~4.9 mm outer diameter?
RG-400 uses solid extruded PTFE (dielectric constant εr ≈ 2.1, 69.5 % VoP) and two round wire braids; BCB009 replaces the solid core with low-density expanded microporous PTFE (εr ≈ 1.48, 82 % VoP), which allows a 28 % larger silver-plated copper center conductor (Ø 1.26 mm vs 0.98 mm) for 50 Ω impedance, and replaces the inner round braid with a smooth helically lapped flat silver-plated copper strip.
Why is BCB009 preferred for 1090 MHz ADS-B/TCAS and 4.3 GHz Radio Altimeter (RADALT) runs?
Avionics transponders and radio altimeters have strict maximum cable insertion-loss budgets (often ≤ 3.0 to 6.0 dB per antenna line); at 1 GHz BCB009 loses only 29.5 dB/100 m (vs 48.2 dB/100 m for RG-400), allowing 60 % longer fuselage routing and > 95 dB shielding against 5G C-band interference.
How much weight does BCB009 save on an aircraft compared to RG-400?
At 56.0 kg/km vs 74.4 kg/km for RG-400, BCB009 reduces coaxial cable weight by 18.4 kg per kilometre (~25 % weight savings). Each production reel undergoes sweep-frequency impedance and return-loss verification, dielectric spark testing, and dimensional inspection before dispatch with an EN 10204 3.1 test certificate.
Can BCB009 operate above RG-400's 12.4 GHz ceiling?
Yes, thanks to its low-dielectric-constant ePTFE core and smooth inner flat-strip shield, BCB009 operates mode-free up to 18 GHz. Each production reel undergoes sweep-frequency impedance and return-loss verification, dielectric spark testing, and dimensional inspection before dispatch with an EN 10204 3.1 test certificate. Each production reel undergoes sweep-frequency impedance and return-loss verification, dielectric spark testing, and dimensional inspection before dispatch with an EN 10204 3.1 test certificate.

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BCB009 Low-Loss Avionics RF Coaxial Cable

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