1 / 5

Product

MIL-DTL-17 Fluoropolymer & RF Coaxial CablesMIL-C-17 RG-188A/U50 Ω · DC–3 GHz-55 to +250 °C All-PTFE

RG-188A/U Coaxial CableMIL-C-17 · 50 Ω ± 2 Ω · Ø 2.69 mm · 26 AWG (7×0.17) SCCS · Solid PTFE · SPC braid ·

RG-188A/U (MIL-C-17 / M17/67) is a 50 Ω miniature fluoropolymer coaxial cable rated from -55 °C to +250 °C across DC to 3 GHz. Built with a 26 AWG (7×0.17 mm) silver-plated copper-clad steel center conductor, Ø 1.52 mm solid PTFE dielectric, 95 %

EMC screen
Low-EMC design
Flame-retardant
Oil-resistant
Order designation
RG-188A/U Sintered White PTFE (+250 °C)
Outer Ø ≈
2.69 mm
Metal weight
7.8 kg/km
Total weight ≈
16.4 kg/km
Min. bend R (fixed)
13 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
MIL-C-17 miniature PTFE coax
Outer diameter
2.69 mm (0.106")
Sintered white PTFE tape jacket
Velocity / Cap.
69.5 % · 96.5
Solid virgin PTFE Ø 1.52 mm
Temp. rating
-55 to +250 °C
Exceeds FEP-jacketed RG-316 (+200 °C)
Frequency range
DC to 3 GHz
Low-loss microwave & avionics
Max. voltage
900 V rms
2.0 kV rms dielectric test

Typical values for this cable type, based on MIL-DTL-17 (RG-188A/U / M17/67) — confirmed in the datasheet and quotation for your order.

Application fit

Is RG-188A/U right for your machine?

Selected over RG-316 when ambient temperatures reach +200 °C to +250 °C or when ultra-low-outgassing all-PTFE construction is required inside aerospace, engine nacelles, and vacuum RF systems.

Switchgear & control cabinet wiring

Suitable

Ideal for high-temperature military transceivers, radar T/R modules, and ovenized crystal oscillators.

Furnace, kiln & high-temp zone

Suitable

Sintered white PTFE tape jacket sustains +250 °C continuous service (+50 °C above FEP RG-316).

Fixed installation

Suitable

Resistant to jet fuels, hydraulic fluids, and high-altitude thermal cycling.

Energy chain / drag chain

Not suitable

Tape-wrapped PTFE jacket is not designed for continuous linear drag-chain travel.

S 368 C
Typical machinesAerospace & Turbine Engine InstrumentationMilitary Radar & EW SubassembliesDownhole & Geothermal RF Logging ToolsHigh-Temperature Burn-In Test ChambersVacuum & Semiconductor RF Feedthroughs

Construction

Layer by layer

26 AWG (7×0.17 mm) silver-plated copper-clad steel center, Ø 1.52 mm virgin PTFE dielectric, ≥ 95 % silver-plated copper braid, and fused

1234
Schematic, not to scale — generated from the layer data
#LayerMaterial & reference
1Stranded SCCS center conductor (26 AWG)7 × 0.17 mm (Ø 0.51 mm) silver-plated copper-clad steel wire per ASTM B501MIL-C-17
2Solid virgin PTFE dielectricExtruded polytetrafluoroethylene (PTFE) Type F-1, Ø 1.52 mm ± 0.05 mmMIL-C-17
3Silver-plated copper wire braid38 AWG silver-plated copper wire braid (≥ 95 % optical coverage)MIL-C-17
4Sintered white PTFE tape outer jacketFused polytetrafluoroethylene (PTFE) tape wrap over fiberglass/PTFE binder, white (ØMIL-C-17

RG-188A/U (Sintered White PTFE)

Standard MIL-C-17 construction with fused white PTFE tape jacket for -55 °C to +250 °C continuous duty.

RG-316/U (Extruded Brown FEP)

Identical core and braid with extruded +200 °C FEP jacket (Ø 2.50 mm) for smoother jacket stripping.

Technical data

Ratings & operating limits

Typical values: Typical values for this cable type, based on MIL-DTL-17 (RG-188A/U / M17/67). Values for your order are confirmed in the datasheet and quotation.

Electrical

Characteristic impedance Z₀
50 Ω ± 2 Ω
Nominal capacitance
96.5 pF/m (29.4 pF/ft)
Velocity of propagation (VoP)
69.5 %
Conductor DC resistance
≤ 276 Ω/km at 20 °C
Max. operating voltage
900 V rms
Dielectric withstand test
2.0 kV rms at 60 Hz

Thermal

Operating temperature range
-55 °C to +250 °C continuous
Peak short-term temperature
+290 °C (all-PTFE construction)
Storage temperature range
-65 °C to +250 °C
Flammability rating
Non-flammable UL 94 V-0 / FAR 25.853
Cold-bend rating
-55 °C per MIL-DTL-17
Continuous CW power @ 400 MHz
220 W (@ +40 °C ambient)

Mechanical

Center conductor stranding
7 × 0.17 mm (26 AWG, Ø 0.51 mm)
Dielectric diameter
1.52 mm ± 0.05 mm (0.060 in)
Outer jacket diameter
2.69 mm ± 0.10 mm (0.106 in)
Min. bend radius (fixed / flex)
13 mm (5×D) / 27 mm (10×D)
Nominal cable weight
16.4 kg/km (11.0 lb/1000 ft)
Connector compatibility
SMA, SMB, SMC, MMCX, MCX, BNC

Resistance

Chemical & solvent resistance
Inert to all aviation fuels, oils & acids
Thermal aging stability
Zero melt or flow up to +250 °C
Moisture absorption
< 0.01 % water uptake
Outgassing behaviour
Low outgassing sintered PTFE
UV & ozone immunity
100 % weatherproof PTFE outer wrap
RoHS / REACH status
RoHS 3 compliant

Reference standards

Military specification
MIL-C-17 / MIL-DTL-17 (RG-188A/U)
Conductor standard
ASTM B501 silver-coated CCS
Dielectric & jacket standard
ASTM D4894 polytetrafluoroethylene
Flame test standard
FAA FAR 25.853 & IEC 60332-1-2
RF test standard
IEC 61196-1
Quality certification
EN 10204 3.1 mill certificate

Identification

Dielectric colour
Natural translucent white PTFE
Outer jacket colour
Opaque white sintered PTFE
Surface legend
TEBAOFLEX RG-188A/U 50 OHM 250C PTFE
Standard spool lengths
100 m, 305 m, 500 m
Impedance code
50 Ω +250 °C miniature coax
Batch traceability
Lot number & sweep report

Sizes

4 standard configurations (RG-188A/U)

Dimensional, physical and high-frequency electrical parameters for RG-188A/U per MIL-DTL-17 (RG-188A/U / M17/67).

Dimensions & construction
Order designationConstruction / VariantConductorOuter Ø ≈
mm		Metal
kg/km		Weight ≈
kg/km		Min. bend R
fixed mm		Enquiry
Standard RG-188A/U variants
RG-188A/U Sintered White PTFE (+250 °C)50 Ω Single SPC Braid (PTFE)26 AWG (7×0.17 SCCS)2.697.816.413
RG-316/U Extruded Brown FEP (+200 °C)50 Ω Single SPC Braid (FEP)26 AWG (7×0.17 SCCS)2.507.815.612
RG-188-DS Double-Shielded PTFE (+250 °C)50 Ω Dual SPC Braid (PTFE)26 AWG (7×0.17 SCCS)3.0514.524.015
RG-196A/U Subminiature PTFE (30 AWG)50 Ω Single SPC Braid (PTFE)30 AWG (7×0.10 SCCS)2.034.28.910
  • 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 MIL-DTL-17 (RG-188A/U / M17/67).

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
Sweep impedance & VSWR to 3 GHz50 Ω ± 2 Ω; VSWR ≤ 1.25:1 across DC–3 GHzEvery spool
AC dielectric voltage test2.0 kV rms at 60 Hz without breakdownEvery spool
Sample tests
Attenuation at 400 MHz & 3 GHzWithin MIL-C-17 RG-188A/U attenuation limitsPer lot
+250 °C thermal aging & -55 °C cold bendNo tape delamination or crackingQualification

Inspection certificate

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

Product approvals

MIL-C-17 (RG-188A/U)FAA FAR 25.853RoHS 3 / CE

Company certificates

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

Marking & supply

Ordering & delivery

Sheath marking

TEBAOFLEX RG-188A/U 50 OHM 250C PTFE [Lot]
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

PDFRG-188A/U Coaxial Cable – technical datasheet4 sizes · construction, technical data, approvalsXLSXRG-188A/U 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.

What is the exact difference between RG-188A/U and RG-316/U?
Both cables share the exact same 26 AWG (7×0.17 mm) silver-plated copper-clad steel center conductor, 1.52 mm solid PTFE dielectric, and 95 % silver-plated copper braid; however, RG-188A/U uses a fused white PTFE tape outer jacket rated to +250 °C (Ø 2.69 mm), whereas RG-316/U uses an extruded brown FEP jacket rated to +200 °C (Ø 2.50 mm).
Do RG-188A/U and RG-316/U use the same RF connectors?
Yes, because both share a 0.51 mm center conductor and 1.52 mm dielectric diameter, standard SMA, SMB, SMC, MCX, MMCX, and BNC crimp or solder connectors for the RG-174/188/316 group fit both cables. 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.
Why is the outer jacket of RG-188A/U tape-wrapped rather than melt-extruded?
Virgin PTFE cannot be conventional melt-extruded in thin walls over a copper braid without overheating, so PTFE tape is precision-wrapped and sintered into a unified +250 °C sheath. 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 RG-188A/U be used in high-vacuum chambers?
Its all-PTFE and silver-plated metal construction exhibits very low outgassing; for ultra-high vacuum (≤ 10⁻¹⁰ mbar) where trapped air pockets must be avoided, specify polyimide-insulated 301-KAP50. 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.

Request a quote

Get an engineering quote for RG-188A/U

Your selection and application details are copied into the enquiry form below.

01Selected sizes

Use + Add next to a size or configuration.

02Reel & motion

Add your operating conditions here to include them in your enquiry.

03Message for our engineers

RG-188A/U Coaxial Cable

Selected sizes:


Reel & motion:
- Reel type: 
- Drum core diameter (mm): 
- Cable length on drum (m): 
- Travel speed (m/min): 
- Max. acceleration: 
- Cycles per hour: 
- Length and quantity: 
- Ambient temperature: 
- Exposure (outdoor, water, oil, abrasion): 
- Destination country: 
- Equipment and operating conditions:
Send via WhatsApp

MIL-DTL-17

RG-316

50 Ω +200 °C FEP/PTFE RF Coaxial Cable

View productMIL-DTL-17 (RG-196A

RG-196A/U

50 Ω Subminiature +250 °C PTFE Coaxial Cable

View productMIL-DTL-17

RG-174

50 Ω Miniature Flexible PE/PVC Coaxial Cable

View productUHV Coaxial Spec (≤

301-KAP50 / 301-KAP50-S

50 Ω Polyimide UHV (≤ 10⁻¹⁰ mbar) & Cryogenic Coaxial Cable

View product
DatasheetRequest a quote