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Product

MIL-DTL-17 50 Ω & 75 Ω RF Coaxial CablesMIL-DTL-17 · M17/60-RG14250 Ω · DC–12.4 GHz · +200 °CDouble Silver Braid · PTFE/FEP

RG-142 Double-Shielded Coaxial CableMIL-DTL-17 M17/60-RG142 50 Ω ± 2 Ω SCCS + PTFE + double silver-Cu braids + FEP (-55 to

RG-142 Double-Shielded Coaxial Cable (MIL-DTL-17 M17/60-RG142 / RG-142B/U) is a high-power, high-temperature (-55 °C to +200 °C) 50 Ω ± 2 Ω microwave coaxial cable operating from DC to 12.4 GHz, constructed with a Ø 0.94 mm silver-plated copper-clad steel

Approved
Ozone, UV & moisture
Low-EMC design
EMC screen
Order designation
M17/158-00001 (RG-142 Sweep-Tested 12.4 GHz)
Outer Ø ≈
5.0 mm
Copper weight
36 kg/km
Total weight ≈
64 kg/km
Min. bend R (fixed)
25 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
DC to 12.4 GHz microwave band
Outer diameter
4.95 mm ± 0.13
Matches RG-58 / RG-400 crimp group
Shielding
Double Ag-Cu
2 × ≥95 % silvered Cu (≥ 90 dB)
Temp. rating
-55 to +200 °C
Extruded PTFE core + FEP IX jacket
Velocity (VoP)
69.5 % (0.695 c)
96.5 pF/m · delay 4.79 ns/m
RF power @ 1 GHz
1,100 W CW
1.9 kV RMS working · 5 kV RMS test

Typical values for this cable type, based on MIL-DTL-17/60-RG142 (M17/60-RG142 / M17/158-00001) — confirmed in the datasheet and quotation for your order.

Application fit

Is RG-142 right for your machine?

Engineered for high-power RF transmitters, phased-array radar cabinets, aerospace and naval avionics, semiconductor plasma RF generators (13.56 MHz), and high-temperature test chambers where RG-58

Fixed installation

Suitable

Handles 1,100 W CW at 1 GHz (390 W at 5 GHz) and +200 °C ambient temperatures inside RF amplifier racks.

Switchgear & control cabinet wiring

Suitable

Solder-proof PTFE dielectric will not shrink or melt during SMA, N, TNC, or BNC centre-pin soldering.

Immersion & wet locations

Suitable

FEP fluoropolymer outer jacket is impervious to jet fuel, hydraulic fluids, acids, solvents, and moisture.

Energy chain / drag chain

Not suitable

Solid Ø 0.94 mm SCCS centre conductor is for static/semi-rigid routing; for repeated flexing specify stranded RG-400.

RG-58
Typical machinesRF power amplifiers & radar cabinetsSemiconductor 13.56 MHz plasma toolsAerospace, defense & naval C4ISRHigh-temperature RF test & burn-in

Construction

Layer by layer

Centre conductor: Ø 0.94 mm (19 AWG) solid silver-plated copper-clad steel (SCCS, 40 % IACS) per ASTM B501. Dielectric: Ø 2.95 mm solid

12345
Schematic, not to scale — generated from the layer data
#LayerMaterial & reference
1Silver-plated copper-clad steel (SCCS)Ø 0.94 mm (0.037 in, 19 AWG) solid SCCS conductor per ASTM B501 (high tensile + lowMIL-DTL-17 M17/60-RG142
2Extruded PTFE fluoropolymer dielectricVirgin solid polytetrafluoroethylene (PTFE) extruded to Ø 2.95 mm ± 0.08 mm (-55 to +200MIL-DTL-17 Type F-1
3Inner silver-plated copper braidFirst 36 AWG silver-plated copper wire braid (optical coverage ≥ 95 %)MIL-DTL-17
4Outer silver-plated copper braidSecond direct-contact 36 AWG silver-plated copper braid (combined shielding ≥ 90 dB)MIL-DTL-17
5FEP fluoropolymer jacket (Ø 4.95 mm)Fluorinated ethylene propylene (FEP Type IX) outer jacket in translucent brown (-55 toMIL-DTL-17 Type IX

RG-142B/U (M17/60-RG142) Solid SCCS

Ø 0.94 mm solid SCCS + PTFE + double silver-Cu braids + FEP jacket (DC–12.4 GHz).

RG-400/U (M17/128-RG400) Stranded SPC Equivalent

19×0.20 mm stranded silver-plated copper centre conductor in the identical Ø 4.95 mm double-braided PTFE/FEP

Technical data

Ratings & operating limits

Typical values: Typical values for this cable type, based on MIL-DTL-17/60-RG142 (M17/60-RG142 / M17/158-00001). Values for your order are confirmed in the datasheet and quotation.

Electrical

Characteristic impedance Z0
50 Ω ± 2 Ω
Mutual capacitance
96.5 pF/m (29.4 pF/ft)
Velocity of propagation (VoP)
69.5 % (0.695 c) · time delay 4.79 ns/m
Attenuation (100 / 400 / 1000
12.8 / 26.6 / 44.3 / 84.0 / 160.0 dB/100m
Shielding effectiveness
≥ 90 dB (double silver-plated copper braids)
Operating / dielectric test voltage
1,900 V RMS working · 5,000 V RMS test ·

Thermal

Operating temperature range
-55 °C to +200 °C continuous
CW power rating (0.4 / 1 / 3 / 5
1,800 W / 1,100 W / 580 W / 390 W CW @ 40 °C

Mechanical

Nominal dimensions (Core / PTFE
0.94 mm / 2.95 mm / 4.95 mm ± 0.13 mm
Min. bending radius
5 × D (25 mm) static · 10 × D (50 mm)

Resistance

Chemical & solvent immunity
Inert to aviation fuel, Skydrol, hydraulic
Flame & outgassing
UL 910 CMP / NFPA 262 · FAR 25.853

Reference standards

Primary specification
MIL-DTL-17 / M17/60-RG142 (RG-142B/U) &
Max. operating frequency
12.4 GHz (X-band microwave)

Identification

Dielectric colour
Opaque White virgin PTFE
Outer jacket colour
Translucent Brown-Tinted FEP (per MIL-DTL-17)

Sizes

4 standard configurations (RG-142)

Nominal dimensions, copper weights, impedance and transmission parameters for RG-142 per MIL-DTL-17/60-RG142 (M17/60-RG142 / M17/158-00001).

Dimensions & weights
Order designationConfigurationConductor sizeOuter Ø ≈
mm		Copper
kg/km		Weight ≈
kg/km		Min. bend R
fixed mm		Enquiry
Standard RG-142 configurations
M17/60-RG142 (RG-142B/U) Solid SCCS Double-Braid1×0.94 mm SCCS + PTFE + 2×AgCu0.69 mm² (19 AWG)5.0366425
M17/158-00001 (RG-142 Sweep-Tested 12.4 GHz)1×0.94 mm SCCS (12.4 GHz Swept)0.69 mm² (19 AWG)5.0366425
M17/128-RG400 (RG-400/U) 19×0.20 Stranded SPC19×0.20 mm SPC + PTFE + 2×AgCu0.60 mm² (20 AWG)5.0386325
M17/111-RG303 (RG-303/U) Single-Braid PTFE/FEP1×0.94 mm SCCS + PTFE + 1×AgCu0.69 mm² (19 AWG)4.3224522
  • Typical values for this cable type; dimensions and weights for your order are confirmed in the quotation.
  • Outer diameters and weights are nominal factory values subject to ±5 % manufacturing tolerance per MIL-DTL-17/60-RG142 (M17/60-RG142 / M17/158-00001).

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
DC–12.4 GHz VNA structural return loss / VSWR sweepZ0 = 50 ± 2 Ω; VSWR ≤ 1.30:1 across swept band100 % of reels
5.0 kV RMS dielectric & 1.9 kV corona extinctionMIL-DTL-17/60 high-voltage & partial-discharge pass100 % of reels
Sample tests
Shielding effectiveness & transfer impedance≥ 90 dB isolation (double silver-plated braids)Per production batch
-55 °C cold bend & +200 °C thermal shockMIL-DTL-17 dimensional & electrical stabilityQPL type test

Inspection certificate

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

Product approvals

MIL-DTL-17 / M17/60-RG142FAR 25.853 / UL 910RoHS / REACH

Company certificates

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

Marking & supply

Ordering & delivery

Sheath marking

TEBAOFLEX MIL-DTL-17 M17/60-RG142 RG-142B/U
Delivery form
Non-returnable plywood reels or export drums
Standard reel lengths
100 m · 305 m · 500 m · 1000 m
MOQ
100 m (stock variants) · 500 m (custom)
Lead time
2–3 weeks ex-works
Incoterms
EXW, FOB, CIF, DAP

Technical documents

Downloads

PDFRG-142 Double-Shielded Coaxial Cable – technical datasheet4 sizes · construction, technical data, approvalsXLSXRG-142 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.

Why does RG-142 handle almost 4× the RF power of RG-58 despite having the same 4.95 mm diameter?
Standard RG-58 uses a polyethylene dielectric that softens above +85 °C, limiting 1 GHz CW power to ~78 W. RG-142 uses a solid extruded PTFE dielectric and FEP jacket rated for +200 °C continuous operation plus low-loss silver-plated conductors, allowing up to 1,100 W CW at 1 GHz.
What is the purpose of the double silver-plated copper braid in RG-142?
A single braided shield (as in RG-58 or RG-303) has optical diamond apertures that allow RF leakage above 1 GHz (~50–60 dB isolation). Applying two direct-contact silver-plated copper braids in opposing weave angles increases shielding effectiveness above 90 dB up to 12.4 GHz. Each production reel undergoes 100 % characteristic impedance verification, mutual capacitance and DC loop resistance testing, and dielectric spark/withstand inspection before dispatch with an EN 10204 3.1 certificate.
Do RG-58 and RG-142 use the exact same crimp connectors?
Both share a Ø 2.95 mm dielectric, so the centre pin and dielectric entry match; however, RG-142 has a slightly larger outer braid diameter over the double shield (Ø 4.34 mm vs. Ø 3.60 mm on RG-58). Always select connectors designated for RG-142 / RG-400 (crimp ferrule .213 in / 5.41 mm).
When should I choose RG-400 instead of RG-142?
RG-142 has a solid Ø 0.94 mm silver-plated copper-clad steel (SCCS) centre conductor for lowest attenuation and high tensile strength in fixed harnesses. If the coaxial assembly undergoes repeated flexing or vibration, choose RG-400 (19×0.20 mm stranded silver-plated copper). Each production reel undergoes 100 % characteristic impedance verification, mutual capacitance and DC loop resistance testing, and dielectric spark/withstand inspection before dispatch with an EN 10204 3.1 certificate.

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RG-142 Double-Shielded Coaxial Cable

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