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Product

SAE J1128 North American Automotive Primary Wires60 V DC / 25 V ACSAE J1128 Heavy-Wall XLPE-40 to +125 °C (Class C)

SXL Automotive Cross-Linked Wire60 V DC / 25 V AC SAE J1128 special-purpose heavy-wall XLPE automotive wire (-40 to +125 °

Type SXL (Special Purpose Cross-Linked) is the thickest-walled 60 V DC (25 V AC) cross-linked polyethylene (XLPE) primary wire in SAE J1128 (0.74 mm to 1.09 mm nominal wall across 20–8 AWG). Rated from -40 °C to +125 °C (ISO Class C), it delivers maximum pinch

+125 °C Class C XLPE
Max Pinch & Abrasion
SAE J1128 Type SXL
Order designation
SXL 14 AWG (2.0 mm²)
Max. OD
3.95 mm
Copper mass
17.8 kg/km
Total mass ≈
27.6 kg/km
Min. bend R
19.8 mm
All sizes (12)
Request a quoteDatasheetWhatsApp
Engineering reply in 2 business hoursCut-to-length export drumsEN 10204 3.1 certificate per drum
Rated voltage
60 V DC / 25 V A
SAE J1128 primary harness
Thermal class
-40 to +125 °C
ISO 6722-1 Class C (3000 h)
Gauge range
20 to 8 AWG
0.5 to 8.0 mm² metric equivalent
Wall profile
Heavy wall
0.74 mm @ 20 AWG · 0.81 mm @ 16 AWG
Conductor
Concentric Cu
7/19/37-strand ASTM B3 copper
Min. bend radius
5 × wire OD
Exposed chassis & frame runs

Typical values for this cable type, based on SAE J1128 / ISO 6722-1 Class C — confirmed in the datasheet and quotation for your order.

Application fit

Is SXL right for your machine?

Engineered for heavy-duty Class 8 truck chassis, logging and mining haulers, starter/alternator sense leads, exposed trailer frame harnesses and high-vibration diesel engine mounts.

Fixed installation

Suitable

Withstands direct frame-rail clipping and heavy vibration on truck and off-highway chassis.

Motor stator, traction & converter leads

Suitable

Heavy 0.74–1.09 mm XLPE wall resists hot engine-manifold proximity and +250 °C overload.

Switchgear & control cabinet wiring

Suitable

Ideal for main battery distribution studs, high-current relays and heavy-duty Deutsch connectors.

Motorised monospiral reel

Not suitable

Concentric ASTM B3 copper conductor is designed for fixed vehicle harnesses.

S07HXHX flexible LSZH
Typical machinesClass 8 trucks & semi-trailersMining & quarry haul trucksForestry & logging equipmentMilitary & tactical vehiclesHeavy diesel engine harnesses

Construction

Layer by layer

Symmetrical concentric stranded ASTM B3 bare copper conductor + heavy-wall (0.74–1.09 mm) cross-linked polyethylene (XLPE) insulation + extra-tough colour-coded outer surface.

123
Schematic, not to scale — generated from the layer data
#LayerMaterial & reference
1Concentric stranded copperSymmetrical 7-, 19- or 37-strand annealed bare copper per ASTM B3 / SAE J1128ASTM B3
2Heavy-wall cross-linked XLPEThick-wall electron-beam or silane cross-linked polyolefin (XLPE) compound (-40 °C to +125 °C, 0.74–1.09 mm wall)SAE J1128
3Heavy-duty colour-coded skinIntegral high-scrape-resistance XLPE outer surface with optional tracer stripeSAE J1128

SAE J1128 SXL Bare Copper

Standard heavy-wall XLPE primary wire with concentric bare copper conductor (-40 to +125 °C).

SXL Tinned Copper

Tinned copper strands with heavy-wall XLPE for severe de-icing salt and marine corrosion zones.

Technical data

Ratings & operating limits

Typical values: Typical values for this cable type, based on SAE J1128 / ISO 6722-1 Class C. Values for your order are confirmed in the datasheet and quotation.

Electrical

Rated voltage
≤60 V DC / ≤25 V AC
Wet dielectric test
1.0 kV AC rms for 1 minute
In-line spark test
3.0 kV to 4.0 kV AC rms

Thermal

Continuous operating temp.
-40 °C to +125 °C (3000 h Class C)
Short-term overload / short-circuit
+150 °C (240 h) · +250 °C (5 s)
Cold bend test
-40 °C for 4 hours without cracking

Mechanical

Nom. wall thickness (20 / 18 / 16 AWG)
0.74 mm (20 AWG) · 0.76 mm (18 AWG) · 0.81 mm (16 AWG)
Nom. wall thickness (14 / 12 / 10 / 8 AWG)
0.89 mm (14) · 0.94 mm (12) · 1.04 mm (10) · 1.09 mm (8)
Sandpaper & pinch resistance
Highest pinch and scrape abrasion rating in SAE J1128

Resistance

Flame resistance
Self-extinguishing within 70 s per SAE J1128
Fluid immersion
Diesel, gasoline, hot motor oil, hydraulic oil, DEF & battery acid

Reference standards

Governing standard
SAE J1128 Type SXL & ISO 6722-1 Class C
OEM specifications
Ford ESB-M1L85-A & Chrysler MS-5919

Identification

Colour coding
12 base colours with optional tracer stripes
Surface print
Custom legend or unprinted smooth surface

Sizes

12 standard sizes (SXL)

Nominal dimensions, wall thickness, copper mass and electrical parameters for SXL per SAE J1128 / ISO 6722-1 Class C.

Dimensions & masses
DesignationAWG (Metric mm²)Strands / Wall mmMax. OD
mm		Copper
kg/km		Total mass ≈
kg/km		Min. bend R
mm		Enquiry
SXL size range
SXL 20 AWG (0.5 mm²)20 AWG (0.5 mm²)7/28 · 0.74 mm2.804.910.114.0
SXL 18 AWG (0.8 mm²)18 AWG (0.8 mm²)19/30 · 0.76 mm3.058.915.115.2
SXL 16 AWG (1.0 mm²)16 AWG (1.0 mm²)19/29 · 0.81 mm3.3511.218.516.8
SXL 14 AWG (2.0 mm²)14 AWG (2.0 mm²)19/27 · 0.89 mm3.9517.827.619.8
SXL 12 AWG (3.0 mm²)12 AWG (3.0 mm²)19/25 · 0.94 mm4.6028.240.823.0
SXL 10 AWG (5.0 mm²)10 AWG (5.0 mm²)19/23 · 1.04 mm5.4545.062.027.2
SXL 8 AWG (8.0 mm²)8 AWG (8.0 mm²)19/21 · 1.09 mm6.4071.592.532.0
SXL 18 AWG (16/30)18 AWG (16/30)16/30 · 0.76 mm3.007.613.815.0
SXL 16 AWG (26/30)16 AWG (26/30)26/30 · 0.81 mm3.4012.119.517.0
SXL 14 AWG (41/30)14 AWG (41/30)41/30 · 0.89 mm4.0019.129.020.0
SXL 12 AWG (37/28)12 AWG (37/28)37/28 · 0.94 mm4.6528.841.523.2
SXL 10 AWG (37/26)10 AWG (37/26)37/26 · 1.04 mm5.5045.863.027.5
  • Typical values for this cable type; dimensions and weights for your order are confirmed in the quotation.
  • Dimensions and maximum overall diameters conform to SAE J1128 / ISO 6722-1 Class C.

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
3.0–4.0 kV in-line AC spark test & DC resistanceZero dielectric breakdown; DC resistance per SAE J1128100 % of spools
Sample tests
SAE J1128 heavy-wall pinch & sandpaper abrasion testHighest pinch load and scrape cycle survival in SAE J1128Every lot
3000-hour +125 °C thermal ageing & fluid immersionPasses 1.0 kV wet dielectric after 3000 h at +125 °CType qualification

Inspection certificate

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

Product approvals

SAE J1128 Type SXLISO 6722-1 Class C (+125 °C)Ford ESB-M1L85-AChrysler MS-5919RoHS 3 Compliant

Company certificates

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

Marking & supply

Ordering & delivery

Sheath marking

TEBAOFLEX SAE J1128 SXL 14 AWG (2.0mm2) 60VDC +125C HEAVY-WALL XLPE [lot/spool]
Delivery form
Non-returnable plastic spools, barrel packs or wooden drums
Standard spool lengths
500 m · 1000 m · 2000 m spools (or barrel packs)
MOQ
500 m (stock colours) · 2000 m (striped/custom)
Lead time
2–3 weeks ex-works
Incoterms
EXW, FOB, CIF, DAP

Technical documents

Downloads

PDFSXL Automotive Cross-Linked Wire – technical datasheet12 sizes · construction, technical data, approvalsXLSXSXL spec data (Excel)All 12 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 much thicker is SXL insulation compared with GXL and TXL?
At 16 AWG (1.0 mm²), SXL has a nominal XLPE wall thickness of 0.81 mm (3.35 mm max OD), compared with 0.58 mm on GXL (2.90 mm max OD) and 0.40 mm on TXL (2.40 mm max OD)—providing double the radial dielectric wall of TXL.
Where is SXL specifically required in commercial and off-highway vehicles?
SXL is specified where primary wires exit the main loom to connect frame-mounted sensors, starter solenoids, alternator exciters, hydraulic valves and trailer brake solenoids exposed to gravel spray, vibration and sharp chassis brackets.
Does SXL fit standard Deutsch DT / HD series heavy-duty connectors?
Yes. The 2.80 to 4.60 mm outer diameter of 20–12 AWG SXL is specifically matched to standard rear grommet seals on heavy-duty Deutsch DT, HD10 andHD30 series environmentally sealed connectors.
Can SXL withstand higher temperatures than GXL or TXL?
All three (TXL, GXL and SXL) share the same SAE J1128 Class C (-40 °C to +125 °C continuous, +250 °C short-circuit) cross-linked polyethylene compound; SXL's advantage is mechanical cut-through and pinch resistance rather than a higher temperature class.

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SXL Automotive Cross-Linked Wire

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