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Product

SAE J1127 Automotive & Heavy-Duty Starter / Ground Battery CablesSAE J112760 V DC (25 V AC)-40 to +125 °C

SGX Cross-Linked Battery CableSAE J1127 Type SGX 60 V DC starter and ground cross-linked polyethylene (XLPE) +125 °C bat

SGX is a heavy-duty SAE J1127 Type SGX starter and ground battery cable engineered for 60 V DC commercial vehicles, heavy-duty trucks, construction machinery, and marine engine rooms operating up to +125 °C. Constructed with rope-lay annealed bare copper condu

Oil, Fuel & Acid
SAE J1127 Flame
-40 to +125 °C
SAE J1127 SGX
Order designation
SGX 1 AWG (42.4 mm²)
Nom. OD
13.40 mm
Copper mass
240.7 kg/km
Total mass ≈
415.0 kg/km
Min. bend R
80.4 mm
All sizes (8)
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 AC
Max 60 V DC
Test voltage
1000 V AC (spark
Dielectric withstand
Operating temp
-40 to +125 °C
Short-circuit +250 °C
Min. bend radius
5 × D
Flexing 8 × D
Primary standard
SAE J1127
SAE J1127 Type SGX; ISO 6722-1 Class C (
Flame rating
SAE J1127 45° fl
Fire & safety compliance

Typical values for this cable type, based on SAE J1127 — confirmed in the datasheet and quotation for your order.

Application fit

Is SGX right for your machine?

Used for high-temperature 12 V / 24 V / 48 V DC starter and ground circuits in Class 8 highway trucks, mining haul trucks, military vehicles, and marine diesel engines.

Motor stator, traction & converter leads

Suitable

Primary +125 °C heavy-duty starter motor and high-output alternator lead for Class 8 trucks and excavators

Switchgear & control cabinet wiring

Suitable

Ideal for chassis frame routing near hot exhaust after-treatment systems and turbochargers

Fixed installation

Suitable

Suitable for clamped battery distribution harnesses on heavy-duty vehicles and marine engines

Trailing & towing

With conditions

Suitable for vehicle battery harnesses; for extra-limp rubber battery leads use SGR

Typical machinesClass 8 Highway Truck Cranking HarnessesMining & Construction EquipmentSoldered & Heavy-Duty Crimped Lug Assemblies

Construction

Layer by layer

Rope-lay bunch-stranded annealed bare copper (SAE J1127); Full-wall cross-linked polyethylene (XLPE) thermoset insulation (SAE J1127 Type SGX, +125 °C); Paper separator wrap over rope-lay copper conductor strands for clean lug stripping; Integral single-layer full-wall cross-linked XLPE battery insulation and jacket (Black or Red).

123
Schematic, not to scale — generated from the layer data
#LayerMaterial & reference
1ConductorRope-lay bunch-stranded annealed bare copper conductor (SAE J1127)SAE J1127
2TapePaper separator wrap for clean terminal strippingSAE J1127
3SheathFull-wall thermoset cross-linked polyethylene (XLPE) +125 °C insulation (Black / Red)SAE J1127

Class 8 Highway Truck Cranking Harnesses

Routes multiple 2/0 AWG or 3/0 AWG battery cables from frame-mounted battery boxes into hot engine compartments.

Mining & Construction Equipment

Provides superior pinch and abrasion resistance against steel chassis brackets and rock debris under +125 °C ambient conditions.

Soldered & Heavy-Duty Crimped Lug Assemblies

Thermoset XLPE insulation will not melt back or shrink away when torch-soldering or hot-crimping heavy copper battery lugs.

Technical data

Ratings & operating limits

Typical values: Typical values for this cable type, based on SAE J1127. Values for your order are confirmed in the datasheet and quotation.

Electrical

Rated voltage (U0/U)
60 V DC (25 V AC)
Max. operating voltage
60 V DC
Dielectric test voltage
1000 V AC (spark/dielectric test per SAE J1127)
Insulation resistance
SAE J1127 high-temperature pinch, abrasion & dielectric compliance

Thermal

Operating temperature range
-40 °C to +125 °C
Dynamic / flexing temperature
-40 °C to +125 °C
Max. short-circuit temperature
+250 °C

Mechanical

Min. bend radius (fixed)
5 × D
Min. bend radius (flexing)
8 × D
Max. tensile pulling load
15 N/mm²
Vibration & mechanical duty
Engine vibration & chassis routing

Resistance

Flame retardancy
SAE J1127 45° flame test (self-extinguishing)
Oil & fluid resistance
SAE J1127 hot oil, diesel fuel, hydraulic fluid & battery acid resistant
UV, weather & ozone
UV, weather, ozone & high-temperature engine-bay thermal aging resistant
Chemical & environmental
Thermoset XLPE resists soldering iron melt-back, sulfuric acid, brake fluid, diesel and road salt

Reference standards

Governing standard
SAE J1127 (2020) — Surface Vehicle Standard — Low Voltage Battery Cable (Type SGX)
Applicable clauses
SAE J1127 Type SGX; ISO 6722-1 Class C (+125 °C)
Secondary reference
ISO 6722-1 — Road vehicles — 60 V and 600 V single-core cables — Class C

Identification

Core identification
Single-core battery conductor (Red for positive +, Black for negative/ground -)
Outer sheath colour
Black or Red
Surface print legend
TEBAOFLEX — SGX — SAE J1127 — <AWG> — 60V DC — -40°C TO +125°C — XLPE

Sizes

8 standard configurations (SGX)

Nominal dimensions, copper weight, total mass and electrical parameters for SGX per SAE J1127.

Dimensions & masses
DesignationSize / ConfigurationStranding · WallNom. OD
mm		Copper
kg/km		Total mass ≈
kg/km		Min. bend R
mm		Enquiry
SGX size schedule
SGX 6 AWG (13.3 mm²)6 AWG (13.3 mm²)133/27 · 1.9 mm8.3091.6158.049.8
SGX 4 AWG (21.2 mm²)4 AWG (21.2 mm²)133/25 · 2.2 mm10.20132.2228.061.2
SGX 2 AWG (33.6 mm²)2 AWG (33.6 mm²)259/26 · 2.4 mm12.30196.0338.073.8
SGX 1 AWG (42.4 mm²)1 AWG (42.4 mm²)259/25 · 2.4 mm13.40240.7415.080.4
SGX 1/0 AWG (53.5 mm²)1/0 AWG (53.5 mm²)259/24 · 2.4 mm14.70295.8510.088.2
SGX 2/0 AWG (67.4 mm²)2/0 AWG (67.4 mm²)259/23 · 2.4 mm16.10364.2628.096.6
SGX 3/0 AWG (85.0 mm²)3/0 AWG (85.0 mm²)259/22 · 2.4 mm17.80452.4780.0106.8
SGX 4/0 AWG (107.2 mm²)4/0 AWG (107.2 mm²)413/23 · 2.4 mm19.60563.8972.0117.6
  • Typical values for this cable type; dimensions and weights for your order are confirmed in the quotation.
  • Dimensions and tolerances conform to SAE J1127.

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
Dielectric voltage withstand & conductor DC resistance1000 V AC (spark/dielectric test per SAE J1127)100 % of production lengths
Sample tests
Insulation wall thickness, hot-set / pinch & cold bendConforms to SAE J1127 sample scheduleEvery production batch
Fluid immersion, flame propagation & thermal agingSAE J1127 45° flame test (self-extinguishing)Type qualification

Inspection certificate

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

Product approvals

SAE J1127 Type SGX; ISO 6722-1 Class C (+125 °C)ISO 6722-1 (2011)RoHS 3 & REACH Compliant

Company certificates

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

Marking & supply

Ordering & delivery

Sheath marking

TEBAOFLEX — SGX — SAE J1127 — <AWG> — 60V DC — -40°C TO +125°C — XLPE
Delivery form
Non-returnable wooden drums, export reels or shrink-wrapped coils
Standard drum lengths
100 m · 250 m · 500 m · 1000 m
MOQ
200 m (stock sizes) · 500 m (custom lengths)
Lead time
2–3 weeks ex-works
Incoterms
EXW, FOB, CIF, DAP

Technical documents

Downloads

PDFSGX Cross-Linked Battery Cable – technical datasheet8 sizes · construction, technical data, approvalsXLSXSGX spec data (Excel)All 8 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 SGX differ from SGT battery cable?
While SGT uses thermoplastic PVC limited to +80/+105 °C that can soften under severe starter stall currents, SGX uses thermoset cross-linked polyethylene (XLPE) rated to +125 °C continuous and +250 °C short-circuit, offering far greater pinch, abrasion, and heat resistance.
What is the difference between SGX and STX?
Both SGX and STX use cross-linked XLPE insulation rated from -40 °C to +125 °C per SAE J1127. SGX has a standard full-wall insulation thickness, whereas STX features a reduced thin-wall XLPE profile for weight and space savings in tightly packed harnesses.
Is SGX suitable for 48 V mild-hybrid commercial vehicle architectures?
Yes. SAE J1127 Type SGX is rated for 60 V DC (25 V AC) service, making it fully compliant with 12 V, 24 V, and 48 V DC automotive electrical architectures.
What voltage and temperature ratings apply to SGX under SAE J1127?
SGX is rated for 60 V DC (25 V AC) (maximum operating voltage 60 V DC, dielectric test voltage 1000 V AC (spark/dielectric test per SAE J1127)) and continuous operation from -40 °C to +125 °C (short-circuit up to +250 °C) per SAE J1127.

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03Message for our engineers

SGX Cross-Linked Battery Cable

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