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Product

SAE J1128 North American Automotive Primary Wires60 V DC / 25 V ACSAE J1128 Thin-Wall PVC24 to 8 AWG

TWP Thin-Wall Automotive Wire60 V DC / 25 V AC SAE J1128 thin-wall thermoplastic PVC automotive wire (24–8 AWG)

Type TWP (Thin-Wall Thermoplastic) is a reduced-diameter 60 V DC (25 V AC) SAE J1128 primary wire featuring a 0.40 mm (0.016 in) nominal PVC wall on 24–14 AWG sizes. It cuts harness bundle volume by up to 25 % compared with regular-wall GPT while operating fro

SAE J1128 Fluid Resistant
Self-Extinguishing PVC
SAE J1128 Type TWP
Order designation
TWP 18 AWG (0.8 mm²)
Max. OD
2.20 mm
Copper mass
8.9 kg/km
Total mass ≈
12.1 kg/km
Min. bend R
8.8 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 surface vehicle LV
Thermal class
-40 to +85/+105
SAE Class A (85 °C) / Class B (105 °C)
Gauge range
24 to 8 AWG
0.22 to 8.0 mm² metric equivalent
Wall profile
Thin-wall (0.40m
0.40 mm nominal wall (24–14 AWG)
Conductor
Stranded Cu
ASTM B3 concentric bare copper
Min. bend radius
4 × wire OD
Compact instrument & door looms

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

Application fit

Is TWP right for your machine?

Designed for weight- and space-constrained cabin harnesses, instrument clusters, overhead consoles, infotainment looms and body control modules in cars, trucks and buses.

Fixed installation

Suitable

High-density harness routing through door grommets, A/B pillars and behind instrument panels.

Switchgear & control cabinet wiring

Suitable

Thin 0.40 mm wall fits miniature metric/USCAR sealed and unsealed multi-pin connector cavities.

Trailing & towing

Not suitable

Single-core harness wire must be taped or loomed inside a protective harness assembly.

FLRYY multicore truck cable

Furnace, kiln & high-temp zone

Not suitable

Lead-free thermoplastic PVC is limited to +85/+105 °C; specify TXL for +125 °C engine bays.

TXL +125 °C thin-wall XLPE
Typical machinesAutomotive cockpit & dash harnessesBody & door wiring modulesCommercial truck & bus cabinsAgricultural machinery cabsMarine instrument panels

Construction

Layer by layer

ASTM B3 concentric stranded annealed bare copper conductor + thin-wall (0.40 mm on 24–14 AWG) lead-free thermoplastic PVC insulation + smooth colour/stripe outer skin.

123
Schematic, not to scale — generated from the layer data
#LayerMaterial & reference
1Stranded bare copper conductorConcentric stranded annealed bare copper per ASTM B3 / SAE J1128 (7 or 19 strands)ASTM B3
2Thin-wall thermoplastic PVCHigh-dielectric-strength lead-free polyvinyl chloride (PVC) compound (0.40 mm nominal wall on 24–14 AWG)SAE J1128
3Smooth colour-coded surface skinIntegral low-friction extruded outer skin with optional spiral or longitudinal tracer stripeSAE J1128

SAE J1128 TWP (85 °C Class A)

Standard SAE J1128 thin-wall PVC primary wire for passenger compartment and body harnesses.

TWP-105 (105 °C Class B)

Heat-stabilised +105 °C thin-wall PVC compound matching Chrysler MS-8900 and Ford ESB-M1L120-A.

Technical data

Ratings & operating limits

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

Electrical

Nominal voltage rating
≤60 V DC / ≤25 V AC
Wet dielectric withstand
1.0 kV AC rms for 1 minute after 4 h saltwater immersion
In-line spark test
1.5 kV to 3.0 kV AC rms

Thermal

Continuous temperature rating
-40 °C to +85 °C (Class A) / +105 °C (Class B option)
Cold bend performance
-40 °C for 4 hours around specified mandrel

Mechanical

Nom. wall thickness (24–14 AWG)
0.40 mm (0.016 in)
Nom. wall thickness (12 / 10 / 8 AWG)
0.46 mm (12 AWG) · 0.56 mm (10 AWG) · 0.71 mm (8 AWG)
Sandpaper & scrape abrasion
Meets SAE J1128 thin-wall abrasion resistance

Resistance

Flame retardancy
Self-extinguishing within 70 s per SAE J1128 45° burn test
Automotive fluid resistance
Resists motor oil, fuel, coolant, brake fluid and battery electrolyte

Reference standards

Governing standard
SAE J1128 Type TWP
OEM specifications
Chrysler MS-8900 & Ford ESB-M1L120-A

Identification

Colour coding
Solid base colour with optional tracer stripe
Packaging
High-speed payoff spools or barrel packs

Sizes

12 standard sizes (TWP)

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

Dimensions & masses
DesignationAWG (Metric mm²)Strands / Wall mmMax. OD
mm		Copper
kg/km		Total mass ≈
kg/km		Min. bend R
mm		Enquiry
TWP size range
TWP 24 AWG (0.22 mm²)24 AWG (0.22 mm²)7/32 · 0.40 mm1.552.04.16.2
TWP 22 AWG (0.35 mm²)22 AWG (0.35 mm²)7/30 · 0.40 mm1.703.15.56.8
TWP 20 AWG (0.5 mm²)20 AWG (0.5 mm²)7/28 · 0.40 mm1.954.97.67.8
TWP 18 AWG (0.8 mm²)18 AWG (0.8 mm²)19/30 · 0.40 mm2.208.912.18.8
TWP 16 AWG (1.0 mm²)16 AWG (1.0 mm²)19/29 · 0.40 mm2.4011.214.89.6
TWP 14 AWG (2.0 mm²)14 AWG (2.0 mm²)19/27 · 0.40 mm2.9017.822.311.6
TWP 12 AWG (3.0 mm²)12 AWG (3.0 mm²)19/25 · 0.46 mm3.5028.234.214.0
TWP 10 AWG (5.0 mm²)10 AWG (5.0 mm²)19/23 · 0.56 mm4.3045.053.517.2
TWP 8 AWG (8.0 mm²)8 AWG (8.0 mm²)19/21 · 0.71 mm5.4571.584.521.8
TWP 18 AWG (16/30)18 AWG (16/30)16/30 · 0.40 mm2.157.610.88.6
TWP 16 AWG (26/30)16 AWG (26/30)26/30 · 0.40 mm2.4512.115.89.8
TWP 14 AWG (41/30)14 AWG (41/30)41/30 · 0.40 mm2.9519.123.811.8
  • 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 A/B.

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
AC spark test & conductor DC resistance check100 % spark-tested; DC resistance per SAE J1128100 % of spools
Sample tests
Pinch, sandpaper abrasion & -40 °C cold bendPasses SAE J1128 thin-wall mechanical & cold-bend criteriaBatch sample
3000-hour thermal ageing & fluid immersionVerified at +85/+105 °C and in automotive fluidsType qualification

Inspection certificate

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

Product approvals

SAE J1128 Type TWPChrysler MS-8900Ford ESB-M1L120-AISO 6722-1 Class A / BRoHS 3 Compliant

Company certificates

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

Marking & supply

Ordering & delivery

Sheath marking

TEBAOFLEX SAE J1128 TWP 18 AWG (0.8mm2) 60VDC THIN-WALL PVC [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

PDFTWP Thin-Wall Automotive Wire – technical datasheet12 sizes · construction, technical data, approvalsXLSXTWP 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 space and weight does TWP save compared with regular-wall GPT?
By reducing nominal wall thickness from 0.58 mm (GPT) to 0.40 mm (TWP) across 20–14 AWG sizes, TWP lowers overall wire diameter by roughly 0.55–0.65 mm and cuts insulation weight by 30–35 %, allowing smaller harness bundles through tight door and pillar channels.
When should TXL be selected instead of TWP?
Both TWP and TXL share the exact same 0.40 mm thin-wall dimensions on 24–14 AWG sizes. Choose TWP for cost-effective cabin wiring up to +85/+105 °C; choose TXL (cross-linked polyethylene) for engine bays and circuits requiring +125 °C thermal endurance and solder/short-circuit melt resistance.
What is the European metric equivalent of SAE J1128 TWP?
The European DIN 72551 / ISO 6722-1 equivalent is FLRY-A (concentric 7/19-wire) or FLRY-B (bunched conductor), which similarly uses a reduced-wall plasticized PVC insulation rated up to +105 °C.
Are special crimp terminals needed for thin-wall TWP wire?
Use thin-wall (TW / metric FLR) open-barrel crimp terminals whose insulation crimp wings are sized for the smaller 1.55–2.90 mm outer diameter of 24–14 AWG TWP wire.

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01Selected sizes

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02Reel & motion

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03Message for our engineers

TWP Thin-Wall Automotive Wire

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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: 
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- Exposure (outdoor, water, oil, abrasion): 
- Destination country: 
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