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J1939 CAN Bus Cable for Heavy-Duty Vehicles — SAE-Compliant, Ships in 3–4 Weeks
Engineered for SAE J1939 networks in heavy-duty trucks, agricultural machinery, and construction equipment. CASPLAST CAN-Bus cables maintain signal integrity and electrical performance under extreme temperature, vibration, and chemical exposure.
- ✓ Characteristic impedance 120Ω±5%, rated to −55°C / +150°C
- ✓ Shielded (SAE J1939/11) and unshielded (SAE J1939/15) variants available
- ✓ CASFDAM® irradiation cross-linked insulation — same compound from sample to mass order
About Casmo
Casmo Cable manufactures J1939 CAN bus cable under the CASPLAST , compliant with SAE J1939/11 (shielded twisted pair) and SAE J1939/15 (unshielded). Cables are available in 0.5mm² and 0.8mm² (20AWG / 18AWG), rated to 300V with a characteristic impedance of 120Ω±5% (J1939/11).
- Minimum order quantity is 305 meters per variant
- with a standard lead time of 3–4 weeks from order confirmation.
What Is a J1939 CAN Bus Cable?
A J1939 CAN bus cable is the physical layer medium that carries communications between ECUs (Electronic Control Units) across the SAE J1939 vehicle network — the standard protocol used in heavy-duty trucks, agricultural equipment, and construction machinery. The cable must maintain precise electrical characteristics, particularly characteristic impedance (120Ω±5% for J1939/11), to prevent signal reflections that degrade network performance or cause communication failures.
3 Problems Buyers Run Into
When Sourcing SAE J1939 CAN Bus Cable
Field Failure After Sample Approval
A cable that performs in sample testing can degrade in production if the insulation compound changes between batches. Every CASPLAST cable uses CASFDAM® irradiation cross-linked material — the same compound, the same process, from the sample you approve through to mass order. The cable you test is the cable you receive.
No Way to Verify Compliance
We don't ask buyers to take our word for it. Technical datasheets covering characteristic impedance (120Ω±5%), conductor cross-section, temperature rating, and shielding configuration are available before any purchase order is placed. If your application requires SAE J1939/11 compliance, the datasheet shows exactly where the cable meets the standard.
Managing Multiple Suppliers Across J1939 Variants
Casmo Cable produces cables for SAE J1939/5, J1939/11, and J1939/15 in one facility. If your harness design requires both shielded and unshielded J1939 cable, or multiple conductor sizes, you consolidate to one supplier, one datasheet process, and one point of contact.
Our Product
J1939/11 CASPLAST CAN-Bus 125
Shielded twisted pair CAN bus cable with aluminium/mylar wrap and CASFOAM® irradiation cross-linked insulation, rated to −55°C / +125°C, 120Ω±10%, 300V. Compliant with SAE J1939/11. Available in 0.5mm² and 0.8mm² for chassis and cab harness routing in heavy-duty vehicles and harsh environments.
J1939/11 CASPLAST CAN-Bus 150
SAE J1939/11 shielded CAN bus cable rated to −55°C / +150°C — the highest temperature rating in the CASPLAST J1939/11 range. Aluminium/mylar shield with bare or tin-plated copper drain wire and CASFOAM® insulation. Engineered for engine-adjacent mounting and EMI-sensitive zones in heavy-duty vehicles.
J1939/15 CASPLAST CAN-Bus 125
Unshielded twisted pair CAN bus cable compliant with SAE J1939/15, rated to −55°C / +125°C with CASFOAM® irradiation cross-linked insulation, 120Ω±10%, 300V. Available in 0.5mm² and 0.8mm² for trailer, cabin, and low-EMI routing where shielding is not required.
J1939/15 CASPLAST CAN-Bus 150
Unshielded SAE J1939/15 CAN bus cable with extended temperature rating to −55°C / +150°C and CASFOAM® irradiation cross-linked insulation, 120Ω±10%, 300V. Delivers J1939/15 cost efficiency with wider thermal tolerance for high-temperature exterior and outdoor vehicle harness routing.
Check Our Technical Specification
Parameter | Value / Range | Recommend Application |
|---|---|---|
Conduction | Bare copper, 0.5mm² / 0.8mm²(20AWG/18AWG) | Data & signal circuits in J1939 CAN bus networks |
Insulation | CASFDAM irradiation cross-linked material | Consistent batch to batch dielectric performance |
Shield(J1939/11) | Aluminium/mylar + bare or tin-plated copper drain wire | EMI-sensitive vehicle networks, engine bay wiring |
Jacket | Modified irradiation cross-linked material | All J1939 variants in heavy-duty vehicle environments |
Impedance | 120Ω±5% (J1939/11) / 100Ω±10% (J1939/15) | CAN bus signal integrity across full network topology |
Operating Voltage | 300V | Standard SAE J1939 vehicle network circuits |
Temperature (CAN-Bus 150) | −55°C to +150°C | Engine bay, turbo-adjacent, high-heat mounting zones |
Temperature (CAN-Bus 125) | −55°C to +125°C | Standard cab and chassis routing |
Chemical Resistance | Fuel, mineral oil, acid, base | Under-hood, drivetrain, and equipment harness routing |
Mechanical | Cut-through and abrasion resistance | Exposed routing in heavy vehicle harnesses |
SAE J1939/11 vs SAE J1939/15: Which Cable Does Your Application Need
The two most common SAE J1939 physical layer specifications are not interchangeable. Choosing the wrong variant for your installation environment affects signal integrity and long-term cable performance. The decision comes down to four factors: EMI exposure, operating temperature, routing location, and cost sensitivity.
Feature | SAE J1939/11 — Shielded | SAE J1939/15 — Unshielded |
|---|---|---|
CASPLAST Model | CAN-Bus 125 / CAN-Bus 150 | CAN-Bus 150 |
Shield Construction | Aluminium/mylar + drain wire | None |
Impedance | 120Ω±5% | 100Ω±10% |
Max Temperature | +150°C (CAN-Bus 150) | +60°C |
Min Temperature | −55°C | −15°C |
EMI Protection | Yes | No |
Typical Routing Zone | Engine bay, chassis, high-EMI zones | Trailer, cabin, low-EMI exterior |
Cost Per Meter | Higher | Lower |
Choose SAE J1939/11 If:
- Cable routes through or near the engine bay
- Operating temperature exceeds +60°C
- High-EMI environment: motors, inverters, or ignition systems nearby
- SAE J1939/11 compliance documentation is required by your customer or specification
Choose SAE J1939/15 If:
- Cable routes in trailer, exterior body, or cabin sections
- Operating temperature stays within −15°C to +60°C
- EMI environment is controlled or shielding is not specified
- Cost per meter is a significant factor in project economics
What's Applications Across Vehicle and Equipment Types
Vehicle / Equipment Type | Recommended CASPLAST Variant | Key Specifications |
|---|---|---|
Heavy-Duty Trucks & Coaches | CAN-Bus 150 (SAE J1939/11) | −55°C to +150°C, shielded, 120Ω±5% |
Agricultural Machinery | CAN-Bus 125 or 150 (SAE J1939/11) | Fuel & oil resistant jacket, shielded, vibration-tested |
Construction Equipment | CAN-Bus 125 (SAE J1939/11) | EMI shielded, −55°C to +125°C, abrasion-resistant |
Military & Off-Road Vehicles | CAN-Bus 150 (SAE J1939/11) | Full temp range −55°C / +150°C, cut-through resistance |
Marine & Inland Vessels | CAN-Bus 125 (SAE J1939/11) | Moisture-resistant jacket, chemical resistance, shielded |
Trailers & Low-EMI Zones | CAN-Bus 150 (SAE J1939/15, unshielded) | 100Ω±10%, −15°C to +60°C, lower cost per meter |
Why Engineers and Procurement Teams Specify Casmo Cable
Proprietary CASFDAM® Insulation
Developed in-house and used in every production run. Consistent dielectric performance from the sample you approve through every meter of your order — not just on the reel you tested.
Rated to −55°C / +150°C
CAN-Bus 150 (J1939/11) handles engine-adjacent mounting positions where most cables reach their limit at 105°C or 125°C. No derating required for high-heat installation zones.
Full J1939 Standard Coverage
SAE J1939/5, J1939/11, and J1939/15 manufactured in one facility. Multi-standard harness projects handled by one supplier with one point of contact.
Datasheet Before You Commit
Impedance values, conductor specs, shielding construction, and temperature ratings available before any order is placed. Verify compliance without relying on a sales claim.
Standards and Compliance
All CASPLAST CAN-Bus cables are manufactured in compliance with the applicable SAE J1939 physical layer standards.
Technical datasheets documenting compliance parameters are available before any order is placed.
J1939
J1939/11
J1939/15
Tailored Solutions for Your Project
Every vehicle harness has different requirements. If your application falls outside the standard CASPLAST range — in conductor size, temperature rating, reel length, or jacket specification — our engineering team works directly with your design or procurement team to identify the right configuration before production begins.
- Custom conductor sizes and cross-sections
- Non-standard reel lengths (minimum 305m)
- Custom jacket colors for color-coded harness assemblies
- OEM and private-label options
- Small-batch and project-specific orders
- Full technical consultation for cable selection and harness integration
Standard Lead Time: 3–4 Weeks
From order confirmation to dispatch. This applies to all standard CASPLAST CAN-Bus variants — shielded J1939/11 and unshielded J1939/15 — in 0.5mm² and 0.8mm² conductor sizes.
What Procurement Teams Say
Frequently Asked Questions
The minimum order quantity is 305 meters per variant. This applies to all CASPLAST CAN-Bus configurations, including shielded SAE J1939/11 and unshielded SAE J1939/15. If you need a smaller quantity for prototyping or technical evaluation, contact us to ask about sample availability.
Standard lead time is 3–4 weeks from order confirmation. Lead time may extend for very large volumes or configurations outside the standard range. We recommend contacting us early in your project schedule to confirm current production availability.
Yes. The CASPLAST CAN-Bus 125 and CAN-Bus 150 (J1939/11 variants) are manufactured to SAE J1939/11 specifications, including shielded twisted pair construction with aluminium/mylar wrapping and drain wire, 120Ω±5% characteristic impedance, and the conductor cross-sections defined in the standard. Technical datasheets are available on request before any order is placed.
CASPLAST J1939 CAN bus cables are available in 0.5mm² (20AWG) and 0.8mm² (18AWG) conductor cross-sections. Both sizes are available in shielded (J1939/11) and unshielded (J1939/15) configurations.
SAE J1939/11 specifies a shielded twisted pair cable — aluminium/mylar wrap plus a drain wire — for installations where electromagnetic interference is a concern. SAE J1939/15 specifies an unshielded twisted pair for applications where EMI shielding is not required and cost reduction is a priority. J1939/11 uses 120Ω±5% impedance; J1939/15 uses 100Ω±10%. Casmo Cable manufactures both variants.
The CASPLAST CAN-Bus 150 (J1939/11) is rated for −55°C to +150°C, suitable for engine-adjacent mounting. The CAN-Bus 125 (J1939/11) covers −55°C to +125°C. Both use CASFDAM® irradiation cross-linked insulation, which maintains dielectric properties across the full rated temperature range.
Two cables can have identical impedance ratings on their datasheets but use different insulation compounds. If one supplier uses a generic cross-linked compound and another uses a dedicated formulation like CASFDAM®, the dielectric stability under temperature cycling, vibration, and chemical exposure will differ — and that difference often doesn’t appear until field conditions are applied. We use the same CASFDAM® compound from sample through mass production.
Yes. All CASPLAST CAN-Bus cables show verified resistance to acid, base, mineral oil, and fuel. The jacket and insulation materials are selected for heavy-duty vehicle environments where fluid exposure is a regular operating condition, not an edge case.
Yes. We can accommodate custom reel lengths, jacket colors, or conductor specifications outside the standard range. We also offer OEM and private-label options. Contact our team with your technical requirements and we will confirm feasibility and provide a lead time and quote.
Use the contact form on this page and specify which variant you need — J1939/11 or J1939/15, and the conductor size (0.5mm² or 0.8mm²). We respond within 24 hours with the relevant datasheet covering impedance values, conductor specs, temperature ratings, and shielding configuration.
Tell Us What You Need
Share the cable variant (J1939/11 or J1939/15), conductor size, and approximate quantity. We respond within 24 hours with a quote or datasheet — whichever moves your project forward.
