TEBAOFLEX SY 300/500 V Steel Wire Braided Control Cable is a mechanically reinforced flexible multicore interconnect engineered for industrial automation, CNC machining centers, bottling/packaging lines, and conveyor control circuits. Placed between an extruded inner bedding and the outer jacket, its galvanized steel wire braid (GSWB) shields Class 5 copper cores against metal swarf, foot traffic, crushing, and vibration—available in both standard PVC (YSLYSY) and low-smoke zero-halogen LSZH (HSLHSH) fire-safety compounds.
1. Application Scope & SY vs. YY / CY Selection Matrix
Engineers specify SY armoured flexible control cable wherever unarmoured PVC control leads suffer mechanical nicks or crushing, yet rigid SWA (steel wire armoured) building cable is too stiff to route into machine-tool junction boxes:
- CNC Machine Tools, Stamping Presses & Robotics Cells: Protects
24 V DCPLC I/O, solenoid valves, and300/500 Vauxiliary drives against hot machining chips, vibration, and workshop abrasion. - Conveyor, Bottling, HVAC & Material-Handling Lines: Flexible interconnection between floor cabinets, field junction boxes, limit switches, and motor starters under moderate physical stress.
- Public Infrastructure, Marine & Confined Plant Halls (HSLHSH LSZH): Halogen-free low-smoke variant compliant with
IEC 60754-1/2andIEC 61034-1/2to protect evacuation routes and sensitive electronics from corrosive acid gas.
| Cable Family | Braid / Screen Layer | Primary Engineering Role | Key Selection Boundary |
|---|---|---|---|
| YY / YSLY | Unbraided | General flexible indoor control wiring under low mechanical stress | No metallic protection against impact, swarf, or rodent/crush hazards |
| CY / LiYCY / CVV-S | Tinned copper braid or copper tape | Low transfer-impedance EMC / EMI shielding for VFD & analog signals | Soft copper screen offers minimal crush or cut-through resistance |
| SY (YSLYSY / HSLHSH) | Galvanized steel wire braid (GSWB) | Flexible mechanical armouring against abrasion, cuts & vibration | Steel braid is mechanical armour, not a substitute for a copper EMC screen |
Read our detailed YY vs. SY flexible control cable selection guide, or compare unarmoured YY / YSLY 300/500 V control cable, copper-screened CVV-S 600 V screened control cable, and the full industrial and control cable catalog.
EMC & Drag-Chain Engineering Boundary: Galvanized steel wire has significantly higher high-frequency transfer impedance than tinned copper—never rely on SY braid alone for VFD or high-frequency EMI compliance. In addition, SY cable is rated for fixed installation (4 × OD) and free occasional flexing without tensile load (10–12.5 × OD), not continuous high-speed drag-chain or drum-reeling duty.
2. Cable Construction & Core Identification Codes
Every TEBAOFLEX SY 300/500 V cable is manufactured in a concentric 5-layer industrial construction:
3. Technical Operating Data (PVC YSLYSY vs. LSZH HSLHSH)
Electrical, thermal, mechanical, and fire-performance specifications across both material systems are listed below:
| Parameter | PVC Variant (SY / YSLYSY) | LSZH Variant (SY-LSZH / HSLHSH) |
|---|---|---|
| Rated Voltage U0/U | 300/500 V AC | 300/500 V AC |
| AC Factory Test Voltage | 2,500 V to 4,000 V AC (5 min) | 2,500 V to 4,000 V AC (5 min) |
| Fixed Ambient Temperature | -40°C to +80°C | -30°C to +70°C (+80°C option) |
| Occasional Flexing Temperature | -5°C to +70°C | -5°C to +70°C |
| Minimum Bending Radius | 4 × OD fixed; 10–12.5 × OD flexing | 4 × OD fixed; 10–12.5 × OD flexing |
| Flame Propagation | IEC / EN 60332-1-2 vertical flame | IEC / EN 60332-1-2 & bunched IEC 60332-3-24 |
| Halogen & Smoke Emission | Standard industrial PVC | Halogen-free IEC 60754-1/2; low smoke IEC 61034-1/2 |
| Standard Sheath Finish | Transparent clear PVC (or Grey/Black) | Grey RAL 7001 LSZH (or Black UV-stabilised) |
4. Reference Specification, Outer Diameter & Weight Table
Popular control and machine-power configurations from 2×0.75 mm² to 5G16 mm² are detailed below (full range covers 0.5 mm² to 35 mm² and core counts up to 61G):
| Part / SKU | Cores × Size (mm²) | Coding | Nominal Inner Bedding OD (mm) | Nominal Outer OD (mm) | Approx. Cu Weight (kg/km) | Approx. Total Weight (kg/km) |
|---|---|---|---|---|---|---|
SY-2X0.75 | 2 × 0.75 | -OZ | 5.4 | 7.6 | 14.4 | 86 |
SY-3G0.75 | 3G0.75 | -JZ | 5.7 | 7.9 | 21.6 | 96 |
SY-4G0.75 | 4G0.75 | -JZ | 6.2 | 8.4 | 28.8 | 112 |
SY-7G0.75 | 7G0.75 | -JZ | 7.3 | 9.7 | 50.4 | 154 |
SY-12G0.75 | 12G0.75 | -JZ | 9.6 | 12.2 | 86.4 | 235 |
SY-2X1.0 | 2 × 1.0 | -OZ | 5.7 | 7.9 | 19.2 | 95 |
SY-3G1.0 | 3G1.0 | -JZ | 6.0 | 8.2 | 28.8 | 108 |
SY-4G1.0 | 4G1.0 | -JZ | 6.5 | 8.9 | 38.4 | 128 |
SY-7G1.0 | 7G1.0 | -JZ | 8.0 | 10.4 | 67.2 | 182 |
SY-12G1.0 | 12G1.0 | -JZ | 10.4 | 13.0 | 115.2 | 278 |
SY-18G1.0 | 18G1.0 | -JZ | 12.5 | 15.3 | 172.8 | 385 |
SY-3G1.5 | 3G1.5 | -JZ | 6.7 | 9.1 | 43.2 | 135 |
SY-4G1.5 | 4G1.5 | -JZ | 7.3 | 9.7 | 57.6 | 160 |
SY-5G1.5 | 5G1.5 | -JZ | 8.1 | 10.5 | 72.0 | 188 |
SY-7G1.5 | 7G1.5 | -JZ | 8.9 | 11.5 | 100.8 | 235 |
SY-12G1.5 | 12G1.5 | -JZ | 11.8 | 14.6 | 172.8 | 362 |
SY-18G1.5 | 18G1.5 | -JZ | 14.0 | 17.0 | 259.2 | 505 |
SY-25G1.5 | 25G1.5 | -JZ | 16.8 | 20.0 | 360.0 | 680 |
SY-3G2.5 | 3G2.5 | -JZ | 8.1 | 10.5 | 72.0 | 186 |
SY-4G2.5 | 4G2.5 | -JZ | 8.9 | 11.5 | 96.0 | 226 |
SY-5G2.5 | 5G2.5 | -JZ | 9.9 | 12.5 | 120.0 | 268 |
SY-7G2.5 | 7G2.5 | -JZ | 11.0 | 13.8 | 168.0 | 342 |
SY-12G2.5 | 12G2.5 | -JZ | 14.6 | 17.6 | 288.0 | 535 |
SY-4G4 | 4G4 | -JZ | 10.6 | 13.4 | 153.6 | 325 |
SY-4G6 | 4G6 | -JZ | 12.2 | 15.2 | 230.4 | 440 |
SY-4G10 | 4G10 | -JZ | 15.4 | 18.8 | 384.0 | 695 |
SY-5G16 | 5G16 | -JZ | 20.6 | 24.4 | 768.0 | 1,240 |
5. Frequently Asked Engineering Questions
What is the primary purpose of the galvanized steel wire braid in SY control cable?
The galvanized steel wire braid (GSWB) provides flexible mechanical armouring against metal swarf, foot traffic, crushing, vibration, and moderate abrasion on industrial machinery without sacrificing routing flexibility like rigid SWA armour. Because steel has higher high-frequency impedance than copper, GSWB should not be treated as a primary EMC screen; specify tinned-copper-braided CY or CVV-S cable where low transfer-impedance EMI shielding is mandatory.
What is the difference between YSLYSY (PVC) and HSLHSH (LSZH) SY cables?
YSLYSY uses flame-retardant PVC core insulation, PVC inner bedding, and a transparent or grey PVC outer sheath that lets maintenance technicians visually inspect the galvanized steel braid. HSLHSH replaces all polymeric layers with low-smoke zero-halogen (LSZH) compounds compliant with IEC 60754-1/2 and IEC 61034-1/2 for tunnels, public buildings, data centers, marine engine rooms, and occupied industrial halls.
What do the suffixes -JZ, -OZ, -JB, and -OB mean when ordering SY cable?
-JZ indicates black numbered cores plus one Green/Yellow protective-earth core (3 cores and above, e.g., 7G1.5 mm²). -OZ indicates black numbered cores with no Green/Yellow core (commonly 2×0.75 or 2×1.5 mm²). -JB indicates HD 308 colour-coded cores with Green/Yellow earth, and -OB indicates colour-coded cores without earth.
Can SY control cable be installed in continuous high-speed drag chains?
No. Standard SY control cable is designed for fixed routing (4 × OD min bend radius) and occasional free movement without tensile stress or forced carrier guidance (10–12.5 × OD). Continuous multi-million-cycle energy chains require dedicated PUR drag-chain cables such as PUR-HF or PUR-C-HF.
How should the galvanized steel wire braid on SY cable be terminated?
Use brass or nickel-plated brass SY braid-clamping glands that mechanically grip the galvanized steel braid 360° at the enclosure entry, preventing braid fray, providing strain relief, and bonding the metallic armour to protective earth per site safety rules.
What details are needed for an accurate SY control cable quotation?
Confirm PVC (YSLYSY) or LSZH (HSLHSH) jacket compound, core count and cross-section (0.5 mm² to 35 mm²), core identification (-JZ, -OZ, -JB, -OB), outer sheath colour (transparent PVC or grey RAL 7001 LSZH/PVC), required fire/CPR test reports, and drum lengths.
Request a Factory Quote for SY PVC (YSLYSY) or LSZH (HSLHSH) Cable
Send your core schedule, PVC or LSZH fire-test requirement, gland OD constraints, and drum quantities. Our engineering team will return complete datasheet dimensions and factory pricing within 24 hours.
