FFC/FPC Cable
Thin, flexible flat cables for internal PCB-to-PCB and PCB-to-display connections, ideal for space-constrained assemblies and dynamic flex applications across consumer electronics, medical devices, and automotive systems.
Key Attributes
- Cable Types: FFC (Flat Flexible Cable): laminated PET film with parallel tinned or bare copper conductors; FPC (Flexible Printed Circuit): single-sided, double-sided, or multilayer polyimide (PI) substrate with etched copper traces — both available in ZIF (Zero Insertion Force) and LIF (Low Insertion Force) connector-compatible formats.
- Pitch & Conductor Count: FFC standard pitches: 0.5 mm, 1.0 mm, 1.25 mm, and 2.54 mm; conductor count from 4 to 100+. FPC fine pitches: 0.1 mm to 1.0 mm; up to 200+ positions at 0.5 mm pitch for high-density routing in compact assemblies.
- Conductor Material: Rolled annealed copper (RA-Cu) for dynamic flex applications requiring up to 1,000,000+ bend cycles; electrodeposited copper (ED-Cu) for static routing where cost is the primary constraint; surface finish in pure tin (Sn) or gold (Au).
- Substrate & Insulation: FFC: PET (polyethylene terephthalate) insulation film, operating temperature -20°C to +85°C. FPC: polyimide (PI) substrate, operating temperature -55°C to +125°C; PI offers superior thermal stability and dimensional accuracy for fine-pitch multilayer circuits.
- Electrical Performance: FFC: rated current 0.5–1.0 A per conductor; rated voltage 50–250 V. FPC: rated current 0.3–0.5 A per trace; characteristic impedance controlled to 50 Ω, 90 Ω (USB), or 100 Ω (HDMI/DisplayPort differential pairs) via trace geometry.
Primary Industry Applications
- Consumer Electronics & Computing: FFC cables connecting printer heads to main boards, laptop display panels to motherboards, scanner carriage assemblies, and internal LCD connections in televisions and monitors.
- Smartphones, Tablets & Wearables: FPC circuits routing display, camera module, fingerprint sensor, and battery management signals in sub-1 mm z-height assemblies; 0.2–0.5 mm pitch FPCs enable the pin density required by modern multi-stack smartphone architectures.
- Medical Devices & Diagnostics: Polyimide (PI) substrate FPC assemblies for endoscope head cabling, ultrasound transducer arrays, wearable patient monitoring electrodes, and digital X-ray flat-panel detector interconnects — PI substrate passes biocompatibility requirements and tolerates EtO sterilisation cycles.
- Automotive Electronics: Fully automotive-qualified FPC (rated to +125°C) for instrument-cluster display connections, ADAS camera module flex harnesses, steering-wheel control sub-circuits, and centre-console touchscreen panel interconnects in high-vibration environments.
- Industrial & Robotics: High-flex RA-Cu FPC cables rated for 500,000+ dynamic bend cycles on robot arm joints, pick-and-place machine heads, and CNC axis cable carriers.
Product Overview
FFC vs FPC: Quick Selection Reference
Use this table to identify the correct cable type for your application before specifying pitch and conductor count.
| Attribute | FFC (Flat Flexible Cable) | FPC (Flexible Printed Circuit) |
|---|---|---|
| Substrate Material | PET (polyethylene terephthalate) film | Polyimide (PI) film — Kapton® or equivalent |
| Operating Temperature | -20°C to +85°C | -55°C to +125°C (standard PI); up to +150°C (special grade) |
| Minimum Pitch | 0.5 mm (standard); 0.3 mm (fine-pitch FFC) | 0.1 mm (high-density FPC) |
| Conductor Technology | Parallel flat copper conductors, laminated | Etched copper traces; single/double/multilayer |
| Routing Capability | Straight-line only; no crossovers | Any 2D/3D layout; crossovers via plated through-holes |
| Component Mounting | Not applicable — cable only | SMD/SMT components mountable directly on flex |
| Dynamic Flex Cycles | 5,000–100,000 (high-flex construction) | Up to 1,000,000+ (RA-Cu, optimised design) |
| Rated Current (per line) | 0.5–1.0 A per conductor | 0.3–0.5 A per trace (signal); higher for power traces |
| Rated Voltage | 50–250 V (signal and low-voltage power) | 30–100 V (signal circuits) |
| Impedance Control | Fixed geometry — limited impedance control | Controlled impedance: 50 Ω, 90 Ω, 100 Ω per design |
| Typical Cost | Lower — no tooling, off-the-shelf | Higher — custom tooling, photolithographic process |
| Primary Use Case | Printers, laptops, LCD panels, scanners | Smartphones, medical devices, automotive, robotics |
Key Features and Advantages
| Feature | Description | Benefit |
|---|---|---|
| Rolled Annealed Copper (RA-Cu) for Dynamic Flex | RA-Cu conductor option with layered grain structure per IEC 60028; rated for 100,000 to 1,000,000+ flex cycles at minimum bend radius. | Eliminates premature conductor fracture in printer carriages, robot joints, and hinge-point routings where ED-Cu cracks within tens of thousands of cycles. |
| Polyimide (PI) Substrate for Thermal Stability | FPC substrate in Kapton®-equivalent PI film rated continuously from -55°C to +125°C; dimensionally stable to ±0.05% across the full temperature range. | Maintains fine trace geometry in automotive and industrial environments — PET-based FFC deforms above +85°C. |
| Controlled Impedance Traces (50 / 90 / 100 Ω) | FPC trace geometry calculated and verified by TDR per IPC-2141A to achieve 50 Ω (RF), 90 Ω (USB 2.0/3.x differential), or 100 Ω (HDMI/DisplayPort/Ethernet differential) within ±10%. | Ensures signal integrity on high-speed data lines — uncontrolled impedance causes reflections that reduce maximum data rate and increase bit-error rate. |
| ZIF/LIF Connector Compatibility | All FFC cables produced to ZIF (Zero Insertion Force) or LIF (Low Insertion Force) connector dimensional standards; stiffener thickness and exposed contact length matched to the target connector. | Eliminates contact damage during assembly; ZIF connectors allow cable replacement without tools. |
| UL VW-1 Flame-Rated Substrate | Both PET (FFC) and polyimide (FPC) substrate materials carry UL VW-1 flame rating — self-extinguishing with no burning drip. | Required for internal wiring in consumer electronics (IEC 62368-1) and medical devices (IEC 60601-1). |
| EMI Shielding Layer Option | Aluminium foil with drain wire (for FFCs); specialized flexible EMI Shielding Films or Silver Ink printing available for FPC designs. | Required for MIPI CSI-2 camera, LVDS display, and USB 3.x SuperSpeed FPC signal runs where adjacent RF circuitry generates interference. |
Technical Specifications
| Parameter | FFC Specification | FPC Specification |
|---|---|---|
| Substrate Material | PET (polyethylene terephthalate) | Polyimide (PI), Kapton®-equivalent, 12.5–125 µm |
| Conductor Material | Tinned or bare rolled annealed copper | RA-Cu (dynamic) or ED-Cu (static); 12–35 µm Cu foil |
| Conductor Surface Finish | Pure tin (Sn) or 0.05–0.1 µm gold (Au) | ENIG (0.05 µm Au / 3–5 µm Ni) or OSP at exposed pads |
| Standard Pitch Options | 0.5 mm, 1.0 mm, 1.25 mm, 2.54 mm | 0.1 mm, 0.2 mm, 0.3 mm, 0.5 mm, 0.8 mm, 1.0 mm |
| Conductor / Position Count | 4 to 100+ conductors per cable | 4 to 200+ positions per circuit layer |
| Total Cable Thickness | 0.1 mm (ultra-thin) to 0.3 mm (standard) | 0.05 mm (single-layer) to 0.8 mm (4-layer with stiffener) |
| Rated Current (per line) | 0.5–1.0 A (varies with conductor width and pitch) | 0.3–0.5 A per signal trace; up to 3 A for wide power traces |
| Rated Voltage | 50–250 V (per IPC-6013 construction class) | 30–100 V signal circuits; 250 V with reinforced insulation |
| Operating Temperature | -20°C to +85°C (PET substrate limit) | -55°C to +125°C (standard PI); up to +150°C (high-temp PI) |
| Minimum Bend Radius | 6× cable thickness (static) · 10× thickness (dynamic) | 6× total thickness (static) · 10× thickness (dynamic, RA-Cu) |
| Dynamic Flex Life (RA-Cu) | 5,000–100,000 cycles at rated bend radius | Up to 1,000,000+ cycles (optimised single-layer design) |
| Characteristic Impedance | Not typically controlled | 50 Ω ± 10% (RF) · 90 Ω ± 10% (USB) · 100 Ω ± 10% (HDMI/DP) |
| Flame Rating (substrate) | UL VW-1 | UL VW-1 |
| Compliance Standards | IPC-6013, UL VW-1, RoHS, REACH | IPC-6013 Class 3, IPC-2221, IPC-2141A (impedance), UL VW-1, RoHS, REACH |
Customization & Product Options
We support fully custom FFC and FPC configurations from single-prototype to production volume:
- Pitch & Conductor Count: Standard FFC pitches from 0.5 mm to 2.54 mm, custom pitch available on request; FPC trace pitch from 0.1 mm upward; conductor count specified per application schematic with matched stiffener and ZIF/LIF tab geometry.
- Conductor Type: RA-Cu specified for any dynamic flex application (flex cycles > 5,000); ED-Cu for cost-optimised static routing; conductor thickness 12, 18, or 35 µm selected based on current requirement and minimum trace width.
- FPC Layer Stack: Single-sided (1L), double-sided (2L), or multilayer (4L, 6L) flexible circuits; rigid-flex constructions with bonded FR4 stiffener zones for connector landing areas and SMD component pads.
- Stiffener Material & Position: FR4, polyimide, or stainless steel (SUS304) stiffeners bonded to connector insertion zones; stiffener thickness 0.1–0.5 mm selected to match the target ZIF connector tab insertion depth.
- Shielding: Aluminium foil shielding layer with conductive adhesive available over all or selected signal layers; grounded drain wire on FFC assemblies; shielding specified for MIPI, USB 3.x, and LVDS signal routes.
- Cable Length & Geometry: FFC cut lengths from 25 mm to 1,000 mm; FPC any outline shape in 2D; 3D pre-formed FPC assemblies with defined fold angles available for camera module and sensor head installations.
- Surface Finish at Contact Pads: Pure tin (Sn) for standard ZIF/LIF connectors; ENIG (electroless nickel / immersion gold, 0.05 µm Au min) for fine-pitch FPC pads and repeated mating-cycle ZIF connectors.
Application Scenarios
- Inkjet & Laser Printer Carriage: RA-Cu FFC at 0.5 mm or 1.0 mm pitch connecting the moving print head to the stationary main board; rated for 100,000+ flex cycles across the carriage travel range.
- Laptop LCD & Touchscreen Panel: 0.5 mm pitch FFC from the display panel connector to the LCD driver board; thin 0.2 mm profile routes through the hinge without adding stack height; UL VW-1 substrate required for internal consumer electronics wiring.
- Smartphone Camera Module: 0.2–0.3 mm pitch FPC with MIPI CSI-2 impedance-controlled (100 Ω differential) traces and aluminium foil shield; RA-Cu single-layer for the autofocus flex spring section rated to 500,000+ tilt cycles.
- Wearable Medical Sensor: Ultra-thin (0.08 mm total thickness) single-sided PI FPC for ECG electrode arrays and blood-oxygen sensor flex tails in skin-contact wearables; biocompatible PI substrate, ENIG pad finish, and moisture-resistant acrylic coverlay adhesive.
- Automotive Instrument Cluster Display: Automotive-grade PI FPC (-55°C to +125°C) connecting the TFT cluster display to the instrument ECU; tested to IEC 60068-2-6 vibration (10–2,000 Hz, 98 m/s²).
- Industrial Robot Arm Flex Cable: High-flex RA-Cu multi-layer FPC in the cable carrier of a 6-axis robot arm; minimum bend radius 10× total thickness maintained by designed fold geometry; rated 1,000,000 continuous flex cycles without conductor fracture.
LCSC Sourcing & Support
LCSC offers flexible B2B support with rapid 3–5 day NPI prototyping for custom FPC designs — no tooling surcharge for low-volume first articles — and no minimum order quantity for standard FFC stock items. In-house FPC design review covers trace width and impedance verification per IPC-2141A, bend radius compliance check against IPC-2223, and copper weight recommendation based on current load and minimum flex radius. 100% automated electrical testing on every FPC panel: flying-probe continuity and isolation test (open/short) per IPC-9252, and TDR impedance sampling on controlled-impedance designs. Full material traceability: IPC-6013 class compliance certificates, UL VW-1 substrate reports, conductor material declarations (RA-Cu vs ED-Cu), and RoHS/REACH material data sheets per production batch.
Product Comparison
* LCSC FFC/FPC (This Product) vs Standard FFC (Generic Supplier) vs Round-Wire Harness
| Attribute | LCSC FFC/FPC — This Product ★ | Standard FFC (Generic) | Round-Wire Harness |
|---|---|---|---|
| Conductor Type (Dynamic) | RA-Cu — rated 100,000–1,000,000+ cycles | ED-Cu — rated < 10,000 cycles | Stranded Cu — rated 10,000–100,000 cycles |
| Minimum Pitch | 0.1 mm (FPC) · 0.5 mm (FFC) | 0.5 mm FFC only | Not applicable |
| Operating Temp (PI FPC) | -55°C to +125°C (PI substrate) | -20°C to +85°C (PET only) | -40°C to +105°C (XLPE/GXL) |
| Assembly Height (z-axis) | 0.05–0.3 mm total thickness | 0.1–0.3 mm (PET only) | 3–15 mm (depends on wire gauge and bundle) |
| Impedance Control | 50 / 90 / 100 Ω ± 10% (FPC, TDR verified) | Not available | Not available |
| Routing Complexity | Any 2D/3D layout (FPC); straight-line (FFC) | Straight-line only | Any routing; requires manual dressing |
| Component Integration | SMD components mountable on FPC substrate | Not possible | Not possible |
| Flame Rating | UL 94 V-0 (PI and PET substrate) | UL 94 V-0 (PET only) | IEC 60332-1 (insulation-dependent) |
| Quality Standard | IPC-6013 Class 3 + IPC-2141A impedance test | IPC-6013 Class 1 | IPC/WHMA-A-620 Class 1 or 2 |
| Customisation | Full custom: pitch, layer, shape, impedance | Standard dimensions only | Wire gauge, length, connector — limited |
FAQ
1. What is the difference between FFC and FPC, and how do I decide which one to use?
FFC (Flat Flexible Cable) is a pre-laminated cable with straight parallel copper conductors in a PET film, available off-the-shelf at standard pitches (0.5 mm, 1.0 mm, 2.54 mm) with no tooling cost. FPC (Flexible Printed Circuit) is a custom-manufactured flexible PCB with photolithographically etched copper traces on a polyimide substrate, supporting complex routing, multilayer construction, fine pitches down to 0.1 mm, and direct SMD component mounting. Use FFC when you need a straight-line connection between two ZIF connectors at a standard pitch, cost is a priority, and quantities are moderate to high. Use FPC when the routing must change direction, pitch is below 0.5 mm, operating temperature exceeds +85°C, impedance must be controlled, or you need to mount components on the flex.
2. Why does conductor material (RA-Cu vs ED-Cu) matter, and how do I specify it?
Rolled annealed copper (RA-Cu) has a flat, layered grain structure that resists fatigue crack propagation under repeated bending, enabling 100,000 to 1,000,000+ flex cycles in dynamic applications such as printer carriages, robot joints, and hinge-mounted displays. Electrodeposited copper (ED-Cu) has a columnar grain structure that cracks under repeated bending — it is suitable only for static routing with fewer than 1,000 lifetime flex cycles. Specifying ED-Cu in a dynamic application is the most common cause of FPC/FFC premature failure in the field. When placing your order, state the expected flex cycles per day and the design service life; LCSC will specify the correct conductor type and verify that the minimum bend radius in your assembly is maintained.
3. What pitch FFC or FPC do I need, and can I use the same connector for both?
The pitch of your cable must exactly match the pitch of your FFC/FPC connector. FFC and FPC cables are dimensionally compatible with the same ZIF connectors when both are made to the same pitch and tab specification — a 0.5 mm FPC and a 0.5 mm FFC will both mate with the same 0.5 mm ZIF housing. Where confusion arises is in the contact side orientation: Type A (same-side contacts at both ends) and Type B (opposite-side contacts) FFCs are not interchangeable. Confirm the contact orientation from the connector datasheet before ordering.
4. When is impedance control required on an FPC, and what values are standard?
Impedance control is required on any FPC carrying high-speed differential signals where the signal rise time is shorter than twice the propagation delay of the flex trace. In practice, this means USB 2.0 and above (90 Ω ± 15% differential), HDMI and DisplayPort (100 Ω ± 10% differential), MIPI CSI-2 and DSI for cameras and displays (100 Ω ± 10%), and RF antenna connections (50 Ω ± 10% single-ended). For low-speed I2C, SPI, GPIO, and analogue sensor signals below 10 MHz, impedance control is not required and adds unnecessary cost.
5. Can FFC/FPC cables be used in automotive or high-temperature environments?
Standard consumer PET-substrate FFC is rated to +85°C. For automotive applications (105°C to 125°C), we offer high-temperature modified PET/PEN substrates for FFCs, or Polyimide (PI) FPCs for extreme engine-bay environments up to +150°C. Polyimide-substrate FPC rated to +125°C continuous is the correct specification for automotive applications and must additionally be qualified to stringent automotive environmental stress tests — including thermal cycling (-40°C to +125°C, 1,000 cycles), vibration per IEC 60068-2-6, and humidity/moisture exposure.