This 100Mbit Ethernet cable is designed for direct point-to-point Ethernet connections between two embedded systems using JST GH 4-pin connectors (1.25 mm pitch). It implements a straight-through pinout, making it ideal for internal system links in drones, robotics, or compact networked devices with onboard Ethernet PHYs.

Technical Overview

• Ethernet Standard: 100BASE-TX (IEEE 802.3u)
• Data Rate: 100 Mbit/s
• Length: 50mm - 1000mm
• Connectors: JST GH 4-pin to JST GH 4-pin (same orientation, straight-through)
• Cable Type: Unshielded, 4-wire; twisted TX and RX differential pairs
• PoE: Not supported
• Impedance Matching: Not controlled — suitable for short distances (<30 cm) in low-noise environments

Pin Mapping and Wire Colors

• RX (R+ and R−) and TX (T+ and T−) pairs are individually twisted to reduce intra-pair skew and noise coupling
• No crossover: wiring is 1:1, designed for Ethernet PHYs with mirrored I/O routing

Applications

• Direct Ethernet communication between two embedded boards
• Internal Ethernet wiring in drones, UAV subsystems, or robotic platforms
• PHY-to-PHY prototyping or debugging harness
• Compact system interconnects in custom devices

Build Characteristics

• Lightweight and flexible cable jacket for constrained routing paths
• JST GH series compliant crimping
• Individually twisted signal pairs for RX and TX
• Continuity-tested and suited for lab use or small-scale production