2026年8月14日
What Is an RJ45 Connector? Understanding RJ45 Pinout and Uses
What is RJ45 connector? Get pinout details, Ethernet uses, and sourcing specs like plating and termination to avoid...
Detailed Product Information
Technical Data & Reference
Structured parameters, material notes, application context and frequently asked questions for engineering and procurement evaluation.
Competitor & Cross-Reference
- Alternative Type
- Drop-in Replacement
- Competitor Part Number
- Amphenol RJCSE-5380-01 / Molex 85505 Series Alternative
- Mates With
- Standard RJ45 / 8P8C Male Ethernet Plugs (Cat5e / Cat6)
Drop-in Replacement: This part is a direct, pin-compatible substitute for the competitor part number listed above. No design modification required.
Technical Specifications
- Connector Type
- RJ45 8P8C Female Modular Jack
- Number of Positions / Contacts
- 8 Positions / 8 Contacts (8P8C)
- Mounting Type
- Mid-Mount (Sinking) / Surface Mount (SMT) Right Angle
- Sinking Profile Height (H)
- 8.60 mm
- Shielding Style
- Half-Wrap Shielded (Semi-Shielded)
- Overall Dimensions (L x W x H)
- 18.00 mm x 17.24 mm x 11.60 mm (Envelope dimensions)
- Signal Pin Pitch
- 1.02 mm (1.02 mm x 7 = 7.14 mm total span)
- Signal Pad Width
- 0.70 mm (0.48 mm ±0.05 mm pin width)
- Alignment & Ground Holes
- 2x Ø1.00 mm alignment posts, 2x Ø2.00 mm ground holes
- Recommended PCB Cutout Width
- 13.60 mm (17.24 mm total outer clearance)
- Mating Durability
- 750 Cycles Min.
- Insertion / Withdrawal Force
- 22 N Max. (Without latch)
- Standard Compliance
- RoHS Compliant, UL 94V-0
Material Composition
| Material | Value / Description |
|---|---|
| Housing Material | High Temperature Thermoplastic (UL 94V-0), Black |
| Contact Terminal | Phosphor Copper (Phosphor Bronze), Gold/Tin (Au/Tin) Plated |
| Shell Material & Plating | Copper Alloy, Nickel (Ni) Plated |
Technical Characteristics
| Characteristic | Value |
|---|---|
| Rated Voltage | 125 VAC RMS |
| Rated Current | 1.5 A |
| Contact Resistance | 30 mΩ Max. |
| Insulation Resistance | 500 MΩ Min. (at 500V DC) |
| Operating Temperature Range | 0°C to +70°C |
| Storage Temperature Range | -40°C to +85°C |
| General Dimensional Tolerances | 0 Place: ±0.50 mm; 1 Place: ±0.35 mm; 2 Place: ±0.25 mm; 3 Place: ±0.15 mm; Angular: ±3° |
Application Scenarios
-
Ultra-slim Single Board Computers (SBC) and embedded computing motherboards
-
Compact industrial IoT gateways, edge routers, and switches
-
Commercial smart POS terminals, interactive digital displays, and flat kiosks
-
Low-profile network expansion daughtercards and communication blades
-
Automation control hardware with strict Z-axis height limitations
Frequently Asked Questions
What are the mechanical advantages of an 8.60mm sinking mid-mount RJ45 connector?
Recessing 8.60mm into a pre-routed PCB edge cutout drops the majority of the 11.60mm connector body into the board plane, leaving only ~3.00mm above the PCB surface. This enables ultra-thin enclosure assemblies while dual Ø1.00mm alignment pegs and SMT side wings absorb mating forces.
What is the recommended PCB cutout and footprint for this sinking SMT jack?
The board requires an edge cutout 13.60mm wide opening up to 17.24mm for clearance. The footprint features 8 SMT signal pads (1.02mm pitch, 0.70mm width), supported by two Ø1.00mm alignment holes, two Ø2.00mm ground positioning slots, and side SMT pads holding a ±0.05mm positioning tolerance.
What is the structural purpose of the half-wrap copper alloy shielding shell?
The half-wrap copper alloy shell with nickel plating provides targeted EMI shielding and grounding across top and critical boundary paths while reducing metallic footprint and improving solder joint inspection during automated SMT reflow processes.
What electrical and mechanical endurance ratings does this modular jack fulfill?
The connector is rated for 125 VAC RMS at 1.5A, delivering contact resistance under 30 mΩ and insulation resistance over 500 MΩ at 500V DC. It is mechanically certified for a minimum of 750 mating cycles with maximum insertion and withdrawal forces of 22N.
Overview and Application Notes
This mid-mount sinking RJ45 8P8C female modular jack features an 8.60mm drop-in profile height, surface-mount (SMT) terminal interface, and a half-wrap copper alloy shielding shell. Engineered for ultra-compact networking devices, it dramatically recesses the connector body into the PCB cutout to achieve minimal above-board clearance while providing durable physical retention, 750-cycle mating durability, and stable Ethernet physical-layer transmission.
Key Features
- Modular Configuration: Standard 8 positions and 8 contacts (8P8C) female modular interface.
- Deep Mid-Mount Sinking: 8.60mm drop-in sinking profile significantly reduces above-board vertical stack height.
- Surface-Mount Termination: 8-pin SMT straight contact tails designed for automated Pick & Place reflow assembly.
- Half-Wrap Shielding: Stamped copper alloy shell with nickel plating delivers localized EMI suppression and robust board-level grounding tabs.
- High-Temperature Polymer: Molded from UL 94V-0 black thermoplastic to withstand lead-free reflow thermal profiles.
- Electrical Integrity: Rated at 125 VAC RMS / 1.5A, contact resistance ≤ 30 mΩ, insulation resistance ≥ 500 MΩ, and dielectric strength of 1000V AC RMS.
- Reliable Mechanical Endurance: Rated for a minimum of 750 mating cycles with a 22N maximum insertion/withdrawal force.
Engineering Specifications & PCB Integration
Engineered for panel-edge routing cutouts requiring a 13.60mm cutout width, 2.55mm alignment offsets, and 17.24mm overall ground clearance. Signal lines interface through 8 SMT pads (1.02mm pitch, 7.14mm total span, 0.70mm pad width), supported by dual Ø1.00mm PCB alignment posts, dual Ø2.00mm ground positioning holes, and side SMT retention tabs to provide mechanical resistance against mating stress.
