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)
- Sinking Height (H)
- 4.60 mm
- Overall Dimensions (L x W x H)
- 16.00 mm x 15.80 mm x 10.70 mm (Excluding solder tabs)
- Contact Pitch
- 1.016 mm (7.11 mm total span across 8 pins)
- Terminal Coplanarity
- 0.10 mm Max.
- PCB Locating Pegs
- 2x Ø1.00 mm Plastic Alignment Posts
- Recommended PCB Thickness
- 1.20 mm (±0.05 mm)
- Solder Tab Dimensions
- Dual side grounding pads (2.40 mm x 4.95 mm)
- Standard Compliance
- RoHS Compliant, UL 94V-0
Material Composition
| Material | Value / Description |
|---|---|
| Housing Material | Liquid Crystal Polymer (LCP E130i GF), UL 94V-0, Black |
| Contact Material | Phosphor Bronze (C5191R-H) |
| Contact Plating | 30µ" Min. Nickel Underplating; Gold Flash on Contact Area; 50µ" Min. Matte-Tin on Solder Tails |
| Shell Material | Brass (C2680R-H, T=0.15 mm) |
| Shell Plating | 30µ" ~ 100µ" Nickel Underplating Overall |
Technical Characteristics
| Characteristic | Value |
|---|---|
| Rated Current | 1.5 A |
| Rated Voltage | 125 VAC RMS |
| Contact Resistance | 30 mΩ Max. |
| Insulation Resistance | 500 MΩ Min. |
| Dielectric Withstanding Voltage | 1000V AC RMS 50Hz/60Hz, 1 Minute |
| Operating 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
-
Low-profile industrial Single Board Computers (SBC) and embedded computing boards
-
Ultra-slim IoT routers, edge-computing gateways, and compact switches
-
Commercial interactive displays, digital signage players, and smart kiosks
-
Networked video surveillance modules and low-profile IP camera controllers
-
Industrial automation communication daughtercards with tight vertical enclosures
Frequently Asked Questions
What are the mechanical advantages of a 4.60mm mid-mount sinking RJ45 connector?
A mid-mount sinking RJ45 recesses 4.60mm into a routed PCB cutout rather than sitting directly on top of the PCB surface. This lowers the above-board vertical profile to accommodate slim enclosure designs while utilizing two Ø1.00mm locating posts and large side SMT solder pads to withstand repeated mating insertion forces.
What is the recommended PCB cutout and footprint for this sinking SMT jack?
The PCB requires an edge notch profile widening from 13.60mm to 15.80mm with R0.50 fillets on a 1.20mm nominal thickness FR-4 board. The footprint incorporates 8 SMT signal pads (1.016mm pitch, 0.70mm width), two Ø1.00mm locating holes, and dual 2.40mm x 4.95mm side retention solder pads maintaining ±0.05mm positioning tolerances.
What materials and plating processes are used to prevent corrosion and ensure solderability?
The shell is constructed from C2680R-H brass plated with 30–100µ" nickel for EMI shielding and corrosion resistance. The C5191R-H phosphor bronze contacts feature 30µ" min. nickel underplating, gold flash over the contact interface for stable conductivity, and 50µ" min. matte-tin plating on solder tails to prevent tin whiskers during reflow soldering.
How does the LCP housing handle automated reflow soldering processes?
The connector housing is molded from glass-filled Liquid Crystal Polymer (LCP E130i GF) rated UL 94V-0. This high-temperature thermoplastic maintains terminal coplanarity within 0.10mm and dimensional stability during standard lead-free convection reflow soldering profiles.
Overview and Application Notes
This mid-mount sinking RJ45 8P8C female modular jack features a 4.60mm drop-in profile height with surface-mount (SMT) signal contacts and dual locating posts. Engineered for low-profile industrial and networking equipment, it recesses into the PCB cutout to lower above-board elevation while ensuring continuous EMI shielding and robust surface-mount soldering stability.
Key Features
- Modular Port Configuration: Standard 8 positions and 8 contacts (8P8C) female modular interface.
- Mid-Mount Sinking Geometry: 4.60mm sinking profile lowers vertical above-board clearance to save vertical enclosure space.
- SMT Signal Interface: Surface-mount straight pin array with tight coplanarity specification (0.10mm Max.) for automated reflow assembly.
- High-Temperature Material System: Flame-retardant LCP housing (UL 94V-0 black), phosphor bronze contacts with selective gold flash plating over nickel, matte-tin solder tails, and a nickel-plated brass shield.
- Mechanical Retention: Features dual bottom locating pegs and side ground tabs for vibration resistance and accurate PCB positioning.
- Industrial Compliance: Fully compliant with RoHS directives and lead-free reflow soldering profiles.
Engineering Specifications & PCB Integration
Engineered for panel-edge routing cutouts with a 13.60mm to 14.60mm stepped cutout and 0.50mm radius corner fillets. The SMT footprint utilizes 8 signal pads on a 1.016mm pitch (7.11mm total span) with 0.70mm pad widths, complemented by dual Ø1.00mm locating post holes and dual 2.40mm x 4.95mm side solder tab pads on 1.20mm nominal thickness FR-4 PCBs (±0.05mm tolerance).
