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)
- 8.83 mm
- Overall Dimensions (L x W x H)
- 22.50 mm x 15.30 mm x 11.35 mm (Excluding solder wings/posts)
- Above-Board Profile Height
- 2.52 mm (11.35 mm total height - 8.83 mm sinking depth)
- Contact Pitch
- 1.27 mm (8.89 mm total span across 8 pins)
- Coplanarity
- 0.10 mm Max.
- Visual Indicators / EMI Tabs
- Without LED / Without EMI Tabs (Smooth Shell)
- Mating Durability
- 750 Mating Cycles
- Recommended PCB Cutout Width
- 15.90 mm
- Standard Compliance
- RoHS Compliant, UL 94V-0
Material Composition
| Material | Value / Description |
|---|---|
| Housing Material | Liquid Crystal Polymer (LCP), UL 94V-0 (Black & Yellow) |
| Cover Material | Liquid Crystal Polymer (LCP), UL 94V-0 (Black & Yellow) |
| Contact Terminal | Phosphor Bronze, Gold Flash (G/F) Plating |
| Solder Terminal | Brass, Matte-Tin Plating |
| Shell Material & Plating | Brass, Nickel Plated |
Technical Characteristics
| Characteristic | Value |
|---|---|
| Current Rating | 1.5 A |
| Voltage Rating | 125 VAC RMS |
| Contact Resistance | 40 mΩ Max. |
| Insulation Resistance | 500 MΩ Min. |
| Dielectric Strength | 1000V AC RMS 50Hz/60Hz, 1 Minute |
| Operating Temperature Range | -40°C to +80°C |
| General Tolerances | 0 Place: ±0.50 mm; 1 Place: ±0.35 mm; 2 Place: ±0.25 mm; 3 Place: ±0.15 mm; Angular: ±2° |
Application Scenarios
-
Ultra-slim Single Board Computers (SBC) and embedded computing blades
-
Low-profile industrial automation controllers and DIN-rail communication modules
-
Compact IoT gateways, routers, and edge networking hardware
-
Thin commercial point-of-sale (POS) hardware and smart display monitors
-
Modular communication sub-boards with strict chassis Z-height constraints
Frequently Asked Questions
What are the mechanical advantages of an 8.83mm sinking mid-mount RJ45 connector?
Recessing 8.83mm into a routed PCB edge slot drops almost the entire 11.35mm connector body into the board plane, leaving only ~2.52mm of height protruding above the PCB. This enables ultra-thin device enclosures while SMT wings and locating posts maintain mechanical stability.
What is the recommended PCB cutout and footprint for this sinking SMT jack?
The PCB requires an edge notch 15.90mm wide. The footprint features 8 SMT solder pads (1.27mm pitch, 0.70mm width), paired with two Ø1.35mm alignment holes and two Ø1.00mm locating holes spaced 17.40mm apart holding a ±0.05mm positional tolerance.
How do the shell and contact materials deliver high durability and heat resistance?
The housing and cover are molded from high-temp LCP rated UL 94V-0, supporting reflow soldering. Gold flash phosphor bronze contacts provide 750 mating cycles and contact resistance under 40 mΩ, while the nickel-plated brass shell ensures full EMI shielding.
What are the operating temperature and electrical insulation ratings for this modular jack?
The connector operates between -40°C and +80°C. It delivers a minimum insulation resistance of 500 MΩ and dielectric breakdown strength of 1000V AC RMS at 50/60Hz for 1 minute, meeting standard physical-layer Ethernet isolation requirements.
Overview and Application Notes
This mid-mount (sinking) RJ45 8P8C female modular jack features a deep 8.83mm drop-in sinking profile with surface-mount (SMT) straight terminals and dual locating posts. Designed without integrated LEDs or EMI tabs (neutral smooth shield), it dramatically reduces above-board profile height to an ultra-compact 2.52mm clearance, providing high-durability Ethernet connectivity for ultra-thin embedded computing, slim networking cards, and space-constrained IoT gateways.
Key Features
- Interface Configuration: Standard 8 positions and 8 contacts (8P8C) female modular jack.
- Deep Mid-Mount Sinking Profile: 8.83mm drop-in sinking height minimizes above-board vertical clearance to just 2.52mm.
- Clean Panel Interface: Without LED indicators and without outer spring EMI tabs for flush chassis integration.
- High-Temperature Material System: Flame-retardant LCP housing and cover (UL 94V-0), phosphor bronze contacts with gold flash (G/F) plating, matte-tin brass solder terminals, and nickel-plated brass shell.
- Electrical & Mechanical Reliability: Rated at 125 VAC RMS / 1.5A, contact resistance ≤ 40 mΩ, insulation resistance ≥ 500 MΩ, dielectric withstanding voltage of 1000V AC RMS, and rated durability of 750 mating cycles.
- Industrial Thermal Range: Tested and validated for stable continuous operation across -40°C to +80°C.
Engineering Specifications & PCB Integration
Engineered for panel-edge cutouts requiring a 15.90mm wide board-edge routing slot. The SMT footprint utilizes 8 signal pads on a 1.27mm pitch (8.89mm total span) with 0.70mm pad widths, paired with dual Ø1.35mm locating posts and dual Ø1.00mm PCB retention holes spaced at 17.40mm. Dual 1.60mm side solder wings provide solid coplanarity control within 0.10mm and mechanical anchoring against repeated insertion stress.
