RJ45 Connector — 8P8C Female Male PCB Mount Panel Socket for Ethernet & Network

RJ45 Connectors — 8P8C Female/Male PCB Mount & Panel Sockets for Ethernet, PoE & Network Applications

The RJ45 connector (formally 8P8C — 8 Position, 8 Contact) is the universal standard for Ethernet network connections, used in virtually every wired network device worldwide: computers, switches, routers, IP cameras, VoIP phones, industrial Ethernet controllers, and IoT gateways. The RJ45 designation covers both the modular plug (male, on cables) and the modular jack (female receptacle, on devices and PCBs). This collection provides the complete RJ45 connector ecosystem for PCB design, panel mounting, cable termination, and network infrastructure — covering shielded and unshielded variants, with and without integrated magnetics, and with LED status indicators.

RJ45 Connector Variant Reference Guide

• Unshielded RJ45 female (PCB mount) — Standard 8P8C modular jack for PCB mounting. Available in SMT, DIP vertical, and DIP right-angle configurations. Used in consumer electronics, IoT devices, and cost-sensitive network equipment.
• Shielded RJ45 female (PCB mount) — Metal-shielded 8P8C modular jack for EMI-sensitive applications. Required for Cat5e, Cat6, and Cat6A shielded cable (STP/FTP) terminations and industrial Ethernet applications.
• RJ45 with integrated magnetics (RJ45+MAG) — Modular jack with built-in isolation transformer and common-mode choke. Eliminates the need for external Ethernet magnetics on the PCB, simplifying design and reducing BOM cost. Available in 10/100BASE-T and Gigabit (1000BASE-T) variants.
• RJ45 with LED indicators — Modular jack with integrated green/yellow LED windows for link and activity status indication. Available with and without integrated magnetics.
• Panel mount RJ45 — Chassis-mounted RJ45 socket with flange or nut for installation in enclosure panels. Available in shielded and unshielded variants, with and without LED indicators.
• RJ45 male plug — 8P8C modular plug for field termination of Cat5e, Cat6, and Cat6A cables. Available in standard (for solid and stranded wire) and pass-through (EZ-RJ45 style) configurations.
• RJ45 keystone jack — 110-punch-down or tool-free keystone module for structured cabling patch panels and wall plates. Cat5e and Cat6 rated.

Key Technical Specifications

• Contact configuration: 8P8C (8 position, 8 contact)
• Contact material: Phosphor bronze, gold-plated (50μ" Au over Ni)
• Frequency rating: Up to 250MHz (Cat6) / 500MHz (Cat6A)
• PoE support: IEEE 802.3af (15.4W), 802.3at (30W), 802.3bt (90W) — dependent on variant
• Rated voltage: 125V AC
• Rated current: 1.5A per contact
• Mating cycles: ≥1,500 (standard) / ≥5,000 (industrial variants)
• Mounting styles: SMT, DIP vertical, DIP right-angle, panel mount
• Certifications: CE, RoHS, TIA-568, ISO/IEC 11801

Complete Product Range in This Collection

This collection includes: unshielded RJ45 female jacks (SMT, DIP vertical, DIP right-angle), shielded RJ45 female jacks (SMT, DIP, right-angle), RJ45 with integrated magnetics (10/100BASE-T and Gigabit, single and dual port), RJ45 with LED indicators (single and dual LED, with and without magnetics), panel mount RJ45 sockets (shielded and unshielded, with LED), RJ45 male plugs (Cat5e and Cat6, standard and pass-through), and RJ45 keystone jacks (Cat5e and Cat6, 110-punch-down).

Ideal Applications

• PCB mount jacks: Ethernet port on embedded Linux boards (Raspberry Pi, BeagleBone), industrial IoT gateways, IP cameras, VoIP phones, network switches, and routers
• RJ45 with magnetics: Simplified Ethernet PHY circuit design eliminating external transformer; single-chip Ethernet solutions for ESP32, STM32, and similar MCUs
• Panel mount: Industrial enclosure Ethernet ports; DIN rail-mounted network equipment; outdoor and harsh-environment network connections
• Male plugs: Field termination of Cat5e/Cat6 patch cables; structured cabling installation; cable repair
• Keystone jacks: Structured cabling patch panels; wall plate outlets; data center cable management

RJ45 Connector Buying Guide

Step 1 — Shielded vs unshielded: Use unshielded (UTP) jacks for standard office and home network installations with unshielded Cat5e/Cat6 cable. Use shielded (STP/FTP) jacks for industrial environments with high EMI, or when using shielded cable. Shielded jacks require proper grounding to be effective.

Step 2 — With or without integrated magnetics: If your PCB design includes an Ethernet PHY IC (e.g., LAN8720, W5500, RTL8211), you need either external Ethernet magnetics or an RJ45 jack with integrated magnetics. RJ45+MAG jacks simplify PCB design and reduce component count. Verify the magnetics specification matches your PHY's requirements (10/100 vs Gigabit).

Step 3 — PoE requirements: For Power over Ethernet applications, verify the jack's current rating supports your PoE standard: 802.3af (350mA), 802.3at (600mA), or 802.3bt (960mA). Standard RJ45 jacks rated 1.5A per contact support all PoE standards.

Step 4 — Mounting style: DIP right-angle jacks are the most common for PCB edge-accessible Ethernet ports. SMT jacks are used in high-density PCB designs. Panel mount jacks are for chassis-mounted ports accessible from outside an enclosure.

Why Choose Yoeruyo for RJ45 Connectors?

Yoeruyo stocks the complete RJ45 connector range — unshielded, shielded, with integrated magnetics, with LED indicators, panel mount, male plugs, and keystone jacks — all with gold-plated phosphor bronze contacts rated for Cat5e and Cat6 performance. CE and RoHS certified, TIA-568 and ISO/IEC 11801 compliant. Available from 5pcs for prototyping to 500pcs+ for production.

Frequently Asked Questions

Q: What is the difference between RJ45 and 8P8C?
A: Technically, RJ45 is a specific wiring standard (used for T1 telephone lines) while 8P8C describes the physical connector (8 positions, 8 contacts). However, in common usage, "RJ45" universally refers to the 8P8C modular connector used for Ethernet. All Ethernet connectors described as RJ45 are physically 8P8C.

Q: What is an RJ45 connector with integrated magnetics?
A: An RJ45 jack with integrated magnetics (also called a MagJack or integrated connector module) includes a built-in isolation transformer and common-mode choke inside the connector housing. This eliminates the need for separate external Ethernet magnetics on the PCB, simplifying design and reducing board area.

Q: Can I use a Cat5e RJ45 jack for Cat6 or Gigabit Ethernet?
A: Cat5e jacks support up to 1000BASE-T (Gigabit Ethernet) at distances up to 100m. Cat6 jacks provide better performance (lower crosstalk, higher bandwidth) and are recommended for new installations. For 10GBASE-T, Cat6A or Cat7 jacks are required.

Q: Do RJ45 connectors support PoE (Power over Ethernet)?
A: Yes. Standard RJ45 jacks rated 1.5A per contact support all PoE standards including 802.3bt (90W). The PoE power is carried on the same conductors as the data signal. No special PoE-specific connector is required.

Q: What is the difference between a keystone jack and a standard PCB mount jack?
A: Keystone jacks are designed for structured cabling infrastructure — they snap into standard keystone wall plates and patch panels and use 110-punch-down or tool-free termination for solid-core Cat5e/Cat6 cable. PCB mount jacks are soldered directly to a PCB. They serve different installation contexts and are not interchangeable.