統合型RJ45コネクタの主要仕様の理解

統合型RJ45コネクタ—also known as magnetics RJ45 jacks or RJ45 with built-in transformers—are essential components in Ethernet communication systems. These connectors combine standard RJ45 interface functionality with integrated magnetics, simplifying PCB design while improving signal integrity and EMI performance.

This guide introduces the key performance parameters of integrated RJ45 connectors, categorized into five main sections: 複数のサービス：, mechanical, environmental, 適合性, および other features. Understanding these parameters will help engineers and purchasing teams make smarter component decisions.

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🔌 I. Electrical Performance Parameters

1. 磁気部品
   Integrated RJ45 connectors support various Ethernet speeds, including:

   • 10/100Mbps (Fast Ethernet)

   • 1000Mbps (Gigabit Ethernet)

   • 2.5G, 5G, and 10G Ethernet (for high-speed applications)

2. 挿入損失
   Indicates how much signal is lost as it passes through the connector.

   • Typical: ≤ 1 dB (varies by frequency and speed)

3. リターンロス
   Measures how much signal is reflected due to impedance mismatch.

   • Common requirement: ≥ 16 dB @ 100MHz

4. クロストーク
   Crosstalk refers to signal interference between adjacent pairs.

   • Good integrated RJ45 connectors meet IEEE 802.3 standards for crosstalk isolation.

   • 種類：

     • NEXT（近端クロストーク）

     • FEXT（遠端クロストーク）

5. Hi-Pot Test Voltage (Isolation Voltage)
   Ensures safe electrical isolation between signal and power circuits.

   • Standard value: 1500Vrms for 60 seconds

   • Critical for PoE safety

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⚙️ II. Mechanical Specifications

1. 取付方式

   • THT (Through-Hole Technology)

   • SMT （表面実装技術）

   • Vertical or Right-Angle orientation options

2. ピン構成

   • Standard or custom pin layouts (Tab-Up / Tab-Down)

   • T568A/B compatible for network standards

3. LEDインジケータ

   • Built-in LEDs (green/yellow or bi-color) for link and activity indication

4. Mechanical Dimensions

• Specifies the outer and PCB-related sizes, includes:

  • Body size

  • Pin length

  • Port count: Single (1×1), Dual (1×2), Quad (2×2)

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🌡️ III. Environmental Specifications

1. 動作温度範囲

• Commercial grade: 0°C to +70°C

• Industrial grade: -40°C to +85°C

2. Storage Temperature

• Typically: -40°C to +85°C

3. Humidity Resistance

• Required for high-reliability or outdoor use

• Common benchmark: 95% RH non-condensing

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📑 IV. Compliance & Compatibility

1. Industry Standards

• IEEE 802.3 series (10/100/1000Base-T, 2.5G, 10GBase-T)

• IEEE 802.3af / 802.3at / 802.3bt (PoE compatibility)

2. Environmental Directives

• RoHS and REACH compliance (lead-free, eco-friendly)

3. Safety Certifications

• UL / CE / FCC approvals (as applicable)

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🧩 V. Additional Features

1. Shielding Type

• Shielded (metal housing)

• Unshielded versions available

• Optional EMI fingers for enhanced grounding

2. Integrated Magnetics

• Built-in magnetic components:

  • Common-mode chokes

  • Differential-mode chokes

  • Isolation transformers

• Ensures signal integrity and suppresses EMI

3. Integrated Protection

• Optional built-in TVS (Transient Voltage Suppression)

• Provides electrostatic and surge protection

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📊 Quick Reference Specification Table: LINK-PP LPJ26204ADNL

この LINK-PP LPJ26204ADNL is a dual-port integrated RJ45 connector designed for 10/100 Base-T Ethernet applications.

LINK-PP LPJE101NNL	説明
RJ45 8P8C モジュラージャック（イーサネット）	LPJ26204ADNL
磁気部品	10/100 Mbps
ポート数	Dual (1×2)
取付方式	サークルホール（THT：Through-Hole）
Tab Orientation	Tab Down
LEDインジケータ	Yellow/Green
シールド	シールド付き
Compliance Standards	IEEE 802.3, UL, RoHS, REACH, ISO9001, ISO14001
動作温度範囲	0°C～+70°C
アプリケーション	Patient care devices, handheld devices, operation generators

📄 Download LPJ26204ADNL Datasheet (PDF)

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✅ Conclusion

Understanding the core specifications of Magnetic RJ45 connectors is crucial when designing or sourcing networking hardware. Whether your focus is on signal quality, PoE capability, EMI shielding, or environmental durability, these parameters help ensure you choose the right component for your application.

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