JK0-0177NL 1000BASE-T PoE+ RJ45 PoE+ RJ45 Connector (Tab-Up, 35W PSE, 2250VDC)

The JK0-0177NL is a high-performance, single-port (1x1) Gigabit (1000BASE-T) RJ45 Integrated Connector Module (ICM) from the proprietary PulseJack™ series. Engineered with an advanced internal architecture featuring 12 discrete signal pins and 4 isolated PoE+ power pins, the JK0-0177NL fully complies with IEEE 802.3at / IEEE 802.3bt specifications.

It provides up to 35W continuous power at the PSE site (15W–30W at the PD site) over 2 or 4 pairs while maintaining a robust 2250 VDC dielectric isolation. Featuring an industry-leading 350 µH minimum open-circuit inductance (OCL) verified under 20 mA line-side DC bias, the JK0-0177NL ensures zero core saturation in high-power PoE setups. Housed in a UL 94 V-0 flame-retardant thermoplastic body with MSL 1 rating, it is optimized for high-density networking hardware, IP security cameras, smart building controllers, and enterprise access points.

1. General & Environmental Performance

2. PoE Power Delivery & Electrical Characteristics (@ 25°C)

100Ω±15Ω100Ω±15Ω)

3. Materials, Mechanical Durability & LED Configuration

IF=20 mAIF​=20 mA

JK0-0177NL RJ45 Connector Datasheet

Engineering Deep-Dive: Why Choose the JK0-0177NL?

1. 20 mA DC Bias Tolerance: Preventing Core Saturation Under High Unbalance Currents

Most generic Gigabit ICMs are only rated for 11 mA DC bias under the legacy IEEE 802.3 standard. In real-world PoE+ installations, cable pair resistance imbalances can induce high DC loop offsets.

The Pulse JK0-0177NL guarantees a minimum 350 µH OCL at 20 mA DC bias, delivering nearly double the saturation margin of conventional connectors. This prevents inductance roll-off, stabilizes high-frequency return loss, and completely eliminates packet dropping or link flapping on long cable runs (up to 100 meters).

OCL STABILITY VS. DC BIAS CURRENT
   Inductance (µH)
    400 ┌──────────────────────────────────────────────┐
        │                                              │
    350 ├──────────────────────────┐                   │ <--- JK0-0177NL (350µH @ 20mA)
        │                          │                   │
    300 ├──────────────────────────┼─────┐             │
        │                          │     │ <───────────┼───── Standard ICMs (Drop <11mA)
    250 └──────────────────────────┴─────┴─────────────┘
        0mA                       11mA  20mA         30mA (DC Bias)

2. Dedicated 12-Signal + 4-PoE Pin Physical Separation

Unlike common integrated connectors that combine center taps on internal signal traces, the JK0-0177NL features an exclusive physical separation of 12 signal pins and 4 heavy-gauge PoE power pins.

• Thermal Decoupling: Isolates up to 35W of continuous DC heating from sensitive PHY differential signals.
• Reduced Near-End Crosstalk (NEXT): Minimizes mutual inductance coupling between power injection transients and data transformers.

Hardware Design & PCB Layout Recommendations

1. High-Current PoE Routing (4 Power Pins):

• Route the 4 dedicated PoE power traces with a width of at least 30 to 35 mils (for 1 oz copper) to accommodate up to 720 mA continuous line currents with minimal temperature rise.
• Place a local thermal transfer polygon under the power return pins to conduct heat directly into internal ground/power planes.

2. 2250 VDC Isolation Keep-Out Boundary:

Maintain an absolute clearance distance of ≥ 2.0 mm between the front-end line-side circuitry (chassis/shield ground) and the digital PHY side circuitry (logic ground) to pass 2250 VDC dielectric testing safely.

3. Wave Soldering Thermal Profile:

Because the module features an MSL 1 thermoplastic housing, it is ready for wave soldering straight out of the packaging. The recommended peak temperature is 260°C maximum for a duration not exceeding 10 seconds.

Sourcing, Logistics & Ordering Information

• Part Number for Ordering: JK0-0177NL
• Packaging Standard: Industrial anti-static Tray packaging (protective cushioned master shipping cartons).
• Moisture Sensitivity: JEDEC MSL 1 (no dry-pack or baking required before wave soldering).
• Minimum Order Quantity (MOQ): Standard full tray quantities (Sample quantities supported for prototyping).
• Standard Factory Lead Time: 6–10 Weeks (Contact our sales desk for dynamic buffer inventory).

Frequently Asked Questions

Q1: What is the operational difference between the Pulse JK0-0177NL and JXK0-0177NL?

A: The primary difference lies in the operating temperature rating. The JK0-0177NL is specified for commercial temperature environments (0°C to +70°C). The JXK0-0177NL is designed with extended-temperature magnetic wire and potting to withstand industrial temperatures (-40°C to +85°C). Both devices share identical pinouts, footprint dimensions, and electrical turns ratios.

Q2: Can the JK0-0177NL support IEEE 802.3bt 4-pair PoE power?

A: Yes. While the JK0-0177NL was initially targeted for IEEE 802.3at (PoE+) 30W delivery over 2 pairs (using line connections MX1 and MX2, or 15W using MX3/MX4), its internal 4-channel transformer geometry and dedicated 4-pin power extraction allow it to support up to 30W–80W power distribution across all 4 pairs under the newer IEEE 802.3bt standard.

Q3: Why is 350 µH @ 20 mA DC bias critical for PoE+ applications?

A: When high DC currents flow through an Ethernet cable, resistance mismatches between conductor pairs generate an unbalanced DC bias across the transformer windings. The JK0-0177NL is guaranteed to maintain at least 350 µH of inductance with a 20 mA DC current bias applied, preventing magnetic saturation that could distort Ethernet differential signals and cause packet loss.

Q4: Which Ethernet PHY transceivers are compatible with the JK0-0177NL?

A: The standard 1CT:1CT turns ratio across all 4 differential channels makes the JK0-0177NL universally compatible with all leading current-mode and voltage-mode Gigabit Ethernet PHYs, including ICs from TI, Marvell, Broadcom, Realtek, and Microchip.