JP011821UNL 1×1 RJ45 PulseJack with 1CT:1CT 100Base-TX Magnetics

JP011821UNL PulseJack Tab-UP RJ45 with integrated 1:1 magnetics, 100Base-TX, 2250 VDC isolation, LEDs; through-hole mounting.

JP011821UNL RJ45 PulseJack Quick Snapshot

• Part number: JP011821UNL (EOL noted in source listing)
• Form factor: 1×1 side-entry (tab-UP) RJ45 with integrated magnetics (1CT:1CT)
• Primary use: 100Base-TX (Fast Ethernet) NICs, embedded devices, routers/switches needing integrated transformer and status LEDs.
• Isolation rating: 2250 VDC (datasheet) — Hipot 1500 Vrms @60 Hz for 1 min.
• Mounting: Through-Hole (THT) — strong mechanical retention, wave-solder compatible.
• Temp range: 0°C to +70°C (operating).
• RoHS: Yes.
• Status: EOL (source label: EOL - CONN,RJ45,1X1,100D,1:1,TU NPB).

Key Features of 1x1 Tab-UP RJ45 PulseJack

• Integrated true 1CT:1CT magnetics — simplifies BOM and reduces board area compared with discrete magnetics.
• High isolation (2250 VDC spec) for robust line isolation and safety margin.
• Bi-color / dual LEDs (left/right) for link/activity diagnostics (G_O/Y notation indicates green/orange bi-color + yellow).
• EMI fingers provided for better shield grounding when chassis/grounded shield used.
• Designed for 100Base-TX — insertion loss, return loss, and crosstalk optimized around 1–100 MHz.
• Through-hole mounting & UL94V-0 housing for reliability and manufacturability.

Specifications of JP011821UNL 100Base-TX Magjack

JP011821UNL Datasheet

1. JP011821UNL Datasheet Mechanicals

2. JP011821UNL Datasheet PCB Layout

3. JP011821UNL Datasheet Electrical Schematics

Materials, Compliance and Environmental Specifications

• Shield: Brass with 10–20 µin nickel plating over brass — good conductivity and corrosion protection.
• Contacts: Phosphor bronze with nickel underplate + selective gold (15 µin) on mating area — ensures low contact resistance and durable mating.
• Housing: Thermoplastic rated UL94V-0 for flammability performance.
• Operating temp: 0°C to 70°C — suitable for commercial-grade equipment but not for harsh industrial (-40°C) environments.
• MSL = 1: no special bake required prior to reflow/assembly.

Design & PCB Integration Notes for RJ45 with Magnetics

• Footprint & mechanical: THT pins provide strong mechanical fixation — confirm board cutouts and keep-out for top-entry clearance.
• Shield grounding: Use EMI finger pads and multiple ground vias to PCB ground to fully exploit shield for EMI control. Route a low-impedance path to chassis if needed.
• Magnetics: Internal 1CT:1CT magnetics remove need for external transformers — still verify PHY side matching and common-mode choke requirements for your PHY.
• LEDs: L/R LED pins use bi-color / single color options (G_O/Y). Check pinout for resistor placement or on-board LED drive requirements — some designs include series resistors on board, others expect them external.
• Thermal / wave solder: THT construction tolerates wave solder and standard reflow flows (check manufacturer recommendations).

FAQs About JP011821UNL 100Base-TX RJ45 MagJack

Q1 — Is JP011821UNL shielded?

A: Yes. The product uses a brass shield with nickel plating (10–20 µin Ni over brass) and includes EMI fingers for chassis grounding.

Q2 — Does JP011821UNL include magnetics?

A: Yes. It contains integrated 1CT:1CT magnetics (TX and RX 1CT:1), removing the need for an external LAN transformer for standard 10/100Base-TX designs.

Q3 — What Ethernet speeds does it support?

A: Engineered for 100Base-TX (10/100 Mbps). It’s not specified for Gigabit operation — validate before using at 1000Base-T.

Q4 — What is the isolation / hipot rating?

A: Isolation is specified as 2250 VDC; hipot test listed is 1500 Vrms @60Hz for 1 minute.

Q5 — What LEDs are available and how are they configured?

A: Left/Right LEDs indicated as G_O / Y (green/orange bi-color on one side, yellow on the other). Verify pinout and series resistor placement in your schematic.

Q6 — What is the operating temperature range?

A: 0°C to +70°C (commercial grade).

Q7 — Is this part RoHS compliant and what is the MSL?

A: Yes, RoHS compliant. MSL = 1.

Q8 — Is JP011821UNL still in production?

A: The source notes EOL (end-of-life) on the part listing. If you rely on long production runs, qualify an alternative LPJ2011KONL early.

Q9 — What are the Typical use cases of JP011821UNL Magjack?

A: Embedded boards, NICs, routers, consumer networking gear requiring integrated magnetics and LED indicators.