LPJ19911ADNL SMT RJ45 Connector with 10/100BASE-T Magnetics
LPJ19911ADNL SMT RJ45 with integrated 10/100BASE-T magnetics, EMI spring finger, LED option, reflow compatible, -40–+85°C. Datasheet & cross-refs.
LPJ19911ADNL SMT Magjack Key Features
The LPJ19911ADNL is a low-profile, single-port SMT RJ45 connector with built-in 10/100BASE-T magnetics and LED indicators. It integrates common-mode choke and transformer windings (turn ratio 1CT:1CT) meeting typical Fast Ethernet isolation and coupling requirements, while the EMI spring finger shield tabs provide chassis grounding options to reduce radiated emissions. The connector is optimized for SMT reflow assembly with recommended IR reflow profile and is rated for operation from -40 °C to +85 °C, making it suitable for industrial, telecom and embedded networking applications where robust thermal performance and automated production are needed.
- Integrated magnetics for simplified PCB design and reduced BOM (1CT:1CT turn ratio).
- SMT / reflow compatible — designed for modern surface-mount assembly lines.
- 10/100BASE-T data rate; ideal for Fast Ethernet applications.
- EMI spring finger / shield tabs and LED option for EMI control and link/activity indication.
- Wide operating temperature: -40 °C to +85 °C for industrial deployments.
- Compact footprint (L × W × H front/back): 21.60 ±0.5 mm × 15.6 mm × 11.35 mm (front) / 8.9 mm (back).
- Non-PoE (no PoE on this variant) — useful for cost-sensitive or constrained power designs.
- Compatible cross-references: Würth 7498011122AR / 7498011122.
Technical Specifications — LPJ19911ADNL SMT RJ45 Connector
1. General / Mechanical Specifications
| Parameter | Specification |
|---|---|
| Part Number | LPJ19911ADNL |
| Connector Type | SMT RJ45 Connector with Integrated Magnetics |
| Number of Ports | 1 × 1 |
| Latch Orientation | Up (Tab Up) |
| Mounting Type | Surface Mount (SMT) |
| Solder Type | Reflow |
| Data Rate | 10/100BASE-T |
| PoE Support | Non-PoE |
| LED Option | Yes (Link / Activity) |
| EMI Shielding | EMI Spring Finger / EMI Tabs |
| Operating Temperature | -40 °C to +85 °C |
| Compliance | RoHS Compliant |
2. Mechanical Dimensions
| Dimension | Size |
|---|---|
| Length | 21.60 ± 0.5 mm |
| Width | 15.6 mm |
| Height (Front) | 11.35 mm |
| Height (Back) | 8.9 mm |
3. Magnetic / Electrical Specifications (@ 25 °C)
| Parameter | Specification |
|---|---|
| Turn Ratio | 1CT : 1CT ±5% |
| Open Circuit Inductance (OCL) | ≥ 350 µH @ 100 kHz, 0.1 V, 8 mA DC Bias |
| Insertion Loss | ≤ 1.2 dB (1–100 MHz) |
| Return Loss* | See datasheet (frequency-dependent) |
| Crosstalk | ≤ -30 dB (1–100 MHz) |
| Common Mode Rejection (CMR) | ≤ -30 dB (1–100 MHz) |
| Isolation (PHY to Line) | 1500 Vrms |
| Operating Temperature (Electrical) | -40 °C to +85 °C |
* Return loss values are frequency-dependent; please refer to the official datasheet for the complete return loss table.
4. IR Reflow Soldering Profile (SMT)
| Item | Specification |
|---|---|
| Preheat Temperature | 150 – 200 °C |
| Preheat Time | 60 – 180 s |
| Holding / Soak Temperature | 217 °C |
| Time Above 217 °C | 60 – 150 s |
| Peak Temperature | 250 °C (+0 / −5 °C) |
| Time at Peak | Max. 5 s |
| Heating Rate | ≤ 3 °C/s |
| Cooling Rate | ≤ 6 °C/s |
| Total Reflow Time | ≤ 6 minutes |
6. Cross Reference / Compatible Parts
| Manufacturer | Compatible Part Number |
|---|---|
| Würth Elektronik | 7498011122AR |
| Würth Elektronik | 7498011122 |
LPJ19911ADNL RJ45 Connector Drawing
LPJ19911ADNL Mechanical Drawing
LPJ19911ADNL Schematic Drawing
LPJ19911ADNL Recommended PCB Layout
FAQ About LPJ19911ADNL 10/100BASE-T SMT RJ45
LPJ19911ADNL is a single-port SMT RJ45 connector with integrated 10/100BASE-T magnetics, LED status, EMI spring fingers (shield tabs), and an SMT reflow-compatible footprint. Engineered for space-saving LAN interfaces on consumer, industrial and embedded PCBs, the part is designed for reliable signal integrity, wide temperature operation (-40 °C to +85 °C) and automated SMT assembly.
Q: What data rates does this connector support?
A: 10/100BASE-T (Fast Ethernet). This variant is not rated for PoE.
Q: Is this part reflow compatible?
A: Yes — designed for SMT reflow assembly. Follow the provided IR reflow profile and validate with your assembler.
Q: What temperature range can it operate in?
A: -40 °C to +85 °C (per provided specifications).
Q: Are there mechanical drawings and a footprint available?
A: Yes — include a link to the official datasheet/pdf on the product page and provide downloadable STEP/2D CAD files if available.
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.