component
7499111121A
Public Made by Adomby adom
Würth Elektronik WE-RJ45LAN 7499111121A: shielded RJ45 jack, tab down, with integrated 10/100/1000BASE-T transformers and yellow/green LEDs, THT. KiCad symbol and footprint, AI-created 3D model.
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7499111121A
Würth Elektronik 7499111121A: RJ45 jack with integrated 1000BASE-T magnetics and LEDs.
Würth Elektronik WE-RJ45LAN 7499111121A is a shielded single-port RJ45 jack (tab down) with the 1:1 transformers, common-mode chokes and line-side termination for 10/100/1000BASE-T built in, plus a yellow and a green LED. It mounts through-hole with two shield pins and two plastic locating posts.
| Field | Value |
|---|---|
| Manufacturer | Würth Elektronik |
| MPN | 7499111121A |
| Package | RJ45 jack 1x1, tab down, THT, shielded (16.0 x 21.25 x 13.5 mm) |
| Pins | 15 |
| Lifecycle | Active (DigiKey status, 2026-10-17) |
| Datasheet / drawing | manufacturer document |
Key specifications
| Parameter | Value | Source |
|---|---|---|
| Standard | IEEE 802.3ab (10/100/1000BASE-T) | datasheet p.1 |
| Transformer turns ratio | 1:1 +-2 % | datasheet p.1 |
| Inductance | 350 uH min at 100 kHz / 100 mV | datasheet p.1 |
| Insertion loss | -1 dB max, 1 to 100 MHz | datasheet p.1 |
| Return loss | -16 / -13.5 / -12 / -10 dB min (1-30 / 30-60 / 60-80 / 80-100 MHz) | datasheet p.1 |
| Crosstalk | -30 dB min, 1 to 100 MHz | datasheet p.1 |
| CMRR | -30 dB min, 1 to 100 MHz | datasheet p.1 |
| Termination | internal: line-side centre taps through 75 ohm to 1 nF / 2 kV (pin 10); PHY-side centre taps tied to pin 9 with 10 nF to pin 10 | datasheet p.2 schematic |
| LEDs | left yellow (pins 11 anode, 12 cathode), right green (13 anode, 14 cathode), viewed into the port; Vf 1.8 to 2.4 V at 20 mA | datasheet p.2-3 |
| Operating temperature | -40 C to +85 C | datasheet p.1 |
| Housing | PA66, black, UL94 V-0 | datasheet p.1 |
| Shield | brass, 50 microinch nickel | datasheet p.1 |
| Contacts | phosphor bronze | datasheet p.1 |
| Body | 16.0 x 21.25 x 13.5 mm, pins 3.5 +-0.5 mm below the PCB | datasheet p.1 |
| Approvals | RoHS, REACh, cURus E472316 (UL 62368) | datasheet p.1 |
Sources are the manufacturer documents listed under Manufacturer and resources; page and sheet references are given per row.
Pins
| Pad | Name | Function |
|---|---|---|
| 1 | D1+ |
Transformer 1, PHY side + (RJ45 contact 1) |
| 2 | D1- |
Transformer 1, PHY side - (RJ45 contact 2) |
| 3 | D2+ |
Transformer 2, PHY side + (RJ45 contact 3) |
| 4 | D3+ |
Transformer 3, PHY side + (RJ45 contact 4) |
| 5 | D3- |
Transformer 3, PHY side - (RJ45 contact 5) |
| 6 | D2- |
Transformer 2, PHY side - (RJ45 contact 6) |
| 7 | D4+ |
Transformer 4, PHY side + (RJ45 contact 7) |
| 8 | D4- |
Transformer 4, PHY side - (RJ45 contact 8) |
| 9 | VCC |
Common PHY-side centre tap (datasheet label VCC), 10 nF internally to pin 10 |
| 10 | GND |
Termination ground (datasheet label GND) |
| 11 | LEDY_A |
Yellow LED anode (left, viewed into the port) |
| 12 | LEDY_K |
Yellow LED cathode |
| 13 | LEDG_A |
Green LED anode (right, viewed into the port) |
| 14 | LEDG_K |
Green LED cathode |
| SH | SHIELD |
Shield (2 pins) |
Design notes
- Pins 1 to 8 are the PHY side of the four transformer channels: D1+/D1- (pins 1/2, RJ45 contacts 1/2), D2+/D2- (pins 3/6, contacts 3/6), D3+/D3- (pins 4/5, contacts 4/5), D4+/D4- (pins 7/8, contacts 7/8). Pin 9 (VCC in the datasheet) is the common PHY-side centre tap, pin 10 (GND) the termination ground.
- The datasheet labels pin 9 VCC. For a voltage-mode PHY it is commonly decoupled to ground rather than tied to a supply; check the PHY vendor's guidance.
- Wurth gives drill sizes only. The annular rings (1.5 mm on d0.9, 1.6 mm on d1.03, 2.4 mm on d1.6) were chosen for this footprint. The hole-pattern view on page 1 was read as the top view: it is the mirror of the pin-tail (bottom) view on the same page.
Sourcing
| Distributor | Part number | Stock 2026-10-17 | Price / note |
|---|---|---|---|
| Mouser | 710-7499111121A | 652 | 9.14 USD (1), 8.46 USD (100) |
| DigiKey | 1297-1070-5-ND | 1,164 | 8.69 USD (1), 7.24 USD (100) |
| LCSC / JLCPCB | C5523983 | 53 |
Stock and prices are a snapshot from adom-parts-search on 2026-10-17; check the distributor before ordering.
CAD files
| File | What it is |
|---|---|
7499111121a.kicad_sym |
KiCad symbol with MPN, manufacturer, Mouser, DigiKey and LCSC fields |
7499111121a.kicad_mod |
KiCad footprint: 10 signal holes d0.9 (two rows, 1.27 mm stagger), 4 LED holes d1.03, 2 shield holes d1.6, 2 NPTH locating posts d3.25. Origin at the body centre; the port opening faces KiCad +Y (Dwgs.User line marks the panel 2.03 mm behind the front). |
7499111121a.lbr |
Fusion / EAGLE library generated from the KiCad symbol and footprint (adom-lbr) |
7499111121a-etched.step / .glb |
board-use 3D model with the virtual MPN mark (the KiCad footprint references the STEP) |
7499111121a.step |
the same AI-created model without the mark |
7499111121a-hero.glb |
page hero: the model plus footprint pad outlines, silkscreen and pin labels (adom-hero 1.4); not for board use |
tools/7499111121a_model.py |
CadQuery generator of the AI-created model |
3D model
The 3D model is AI-created from the manufacturer drawing, not a manufacturer model. The manufacturer's own model is not redistributed (its download terms grant no redistribution right). Sheet-metal shield box 16.0 x 21.25 x 13.5 mm with the port opening and the latch slot at the bottom (tab down), black housing, translucent yellow and green LED windows at the lower front corners, 14 straight pins and 2 shield tabs to 3.5 mm below the PCB, 2 plastic posts. No panel EMI fingers and no internal contacts.
- Frame: Adom Z-up, millimetres, seating plane z = 0, origin = footprint origin, identity footprint binding. Extents: 16.0 x 21.25 x 13.5 mm above the PCB, pins to -3.5 mm.
- Cross-check against the manufacturer model (not included): Wurth STEP: body 16.0 x 21.25, shield top 13.3 mm (datasheet 13.5 +-0.25 mm; this model uses the datasheet 13.5), LEDs at the lower front corners, yellow on the left: matches.
- Virtual MPN mark (identification aid, not a claim about the real part's marking): On the long side wall (the shield, light metal), dark mark. The planner chose the side because the top is a plain shield plate under the panel and the front carries the port and LEDs; the gate warns on a dark mark by rule and accepts it on a light body. Placed with adom-aiflow-etch; the plan and gate report are in
provenance/etch/.
Manufacturer and resources
- Wurth datasheet 7499111121A rev 003.000 (dimensions, hole pattern, schematic, electrical and LED properties) (rev 003.000, 2023-07-11, status Valid)
- Wurth STEP model (reference only, used to cross-check the envelope and LED positions; not redistributed) (rev1, 2023-02-06, Solid Edge)
Provenance
Every published file is listed in provenance/provenance.json with its sha256, classification, generator, sources and assumptions.
| File | Classification | Source / generator |
|---|---|---|
7499111121a.kicad_sym |
manufacturer-derived | https://www.we-online.com/components/products/datasheet/7499111121A.pdf |
7499111121a.kicad_mod |
manufacturer-derived | https://www.we-online.com/components/products/datasheet/7499111121A.pdf |
7499111121a.step |
AI-created | https://www.we-online.com/components/products/datasheet/7499111121A.pdf |
7499111121a-etched.step |
derived (AI-created model + virtual MPN mark) | 7499111121a.step |
7499111121a-etched.glb |
derived | 7499111121a-etched.step |
7499111121a-hero.glb |
derived (reference artwork, not board use) | 7499111121a-etched.glb + 7499111121a.kicad_mod + page.json pins |
7499111121a-hero.overlay.json |
derived | component-hero scripts/hero_glb.py |
7499111121a.lbr |
derived | 7499111121a.kicad_sym + 7499111121a.kicad_mod |
tools/7499111121a_model.py |
AI-created | Claude (Anthropic) via Claude Code, Adom AI thread; CadQuery 2.8.0 (OCP), adom-aiflow-etch, step2glb, component-hero hero_glb.py (adom-hero 1.4), adom-symbol / adom-footprint embed |
viewers/symbol.html |
derived | adom-symbol embed |
viewers/footprint.html |
derived | adom-footprint embed |
docs/hero.png |
derived | 7499111121a-etched.step |
provenance/etch/7499111121a-etched.mark-plan.json |
derived | adom-aiflow-etch |
provenance/etch/7499111121a-etched.check.json |
derived | adom-aiflow-etch |
provenance/etch/7499111121a-etched.check.png |
derived | adom-aiflow-etch |
Classifications: manufacturer-derived = drawn by Adom from the cited manufacturer drawing (no manufacturer file copied); AI-created = geometry modelled by an AI from the drawing dimensions; derived = produced by a tool from another file on this page.
Licence
Adom-authored files: CC-BY-SA-4.0 (see LICENSE). Manufacturer documents are linked, not redistributed.
# 7499111121A
**Würth Elektronik 7499111121A**: RJ45 jack with integrated 1000BASE-T magnetics and LEDs.
Würth Elektronik WE-RJ45LAN 7499111121A is a shielded single-port RJ45 jack (tab down) with the 1:1 transformers, common-mode chokes and line-side termination for 10/100/1000BASE-T built in, plus a yellow and a green LED. It mounts through-hole with two shield pins and two plastic locating posts.
| Field | Value |
|---|---|
| Manufacturer | Würth Elektronik |
| MPN | `7499111121A` |
| Package | RJ45 jack 1x1, tab down, THT, shielded (16.0 x 21.25 x 13.5 mm) |
| Pins | 15 |
| Lifecycle | Active (DigiKey status, 2026-10-17) |
| Datasheet / drawing | [manufacturer document](https://www.we-online.com/components/products/datasheet/7499111121A.pdf) |
## Key specifications
| Parameter | Value | Source |
|---|---|---|
| Standard | IEEE 802.3ab (10/100/1000BASE-T) | datasheet p.1 |
| Transformer turns ratio | 1:1 +-2 % | datasheet p.1 |
| Inductance | 350 uH min at 100 kHz / 100 mV | datasheet p.1 |
| Insertion loss | -1 dB max, 1 to 100 MHz | datasheet p.1 |
| Return loss | -16 / -13.5 / -12 / -10 dB min (1-30 / 30-60 / 60-80 / 80-100 MHz) | datasheet p.1 |
| Crosstalk | -30 dB min, 1 to 100 MHz | datasheet p.1 |
| CMRR | -30 dB min, 1 to 100 MHz | datasheet p.1 |
| Termination | internal: line-side centre taps through 75 ohm to 1 nF / 2 kV (pin 10); PHY-side centre taps tied to pin 9 with 10 nF to pin 10 | datasheet p.2 schematic |
| LEDs | left yellow (pins 11 anode, 12 cathode), right green (13 anode, 14 cathode), viewed into the port; Vf 1.8 to 2.4 V at 20 mA | datasheet p.2-3 |
| Operating temperature | -40 C to +85 C | datasheet p.1 |
| Housing | PA66, black, UL94 V-0 | datasheet p.1 |
| Shield | brass, 50 microinch nickel | datasheet p.1 |
| Contacts | phosphor bronze | datasheet p.1 |
| Body | 16.0 x 21.25 x 13.5 mm, pins 3.5 +-0.5 mm below the PCB | datasheet p.1 |
| Approvals | RoHS, REACh, cURus E472316 (UL 62368) | datasheet p.1 |
Sources are the manufacturer documents listed under Manufacturer and resources; page and sheet references are given per row.
## Pins
| Pad | Name | Function |
|---|---|---|
| 1 | `D1+` | Transformer 1, PHY side + (RJ45 contact 1) |
| 2 | `D1-` | Transformer 1, PHY side - (RJ45 contact 2) |
| 3 | `D2+` | Transformer 2, PHY side + (RJ45 contact 3) |
| 4 | `D3+` | Transformer 3, PHY side + (RJ45 contact 4) |
| 5 | `D3-` | Transformer 3, PHY side - (RJ45 contact 5) |
| 6 | `D2-` | Transformer 2, PHY side - (RJ45 contact 6) |
| 7 | `D4+` | Transformer 4, PHY side + (RJ45 contact 7) |
| 8 | `D4-` | Transformer 4, PHY side - (RJ45 contact 8) |
| 9 | `VCC` | Common PHY-side centre tap (datasheet label VCC), 10 nF internally to pin 10 |
| 10 | `GND` | Termination ground (datasheet label GND) |
| 11 | `LEDY_A` | Yellow LED anode (left, viewed into the port) |
| 12 | `LEDY_K` | Yellow LED cathode |
| 13 | `LEDG_A` | Green LED anode (right, viewed into the port) |
| 14 | `LEDG_K` | Green LED cathode |
| SH | `SHIELD` | Shield (2 pins) |
## Design notes
- Pins 1 to 8 are the PHY side of the four transformer channels: D1+/D1- (pins 1/2, RJ45 contacts 1/2), D2+/D2- (pins 3/6, contacts 3/6), D3+/D3- (pins 4/5, contacts 4/5), D4+/D4- (pins 7/8, contacts 7/8). Pin 9 (VCC in the datasheet) is the common PHY-side centre tap, pin 10 (GND) the termination ground.
- The datasheet labels pin 9 VCC. For a voltage-mode PHY it is commonly decoupled to ground rather than tied to a supply; check the PHY vendor's guidance.
- Wurth gives drill sizes only. The annular rings (1.5 mm on d0.9, 1.6 mm on d1.03, 2.4 mm on d1.6) were chosen for this footprint. The hole-pattern view on page 1 was read as the top view: it is the mirror of the pin-tail (bottom) view on the same page.
## Sourcing
| Distributor | Part number | Stock 2026-10-17 | Price / note |
|---|---|---|---|
| Mouser | [710-7499111121A](https://www.mouser.com/ProductDetail/Wurth-Elektronik/7499111121A?qs=SaTeGCoDkn0uzGe6Q88rzw%3D%3D) | 652 | 9.14 USD (1), 8.46 USD (100) |
| DigiKey | [1297-1070-5-ND](https://www.digikey.com/en/products/detail/w%C3%BCrth-elektronik/7499111121A/3992675) | 1,164 | 8.69 USD (1), 7.24 USD (100) |
| LCSC / JLCPCB | [C5523983](https://www.lcsc.com/product-detail/C5523983.html) | 53 | |
Stock and prices are a snapshot from adom-parts-search on 2026-10-17; check the distributor before ordering.
## CAD files
| File | What it is |
|---|---|
| `7499111121a.kicad_sym` | KiCad symbol with MPN, manufacturer, Mouser, DigiKey and LCSC fields |
| `7499111121a.kicad_mod` | KiCad footprint: 10 signal holes d0.9 (two rows, 1.27 mm stagger), 4 LED holes d1.03, 2 shield holes d1.6, 2 NPTH locating posts d3.25. Origin at the body centre; the port opening faces KiCad +Y (Dwgs.User line marks the panel 2.03 mm behind the front). |
| `7499111121a.lbr` | Fusion / EAGLE library generated from the KiCad symbol and footprint (adom-lbr) |
| `7499111121a-etched.step` / `.glb` | board-use 3D model with the virtual MPN mark (the KiCad footprint references the STEP) |
| `7499111121a.step` | the same AI-created model without the mark |
| `7499111121a-hero.glb` | page hero: the model plus footprint pad outlines, silkscreen and pin labels (adom-hero 1.4); not for board use |
| `tools/7499111121a_model.py` | CadQuery generator of the AI-created model |
## 3D model
**The 3D model is AI-created from the manufacturer drawing, not a manufacturer model.** The manufacturer's own model is not redistributed (its download terms grant no redistribution right). Sheet-metal shield box 16.0 x 21.25 x 13.5 mm with the port opening and the latch slot at the bottom (tab down), black housing, translucent yellow and green LED windows at the lower front corners, 14 straight pins and 2 shield tabs to 3.5 mm below the PCB, 2 plastic posts. No panel EMI fingers and no internal contacts.
- Frame: Adom Z-up, millimetres, seating plane z = 0, origin = footprint origin, identity footprint binding. Extents: 16.0 x 21.25 x 13.5 mm above the PCB, pins to -3.5 mm.
- Cross-check against the manufacturer model (not included): Wurth STEP: body 16.0 x 21.25, shield top 13.3 mm (datasheet 13.5 +-0.25 mm; this model uses the datasheet 13.5), LEDs at the lower front corners, yellow on the left: matches.
- Virtual MPN mark (identification aid, not a claim about the real part's marking): On the long side wall (the shield, light metal), dark mark. The planner chose the side because the top is a plain shield plate under the panel and the front carries the port and LEDs; the gate warns on a dark mark by rule and accepts it on a light body. Placed with adom-aiflow-etch; the plan and gate report are in `provenance/etch/`.
## Manufacturer and resources
- [Wurth datasheet 7499111121A rev 003.000 (dimensions, hole pattern, schematic, electrical and LED properties)](https://www.we-online.com/components/products/datasheet/7499111121A.pdf) (rev 003.000, 2023-07-11, status Valid)
- [Wurth STEP model (reference only, used to cross-check the envelope and LED positions; not redistributed)](https://www.we-online.com/components/products/download/7499111121A%20(rev1).stp) (rev1, 2023-02-06, Solid Edge)
## Provenance
Every published file is listed in [`provenance/provenance.json`](provenance/provenance.json) with its sha256, classification, generator, sources and assumptions.
| File | Classification | Source / generator |
|---|---|---|
| `7499111121a.kicad_sym` | manufacturer-derived | https://www.we-online.com/components/products/datasheet/7499111121A.pdf |
| `7499111121a.kicad_mod` | manufacturer-derived | https://www.we-online.com/components/products/datasheet/7499111121A.pdf |
| `7499111121a.step` | AI-created | https://www.we-online.com/components/products/datasheet/7499111121A.pdf |
| `7499111121a-etched.step` | derived (AI-created model + virtual MPN mark) | 7499111121a.step |
| `7499111121a-etched.glb` | derived | 7499111121a-etched.step |
| `7499111121a-hero.glb` | derived (reference artwork, not board use) | 7499111121a-etched.glb + 7499111121a.kicad_mod + page.json pins |
| `7499111121a-hero.overlay.json` | derived | component-hero scripts/hero_glb.py |
| `7499111121a.lbr` | derived | 7499111121a.kicad_sym + 7499111121a.kicad_mod |
| `tools/7499111121a_model.py` | AI-created | Claude (Anthropic) via Claude Code, Adom AI thread; CadQuery 2.8.0 (OCP), adom-aiflow-etch, step2glb, component-hero hero_glb.py (adom-hero 1.4), adom-symbol / adom-footprint embed |
| `viewers/symbol.html` | derived | adom-symbol embed |
| `viewers/footprint.html` | derived | adom-footprint embed |
| `docs/hero.png` | derived | 7499111121a-etched.step |
| `provenance/etch/7499111121a-etched.mark-plan.json` | derived | adom-aiflow-etch |
| `provenance/etch/7499111121a-etched.check.json` | derived | adom-aiflow-etch |
| `provenance/etch/7499111121a-etched.check.png` | derived | adom-aiflow-etch |
Classifications: **manufacturer-derived** = drawn by Adom from the cited manufacturer drawing (no manufacturer file copied); **AI-created** = geometry modelled by an AI from the drawing dimensions; **derived** = produced by a tool from another file on this page.
## Licence
Adom-authored files: CC-BY-SA-4.0 (see `LICENSE`). Manufacturer documents are linked, not redistributed.