Würth Elektronik 7499111121A Alternative: VOOHU SYT111Q068DB1A1D Comparison

VOOHUSYT111Q068DB1A1Dis a functional alternative to the Würth Elektronik 7499111121A — verify with samples in your design. Both are single-port, right-angle, tab-down 1000BASE-T MagJacks (RJ45 jacks with integrated magnetics). On the two datasheets, the PHY-side pin numbers, the four 75 Ω terminations to a 1000 pF / 2 kV capacitor, the yellow-left / green-right LED layout and the −40 to +85 °C operating range read the same. The layout point to act on is the shield pins: Würth 2 × Ø1.6 mm on 15.49 mm centres; VOOHU 2 × Ø1.63 mm on 15.75 mm centres (0.26 mm wider). An existing Würth footprint needs these two holes re-checked against the VOOHU drawing.

7499111121A vs. SYT111Q068DB1A1D: parameter table

Würth values are taken from the 7499111121A datasheet (rev 003.000); VOOHU values from the SYT111Q068DB1A1D datasheet (REV A0) and, where marked, its product page. Dimensions are in millimetres and copied as printed.

Shield pins, hole sizes and other differences to review

Shield pins.Shield-pin holes: Würth 2 × Ø1.6 mm on 15.49 mm centres; VOOHU 2 × Ø1.63 mm on 15.75 mm centres (0.26 mm wider). An existing Würth footprint needs these two holes re-checked against the VOOHU drawing. Mark this pair first when you overlay the two drawings.

Other hole diameters.The signal and locating-post holes share their centre spacing, the LED hole spacing differs by 0.02 mm or less, and the printed diameters differ slightly: locating posts Ø3.25 mm (Würth) vs Ø3.20 mm (VOOHU), signal pins Ø0.9 mm vs Ø0.89 mm, LED pins Ø1.03 mm vs Ø1.02 mm. The row dimensions 8.89 mm and 3.05 mm appear on both drawings; the remaining row dimensions are taken from different reference lines, so compare them on an overlay rather than number by number.

Isolation test condition.Würth specifies 1500 V (RMS) minimum for 1 minute. The VOOHU datasheet specifies 1500 V AC and 2250 V DC for 6 s at 1 mA, primary to secondary. If your safety file or incoming test calls for a 1-minute hi-pot, ask our FAE team to confirm the test condition for SYT111Q068DB1A1D before you write it into your qualification plan.

LEDs.Both jacks put yellow on pins 11→12 at the left and green on pins 13→14 at the right, so the LED nets map one to one between the two datasheets. The forward-voltage ranges are written differently (Würth 1.8–2.4 V; VOOHU green 1.85–2.45 V, yellow 1.7–2.2 V, all at 20 mA), so recheck the LED current with your series resistors.

Body and panel.The VOOHU body is 16.00 × 21.10 × 13.45 mm against 16.0 × 21.25 × 13.5 mm for Würth, and its pins extend 3.60 mm below the board against 3.5 ± 0.5 mm. Check the front-panel cutout and board thickness with a sample in your enclosure.

Which designs is SYT111Q068DB1A1D suited to?

SYT111Q068DB1A1D fits single-port gigabit Ethernet on industrial controllers, gateways, embedded and single-board computers where the jack is mounted tab-down, the port does not carry PoE and the board works within −40 to +85 °C. If you are still deciding between a jack with integrated magnetics and a discrete transformer plus RJ45, seehow to choose integrated or discrete RJ45 connectors.

产品SYT111Q068DB1A1D

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FAQ

Q1: What is a 7499111121A equivalent with integrated magnetics?

VOOHU SYT111Q068DB1A1D is a functional alternative to the Würth 7499111121A — verify with samples in your design. It is a single-port, tab-down 1000BASE-T RJ45 jack with integrated magnetics, yellow-left / green-right LEDs and a −40 to +85 °C operating range, with shield pins on 15.75 mm centres instead of 15.49 mm.

Q2: Does SYT111Q068DB1A1D fit a 7499111121A footprint?

Most of the hole pattern shares its centres: the ten signal holes on a 1.27 / 2.54 mm stagger, the two locating posts on 11.43 mm, and the four LED holes within 0.02 mm. The two shield-pin holes do not: they sit on 15.75 mm centres for VOOHU and 15.49 mm for Würth. Re-check those two holes, and the slightly different hole diameters, against the VOOHU drawing before you build a sample board.

Q3: What is the RJ45 MagJack pinout of 7499111121A and SYT111Q068DB1A1D?

On both datasheets, pins 1/2, 3/6, 4/5 and 7/8 are the four PHY-side differential pairs, pin 9 is the PHY-side centre tap (labelled VCC on the Würth drawing), pin 10 is GND, which the four 75 Ω terminations reach through a 1000 pF / 2 kV capacitor, pins 11→12 drive the yellow LED and pins 13→14 drive the green LED.

Q4: Can the 7499111121A and SYT111Q068DB1A1D RJ45 MagJacks be used for PoE?

Neither part has a published PoE rating: the Würth datasheet gives no PoE rating and the VOOHU product page lists SYT111Q068DB1A1D as not PoE rated. For a PoE port, use the PoE filter in theRJ45 selector, or ask our FAE team for a PoE-rated tab-down jack.

Get SYT111Q068DB1A1D samples and a footprint check

Attach the PCB footprint you built for 7499111121A, or a drawing of it, to thesample request form. Samples are available for evaluation, and selected parts are free of charge. Our FAE team will be glad to confirm the options for your project. Our FAE team can suggest suitable parts and help check the design, starting with the two shield-pin holes and the hole diameters ofSYT111Q068DB1A1Dagainst your board, and the isolation test condition your plan requires.

VOOHU supplies RJ45 and SFP connectors, LAN and PoE transformers and common mode chokes from Suzhou, China, to more than 1,500 customers.

Looking at other tab-down jacks with integrated magnetics, or a different port count? TheRJ45 connector selectoropens pre-filtered to integrated magnetics and tab down.

Related product:SYT111Q068DB1A1D— 1 × 1 tab-down 1000BASE-T RJ45 jack with integrated magnetics, yellow / green LEDs, −40 to +85 °C, DIP.