100/1000 BASE-T PoE+ LAN Transformer Selection Comparison: VOOHU WHSG24R03C0 vs. CND-tek G24191S
100/1000 BASE-T PoE+ LAN Transformer Selection Comparison: VOOHU WHSG24R03C0 vs. CND-tek G24191S
1. Competitor Product Overview (CND-tek)
A single-port Gigabit PoE+ interface has four differential channels to manage. Its magnetics must carry the 1000BASE-T signal path while maintaining cable isolation, common-mode behavior, and power current. CND-tek G24191S is a 24-pin SMD 100/1000M PoE+ single-port transformer module for four Cat5 UTP pairs, with a stated 720 mA capability per PoE port. For a board-level alternate, the practical starting point is the four-channel winding map, center taps, pin locations, isolation condition, and footprint - not just the package outline.
2. VOOHU Replacement Overview (Suzhou VOOHU Electronic Technology Co., Ltd.)
VOOHU WHSG24R03C0 is a 24-pin SMD 100/1000 BASE-T LAN transformer using four 1CT:1CT channels with stated IEEE 802.3at and 720 mA PoE+ capability. Its Cable Side and Chip Side signal, center-tap, and MCT assignments map to the same pin numbers as G24191S, making it a candidate for replacement evaluation. Matching terminal positions alone do not establish a pin-to-pin replacement; overlay the PCB/CAD data, then check component height, PoE implementation, isolation withstand, and samples before release.
3. Key Parameter Comparison
The table retains only functionally matched items from both parts and preserves the original test conditions. Different frequency ranges, formulas, or test-current conditions are selection inputs, not a performance ranking.
| Comparison item | CND-tek G24191S | VOOHU WHSG24R03C0 |
|---|---|---|
| Product format | 100/1000M PoE+ single-port transformer module, 24-pin SMD | 100/1000 BASE-T LAN transformer, 24-pin SMD |
| Winding and pin grouping | Four 1CT:1CT channels; Cable Side TCT/TD and Chip Side MCT/MX; pins 1-12 / 13-24 | Four 1CT:1CT channels; Cable Side TCT/TD and Chip Side MCT/MX; pins 1-12 / 13-24 |
| Body outline and pitch | 15.10 ±0.25 mm × 7.10 ±0.25 mm; 1.00 mm pitch | 15.10 ±0.25 mm × 7.10 ±0.25 mm; 1.00 mm Typ pitch |
| Open-circuit inductance (OCL) | 350 µH Min. @ 100 kHz, 100 mV, 8 mA DC Bias | 350 µH Min. @ 100 kHz, 0.1 V, 8 mA DC Bias |
| Leakage inductance | 0.5 µH Max. @ 100 kHz, 0.1 V | 0.5 µH Max. @ 100 kHz, 0.1 V |
| DCR | 1.40 Ω Max. | 1400 mΩ Max. |
| Turns ratio | 1CT:1CT (TX), 1CT:1CT (RX), ±5% | 1CT:1CT, ±3% |
| Insertion loss | -1.0 dB Max. @ 0.3-100 MHz | -1.2 dB Max. @ 0.5-1 MHz; -0.2-0.002*f^1.4 dB Max. @ 1-125 MHz |
| Return loss | -18 dB Min. @ 1-30 MHz; -14 dB Min. @ 30-60 MHz; -12 dB Min. @ 60-80 MHz; -10 dB Min. @ 80-100 MHz | -16 dB Min. @ 1-40 MHz; -10+20*log(f/80) dB Min. @ 40.1-100 MHz |
| Crosstalk | -30 dB Min. @ 1-100 MHz | -30 dB Min. @ 1-100 MHz |
| Common-mode rejection | -30 dB Min. @ 1-100 MHz | -30 dB Min. @ 1-100 MHz |
| Isolation withstand | 1500 Vrms, 2 mA, 60 s | 1500 VAC, 1 mA, 60 s |
| PoE+ capability | IEEE 802.3at; 720 mA per PoE port; End-span and Mid-span | IEEE 802.3at; 720 mA current capability |
| Operating temperature | -40°C to +85°C | -40°C to +85°C (including temperature rise) |
| Storage temperature | -40°C to +125°C | -40°C to +85°C |
Notes:
- The 24-pin functions and four winding channels can be matched item by item. The body length and width are similar, but the heights differ. These similarities alone do not establish a pin-to-pin replacement. Overlay the PCB/CAD data for land length, row spacing, component height, marking polarity, and nearby assembly clearance before validating samples.
- The two DCR entries state the same value in different units: 1.40 Ω equals 1400 mΩ.
- Insertion-loss and return-loss bands, segments, or formulas differ. The original conditions are retained in the table; review margin against the target PHY, cable length, and operating band rather than ranking one isolated frequency point.
4. Applications
- Industrial gateways, industrial switches, routers, and network-edge equipment with a 1000BASE-T PoE+ single-port uplink.
- Wireless access points, IP cameras, and PoE-powered equipment that carry data and power on one Ethernet cable.
- PHY-to-RJ45 cable-side interfaces using a 24-pin SMD Gigabit magnetic component, with four differential paths and center taps checked first.
- Existing-board alternates and new-design introduction after PCB/CAD overlay, PoE load, isolation withstand, and system-link validation are complete.
5. FAQ
Can WHSG24R03C0 be treated as a pin-to-pin replacement for G24191S?
Not without validation. Pin functions and four winding channels can be matched. The body length and width are similar, but the heights differ. The land pattern, component height, PoE implementation, and isolation acceptance still need PCB/CAD overlay and sample verification on the original board.
Can the OCL and leakage-inductance values be used as the only selection criteria?
No. Turns-ratio tolerance, insertion loss, return loss, common-mode rejection, terminal connection, and PoE operating conditions also affect the Gigabit link and power implementation.
Why are insertion loss and return loss not ranked directly?
The frequency bands, segments, and formulas differ. Ranking isolated values taken under different conditions can mislead; review them against the target system band and test method.
What should be verified first with samples?
Start with PCB land pattern, polarity, and assembly height. Then validate the Gigabit link, PoE load, isolation withstand, and reflow assembly in the target PHY circuit before approving a material change.
Why VOOHU?
One-stop sourcing: connectors + magnetics + interface chips, full support from selection to small-batch production.
Custom solutions: just share your application requirements and budget to get a tailored solution with professional technical support.
Fast development: direct from the manufacturer, rapid FAE response, efficient sampling, shorter time-to-market.
Core qualifications: ISO9001, ISO14001, RoHS, REACH; two in-house factories ensure delivery and quality.
For more information, visit VOOHU: China www.voohu.cn | Overseas www.voohuele.com | Technical support: song.lei@voohu.cn
Replacement Cross-Reference
VOOHU WHSG24R03C0 is a replacement-evaluation candidate for CND-tek G24191S. Matching 24-pin functions do not establish a pin-to-pin replacement; final approval requires PCB/CAD overlay and sample validation in the target design.
