LAN Transformer： VOOHU WHSG24301TG as Replacement for Pulse HX5120NL

1. Competitor Product Overview (Pulse Electronics / YAGEO)

Pulse Electronics (a YAGEO company) HX5120NL (Tape & Reel: HX5120NLT) is a 1000BASE-T single-port (4-channel integrated) low-profile SMD Ethernet transformer module in a 24-pin package, compliant with IEEE 802.3, RoHS compliant, JEDEC moisture sensitivity Level 1, with a peak reflow temperature of 245°C. The HX is the extended-temperature version operating over -40°C to +85°C, with a 1CT:1CT (1:1 ±2%) turns ratio and 1500 Vrms input-to-output isolation, designed for space-constrained Gigabit Ethernet interfaces (height only 2.08 mm Max).

2. VOOHU Replacement Product (Su Zhou Voohu Electronic Tech. Co., Ltd.)

VOOHU WHSG24301TG is the ideal drop-in replacement offering equivalent functionality with superior cost-effectiveness and supply stability. It is a 100/1000 BASE-T single-port (4-channel integrated) low-profile SMD transformer module in a fully pin-compatible 24-pin package (pinout identical to the HX5120NL, with matching 4-channel TD±/TDCT and TX±/TXCT positions), with the same circuit topology (1CT:1CT × 4 channels) and the same -40°C to +85°C wide-temperature operating range — allowing direct substitution for the Pulse HX5120NL with no PCB redesign.

3. Key Parameter Comparison

The table below maps the Pulse datasheet / product-page parameters to the corresponding VOOHU WHSG24301TG specifications. 

Notes:

1.Both parts operate over -40°C to +85°C (wide/industrial temperature), share an identical pinout, footprint and circuit topology (1CT:1CT × 4 channels) in a low-profile 24-pin package, enabling true pin-for-pin replacement.

2.Turns-ratio tolerance is ±2% (Pulse) vs ±5% (VOOHU). ③ DCR is specified on a different basis: Pulse states 0.65 Ω Max per half-winding (1/2 winding), VOOHU states 1.4 Ω Max total — not directly comparable; bench measurement is recommended.

3.Storage temperature: Pulse -50~+125°C is wider than VOOHU -40~+85°C; the operating temperatures are identical.

4.Package dimensions are close (1.27 mm pin pitch, 13.97 mm pin span, pad-compatible), both low-profile; VOOHU height 2.85 mm is slightly taller than Pulse 2.08 mm — verify clearance.

4. Application Scenarios

1000BASE-T (Gigabit Ethernet) single-port quad-channel low-profile SMD transformer modules are widely used in:

1. Gigabit Ethernet Switches and Routers

Suitable for enterprise and industrial-grade Gigabit switches and routers. Single-port quad-channel integration reduces PCB footprint; the low-profile package (height < 3 mm) meets thin-device space requirements.

2. Server Motherboards and Network Interface Cards (NIC)

Ideal for server motherboards and Gigabit NICs. The -40°C to +85°C wide-temperature range accommodates data center and industrial server environments; pin and package compatibility allows direct substitution of the Pulse design.

3. Industrial Ethernet and Edge Computing Gateways

Suitable for industrial switches, edge gateways and SCADA systems. The -40°C to +85°C range covers harsh factory environments; 1500 V isolation ensures safety.

4. Networking and Access Equipment

Suitable for routers, fiber/DSL access devices and small-cell backhaul modules; supports 100/1000 BASE-T dual-speed auto-negotiation, with low-profile packaging for high-density integration.

5. Consumer Electronics and Surveillance Equipment

Suitable for set-top boxes, IP network cameras, NVR/DVR and height-constrained consumer/security electronics with a Gigabit Ethernet port.

5. Frequently Asked Questions (FAQ)

Q1: Is VOOHU WHSG24301TG fully pin-compatible with Pulse HX5120NL? Can it be replaced without a PCB change?

A: Yes. Both use a 24-pin low-profile SMD package with 1.27 mm pin pitch and 13.97 mm pin span, with an identical 4-channel pinout (matching TD±/TDCT and TX±/TXCT positions) and the same per-channel 1CT:1CT topology. WHSG24301TG is a direct drop-in with no PCB redesign; only verify enclosure height clearance (Pulse 2.08 mm vs VOOHU 2.85 mm).

Q2: Do both parts share the same temperature grade?

A: The operating temperature is identical — both -40°C to +85°C (wide/industrial), suitable for industrial Ethernet, data centers and temperature-variable environments. Pulse's storage range (-50~+125°C) is slightly wider than VOOHU's (-40~+85°C), but this does not affect normal use or substitution.

Q3: What is the minimum order quantity (MOQ) and lead time for WHSG24301TG?

A: WHSG24301TG is packaged in Tape & Reel at 1,100 pcs per reel (2,200 pcs per inner carton, 4,400 pcs per export carton). VOOHU supports sample orders shipped within 48 hours and delivered within 7 days. For bulk pricing, contact: TEL: +86 400 1048 018, WEB: www.voohuele.com.

Why Choose VOOHU?

One-Stop Sourcing: Connectors + Magnetics + Interface ICs — full support from component selection to small-batch production

Custom Solutions: Share your application requirements and budget; receive a tailored solution with dedicated technical support

Fast Development: Direct factory sales, rapid FAE response, efficient sampling — accelerate your time-to-market

Core Certifications: ISO9001, ISO14001, RoHS, REACH — two proprietary factories ensuring on-time delivery and quality

Visit us: China: www.voohu.cn  |  Global: www.voohuele.com  |  Technical Support: song.lei@voohu.cn
Download PDF：WHSG24301TG